Glossary Technical Terminologies

Hanwha Techwin - Security Global Leader

The glossary explains technical terminologies in an easy-to-understand format.



A system for detecting errors in color balance in white and black areas of the picture and automatically adjusting the white and black levels of both the red and blue signals as needed for correction.


It is a multimedia container format as part of its Video for Windows technology. AVI files can contain both audio and video data in a file container that allows synchronous audio-with-video playback.

Auto touch sensor

It is the sensor to detect of finger os over to recognition sensor. when fingerprint identification mode is used

Auto pan, swing

Automatic back and forth camera motion.

Auto delete,timed expiry,auto retention

Can not search recorded data that is recorded before setting time.

Auto iris

Auto iris automatically control iris opening for the amount of light regarding environment's brightness. There are 2types DC-iris and video-iris.


Authentication is the act of establishing or confirming something (or someone) as authentic, that is, that claims made by or about the subject are true.


Parallel ATA (PATA) is an interface standard for the connection of storage devices such as hard disks, solid-state drives, floppy drives, and CD-ROM drives in computers. The standard is maintained by X3/INCITS committee[1]. It uses the underlying AT Attachment (ATA) and AT Attachment Packet Interface (ATAPI) standards.

Aspect ratio

The aspect ratio of a shape is the ratio of its longer dimension to its shorter dimension. It may be applied to two characteristic dimensions of a three-dimensional shape or for symmetrical objects that are described by just two measurements.


ASK is a form of modulation that represents digital data as variations in the amplitude of a carrier wave.
The amplitude of an analog carrier signal varies in accordance with the bit stream (modulating signal), keeping frequency and phase constant. The level of amplitude can be used to represent binary logic 0s and 1s.


Application-specific integrated circuit, an integrated circuit (IC) customized for a particular use, rather than intended for general-purpose use.


A satae that all accesses are denied. In this state, reader doesn't process of input port.


An archive is a collection of historical records, as well as the place they are located. Archives contain primary source documents that have accumulated over the course of an individual or organization's lifetime.


An application programming interface (API) is an interface implemented by a software program to enable interaction with other software, similar to the way a user interface facilitates interaction between humans and computers.

Aperture compensation

Technique that can get more improved image using amplifier of aperture of object.


A security mechanism preventing an access card or similar device from being used to enter an area a second time without first leaving it (so that the card cannot be passed back to a second person who wants to enter).

Angle of view

In photography, angle of view describes the angular extent of a given scene that is imaged by a camera. It is used interchangeably with the more general term field of view.


The process by which the illumination incident upon the face of a pickup device is automatically adjusted as a function of scene brightness.

Alarm input (sensor input)

Alarm input is a kind of external input for receiving of event.

Alarm event

The event is caused from changing status of sensor.


Automatic gain control (AGC) is an adaptive system found in many electronic devices. The average output signal level is feedback to adjust the gain to an appropriate level for a range of input signal levels.


Automatic focus systems rely on one or more sensors to determine correct focus.


ADSL is one form of the Digital Subscriber Line technology, a data communications technology that enables faster data transmission over copper telephone lines than a conventional voiceband modem can provide. It does this by utilizing frequencies that are not used by a voice telephone call. A splitter allows a single telephone connection to be used for both ADSL service and voice calls at the same time.


Adaptive DPCM (ADPCM) is a variant of DPCM (differential pulse-code modulation) that varies the size of the quantization step, to allow further reduction of the required bandwidth for a given signal-to-noise ratio.


An Internet Protocol (IP) address is a numerical label that is assigned to devices participating in a computer network that uses the Internet Protocol for communication between its nodes.


An analog-to-digital converter is a device which converts continuous signals to discrete digital numbers. The reverse operation is performed by a digital-to-analog converter.

Adaptive mode

Device control sensor parameter by itself for improving entered fingerprint status. When we use this mode, registration takes more time than not using.


An electrical adapter may enable connection of a socket used in one region to a plug used in another by offering connections for the disparate contact arrangements, while not changing the voltage. Subsidize device for machine and device for purpose or for attaching.


This is a abbreviation of Access Control Unit.


ActiveX is a framework for defining reusable software components that perform a particular function or a set of functions in Microsoft Windows. Normally activeX is used in Internet Explorer.


Make something to activate.


When event occurred on video, a manager delete the mark thereby pressing ACK button.

Access point

Controled physical point from system like doors and gate.

Access level

Rate of defined authority and access time from reader

Access granted/denied

Access granted/denied is a capacity which enables/disables an authority to control access to areas and resources in a given phisical facility.

Access control
Access control is a system which enables an authority to control access to areas and resources in a given physical facility.


Standard of audio compression method. This is the next generation of MP3.

Feature whereby the equipment automatically selects the correct termination depending on whether the video output BNC is connected.

Automatic Iris Lens
A lens in which the aperture automatically opens or closes to maintain proper light levels on the camera's pickup device.

Automatic Gain Control(AGC)
An electronic circcuit used by which the gain of a signal is automatically adjusted as a function of its input or other specified parameter.

Automatic Frequency Control(AFC)
An electronic circcuit used whereby the frequency of an oscillator is automatically maintained within specified limits.

Auto White Balance
Feature on color cameras whereby the camera constantly monitors the light and adjusts its color to maintain white areas.

In general terms, a reduction in signal strength. A decrease or loss in a signal. Reduction of signal magnitude (loss) normally measured in decibels.

Aspherical Lens
A Lens designed with a non spherical shape so that it refracts the light passing through it to either lower the lens aperture so that it passes more light or decreases barrel distortion on wide angle lenses.

Aspect Ratio
The ratio of the picture frame width to the picture frame heght in standard TV systems. It is 4 units horizontal over 3 units vertical.

The lens opening that controls the amount of light reaching the pickup device (image). In television optics, it is the effective diameter of the lens that controls the amount of light reaching the photoconductive or photoemitting image pickup sensor

Angle of View
The maximum scene angle that can be seen through a lens.

A single in which any level is represented by a directly proportional voltage; not digital.

The ability of CCTV equipment to respond to an input signal, normally a simple switch closure. The response varies depending on equipment type, most common is for switcher to 'hold' on the camera corresponding to the alarm input.

Activity Detection
A feature of the Generation 3 video multiplexer range that uses video motion detection techniques to improve the camera update times. It also gives a relay closure.

ALC.(Automatic Level Control)
On Al lenses, also known as the peak/aversage control. Adjusting this control allows the auto iris circuity to either take bright spots more into consideration (peak), bringing out detail in bright areas, or less into consideration (average) bringing out detail in shadows.

Automatically adjusts the white balance in response to varying light conditions.

Lacking synchronization. In video, a signal is asynchronous when its timing differs from that of the system reference signal. A foreign video signal is asynchronous before a local frame synchronizer treats it.

Long-term off-line storage. In digital systems, pictures are generally archived onto some form of hard disc, magnetic tape, floppy disk or DAT cartridge, CDROM or DVD.

Asymmetric Digital Subscriber Line: Modems attached to twisted pair copper wiring that transmit up to 8 Mbps downstream (to the subscriber) and up to 1Mbps upstream (from the subscriber), depending on line distance, loop plant condition, electrical noise, and technology and implementation options. It is known as Asymmetric because of the different data rates upstream and down stream.

American National Standards Institute

American Wire Gauge. A wire diameter specification based on the American standard. The smaller the AWG number, the larger the wire diameter. Alternatively :- the measure of the diameter of a conductor. AWG is the U.S. standard measuring gauge for certain conductors, including copper. The higher the AWG number the thinner the wire. This measure stems from the fact that the original measurement represented the number of times the wire was run through a wire machine which thus reduced the diameter of the wire. Thus a 24-guage wire was thinner than an 18-guage wire because it was run through a wire machine 6 more times than the 18-guage wire, reducing the overall diameter.

Asynchronous Transfer Mode. A transporting and switching method in which information does not occur periodically with respect to some reference such as a frame pattern.

American Standard Code for Information Interchange. A 128-character set thatincludes the upper case and lower-case English alphabet, numerals, special symbols and 32 control codes. A 7-bit binary number represents each character. Therefore, one ASCII-encoded character can be stored in one byte of computer memory.

Advanced Intelligent Tape (AIT) a type of tape drive sometimes used for storage of digital video images.

/D (AD)
Usually refers to analog to digital conversion.

Usually applied where a power supply can be either Alternating Current or Direct Current.

Alternating Current.

A term from optics that refers to anything affecting the accuracy of the image when compared with the original scene.

Automatic Light Control
The process by which the illumination incident upon the face of a pickup device is automatically adjusted as a function of scene brightness.

Automatic Brightness Control
In display devices, the self-acting mechanism which controls brightness of the device as a function of ambient light.

Auto Light Range
The range of light, e.g., sunlight to moonlight, over which a TV camera is capable of automatically operating at specified output.

Auto Balance
A system for detecting errors in color balance in white and black areas of the picture and automatically adjusting the white and black levels of both the red and blue signals as needed for correction.

Aperture Correction
Compensation for the loss in sharpness of detail because of the finite dimensions of the image elements or the dot-pitch of the monitor.

Automatic Gain Control. A circuit for automatically controlling amplifier gain in order to maintain a constant output voltage with a varying input voltage within a predetermined range of input-to-output variation.


One of output type of reader with key. Key value of Keypad match Wiegand format and output to prescribed value.


When camera make hanging on celling or wall, use bracket at indoor and pole stand at outdoor.


Most commonly used video cable connector in CCTV system.


The BMP file format, sometimes called bitmap or DIB file format, is an image file format used to store bitmap digital images, especially on Microsoft Windows and OS/2 operating systems.


The defocusing of regions of the picture where the brightness is at an excessive level, due to enlargement of spot size and halation of the fluorescent screen of the cathode-ray picture tube. In a camera, sensor element saturation and excess which causes widening of the spatial representation of a spot light source.


Blocking phenomenon of the digital video coding blocks for the quantization error caused by the process of quality degradation is the most common.


Backlight compensation is video gain done either manually or automatically to correct the exposure of subjects that are in front of a bright light source.

Bit rate

In telecommunications and computing, bitrate (sometimes written bit rate, data rate or as a variable R or fb) is the number of bits that are conveyed or processed per unit of time.


A technology using physical characteristics for distinguishing access people .

Biometric access control

Identification process carry out access control through body characteristics.


A manufacture companay name. It develop cable and cable product.


A drive bay is a standard-sized area for adding hardware to a computer. Most drive bays are fixed to the inside of a case, but some can be removed.
They used mainly for hard disks and floppy disk drives. Half-height drive bays are the standard housing for CD and DVD drives in modern computers.

Baud rate

The baud rate of a data communications system is the number of symbols per second transferred. A symbol may have more than two states, so it may represent more than one binary bit (a binary bit always represents exactly two states). Therefore the baud rate may not equal the bit rate, especially in the case of recent modems, which can have (for example) up to nine bits per symbol.


