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Chrominance
The colour portion of a video signal.
Chrominance refers to the colour information in a television picture. Chrominance can be further broken down into two properties of colour: Hue and Saturation.
Chrominance Signal
The high frequency portion of the video signal which is obtained by quadrature amplitude modulation of an (NTSC) 3.58 MHz subcarrier by R-Y and B-Y.
Color Difference Signals
Signals used by colour television systems to convey colour information in such a way that the signals go to zero when there is no colour in the picture. R-Y,B-Y, 1 and Q are all colour difference signals.
References
Kodak: A Concise Glossary for the Non-Technician
The National Film and Sound Archive of Australia acknowledges Australia’s Aboriginal and Torres Strait Islander peoples as the Traditional Custodians of the land on which we work and live and gives respect to their Elders both past and present.