Chrominance

The color part of a television signal, relating to the hue and saturation but not to the brightness (luminance) of the signal. Thus pure black, gray and white have no chrominance, but any colored signal has both chrominance and luminance. Although imaging equipment registers red, blue and green, television pictures are handled and transmitted as U and V, Cr and Cb, or (R-Y) and (B-Y), which all represent the chrominance information of a signal, and the pure luminance (Y).

See also: YUV, Y,Cr,Cb, Composite