On 9/7/06, <b class="gmail_sendername">Mathieu Bouchard</b> <<a href="mailto:matju@artengine.ca">matju@artengine.ca</a>> wrote<div><span class="gmail_quote"></span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
BTW, congrats for the first mention of YCbCr in this thread. For anyone<br>who doesn't know, Cb = blue chroma, Cr = red chroma, and those are<br>synonymous with U and V, and also with B-Y and R-Y. Some people insist on<br>
distinguishing YCbCr, YUV and Y(B-Y)(R-Y) to mean slightly different<br>things and may also use apostrophes and stuff, but in the current<br>situation, one can't really expect a consistent notation from person to<br>person.
</blockquote><div><br>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.
<br><br><a href="http://www.poynton.com/papers/YUV_and_luminance_harmful.html">http://www.poynton.com/papers/YUV_and_luminance_harmful.html</a><br></div><br></div><br>