Glossary of CCTV terms.
AC – alternating current
AES (Auto Electronic Shutter) — Automatic electronic shutter
AGC (Automatic Gain Control) — AGC (automatic gain control)
AI (Auto Iris) — Automatic aperture
Adjust – image settings
Alarm contacts — Alarm sensor connection contacts
Alarm duration — Alarm recording time
Alarm image freeze — Alarm freeze frame
Alarm input — Alarm input
Alarm period — Alarm time
Alarm recording — Alarm recording
Alarm search — Alarm search
ALC (Automatic Light Control) — Automatic adjustment of the intensity of light passing through the lens
ALC (Automatic Level Control) — Adjustment of the auto iris to either “peak” (best rendering of bright areas of the image) or “average” (best rendering of dark areas)
Ambient light level — Main illumination of the monitored area or its background
Angle of view — Viewing angle
Aperture — A characteristic of the lens’s efficiency in relation to the light passing through it
Area — Motion detection zones or masking zones
Aspherical lens — A lens with a non-spherical surface that provides better light transmission
Auto-focus — Automatic focusing of video cameras
Automatic IR cut filter — An automatically switching filter that cuts off the IR region of the spectrum
Automatic gain control — Automatic adjustment of the video signal level
Autopan — Automatic panning
Auto repeat recording — Automatic re-recording
Auto shutter control — Automatic electronic shutter
AWB (Auto White Balance) — Automatic white balance
B
Baud rate — Data transfer rate
Beep — Buzzer sound
BLC (Backlight Compensation) — Backlight compensation
BNC — Connector for 75-Ohm cable (prototype of Russian connector SR50?74F)
BoardLens – miniature lens for frameless video cameras
Bps (bit per second) — Data transfer rate, bit/sec (baud)
Bracket — Bracket
Brightness — Brightness
Buzzer — Buzzer
B/W (Black and White) — Black and white
C
Camera — Video camera
Camera loop back — Through video pass
Camera tour — Order of viewing images of a high-speed video camera
CB_Gain, CR_Gain — tone correction for blue and red channels
CCD (Charge Coupled Device)
CCD disconnect detection
CCIR (Committee Consultatif International des Radiocommunique)
CCIR601
CCTV (Closed Circuit Television)
C-mount
COM
COM
Composite video — Full color video signal
Contrast — Contrast
CRT (Cathode Ray Tube) — Picture tube
CS-Mount — CS lens mount
CS to C mount adaptor — C/CS adapter ring
D
Daylight saving time — Daylight saving time function
Day/Night — «Day/night» (color video camera, automatically switches to black and white display in low light)
DC (Direct Current) — Direct current
DD (Direct Drive) — Control of the auto iris with a direct current signal
DD/MM/YY — Date format: day/month/year
Detection area — Detection area
Dimensions — Overall dimensions
Dome camera — Dome video camera
DSP (Digital signal processing) — Digital signal processing
DVR (Digitalvideorecorder) — Digital video recorder
Dwell time — Monitoring time (for this video camera, before switching to the next one)
E
EIA (Electronics Industry Association) — Standard: 525 lines, 60 fields per second, line frequency of 15734 Hz
ES (Electronic shutter) — Electronic shutter
Event — An event recorded by the access system, a transaction
Event log — Event log
Event recording — Event recording
Exit — exit the menu
Ext. Sync (ExternalSynchronization) — External synchronization
EXview — CCD matrix with increased sensitivity in the visible spectrum and near IR region
F
Factory setting — Factory setting
Fixed focal length lens — Fixed focal length lens
FLK — anti-glare mode to suppress flickering of fluorescent lamps
F-number — Aperture (relative opening)
Focal length — Focal length
Format — CCD matrix size (inch)
fpc (frame per second) — Number of frames per second
Frame — Frame
Freeze — Freeze frame
G
Gamma — Gamma correction
GND — «Ground», body
H
HDD (Hard Disk Drive) — Hard disk drive
Horizontal resolution — Horizontal resolution
Housing — (Thermo) casing
High-resolution camera — High-resolution video camera
Hyper-HAD — High-sensitivity CCD matrix (based on a HAD matrix with microlenses)
I
ID — Identification number (address)
Indoor — For indoor use
Internal sync — Internal synchronization
IR illuminator — IR illuminator
Iris — Aperture
IR light — (IR) infrared radiation
J
JPEG (Joint Photographic Experts Group) — Standard for digital compression of still video images
K
Keyboard — Keyboard
Keypad — Keyboard
L
LAN (Local Area Network) — Network within a building or several buildings
Language — selection of the on-screen menu language
LCD (Liquid Crystal Display) — LCD (liquid crystal display)
LED (Light Emitting Diode) — Light-emitting diode
Lens — Lens
Level — Level, basic adjustment of the lens with auto iris (the automatic iris control system works to it)
Line — TV scan line (for example, 625 lines)
Linux — Operating system (non-commercial version of UNIX)
Live full dwell — Video surveillance time in full-screen format
Live image — Video surveillance
Looping — Video pass-through (parallel connection to the video input connector of the additional connector)
M
Manual iris lens — Lens with manual iris adjustment
Minimum illumination — Minimum illumination, sensitivity
Mirror function — Ability to generate a video signal corresponding to a mirror image (for car rear view video systems)
Module camera — Frameless video camera
Motion — motion detector
Motorized lens, motorized zoom — Vario lens with servo control
M-JPEG (Motion-Joint Picture Expert Group) — Compression in which each frame of a video sequence is stored entirely with JPEG compression
MPEG (Motion Picture Experts Group) — Standard for compression of moving video images (storing only the differences between successive frames)
N
NC (Normal Closed) — Normally closed (contacts)
NO (Normal Opened) — Normally open (contacts)
NTSC (National Television System Committee) — Standard for color video signal
O
On screen set-up menu — On-screen menu
Operating temperature — Operating temperature range
OSD (On Screen Display) — Messages displayed on the screen
Outdoor — Outdoor version
Output — Output
P
PAL (Phase Alternate Line) — Standard for color video signal
Panic record – fast recording mode in DVR
Password — Password
Patrol — The order of viewing images from a high-speed video camera
Pinhole — Lens for hidden installation (with a pupil diameter of less than 1 mm)
PIP (picture in picture) — Picture in picture option
Playback — Playback records
Popup menu — Pop-up menu
Power supply — Power supply
Pre-recording function — Recording events that occurred before the alarm
Privacy – masking areas
PSU (PowerSupplyUnit) — Power supply
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