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.