Bandwidth may refer to bandwidth capacity or available bandwidth in bit/s, which typically means the net bit rate, channel capacity or the maximum throughput of a logical or physical communication path in a digital communication system.

Bad sector

A bad sector is a sector on a computer's disk drive or flash memory that cannot be used due to permanent damage, such as physical damage to the disk surface or failed flash memory transistors. It is usually detected by a disk utility software such as CHKDSK or SCANDISK on Microsoft systems, or badblocks on Unix-like systems. When found, these programs mark the sectors unusable and the operating system skips them in the future.


In information technology, a backup or the process of backing up refers to making copies of data so that these additional copies may be used to restore the original after a data loss event.


A backbone network or network backbone is a part of computer network infrastructure that interconnects various pieces of network, providing a path for the exchange of information between different LANs or subnetworks. A backbone can tie together diverse networks in the same building, in different buildings in a campus environment, or over wide areas. Normally, the backbone's capacity is greater than the networks connected to it.

Back focus

Distance between lense to focus.

A term indicating that a high impedance video line is paralleled, usually through a switch, to a source of video. A separate overall video output.

Video connector, the most commonly used in CCTV.

The halation and defocusing effect that occurs around the bright areas of the picture (highlight) whenever there is an increase in the brightness intensity.

Blanking (Field And Line Flyback Blanking)
The operation of turning off the monitor display, or pick-up device, during sync pluses to avoid thin white lines appearing on the picture.

Black Level
The level of the video signal that corresponds to the maximum limits of the black areas of the picture.

Video Unmodulated video signal suitable for display on a monitor but not a domestic TV.

Band Width
The frequency range of a signal. The span that the infomation-bearing signal occupies or requires or the difference between the lowest and highest frequency of a band.

Balanced Signal
Method of transmitting video, usually over twisted pair cable, that consists of two equal but opposite signals being sent down two conductors.

Back Focus
The mechanical alifning of the imaging device with the focal point of the lens. Most important on zoom lenses to ensure the image stays in focus throughout the zoom range.

B.L.C.(Back Light Compensation)
A feature of modurn CCD cameras which electronically compensates for high background lighting to give detail which would normally be silhouetted.

Byte is 8 binary bits (ones and zeroes). The greater multiples of bytes are shown below Kilobyte (1,024 bytes) Megabyte (1,024 kilobytes, 10488576) Gigabyte (1,024 Megabytes 1073741824 bytes) Terabyte (1,024 Gigabytes 1099511627776 bytes) Petabyte (1,024 Terabytes 1125899906842624 bytes) Exabyte (1,024 Petabytes 1152921504606846976 bytes) Zettabyte (1,024 Exabytes 1180591620717411303424 bytes) Yottabyte (1,024 Zettabytes 1208925819614629174706176 bytes)

Burst (colour burst or chroma burst)
Ten cycles (PAL) or seven to nine cycles (NTSC) of sub-carrier placed near the end of horizontal blanking to serve as the phase (colour) reference for the modulated colour sub-carrier. It enables the monitors' Phase Locked Loop to synchronize and track the change of phase during every line of video.

Bitmap (BMP)
A pixel-by-pixel description of an image. Each pixel is a separate element. Also a computer file format for pictures.

A contraction of BInary digiT. Elementary digital information that can only be 0 or 1. The smallest part of information in a binary notation system. A bit is a single 1 or 0. In computer terms, a group of 4 bits is a nibble, 8 bits is a byte and 16 bits a word.

A base 2 numbering system using the two digits 0 and 1 (as opposed to ten digits [0-9] in the decimal system). In computer systems, the binary digits are represented by two different voltages or currents, one corresponding to zero and another corresponding to one, positive logic uses a positive voltage to represent binary 1 and zero volts to represent binary 0.

The attribute of visual perception in accordance with which an area appear to emit more of less light. (Luminance is the recommended name for the photo- electric quantity which has also been called brightness.)

Sudden variations in picture presentation (brightness, size, etc.,) independent of scene illumination

Bar Test Pattern
Special test pattern for adjusting color TV receivers or color encoders. The upper portion consists of vertical bars of saturated colors and white. The power horizontal bars have black and white areas and I and Q signals.

Back Porch
That portion of the composite picture signal which lies between the trailing edge of the horizontal sync pulse and the trailing edge of the corresponding blanking pulse.

CS mount

CS-mount has a flange focal distance of 12.52 millimetres (0.493 in), and is otherwise identical to the C-mount: (1 inch diameter, 32 TPI).

Covert(hidden camera)

Hidden camera that is not displayed but is recorded for privarcy.


A converter is a device that changes something into a different form.


The term controller, when used in computing and especially in computer hardware, signifies a chip or extension card that interfaces with a peripheral device. This may be a link between two parts of a computer (for example a memory controller that manages access to memory for the computer) or a controller on an external device that manages the operation of (and connection with) that device. A controller is usually also an adapter.

Control panel

A control panel is a device which can control the access to the gate. (exclude Reader)


Contrast is the difference in the color and brightness of the object and other objects within the same field of view.

Context menu

A context menu is a menu in a graphical user interface (GUI) that appears upon user interaction, such as a right mouse click or middle click mouse operation.

Contactless card

Proximity card (or Prox Card) is a generic name for contactless integrated circuit devices used for security access or payment systems. It can refer to the older 125 kHz devices or the newer 13.56 MHz contactless RFID cards, most commonly known as contactless smartcards.


Composite video is the format of an analog television (picture only) signal before it is combined with a sound signal and modulated onto an RF carrier. It is usually in standard formats such as NTSC, PAL, and SECAM.

Component video

Component video is a video signal that has been split into two or more components.

Color temperature
a characteristic of visible light that has important applications in lighting, photography, videography, publishing, manufacturing, astrophysics, and other fields.

Color signal

Color is the visual perceptual property corresponding in humans to the categories called red, green, blue and others.

Color burst

colorburst is a signal used to keep the chrominance subcarrier synchronized in a color television signal.

A codec is a device or computer program capable of encoding and/or decoding a digital data stream or signal.

COAX control

Coaxial cable, or coax, is an electrical cable with an inner conductor surrounded by a flexible, tubular insulating layer, surrounded by a tubular conducting shield.


Coaxial cable, or coax, is an electrical cable with an inner conductor surrounded by a flexible, tubular insulating layer, surrounded by a tubular conducting shield.


CMS is management software for windows.


an image sensor consisting of an integrated circuit containing an array of pixel sensors. Each pixel contains a photodetector and an active amplifier.


A client is an application or system that accesses a remote service on another computer system, known as a server, by way of a network.


CIF (Common Intermediate Format), also known as FCIF (Full Common Intermediate Format), is a format used to standardize the horizontal and vertical resolutions in pixels of YCbCr sequences in video signals, commonly used in video teleconferencing systems. It was first proposed in the H.261 standard.

Chromatic aberration

chromatic aberration (also called achromatism or chromatic distortion) is a type of distortion in which there is a failure of a lens to focus all colors to the same convergence point. It occurs because lenses have a different refractive index for different wavelengths of light (the dispersion of the lens). The refractive index decreases with increasing wavelength.


Chroma is the signal used in video systems to convey the color information of the picture, separately from the accompanying luma signal.

Chime bell

Chime bell is function of the sound if open door.


A checksum or hash sum is a fixed-size datum computed from an arbitrary block of digital data for the purpose of detecting accidental errors that may have been introduced during its transmission or storage. The integrity of the data can be checked at any later time by recomputing the checksum and comparing it with the stored one. If the checksums do not match, the data was almost certainly altered (either intentionally or unintentionally).

Channel relay

A relay is an electrically operated switch. Many relays use an electromagnet to operate a switching mechanism, but other operating principles are also used.


CGI is a standard way for a web server to pass a web user's request to an application program and to receive data back to forward to the user.


Closed-circuit television (CCTV) is the use of video cameras to transmit a signal to a specific place, on a limited set of monitors.

CCD camera

A charge coupled device (CCD) camera is an apparatus which is designed to convert optical brightness into electrical amplitude signals using a plurality of CCDs, and then reproduce the image of a subject using the electric signals without time restriction.


A charge-coupled device (CCD) is a device for the movement of electrical charge, usually from within the device to an area where the charge can be manipulated, for example conversion into a digital value. This is achieved by "shifting" the signals between stages within the device one at a time.


Context-adaptive variable-length coding (CAVLC) is a form of entropy coding used in H.264/MPEG-4 AVC video encoding. It is an inherently lossless compression technique, like almost all entropy-coders.


A person of carrying access control card or tag.

Card reader

A memory card reader is a device used for communication with a smart card or a flash memory card.


Badge or identification at access control system which is recorded electronic information.


Video capture is the process of getting still image from video stream.

Cable modem

A cable modem is a type of network bridge and modem that provides bi-directional data communication via radio frequency channels on a cable television (CATV) infrastructure.


Context-adaptive binary arithmetic coding (CABAC) is a form of entropy coding used in H.264/MPEG-4 AVC video encoding. As such it is an inherently lossless compression technique. It is notable for providing considerably better compression than most other encoding algorithms used in video encoding.

C mount

A C-mount is a type of lens mount commonly found on 16mm movie cameras, closed-circuit television cameras, and trinocular microscope phototubes.
C-mount lenses provide a male thread which mates with a female thread on the camera.

An undesired signal that interferes with the desired signal.

The range of light and dark values in a picture or the radio between the maximum and the minimum brightness values.

Coaxial Cable
A type of shielded cable capable of carrying a wide range of frequencies (video or radio) with very low signal loss.

Chrominance (C)
The part of the video signal corresponding to the color information.

The common abbreviation for Closed Circuit Television. A private or closed television system.

Charged Coupled Device. This is a soild state semiconductor imaging device often referred to as an integrated circuit, chip or "image." Soild state cameras are sometimes referred to as CCD cameras. bright areas, or less into consideration (average) bringing out detail in shadows.

Short for Cable Access Television. The method for distributing RF signals via coaxial cable rather than radiated through the air.

Cathode Ray Tube (CRT)
The picture tube in a video monitor that can reproduce the picture image seen by the camera.

A device that translates light into a video image and transmits that image to a monitor for viewing. It contains the image sensor and other electronic circuitry to create a video signal.

The European TV standards 625 lines 50 fields.

C Mount/CS Mount
The two industry standards for mounting a lens on a camera. The C-Mount lens has a 17.5mm flange back distance. The CS-Mount lens has a 12.5mm flange back distance.

Compact Disc. A standard of media as proposed by Philips and Sony, where music is stored in digital form.

The crossover of the three electron beams of a three-gun tri-color picture tube. This normally occurs at the plane of the aperture mask.

The reduction in gain at one level of a picture signal with respect to the gain at another level of the same signal.

Composite Video Signal
The combined picture signal, including vertical and horizontal blanking and synchronizing signals.

Color Saturation
The degree to which a color is free of white light.

Color Encoder
A device which produces an NTSC color signal from separate R, G, and B video inputs.

Color Burst
That portion of the composite color signal, comprising a few cycles of a sine wave of chrominance subcarrier frequency, which is used to establish a reference for demodulating the chrominance signal. Normally approximately 9 cycles of 3.579545 MHz.

