B
Bandwidth
A measurement of the rate of data transfer, in bits or bytes per second.
Back-porch clamping
During the back-porch interval (between the sync tip and the begin of a video line) of the video signal, also known as "blank level", the DC-restoration circuit maintains the blank level at a constant DC voltage, using a servo-loop that minimizes the error.
Brightness
In NTSC and PAL video signals, the brightness information at any particular instant in a picture is conveyed by the corresponding instantaneous DC level of active video.
Bit
The smallest unit of information, that can be represented either as 1 or 0.
Byte
Consists of 8 bits. Values from 0 to 255, commonly used to represent the gray-scale value of a pixel.