a) A video system employing luminance and two chroma components directly related to the red and blue components. This professional component video system is used in studios and requires special equipment.

Interface devices are used to link the various component systems, i.e., RGB, Y/C, YUV, and YIQ (A system similar to YUV).

b) A color model used chiefly for video signals in which colors are specified according to their luminance, the Y component, and their hue and saturation, the U and V components. See Hue, Luminance, Saturation. Compare RGB.