A device which functions during the horizontal blanking or synchronizing interval to fix the level of the picture signal at some predetermined reference level at the beginning of each scanning line.

Chroma Control
A control of color television receiver that regulates the saturation (vividness) of colors in a color picture.

That quality of color which embraces both hue and saturation. White, black, and grays have no chroma.

Dynamic range

Dynamic range, abbreviated DR or DNR, is the ratio between the smallest and largest possible values of a changeable quantity,


a device that records video in a digital format to a disk drive, USB flash drive, sd memory card or other memory medium within a device.


DVI is a video interface standard designed to provide very high visual quality on digital display devices such as flat panel LCD computer displays and digital projectors.

Duress alarm

Duress alarm system can provide notification in a variety of ways.


To force open the door to force the job situation, the alarm is set for a password to authenticate the door first, then work on a regular basis, and generates an alarm indicating that compulsory job.


A duplex communication system is a system composed of two connected parties or devices that can communicate with one another in both directions. There are 2types, Full-duplex and Half-duplex.

Dual finger mode

One ID of two modes to register the fingerprints and the fingerprints of each of these cases will be registered once.

The D-subminiature or D-sub is a common type of electrical connector used particularly in computers. Calling them "subminiature" was appropriate when they were first introduced,


Daylight saving time is the practice of temporarily advancing clocks so that afternoons have more daylight and mornings have less.

DSP is a specialized microprocessor with an optimized architecture for the fast operational needs of digital signal processing.


DPI is a measure of spatial printing or video dot density, in particular the number of individual dots that can be placed in a line within the span of 1 inch (2.54 cm).

Door sensor(door contact)
Check out the current state of contact with a magnetic sensor, and allow them to force a timeout or munyeolrim capabilities can be used munyeolrim.

Door open time

When the log ID authentication is time to open the door.


it translates domain names meaningful to humans into the numerical (binary) identifiers associated with networking equipment for the purpose of locating and addressing these devices worldwide.


Leaders do not handle the input port to prevent access by disabled is turned on.


Microsoft DirectX is a collection of application programming interfaces (APIs) for handling tasks related to multimedia, especially game programming and video, on Microsoft platforms.

DIP switch

A DIP switch is a set of manual electric switches that are packaged in a group in a standard dual in-line package.

Digital zoom

Digital zoom is accomplished by cropping an image down to a centered area with the same aspect ratio as the original, and usually also interpolating the result back up to the pixel dimensions of the original.


DHCP is a computer networking protocol used by hosts (DHCP clients) to retrieve IP address assignments and other configuration information.


If the Dome turns over 90degree by TILT, the displayed screen will be flipped vertically and horizontally.


Product that can be registered to CMS S/W. DVR, Encoder Box, Network Camera, NVR etc.

Depth of focus/field

Depth of focus is a lens optics concept that measures the tolerance of placement of the image plane (the film plane in a camera) in relation to the lens. In a camera, depth of focus indicates the tolerance of the film's displacement within the camera, and is therefore sometimes referred to as "lens-to-film tolerance."


A delimiter is a sequence of one or more characters used to specify the boundary between separate, independent regions in plain text or other data streams.


Deinterlacing is the process of converting interlaced video, such as common analog television signals or 1080i format HDTV signals, into a non-interlaced form.


A default refers to a setting or value automatically assigned to a software application, computer program or device, outside of user intervention. Such settings are also called presets, especially for electronic devices.


A decoder provides a monitoring solution by analog or digital monitor and display live video from Network camera and encoders. Samsung decoder provides HDMI, VGA or BNC video out.


Dynamic DNS is a method, protocol, or network service that provides the capability for a networked device, such as a router or computer system using the Internet Protocol Suite, to notify a domain name server to change, in real time the active DNS configuration of its configured hostnames, addresses or other information stored in DNS.

DC iris

DC-iris is a kind of auto iris.
The circuit (for contolling iris size) is inside the camera.


A database is a collection of data for one or more multiple uses.

Data bit

A bit is the basic unit of information in computing and telecommunications


DAS refers to a digital storage system directly attached to a server or workstation, without a storage network in between.


In electronics, a digital-to-analog converter (DAC or D-to-A) is a device for converting a digital (usually binary) code to an analog signal (current, voltage or electric charge).


This feature, depending on the ambient light where the illumination color, dark places, automatically switches to black and white to color images regardless of ambient light to allow monitoring.

A system developed initially for recording and playback of digitized audio signals, maintaining signal quality equal to that of a CD. Recent developments in hardware and software have led to a system for archiving digitized video signals.

Direct Drive. A method of controlling one form of auto iris lens (the other is video iris), where the electronic has been removed from the lens and is built into the camera. To use a DD lens with a camera, the camera must have a DD output.

Dwell Time
The length of time a switcher displays one camera before sequencing to the next. Usually a variable selting.

Duplex (Multiplexer)
A multiplexer with two frame stores allowing it to show multi-screen pictures while performing time multiplex recording.

Amplifier A device that accepts a video signal and sends it out over a number of independent outputs.

Digital Recording
This is the latest form of recording and is relatively new to the CCTV industry as a result is not the most economical method however it does have serveral advantages over the VCR analogue tape recorders. First of all it enables quick access to the desired image or picture. Digital images can also be enhanced or processed futher which can help detect images that may normally go unnoticed. One of the better properties of Digital Recording is that there is no replay degradation due to poor tape quality and unlike conventional video recording methods Digital Recording provides a clear image when paused.

A signal that levels are represented by binary numbers. These can be kept in a store.

Depth of Field
The area in focus in front of and behind the subject.

DC Type Lens
An auto-iris lens with internal circuit which receives voltage and a video signal from the camera to adjust the iris.

dB ( Decibel )
A measure of the power radio of two signals. It is equal to ten times the logarithm of the radio of the two signals.

Dynamic Range
The difference between the maximum acceptable signal level and the minimum acceptable signal level.

The deviation of the received signal waveform from that of the original transmitted waveform.

Digital Signal Processing ( DSP )
An algorithm within the camera that digitizes data (the image). Examples include automatic compensate for backlight interference, color balance variations and corrections related to aging of electrical components or lighting. Functions such as electronic pan and zoom, image annotation, compression of the video for network transmission, feature extraction and motion compensation can be easily and inexpensively added to the camera feature set.

Depth of Focus
The range of sensor-to-lens distance for which the image formed by the lens is clearly focused.

The fidelity of a television system to the original scene.

The circuitry in a color TV receiver which transforms the detected color signals into a form suitable to operate the color tube.

Exit reader

When an authorized user to use the passage to an unauthorized person to get along with the parts of becoming vulnerable to security complement to authenticate users to give to all.


Intrusion-detect, Input the alarm sensor, loss the image and so on.

Event recording

A more advanced form of CCTV, utilizing Digital Video Recorders (DVRs), provides recording for possibly many years, with a variety of quality and performance options and extra features (such as motion-detection and email alerts).

Event Monitoring

Display enlarged video if event occurs.


Ethernet is a family of frame-based computer networking technologies for local area networks (LANs). The name comes from the physical concept of the ether. It defines a number of wiring and signaling standards for the Physical Layer of the OSI networking model as well as a common addressing format and Media Access Control at the Data Link Layer.


ESD is the sudden and momentary electric current that flows between two objects at different electrical potentials caused by direct contact or induced by an electrostatic field.

Epoxy potted

In electronics, potting is a process of filling a complete electronic assembly with a solid compound for resistance to shock and vibration, and for exclusion of moisture and corrosive agents. Thermosetting plastics are often used.


In cryptography, encryption is the process of transforming information (referred to as plaintext) using an algorithm (called cipher) to make it unreadable to anyone except those possessing special knowledge, usually referred to as a key.


Encoding is the process of transforming information from one format into another. The opposite operation is called decoding.


Electromagnetic interference from outside the component or device to withstand the measured level value.

Product or part is riding on the radiation or conduction is interrupted in the period of the operation or function that is electrical energy.


EMI and EMS calls for malyida collectively.


It is embedded as part of a complete device often including hardware and mechanical parts.

EM format

EM Micro-electronics-Marin 社 from animals to recognize an object created for portable ASK (amplitude modulation) method is using RFID format. Open Format, the company released its first RFID-EM card or EM format by calling the ASK method, but even the company does not comply with Open format EM card or EM format can not be called.

Effective pixel

The number of effective pixels that an image sensor has is the count of elementary pixel sensors that contribute to the final image, as opposed to the number of total pixels, which includes unused or light-shielded pixels around the edges.

Erasable and Programmable Read Only Memory. An electronic chip used in many different security products that stores software instructions for performing various operations.

Ext. Sync(External Sync)
The ability of CCTV equipment, normally cameras, to accept one or more of the standard sync formats so as to align itself to the rest of the system.

The process of correcting losses of certain components in a signal.

EIA.(Electronic Industry Association)
US TV standard 525 lines 60 fields.

E.I.(Electronic Iris) Shutter
Electronic Iris shuttering is the ability of the camera to compensate for moderate light changes in indoor applications without the use of auto iris linses.

function control

One of the control panels that can control a selected image under Monitoring at CMS. (Function control, PTZ control)

full duplex

A duplex communication system is a system composed of two connected parties or devices that can communicate with one another in both directions. (The term multiplexing is used when describing communication between more than two parties or devices.)
Duplex systems are employed in many communications networks, either to allow for a communication "two-way street" between two connected parties or to provide a "reverse path" for the monitoring and remote adjustment of equipment in the field.


File Transfer Protocol (FTP) is a standard network protocol used to exchange and manipulate files over a TCP/IP-based network, such as the Internet. FTP is built on a client-server architecture and utilizes separate control and data connections between the client and server applications. FTP is used with user-based password authentication or with anonymous user access.


Fingerprints, irises, facial shapes, such as bio-recognition technology to identify individuals to evaluate the level of writing the term as a system to identify these individuals because of the matching error rate is wrong to deny. Ie log ID of the fingerprint of the fingerprint was not a log ID is to determine the rate.

frequency response
Continuous sine wave at the amplifier input, the output amplitude, phase two will see how going to change.


What happens to the images as still images, frames, or fields in memory, the memory still images or video display (VCR) in one frame as a still image and to display your say. In short, "Pause"

frame rate

The screen of a display device to display the data refers to the speed, says South Korea is called the frame speed or frame rate.

A lot of video images are displayed on the screen is a series of scenes. An image of this piece is called the Frame.

focal length

Focal length film (or CCD) is the distance between the lens.


Contrast this time replaced with the shift, I feel I see the eyes blink phenomenon. The frequency change is relatively easy to feel not only accepted. The NTSC and PAL TV mode approach, which look at different ways when you visit you may receive.

flange back

To attach the camera lens in the bag from the flange, if the distance is a CCD image sensors, which C-Mount (17.526mm) or, CS Mount (12.5mm) is destined to.
If the distance is not set correctly, you can not get a clear image.

fixed focal length lens
In film and photography, a prime lens is either a photographic lens whose focal length is fixed, as opposed to a zoom lens, or it is the primary lens in a combination lens system.


