On 9/7/06, Mathieu Bouchard matju@artengine.ca wrote
BTW, congrats for the first mention of YCbCr in this thread. For anyone who doesn't know, Cb = blue chroma, Cr = red chroma, and those are synonymous with U and V, and also with B-Y and R-Y. Some people insist on distinguishing YCbCr, YUV and Y(B-Y)(R-Y) to mean slightly different things and may also use apostrophes and stuff, but in the current situation, one can't really expect a consistent notation from person to person.
YCbCr is the terminology in CCIR 601 and ITU-R 709 and other digital standards. YUV and YIQ are part of the original PAL and NTSC analog systems which is where confusion can come in - particularly with 601 since it converts from YUV/YIQ analog into YCbCr.
http://www.poynton.com/papers/YUV_and_luminance_harmful.html