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YIQ and YUV for TV signals
nHave better compression properties
nLuminance Y encoded using more bits than chrominance values I and Q;
humans more sensitive
to Y than I,Q
nNTSC TV uses luminance
Y; chrominance values I and Q
nLuminance used by black/white TVs
nAll 3 values used by color TVs
nYUV encoding used in some digital video and JPEG and MPEG compression