A firewall is device designed to manage(permit/deny) network transmissions based upon a set of rules and is frequently used to protect networks from unauthorized access while permitting legitmate communications to pass.


Field to create a vertical shot of the screen says. 30 frames a second in NTSC format, 60, is injected into the field. Skipping injections done, because a Conference field lines by injecting half the number of patterns 525 is an example 262.5.

The probability that the system incorrectly matches the input pattern to a non-matching template in the database. It measures the percent of invalid inputs which are incorrectly accepted.

F number

In optics, the f-number of an optical system expresses the diameter of the entrance pupil in terms of the focal length of the lens.

A term used to indicate the speed of a lens. The smaller the f-number, the greater is the amount of light passing through the lens. Also called F Number and F System. Refers to the speed or ability of a lens to pass light. It is calculated by dividing the focal length of the lens by its diameter.

A complete picture (525 scan lines). The frame consists of two fields of video information.

The size of the camera's pickup device(image). Current standard formats are 1/4", 1/3", and 1/2".

Foot Candle(FC)
A measurement of light. 1 lumen per square foot.

The focal point. An adjustment to the lens optics to improve the clarity of the picture.

Focal Length
The distance (in millimeters) from the lens to the surface of the image sensor. The shorter the distance, the wider the view: the longer the distance, the narrower (telephoto) the view.

Field of View
The distance from the flange of the lens (beginning of the lens mount) to the focal plane. C-mount lenses have a flange back distance of 17.526mm vs. 12.5mm for CS-mount.

Fiber Optic
The process of transmitting light throhgh a long, flexible fiber such as glass or plastic, for the purpose of transmitting video, audio, or data over long distances.

One half of a frame of video (262.5 scan lines).

Frame Frequency
The number of times per second that the frame is scanned. The U.S. standard is 30 frames per second.

Footlambert (FL)
A unit of luminance equal to 1/candela per square foot or to the uniform luminance at a perfectly diffusing surface emitting or reflecting light at the rate of one lumen per square foot. A lumen per square foot is a unit of incident light and a footlambert is a unit of emitted or reflected light. For a perfectly reflecting and perfectly diffusing surface, the number of lumens per square foot is equal to the number of footlamberts.

Focal Point
The point at which a lens or mirror will focus parallel incident radiation.


A graphical user interface (GUI) (sometimes pronounced gooey[1]) is a type of user interface item that allows people to interact with programs in more ways than typing such as computers; hand-held devices such as MP3 Players,


In Video coding, a group of pictures, or GOP structure, specifies the order in which intra- and inter-frames are arranged. The GOP is a group of successive pictures within a coded video stream. Each coded video stream consists of successive GOPs. From the pictures contained in it, the visible frames are generated.


Greenwich Astronomical Observatory of Greenwich in outer block of British London is mean solar time in last first meridian.


Weak signal is reflected by the later of the poor mixing or matching between the antenna and the feeder was caused by an image on a television receiver in addition to the normal pale as a ghost to the right dealer to double or multiple symptoms are overlapping.

gen-lock/ line-lock

Receiving fixed sync signal from camera outside internal synchronization same cycle or process that set as status speak, and purpose of synchronization is to need when apply several camera at the same time.


A gateway is a network point that acts as an entrance to another network.

gamma correction

Gamma correction, and analog color television CRT tube TV receivers in the way characteristics of the nonlinear correction to the video camera is on.


Gamma, display, etc. The original inherent nonlinearity refers. The actual image brightness and screen printed coefficient representing the relationship between image brightness.

gain value

This mean's value for increase that transfering from device.


When change light which is damascened from subject to biographical signal, it means conversion ratio. If GAIN grows, because change to big electric signal using light which is less, noise is grown on screen.


ITU voice codec standard that use 20/40 Kbps adaptation pulse code modulation (ADPCM) voice coding technique. G. 723 and G.723. 1 speaks voice encoding standard that define a used coding technology to compress audio signal ingredient of multimedia service in very low bit rate.


ITU standard in voice. It is basis audio codec standard of voice transmission mode in H.323 environment. ITU-T G.711 is 「 voice encoding 」 standard by 64 kbps PCMs.

Ground Loop
Effects video pictures in the from of a black shadow bar across the screen or as tearing in the top corner of a picture. Caused by different earth potentials in a system.

An electrical connection point that is common to either a metal chassis, a terminal, or a ground bus.

Gray Scale
The number of variations from white to gray to black.

A shadowy or weak image in the received picture, offset to either the right or to the left of the primary image.

An interference in the video signal that shows up as a vertical crawling of the picture or an oscillating hum in the audio.

Gamma Correction
To provide for a linear transfer characteristic from input to output device.

A numerical value, or the degree of contrast in a television picture, which is the exponent of that power law which is used to approximate the curve of output magnitude versus input magnitude over the region of interest.


(Ethernet) Hub is a device for connecting Ethernet devices together for network communicating.


HTTPS is a combination protocol of HTTP with SSL/TLS. HTTPS is network protocol for communicating encrypted(by SSL/TLS) data of WWW(World Wide Web)

HTTP is network protocol for communicating data of WWW(World Wide Web)

host PC
Controller or controllers are connected directly to the main computer network. Access control software and a database installed, and is responsible for managing the system.

horizontal scanning

Injection of right and left direction. This has read signal figure of pixel that compose screen sequentially to right and left direction or order record or mark.

horizontal resolution

Images can be distinguished by lines of horizontal resolution up to. TV on the screen, as determined by the number of black vertical lines indicate. The unit will use this, or Line.

holiday code
Holiday set by the user (except holidays) set the table indicates the code, the code capability is applied to various time schedules.

high resolution

High resolution speaks that number or to display information of screen at program according to specific mode number of used pixel of pixel (Pel) that exist to soft copy device usually that speak for quality of information that appear to output device (CCTV monitor) is resolution, this pixel means that is used much.


That detecting imposes temperature, shock, composition stress of voltage and promotes short period potential weakness region (design, piece part, manufacture) of product by a grass-roofed house inside stress test technology authoritativeness verification short time achievement.
- Tester performance
- Temperature change difference : - 100 ~ - 200
- Shock input : 40 Grmses
- Jindongchuk : 6 Axises
- The temperature change speed : 60 C/min

half duplex

A half-duplex system provides for communication in both directions, but only one direction at a time (not simultaneously). Typically, once a party begins receiving a signal, it must wait for the transmitter to stop transmitting, before replying.

H/V reverse

Screen flip is effect that reverse the image display on screen


H.264/AVC/MPEG-4 Part 10 (Advanced Video Coding) is a standard for video compression. The final drafting work on the first version of the standard was completed in May 2003.

Hz (Hertz)
Cycles per second

Horizontal Resolution
The maximum number of individual picture elements that can be distinguished in a single scanning line.

Method of controlling camera points using multi-core cable.

Electrical disturbance at the power supply frequency or harmonics thereof.

Corresponds to colors such as red, blue, etcetera.


A means of controlling the size of a lens aperture and therefore the amount of light passing
through the lens.


Wave length of infrared rays is fathom than visible ray, and from 0.75 μm electromagnetic wave belonging to 1mm extent. Infrared rays located under than visible ray are secret.


Internet Protocol version 6 (IPv6) is the next-generation Internet Protocol version designated as the successor to IPv4, the first implementation used in the Internet that is still in dominant use currently[update]. It is an Internet Layer protocol for packet-switched internetworks. The main driving force for the redesign of Internet Protocol is the foreseeable IPv4 address exhaustion. IPv6 was defined in December 1998 by the Internet Engineering Task Force (IETF) with the publication of an Internet standard specification, RFC 2460.


IPv4 Internet Protocol Address form of do.
Form of IP address is number address of 32 bits appearing by 4 numbers that is parted by period. Each number can become to 255 from 0.

1 second recording means that recording longevity. (FPS with the same meaning as the term)


Display protection grade by permeation and contact of solidity object and protection grade for intrusion of water by enclosure protection standard of electrical appliance.
+ dust tight(6) : No ingress of dust; complete protection against contact
 + powerful water jets(6) : Water projected in powerful jets against the enclosure from any direction shall have no harmful effects.
 + water jets(5) : Water projected by a nozzle against enclosure from any direction shall have no harmful effects.

IP Address

Identification data for computer or device in TCP/IP network. Network that use TCP/IP protocol does fetters and sends out message to IP address of the destination. Form of IP address is number address of 32 bits appearing by 4 numbers that is parted by period. Each number can become to 255 from 0. Recently, other methods that is IPv6 system are used.

Intrusion Detection

Intrusions or intrusion attempts or logs by hand to present information on the network through the use of expert systems is to detect.


physical trespass by an intruder.

interlace scanning

Interlace scanning one image method that mark alternately that is divided by odd number and even number horizontal line be. This method is a fact to improve image quality to be registered to video graphic device such as a television without heightening analog band width.

instant viewer

We can monitor 1 channel real-time in this instant viewer.

instant replay time

NET-I viewer> MAP Viewer to see images saved on the registered products, the starting point than the current time determines how much time the value of your previous shows. For example, a set of time instant replay three minutes, if the current time of 10:00 for 30 minutes of video playback starting at the 10:27 image is.

instant recording

Live monitoring detecting channel can be recorded when setted time(Maximum 10 minute) in main program.

instant player

This simple player can play 1 channel.


Set the value of all plant equipment at the factory turned to the state means.

image hold

The video image will be held still until the camera reaches the preset poisition when camera move from preset to another preset.

image compression

Image compression is to reduce image data for storing or transmiting data more efficiently. Most common compressing methods are JPEG, MPEG and H.264.


Processing of illumination is an important concept in computer vision and computer graphics.

IEEE802.11 a set of standards for implementing wireless local area network communication in the 2.4, 3.6 and 5GHz frequency bands.

IEEE 1394
IEEE1394 is a transmission technology between digital device that Apple Computer develops. I speak an interface technology that can connect communication equipment and computer and consumer electronics to single network and exchange multimedia data at the fast speed of 100 Mbpses∼1Gbps.

identification mode

User's ID is not only fingerprint biometric information, such as the input received as a mode to determine whether or not a registered user, the user ID has a discretion to determine the Verification mode over a long time.


Authorized log ID (or administrator) to identify the number or letter identifier code, etc. is made.


Input or Output

The adjustable opening (mechanical diaphragm) through which light can pass and be regulated.

Internal Sync (Crystal Controlled)
A camera that generates its sync pulses without reference to any other sourse.Normally using a crystal controlled oscillator.

A scanning process where every other horizontal line is scanned in one field while the alternate lines are scanned in the next field to produce a complete picture frame.

An electronic device that creates an output image brighter than the input (original) image Optical amplifier.

Insertion Loss
The signal strength loss that occurs when a piece of equipment is inserted into a line.

