| CCTV Acronym |
Definition |
| |
|
| A/V |
audio / video |
| AVI |
Audio Video Interleave - An audio-video
standard designed by Microsoft. |
| AES |
auto electronic shutter - the ability of
the camera to compensate for moderate light changes in indoor applications
without the use of auto iris lenses. |
| BLC |
back light compensation - a feature on
newer CCD cameras which electronically compensates for high background
lighting to give detail which would normally be silhouetted. |
| CAT5 |
Category 5 (cable) - the type of cable
that is used in networking applications. |
| CCD |
CCTV security cameras produce images using
CMOS or CCD (Charge Couple Device) chips. CCD chips are higher quality and
produce a better image than CMOS. |
| CMOS |
complementary metal oxide semiconductor -
Pronounced see-moss, CMOS is a widely used type of semiconductor. |
| CCTV |
Closed-circuit television |
| DVR |
digital video recorder - a digital video
recorder is basically a computer that converts the incoming (analog)
signal from the cameras to digital, and compresses it, and stores it. The
DVR replaces the function of a multiplexor (or quad or switcher) and a
security VCR. There are many advantages of digital video recorders over
their analog counterparts. |
| FPS |
frames per second - in digital video
applications, refers to the number of video images that can be captured,
displayed, or recorded in a second. Also referred to as the 'frame rate'
or 'refresh rate'. |
| GHZ |
gigahertz |
| JPEG (or JPG) |
Pronounced "jay-peg" and stands for "Joint
Photographic Experts Group" who designed the standard. This is a standard
way of compressing images which works particularily well for photographic
images (as opposed to graphic art). |
| MHZ |
megahertz |
| MPEG (or MPG) |
Pronounced "em-peg" and stands for "Motion
Picture Experts Group" who designed the standard. This is a standard way
of compressing audio and video files. (It's also the technology behind the
now world-famous MP3 music files.) |
| POE |
power over ethernet - an adaptor that
allows you to transmit power to a security camera through CAT5 (aka
ethernet) cable. |
| PTZ |
pan-tilt-zoom - PTZ cameras allow you to
adjust the position ('pan' is side-to-side, 'tilt' is up-and-down) and
focus ('zoom') of the camera using a remote controller. Due to this added
functionality, these cameras tend to cost much more than non-PTZ cameras
|
| RG59 |
An RG-59 is a common coax cable used in
CCTV applications. |
| RCA |
. |
| S/N ratio |
signal to noise ratio; this number
represents how much signal noise the camera can tolerate and still provide
a good picture. The higher the number the better. |
| VCR |
Videocassette recorder; an electronic
device for recording and playing back video images and sound on a
videocassette. |
CCTV Abbreviations
