Bandpass
Specific range of frequencies allowed to pass through a device
Bandpass Filter
Filter that passes only a specific band of frequencies
Bandwidth
Range of frequencies in which a specific device will properly operate
Bi-directional audio
Use of sound from both the camera locations and the operator control position. This can be used to listen in to the camera sites and give audible warnings to intruders and trespassers seen on the CCTV pictures.
Bit
Binary Digit. The bit is the smallest unit of data currently used in digital storage and transmission. A single bit is a one or a zero.
Blooming
Defocusing effect that occurs around bright areas of a picture when an increase in brightness occurs.
BNC
Most commonly used video cable connector in CCTV equipment.
The name derives from Bayonet, Neill and Concelman, developers of the connector.
Bridging
When a high impedance video line is paralleled, usually through a switch, to a source of video.
BS8418
British Standard which gives a code of practice for the design and operation of Remotely Monitored Detector- Activated CCTV Systems.
BS8495
British code of practice for digital CCTV recording systems for the purpose of image export to be used as evidence.
Byte
A group of 8 bits.
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