The effective resistance of an electronic circuit to an A.C. signal. The input or output characteristic of a system component that determines the type of transmission cable to be used. The cable used must have the same characteristic impedance as the component. Expressed in ohms. Video distribution has standardized on 75-ohm coaxial and 124-ohm balanced cable.

Image Device (Imager)
The detector in the camera, either a tube or a CCD solid state device.

Image Burn (Retained Image)
A change produced in or on the target of the pickup device witch remains after the removal of a previously stationary light image.

I.S.D.N.(Intergrated Services Digital Network)
Digital phone lines from which allow transmission of via fastscan at speeds of 128Kb/second: used with terminal adapters.

I.R.(Infra Red)
A range of frequencies lower than visible red light used for covert surveillance or as a low cost wireless video link.

Isolation Amplifier
An amplifier with input circuitry and output circuitry designed to eliminate the effects of changes made at either upon the other.

Interline Transfer
A technology of CCD design, where rows of pixels are output from the camera. The sensor's active pixel area and storage register are both contained within the active image area. This differs from "frame transfer" cameras that move all active pixels to a storage register outside of the active area.

Incident Light
The light that falls directly on an object.


This is the device which is used to debugging when developing embedded systems. Also, JTAG is the common name for IEEE 1149.1 which is used as an integrated circuit to develop embedded systems, but it usually refers to the debugger.


It speaks a name of international standardization group which is formed in ISO (International Standards Organization) and subsidiary of ITU-TS (CCITT ; International Telecommunication electro communication standardization center) which propel compression and standardization about restoration of color still picture that JPEG (Joint Photographic Experts Group). JPEG of courses and supports all order refreshing and gradual progress refreshing compaction technique and damage permission compaction technique that is no damage.


User Interface (play(x1,x2,x4,x8), inverse play, stop ) - Button.

Small, rapid variations in a waveform due to mechanical disturbances or to changes in the characteristic of components. Supply voltages, imperfect synchronizing signals, circuits, etc.

key tag

It is a sort of hardware security token which has a built-in entry access control cognition device that gives individuals privileges to access the controlled entry area. As a house or a car key, electronic keys have a role of controlling access of the network services and the information. Electronic keys provide double authentication as other smart cards. The user who wants to be authorized should possess the electronic key and should know the personal identification number (PIN) to prove the ownership of the electronic key.


Kernel is the most important key in the computer operating system which provides a number of basic services for all the other parts of the operating system. In general, kernel has the system of calculating terminated I / O operation, interrupt handlers to handle requests and the scheduler which determines which programs in which order should it share the processing time of the kernel. The core of an operating makes it possible for it to run several programs at once (multitasking), read and write files and connect to networks and peripherals.


It measures the amount of uniform light that falls on one square meter. Security camera specs use the lux to indicate how much light they require to operate, with lower lux levels indicating a camera as more effective in lower ambient light.


A tool used mostly in audio signal processing and speech processing for representing the spectral envelope of a digital signal of speech in compressed form, using the information of a linear predictive model. It is one of the most powerful speech analysis techniques, and one of the most useful methods for encoding good quality speech at a low bit rate and provides extremely accurate estimates of speech parameters.

loop-through cable connector
On the other equipment such as signal lines without affecting the signal to enable the device to switch the monitor is the same one pair of connectors.


Loop is a situation in network routing where packets never reach their destination, but simply cycle repeatedly through a constant series of network nodes.

logical view

In CMS registered devices, Easier to manage the user group is the viewable area.

log out

Logout is terminology that represent discontinuance of device use. After logout, user can not use device.

log in

Login is certification formality to use product. User can use product after it is log.


Log is system used record

live motion

It shows the fuction of showing the movement that occurs in the network image with real time images at once.


It shows the function of sound in the network product from the CMS.

link map

One of the other managed by the connection of the map indicates.
For example, building a map and detailed map of each floor and manage the connection, if the Link map is a map of each floor.


It is the camera configuration of the CMS shown in one screen when the status is being monitored in the split state and the split mode.


It is the time which takes packets from the origin to the destination. Latency and bandwidth determine the speed and performance of the network.

Local Area Network (LAN) establishes the data communication network or connects terminals, computers and printers within the geographically limited areas. These devices can be connected through wired cables or wireless links. LAN and other LAN can be connected and can form WAN connection.


It is the phenomenon which remains after the injection of the object, sometimes causes smear phenomenon (Smearing).

A unit measuring the intensity of light. One foot-candle=10 lux.

Luminance (Y)
The part of a video signal that consists of the monochrome data.

Looping ( Loop Through )
A term indicating that a high impedance device has been permanently connrcted in a parallel to a video source. Individual balanced video outputs for each video input.

Line Lock
To synchronize the field sync pulses, of an AC powered camera, to the frequency of the voltage input (line voltage)

Line Amplifier (Video Line corrector)
A device to make good the loss of signal strength and quality due to long cable runs.

Level Control
Main iris control. Used to set the auto-iris circuit to video level desired by the user. After set-up, the circuit will adjust the iris to maintain this video level in changing lighting conditions. Turning the control towards High will open the iris, towards Low will close the iris.

A transparent optical component that converges light rays to from a two demensional image of that object.

A unit of incident light. It is the illumination on a surface one square foot in area on which a flux of one lumen is uniformly distributed, or the illumination at a surface all points of which are at a distance of one foot from a uniform source of one candela.

Lumen (LM)
The unit of luminous flux. It is equal to the flux through a unit solid angle (steradian) from a uniform point source of one candela or to the flux on a unit surface of which all points are at a unit distance from a uniform point source of one candela.

Low-Frequency Distortion
Distortion effects which occur at low frequencies. In television, generally considered as any frequency below the 15.75-kHz line frequency.

A reduction in signal level or strength, usually expressed in dB. Power dissipation serving no useful purpose.

Electromagnetic radiation detectable by the eye, ranging in wavelength from about 400 to 750 nm.

Lens Speed
Refers to the ability of a lens to transmit light, represented as the ratio of the focal length to the diameter of the lens. A fast lens would be rated f/8. The larger the f number, the slower the lens.

A multiplexer, also known as mux or muldex, is a device that encodes information from two or more data sources (usually a power of two) into a single channel. The multiplexer has a single output, which has the same value as the selected data input. They are used in situations where the cost of implementing separate channels for each data source is more expensive than the cost and inconvenience of providing the multiplexing/demultiplexing functions.


This term refers to the Internet protocol that allows a single IP address (the host) to send a packet to multiple destinations at once with a single, local transmit operation. It also is used in video streaming to enable the broadcasting of video to multiple recipients at once.


measures average time between failure with the modeling assumption that the failed system is not repaired.


MTBF measures the average time that a device works properly without failure; unfortunately, it’s usually measured in hours. An hour measurement does not translate well to the average consumer looking for life expectancy in years.


H.264/AVC/MPEG-4 Part 10 (Advanced Video Coding) is a standard for video compression. The final drafting work on the first version of the standard was completed in May 2003.

MPEG4 frame type

I-frames are the least compressible but don't require other video frames to decode.
P‑frames can use data from previous frames to decompress and are more compressible than I‑frames.
B‑frames can use both previous and forward frames for data reference to get the highest amount of data compression.


MPEG4 has a newer codec and supports 3D content, low bit rate encoding, and support for Digital Rights Management, which controls the use of copyrighted digital work. MPEG4 is used for web streaming media, broadcast television, videophones, and CD distribution. MPEG-4 is widely used in video surveillance, and has recently been improved to the AVC standard.


One of the most common coding standards for internet transferable video images, the MPEG format is playable on nearly all free and payware video players. MPEGs use lossy data compression. MPEGs first predict the initial picture content, and then code differences between that and the copy, as well as any extra information.

motion event

When this movement occurs within the input image is an event that occurred.


Black-and-white video. A video signal that represents the brightness values (luminance) in the picture, but not the color values (chrominance).


when two grids are overlaid at an angle, or when they have slightly different mesh sizes.


use it on CCD camera is recording the lowest possible brightness of the subject.


Feature of a fixed or a zoom lens that indicates the closest distance an object can be from the lens’s image plane, expressed in meters. Zoom lenses have MOD of around 1 m, while fixed lenses usually much less, depending on the focal length.


Motion JPEG is a simple compression/decompression technique for network video. Latency is low and image quality is guaranteed, regardless of movement or complexity of the image. Image quality is controlled by adjusting the compression level, which in turn provides control over the file size, and thereby the bit rate. High-quality individual images from the Motion JPEG stream are easily extracted.

minimum illuminance

The minimum illumination for the camera means. Typically, the camera Minimum Illumination used in the final limit is difficult to capture a few images. Accurate illustration of the camera The minimum illumination higher probability of capture increases.


Mifare is a Philips' cryptography. That means all the exchanges between the card and the reader are enciphered using this proprietary cryptography.

Motion Detection is a feature which can find motion activity on video screen

matrix system

Specified in any order entered the CCTV cameras to monitor the video signal can be output at random. All of each device's built-in communication ports, configuration of equipment have been distributed to each batch control can be in one place.


A logical network configured in a rectangular array of intersections of input/output channels.A logical network configured in a rectangular array of intersections of input/output channels.

master ID

Other users may be used to code the program is the master code.

master / system administrator

All applications relating to the access control system to operate the system operator is privileged.

manual recording

The fuction is 'The Key Record' that can be started to record, stop immediatetely by the record button of the front side or a remote controller, the record order of GUI.

manual iris lens
Typically used in a fixed brightness and to achieve a constant output level, such as e-SHUTTER IRIS separate compensation circuit is needed.

For more detail information, expanding image or time line is magnification.

magnetic stripe card

A magnetic stripe card is a type of card capable of storing data by modifying the magnetism of tiny iron-based magnetic particles on a band of magnetic material on the card.

MAC Address
A MAC address is a unique identifier associated with a piece of networking equipment, or more specifically, its interface with the network. For example, the network card in a computer has its own MAC address.

A multiplexer.

Multiplex (Time Multiplex)
Using one carrier to send more than one signal. In video multiplexers, achieving this by sending a different cameras output in each successive field or frame of a video signal, in a from that can later be retrieved as signal camera pictures.

Having only one color. In television it is black and white.

A device that coverts electronic signals into the video image that was generted by the camera and lens. The picture end of a CCTV system.

To change or vary some parameter such as varying the amplitude of a signal for amplitude modulation or the frequency of a signal for frequency modulation. A Modulator is the curcuit that Modulates the signal.

Minimum Object Distance (M.O.D.)
The closest distance a given lens will be able to focus upon an object. This is measured from the vertex(front) of the lens to the object. Wide angle lenses generally have a smaller M.O.D. than large focal length lenses.

Radio frequencies between 1-30 GHz used for video tranmission over medium/long distance.

Mechanical Focus (Back-Focus, Racking)
The mechanical aligning of the imageing device with the focal point of the lens: most important on zoom lenses to ensure the image stays in focus throughout the zoom range.

Short for Multiple Access Television. The method for distributing RF TV signals by broadcasting them through the air.

