James Richard Tyrer wrote:
NO that isn't correct. :-|
Corrected:
4:4:4 means that there is both Cr & Cb chroma for every pixel and no
subsampling
4:2:2 means that the chroma alternates between Cr & Cb for each pixel.
The alternating 2x2 blocks of chroma is 4:2:0.
This is in the Wikipedia:
http://en.wikipedia.org/wiki/Chroma_subsampling
I can't remember it either and refer to that page a lot. :-)
I said that I couldn't remember it. :-D
--
JRT
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