Re [PD] pix_freeframe

[chris clepper]

On 9/7/06, Mathieu Bouchard <matju at 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
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