Matrix Switcher
Matrix Switcher A switcher able to route any of its camera inputs any of its monitor output: a name usually reserved for large systems, that often includes telemetry control.

manual Iris Lens
A Lens with a manual adjustment to set the iris opening(F stop) in a fixed position. Generally used for fixed lighting applications.

Monochrome Signal
In monochrome television, a signal wave for controlling the brightness values in the picture. In color television, that part of the signal wave which has major control of the brightness values of the picture, whether displayed in color or in monochrome.

Network Camera, such as devices that provide streaming media devices.


Media devices that store and transmit data by network

Functionally similar to a DVR, a NVR also accepts IP camera inputs. NVRs can be software based, making them suitable only for accepting IP camera streams over the Internet.


NVT(Network video Transmitter) receive streaming media from the client program is created.

number of scanning lines

Including the vertical blanking interval of one frame of the screen indicating the number of lines.


National Television System Committee. American committee that set the standards for color television as used today in the US, Canada, Japan and parts of South America. NTSC uses 60fields/sec(30frames/sec) video transmission.


a protocol for synchronizing the clocks of network devices over packet-switched, variable-latency data networks.

normal recording

Recording type which is not by scheduling, but by user activity(command)

In the home of leakage circuit breaker is used for separation.


Network Address Translation (NAT) is a method by which IP addresses are mapped from one group to another, transparent to end users. NAT allows an Internet Protocol (IP) network to maintain public IP addresses separately from private IP addresses. NAT is a popular technology for Internet connection sharing. It is also sometimes used in server load balancing applications on corporate networks.


Network Attached Storage (NAS) is a data storage mechanism that uses special devices connected directly to the network media.


The switch sensor status is not normally contact when the contact of the sensor signal is occurred.


The normal contact of the sensor switch is in operation, run out of contact with the sensor's signal is occurred

Undesired signal(s) that corrupts the original video signal and may reduce image quality.

N/D (Neutral Density)
A filter that attenuates light equally over the whole visible spectrum.

NTSC ( National Television Standards Committee. See E.I.A. )
National Television Systems Committee. American committee that set the standards for colour television as used today in the US, Canada, Japan and parts of South America. NTSC television uses a 3.57945 MHz sub-carrier whose phase varies with the instantaneous hue of the televised colour and whose amplitude varies with the instantaneous saturation of the colour. NTSC employs 525 lines per frame and 59.94 fields per second (usually taken as 60 fields per second).

Non-Composite Video
A video signal containing all information except sync.


When The record process goes on and the HDD capacity is full, The oldest data is overwritten.

output relays

The same electrical circuit or other electrical circuitry affect the behavior of the other devices for opening or closing electrical contacts, the device is electronically controlled.


An image superimposed on a screen picture, commonly used by modern television sets, VCRs, and DVD players to display information such as volume, channel, and time.

operating temperature
The device can operate is the relative operating temperature range.

operating humidity

The device can operate is the humidity range.


ONVIF is an open industry forum for the development of a global standard for the interface of network video products.


Restores focus after the operation of pan/tilt/zoom, and operates the AutoFocus unless the operation of pan/tilt/zoom is uted


OLPF is a optical filter that passes low-frequency signals for removing any effects from high frequency.

A video monitor condition in which the raster extends slightly beyond the physical edges of the CRT screen, cutting off the outer edges of the picture.

The unit of resistance. The electrical resistance between two points of a conductor where a constant difference of potential of 1 Volt applied between these points produces in the conductor a current of 1 Ampere, the conductor not being the source of any electromotive force. It can be represented by the formula V = I x R, where: V = Voltage I = Current R = Resistance.


A device that can be remotely controlled to provide both vertical and horizontal movement for a camera, with zoom.


PSK is a digital modulation scheme that conveys data by changing or modulating the phase of a reference signal

proximity reader

this device possible to recognize card without physical contact,if in distance range of possibe to recognize card


proximity commnication possible to recognize card without physical contact,if in distance range of possibe to recognize card

It means promise dvr send carmera vedio image to pc

progressive scanning

Camera scans all lines of video image.

privacy zone, privacy area

this function is use to purpose to hide specific area for protecting individual privacy

Camera remember the view position, then automatically move to that point by that information

pre event recording

this function is recording the image before occur event


It means assign changeable ip address in dvr to remote place pssible to connet dvr.

power PTZ

Power PTZ is camera ptz control by mouse.

power fail secure

when was stop to supply electrical power, change the security mode. generally It means when was stop to supply electrical power, do not control everything.

power fail safe
when was stop to supply electrical power,it will be a safe state. generally It means when was stop to supply electrical power,unlock everything.

post event recording

this function is recording the image after occur event.


general POS system have a only manage the sales function, but dvr pos have a additional function. Pos Dvr possible to record cctv carmera's vedio images located in store.


It means connect point between DVR and other devices.

pole stand
pole stand is used to support the carmera outdoor.


play recorded video in dvr.


In digital imaging, a pixel is a single point in a raster image. The pixel is the smallest addressable screen element, it is the smallest unit of picture which can be controlled. The intensity of each pixel is variable. In color image systems, a color is typically represented by three or four component intensities such as red, green, and blue, or cyan, magenta, yellow, and black.


A Passive Infrared sensor (PIR sensor) is an electronic device that measures infrared (IR) light radiating from objects in its field of view. PIR sensors are often used in the construction of PIR-based motion detectors. Apparent motion is detected when an infrared source with one temperature, such as a human, passes in front of an infrared source with another temperature, such as a wall.


Picture in Picture (PiP) is a feature of some television receivers and similar devices. One program (channel) is displayed on the full TV screen at the same time as one or more other programs are displayed in inset windows. Sound is usually from the main program only.


Ping is a computer network administration utility used to test whether a particular host is reachable across an Internet Protocol (IP) network and to measure the round-trip time for packets sent from the local host to a destination computer, including the local host's own interfaces.


It means personal identification number such as bank cards

physical view

It means area that view the registerd product of physical connection state in CMS(device,camera,channel,alram,etc)

Pulse-code modulation (PCM) is a digital representation of an analog signal where the magnitude of the signal is sampled regularly at uniform intervals, then quantized to a series of symbols in a numeric (usually binary) code.


A printed circuit board, or PCB, is used to mechanically support and electrically connect electronic components using conductive pathways, tracks or traces etched from copper sheets laminated onto a non-conductive substrate.

pattern, trace

during 2 minutes, User's Manually control activity was memorized by Controller.Throughout this memory,camera repeat automatically working like a memorized movement.


Parallel ATA (PATA) is an interface standard for the connection of storage devices such as hard disks, solid-state drives, floppy drives, and CD-ROM drives in computers. The standard is maintained by X3/INCITS committee[1]. It uses the underlying AT Attachment and AT Attachment Packet Interface (ATA/ATAPI) standards.


A parity bit is a bit that is added to ensure that the number of bits with the value one in a set of bits is even or odd. Parity bits are used as the simplest form of error detecting code.

Parameter is factors which affect the way that something can be done or made.

parallel port

In computing, a parallel port is a parallel communication physical interface. It is also known as a printer port or Centronics port.

DVR in the emergency situation that happened with Panic button that raises the event is an event.

pan tilt drive

A device that can be remotely controlled to provide both vertical and horizontal movement for a camera.


Horizontal movement of camera lens


Phase alternating line. Describes the color phase change in a PAL color signal. PAL is a European color TV system featuring 625 lines per frame, 50 fields per second

The pre-positioning of pan, tilt and zoom cameras by the use of potentiometers in the moving parts of the camera head. These allow the control eqipment to store and move to a set reference point when the controller dictates or when an alarm exists. Special telemetry equipment is required.

Picture element. The smallest cell or area of a CCD chip capable of displaying detail on a screen. The greater the number of pixels, the higher the resolution.

Picture in picture.

Pinhole Lens
Lens used for applications where the camera/lens must be hidden. Front of lens has a small opening to allow the lens to view an entire room through a small hole in a wall.

Automatically switches on the infra-red lights when light levels fall to a preset level.

Phase Adjustable (See Line Lock)
The ability to delay the line locking process, so as to align cameras fed from A.C voltages on different phases.

An optional device that can enhance a CCTV system, for example, a multipler, VCR, photo printer, etc.

The amplitude difference between the most positive and the modt negative excursions of a signal.

A non powered element of a system.

Side-to-side movement of a camera (on a horizontal axis).

PSTN ( Public Switched Telephone Network )
Standard phone lunes used to transmit fastscan pictures via modems.

Phase Alternate (sometimes alternating) Line. Describes the colour phase change in a PAL colour signal. PAL is the European colour encoding TV system featuring 625 lines per frame, 50 fields per second and a 4.43361875 MHz sub- carrier (4.43 MHz). Used mainly in Europe, China, Malaysia, Australia, New Zealand, the Middle East and parts of Africa.

Progressive Scan
The progressive scan format outputs data from the camera (the signal) in sequential order as it is scanned. The scan format produces a full frame of video in a continuous stream, rather than half the image per output sequence in traditional RS-170 CCD cameras. Standard RS-170 video is interlaced and output in two separate fields, generating essentially half the image at a time. With Cohu's new 6600 Series Progressive Scan Camera, a new, full image is output from the camera every 1/60th second, making it ideal for machines to more quickly process and display information, or act according to programmed instructions

Patch Panel
A panel where circuits are terminated and facilities provided for interconnecting between circuits by means of jacks and plugs

Pan/Tilt Preset Positioning
Follower pots are installed on pan/tilt unit to allow feedback to the controller and provides information relevant to horizontal and vertical positioning, allowing the controller to quickly adjust to a pre-selected scene automatically.

Pan and Tilt
A device upon which a camera can be mounted that allows movement in both the azimuth (pan) and in the vertical plane (tilt).

QXGA is a display resolution of 2048×1536 pixels with a 4:3 aspect ratio.


QVGA display with 320 x 240 display resolution. The name comes from having a quarter of the 640 × 480 maximum resolution of the original IBM VGA display technology.


QSXGA is a display resolution of 2560×2048 pixels with a 5:4 aspect ratio.


QoS (Quality of Service) provides network traffic control.

QCIF quality
a resolution of 176X120 like NTSC Source Input Format(PAL's resoulution is 176X144)


CIF defines a video sequence with a resolution of 352 × 288. QCIF means "Quarter CIF". To have one fourth of the area as "quarter" implies the height and width of the frame are halved.

Q1 ~ Q5 quality

video's Quality, Q1 has a best Quality, going to go Q5 more has a bad Quality

A device that compresses up to four video signals and simultaneously displays the images onto one monitor.

Quarter Common Intermediate Format. A videoconferencing format that specifies data rates of 30 frames per second (fps), with each frame containing 144 lines and 176 pixels per line. This is one fourth the resolution of Full CIF. QCIF support is required by the ITU H.261 videoconferencing standard.


RTSP is an application-level Protocol for control over the delivery of data with real-time properties.

RTP provides end-to-end network transport functions suitable for applications transmitting real-time data, such as audio, video, or simulation data, over multicast or unicast network services.

