VESA :
Video Electronics Standards Association. VESA has issued a number of standards, mostly relating to the function of video peripherals in PC computers.
VHS :
Victor Home System; used by most VCRs as the recording medium.
Video Band :
The frequency band used to transmit a composite video signal.
Videocassette Recorder (VCR) :
A device that accepts signals from a video camera/microphone and records video/audio on magnetic tape in a cassette. The VCR can play back recorded video/audio on a television set or CCTV monitor.
Video Switcher :
Switcher or Sequential Switcher. A device that allows the video signals from multiple cameras to be displayed on a monitor, or recorded on a VCR one at a time in sequence.
Varifocal Lens :
A cctv camera lens whose focal length / viewing angle can be manually adjusted to suit the camera view required.Typical Vari Focal lens lengths are: 2.5mm-10mm, 3.5mm-8mm, 5mm-50mm
Video Splitter :
CCTV device that splits the video signal from a camera (or cameras) so it can be used more than once.
Vertical Interval Switching :
The seamless switch between two cameras, no time is elapsed.
Verification :
Identifying an individual based on some type of provided information. Verification may be done using by methods such as access cards, biometric information, PIN, etc.
Voice Recognition System :
An access control system that verifies a person's identity by comparing previously stored voice recordings key words or phrases with the same key words or phrases spoken at the time access is requested.