It's one of a operating system in dvr. it's defferent general operating system such as windows xp. it's use to effectively manage camera's video image


RTCP is the control Protocol that works in conjunction with RTP. RTCP control packets are periodically transmitted by each participant in an RTP session to all other participants. Feedback of information to the application can be used to control performance and for diagnostic purposes.


Its use commnicate between dvr and peripheral device(such as controller).controller available to control the carmera's movement by RS-485 commnication style.


Its use commnicate between dvr and peripheral device(such as controller).controller available to control the carmera's movement by rs-232c commnication style.

when watch carmera's vedio image in the remote place.we must be through several this case router is possible to between network and network commnicate.


when devloper design the chip for deal with vedio image,to inprove the excution speed minimize chip function,software deal with complicated work.


Radio Frequency Identification or Radio Frequency Identification tag(s). Uses wireless technology to transmit product serial numbers from tags to a scanner, without human intervention. Regarded as a likely successor to barcode inventory tracking systems.


A frequency at which coherent electromagnetic radiation of energy is useful for communication purposes. Also, the entire range of such frequencies.

revere polarity protection

when electric wire opposite side connect to power supply, do not demage to device and protect them.


A measure of the ability of a camera or television system to reproduce detail. The number of picture elements that can be reproduced with good definition.


All settings are set to initial setting values.


A Repeater is a device that connects networks segments on the physical layer of the network. Related to Repeaters are Bridges, Routers, and Gateways, which also connect network segments, but on different layers of the networking architecture.


A relay is an electrically operated switch. Many relays use an electromagnet to operate a switching mechanism.

register component

It's possible to register on the map. such as camera,sensor,relay,map link function. we call these function a register component. It means register component course on the map by MapEditor Mode.


It means regsitered cms to see the carmera's video image.


It's a small device used to save the live video

record rate

recording image count per second

record quality

It is classify size of recorded image per second by regular unit if more higher Quality more bigger data capacity

read range

It means security card available identifiable distance from installed security card reader in the gate


this method is use a several hard disk to save a lot of vedio image in dvr.


It's a steel case to effectively store several DVRs.

A commonly used computer serial interface.

A loss of vertical sync which causes the picture to move up or down on the TV screen.

A measure of the ability of a camera or television system to reproduce detail. Typically refers to the number of picture elements that can be reproduced with good definition.

Reflected Light
The scene brightness or the light being reflected from a scene.

The rectangular pattern of scanning lines upon which the picture is produced. The illuminated face of the TV monitor without the video information present.

Range Finder
Used to determine the focal lengh needed and what the picture will look like on the monitor. The user looks through the device and adjusts the range finder to the desired picture. Numbers on the outside of the range finder indicate the focal length needed.

Random Interlace
A scanning technique commonly used in CCTV systems in which there is no external control over the scanning process. That is, there is no fixed relationship between adjacent lines and successive fields.

Radio Frequency(R.F.)
Signals with a repetition rate above audible range, but below the frequencies associated 4 With heat and light.

Rack Mount(19" Rack)
An industrial standard housing 19" wide, its height is measured in units(U's) of 1.75".

This is an advanced format of digital communications compared to RS-232. It is a balanced line transmission system. The major improvement over RS422 is in the number of receivers that can be driven with this format, up to 32. It is classically a half duplex 2 wire presentation.

This is an advanced format of digital communication when compared to RS-232. A major difference is that the presentation is balanced line and the signalling is differential. In simple terms, the signal transmitted is read at the receiving end as the difference between the two wires without a reference to earth. So if there is common mode noise induced along the line, it will be cancelled out. RS-422 can drive lines of up to 1200m and distribute data on to up to 10 receivers.

A video coaxial cable with 75 Ohm characteristic impedance. A type of coaxial cable that is most common in use in small to medium-size CCTV systems. It has an outer diameter of approx. 6 mm and it is a good compromise between maximum distances achievable (up to 266m) and good transmission.

Random access memory. Electronic chips, usually known as memory, holding digital information while there is power applied to it. Its capacity is measured in kilobytes. This is the computer's work area.

Read Only Memory. An electronic chip, containing digital information that does not disappear when power is turned off.

Remote control
A transmitting and receiving of signals for controlling remote devices such as pan and tilt units, lens functions, wash and wipe control and similar. It may also refer to the hand held controls for some VCRs and other CCTV equipment.

Redundant array of inexpensive disks. This a technology of connecting a number of hard drives into one mass storage device, which can be used, among other things, for digital recording of video images.

Amplitude variations in the output voltage of a power supply caused by insufficient filtering.
RF (Radio Frequency)
A frequency at which coherent electromagnetic radiation of energy is useful for communication purposes. Also, the entire range of such frequencies.

SXGA is an acronym for Super eXtended Graphics Array referring to a standard monitor resolution of 1280x1024 pixels.


(Network) switch is a device that take the data toward its intended destination. Switch is simpler and faster than hub (Router is more smart than switch to find a network transmission route)


It is an analaog video signal transmitting luminance and color portion seperately.


Super Video Graphics Array is a broad term that covers a wide range of computer display standards. It normally refers to a resolution of 800 × 600 pixels.


A combined binary numeral to distribute IP adresses in the right network system. It is made up by network address distinguishing network and host address distinguishing computer.


A one whole network, but it can be seperated and recognized as a part. Various subnets can gather and make up a interconnected network or internet. A huge network like internet is managed by dividing it to a small network.


It generally means a flow that has continuity . Therefore, it is a flow of a data making a stream transmitting small pieces of pictures, voices, and datas.

stop bit
In asynchronous communications, a bit transmitted after each character.

standalone system

A device that runs independently without the need to be connected with other devices.


Cryptographic protocols that provide security for communications over networks such as the Internet.

SQL server
Database server based from Structured Query Language Server.

SQL is a database computer language designed for managing data in relational database management systems. Its scope includes data query and update, schema creation and modification, and data access control.

spot out
monitoring of specific channel, not main video output

snow noise
Random noise on the display screen, often resulting from dirty heads or weak broadcast video reception.


SNMP is the protocol governing network management and the monitoring of network devices and their functions.


A snapshot is popularly defined as a photograph that is "shot" spontaneously and quickly, most often without artistic or journalistic intent.

SMTP server

when catch intruder by carmera,it send a involved trespass image e-mail. SMTP server use to send this e-mail.

when catch intruder by carmera,it send a involved trespass image e-mail. SMTP use to send this e-mail.

this phenomenon is when keep watch on something in bright place, suddenly appear vertical line on the monitor.

smart card

It is any pocket-sized card with embedded integrated circuits which can process data.


CMS have a registered products. site is available to make a group and perform such as a folder.


It's a round type button to use convenient video search in the dvr or vcr. shuttle button possible search by fast forward or fast rewind and several speed.


In image/video, sharpness is used for the edge contrast(acutance). As sharpness is better, distinction of image is better.


Server is device/software dedicated to the efficient ution of procedures(programs, routines, devices…)

serial port

Serial port is a serial communication physical interface through which information transfers in or out one bit at a time. (contrast parallel port)


It's show video set during particular time fixed in regular sequence by user.


sensor is use to acess control. through sensor detect the disattach door occur alram and view montioring.


In camera's motion detection feature, it is definded the sensitivity of the motion detection. Lower level is the more sensitive.


when was computer programmers delvop something, they use several programs. usually these programs call sdk. sdk usaully visual editer,compiler,linker,and so on.

scroll lock

It is a function that Even if continuously occur event do not move scroll, fix the postion current view screen.

schedule recording

this function is record the image during the given time by the setting.

scanning frequency

scan frequency usually expressed in kilohertz, and therefore describes the number of horizontal lines displayed per second.


The process of moving the electron beam of a pickup tube or a picture tube across the target or screen area of a tube.

scan, group

view in sequence Saved several Preset.


SATA is use transfer path to save recorded vedio image in dvr's hard disk.
Comparing PATA(parallel ATA), SATA reduced cable-bulk and cost, faster and efficient data transfer and hot swapping.


It's to save recorded vedio image, make a network use defferent type data storage.



It means carmera's vedio image loss rate,because external factors.

Abbreviation for synchronization. Electronic pulses that ae inserted into video signal for the purpose of assembling the picture information in the correct position.

A device used to switch the video signal from two or more camera on a monitor.

Spot Filter
A small insert used in a lens to increase the f-stop range of the lens.

Simplex (Multiplexer)
A multiplexer with 1 frame store that can either time multiplex records or show multi-screen pictures in live or play back. It cannot record the multiplexer pictures whilst showing multi- screen pictures.

Sequential Switcher
Sequential switcher is commonly used device in small to medium sized CCTV systems. The sequential switcher altenates the displayed video image from one camera to the next. However, with sequential switching not all cameras can be viewed simultaneously.

A device that indicates a change of state in response to an event or stimulus. See Image Device.

A camera's ability to reproduce a given scene with a given amount of light. Usually expressed on footcandles or lux.

The rapid movement of the election beam in a pickup device of a camera or in the CRT of a television receiver. It is formatted in a line-for-line manner across the photo sensitive surface which produces or reproduces the video picture. When referred to a video surveillance field, it is the panning or the horzontal camera motion

A pan oly unit.

Saturation (Color)
The vividess of a color. I is directly related to the amplitude of the chrominance signal.

S/N Ratio (Signal To Noise Ratio)
Measure of noise levels of a video signal; the higher the number the better.

SVHS (Super Video Home System)
New format high resolution VHS video recorders, capable of giving greatly improved picture if all features are usd. VHS compatible.

Color TV system used in France.

An unwanted side effect of vertical charge transfer in a CCD chip. It shows as vertical white (or sometimes red) stripes in parts of the image where there are very bright highlights. In some modern chip sets smear is minimized to almost undetectable levels.

Standard Minimum Signal
1000 microvolts at 75 ohms (0dB mV) in RF systems; 0.7 Vp-p non-composite, 1Vp-p composite in video systems.

Ability to control the integration (of light) time to the sensor to less than 1/60 second; e.g: stop motion of moving traffic.

TTL(Transistor Transistor Logic)
A term used in digital electronics mainly to describe the ability of a device or circuit to be connected directly to the input or output of digital equipment. Such compatibility eliminates the need for interfacing circuitry. TTL signals are usually limited to two states, low and high, and are thus much more limited than analog signals.

TTL(Time To Live)

Transport packets from the network, not hanging around too long on the router to determine whether the disposal of a packet header field information.

Tracking is camera to detect and trace a moving object.

Tooltips are displayed when you roll over an icon with the mouse pointer. It usually is a small box with explaining what the icon represents.


A common user interface term that refers to any rectangular bar of buttons or icons with a set of related functions.

To alternate back and forth between two states by pressing or clicking the same button.


Providing recorded data information from time base.

time interval

The period of time marked off by or between two events, instants,

time code

It means group of time information in order to use time schedule features set within the equipment.

It is the act to move the camera to spin up and down to expand the surveillance coverage


One area of the camera image is shown in layout of CMS.

termination resistor

Termination resistor is a device to absorb the transfer energy.

Electrical termination of a signal involves providing a terminator at the end of a wire or cable to prevent an RF signal from being reflected back from the end.


This is a point of contact on the circuit board connected from a variety of devices.


In access control, template is data of registerd finger-print.


A protocol for communication between computers, used as a standard for transmitting data over networks and as the basis for standard Internet protocols. The concept is opposite from UDP and guarantees data reception reliability.

Tamper is a plunger switch. set up in encloser, it senses that if opening it or trying to seperate switch from mount.


It is the ability to send network products sound in CMS


A device that has RFID equipped so it can read or save datas.


Permit for certain activity or event at an assigned time.


A function that can manage attendant by using fingerprints or cards.

2 form-C relay

It is relay existing all of COM socket, NC(Normally Close) and (NO)Normally Open.

The angle and speed at which the tape passes the video heads.

Transmission Contorl Protocol / Intenet Protocol

Time lapse video recording
The intermittent recording of video signals at intervals to extend the recording time of the recording medium. It is usually measured when using a 3- hr (180-min) tape.

Time Lapse VCR ( TL-VCR )
A video recorder, most often in VHS format, that can prolong the video recording on a single tape up to 960 hours (this refers to a 180 min tape). This type of VCR is often used in CCTV systems. The principle of operation is very simple - instead of having the video tape travel at a constant speed of just under 24mm/s (which is the case with the domestic models of VHS VCRs), it moves with discrete steps that can be controlled. TL VCRs can have a number of other special functions for use in CCTV systems

Thin-Film-Transistor. This technology is used mainly for manufacturing flat computer and video screens that are superior to the classic LCD screens. Colour quality, fast response time and resolution are excellent for video.

T1 channels
In North America, a digital transmission channel carrying data at a rate of 1.544 Mbps. In Europe, a digital transmission channel carrying data at a rate of 2.048 Mbps.

Signals which exist for a brief period of time prior to the attainment of a steady-state condition. These may include overshoots, damped sinusoidal waves, etc

Test Pattern
A chart especially prepared for checking overall performance of a television system. It contains various combinations of lines and geometric shapes. The camera is focused on the chart, and the pattern is viewed at the monitor for fidelity.

A term used to describe a picture condition in which groups of horizontal lines are displaced in an irregular manner


UXGA is an abbreviation for Ultra eXtended Graphics Array referring to a standard monitor resolution of 1600x1200 pixels, which is exactly quadruple the default resolution of SVGA (800x600). There is a wide screen version, it called WUXGA with 1920x1200 resolution.


UTP cable to create a single twisted pair of copper wires have isolated two. It consists of four pairs of entangled, piled up on the cover without a shield. It is used as nomal telephone line or lan cable.


It is a standard type of connection for many different kinds of devices. Generally, It is used to connect various devices like keyboard, mouse, digital camera, printer.

To serve in Internet we mark an every kind resource, We use the protocol of the back of a http, ftp to a logic address to be standardized. For example,

A device that contains a battery and some circuitry to supply your device with power for a limited time(depending on the battery) if there is any sort of interruption in the outlet power.


A single character encoding scheme which encompasses every character in every language on every platform. It makes it easy to exchange, handle and show texts written in languages all over the world.


Sending packets to a single destination, used in contrast to broadcast or multicast.


The way a person interacts with a computer or electronic device. It comprises the screen menus and icons, keyboard shortcuts, command language. All input devices, such as a mouse, keyboard, touch screen, joy stick are also included.


A protocol which provide simple but unreliable datagram service for communication between computers, the concept is opposite from TCP.


Ultra DMA is a protocol for transferring data between a hard disk drive to the computer's random access memory(RAM). It means that the speed will be faster when the computer boot or start application.

Unshielded Twisted Pair. A cable medium with one or more pairs of twisted insulated copper conductors bound in a single sheath, with no overall or individual screen. Now the most common method of bringing telephone signals and data to the desktop.

Decreases raster size in both H and V so that all four edges of the picture are visible on the monitor.

Uninterruptible Power Supply. These are power supplies used in the majority of high security systems, whose purpose is to back-up the system when the mains power fails. The duration of this depends on the size of the UPS, usually expressed in output VA (or kVA), and the hold up time expected from fully charged batteries. There are two common types, "off line" and "on line". Off line uses a switch to change from mains to battery operation, thus there can be a short break in the output. On Line UPSs are a type where the convertor is always working, hence there is no switch over break at the ouput.


Very-large-scale integration ('VLSI) is the process of creating integrated circuits by combining thousands of transistor-based circuits into a single chip.


This does not come in the state of the video(image) inputs. Video input line cut or the camera is turned off, etc. This means that the state does not transmit video.

visible light

Electromagnetic spectrum in the frequency range from 380 to 780. It is the human eye can see the range of light.

view tree
A tree view or an outline view is a graphical user interface element that presents a hierarchical view of information. Each item (often called a branch or a node) can have a number of subitems. This is often visualized by indentation in a list.

video type auto iris lens

An Auto Iris Lens is a lens in which the aperture automatically opens or closes to maintain proper light levels on the security camera sensor.

video server

video server converts analog video signals into network video streams.

video loss
This does not come in the state of the video(image) inputs. Video input line cut or the camera is turned off, etc. This means that the state does not transmit video.

video decoder

A video decoder is a device which does the reverse of an encoder. It converts digital signal to analog signal.

video encoder

(Security device) video encoder converts analog video signal to digital video signal. Output data (digital video signal) is for network transferring or saving to digital storage.

Video Graphics Array (VGA) is a standard monitor of analog type.
VGA was the last graphical standard introduced by IBM that the majority of PC clone manufacturers conformed to, making it today (as of 2010[update]) the lowest common denominator that all PC graphics hardware supports, before a device-specific driver is loaded into the computer.[citation needed] For example, the MS-Windows splash screen appears while the machine is still operating in VGA mode, which is the reason that this screen always appears in reduced resolution and color depth.


Verification means, based on the information provided is to identify individuals. First, Typically, receive Card or ID number since the first entry, than using biometrics, Cards or passwords to verificate.

vari focal lens

Lens with an adjustable focal length, such as 3.5~8mm, 4.5~10mm, 6~12mm.


VDSL is a DSL technology providing faster data transmission (up to 52 Mbps downstream and 16 Mbps upstream). These fast speeds mean that VDSL is capable of supporting high bandwidth applications such as HDTV, as well as telephone services (Voice over IP) and general Internet access.

A lens type that the focal length can be infinitely varied to give the exact image desired. It is similar to a manual zoom lens, except that a varifocal lens cannot be zoom tracked.

Video On Demand. A service that allows users to view whatever program they want whenever they want it with VCR-like control capability such as pause, fast forward and rewind.

Video Motion Detector. A detection device generating an alarm condition in response to a change in the video signal, usually motion, but it can also be change in light. Very difficult to set up for use externally but can be useful in carefully controlled situations. Modern VMD systems can learn the scene and ignore such things as tree and foliage movement.

Virtual Reality. Computer-generated images and audio that are experienced through high-tech display and sensor systems and whose imagery is under the control of a viewer.

Very High Frequency. A signal encompassing frequencies between 30 and 300 MHz. In television, VHF band I uses frequencies between 45 MHz and 67 MHz, and between 180 MHz and 215 MHz for Band III. Band II is reserved for FM radio from 88 MHz to 108 MHz.

Video Distribution Amplifier ( VDA )
A special amplifier for buffering the video signal so that it can be supplied to a number of items of equipment at the same time. Each output will need to be individually terminated at 75 Ohms.

Video Signal (Non-Composite)
The picture signal. A signal containing visual information and horizontal and vertical blanking (see also Composite Video Signal) but not sync.

Video Amplifier
A wideband amplifier used for passing picture signals.

Vertical Resolution
The number of horizontal lines that can be seen in the reproduced image of a television pattern.

wiegand card
Wiegand card technology is a patented technology using embedded ferromagnetic wires strategically positioned to create a unique pattern that generates the identification number. The identification information is readed by Wiegand readers.


Interface is commonly applied to the access RF card reader used access control system. It is widely used in the field of access control. It has difficult to replicate compared to other cards like a magnetic card.

web viewer

User can see the video of DVR without special viewer. Just using Internet Explorer can monitoring&searching the DVR


Weatherproof is lower level performance rather than the waterproof. Completely submersed in the state can not be used. It is able to withstand Flowing water or spray, rain s.

The Wide Dynamic Range(WDR) of a camera function provides clear images even if there are both bright and dark areas at the same time. WDR makes both areas distinctive.


Waterproof describes objects relatively unaffected by water or resisting water passage, or which are covered with a material that resists. Such items may be used in wet environments or under water.

watch dog

WatchDog is the ultimate application for restricting and monitoring the time you or others spend on the computer. Its many security measures completely block unauthorized access.


A wide area network (WAN) is a computer network that covers a broad area (i.e., any network whose communications links cross metropolitan, regional, or national boundaries). This is in contrast with personal area networks (PANs), local area networks (LANs), campus area networks (CANs), or metropolitan area networks (MANs) which are usually limited to a room, building, campus or specific metropolitan area (e.g., a city) respectively. Internet is an example of WAN.

wall mount

This is a horder attached to the wall to attach the other device.

(digital) Watermark

(Digital) watermarking is the process of embedding information into a digital signal in a way that is difficult to remove. The signal may be audio, pictures or video, for example. If the signal is copied, then the information is also carried in the copy. A signal may carry several different watermarks at the same time.

White balance
An electronic process used in video cameras to retain true colours. It is performed electronically and is set on the basis of a white object in the picture.

A particular type of video compression that is especially suitable for CCTV. Offers higher compression ratio with equal or better quality to JPEG.

Wide Area Network.

Today, it iusually means 1024×768 pixels display resolution, but the official definition is broader than that.


The YUV model defines a color space in terms of one luma (Y') and two chrominance (UV) components. The YUV color model is used in the NTSC, PAL, and SECAM composite color video standards.

Y(Y signal, Luma), U(Normalised BY), V(Normalised RY)

YPbPr is a color space used in video electronics. YPBPR is designed for use in analog systems whereas YCBCR is intended for digital video.


YCbCr is a family of color spaces used as a part of the digital photography systems. Y is the luma component and Cb and Cr are the blue-difference and red-difference chroma components.

Y Signal
A signal transmitted in color television containing brightness information. This signal produces a black and white picture on a standard monochrome receiver. In a color picture it supplies fine detail and brightness information.
The ratio of the starting focal length (wide position) to the ending focal length (telephoto position) of a zoom lens. A lens with a 10X zoom ratio will magnify the image at the wide angle end by 10 times when at the telephoto position.

zoom lens

An optical system of continuously variable focal length, the focal plane remaining in a fixed position or aperture.

Zoom Lens
An optical system of continuously variable focal length, the focal plane remaining in a fixed position.

To enlarge or reduce, on a continuously variable basis, the size of a televised image primarily by varying lens focal length.


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