[MPlayer-dev-eng] Re: ccache

D Richard Felker III dalias at aerifal.cx
Mon Jan 6 02:19:54 CET 2003


On Mon, Jan 06, 2003 at 01:00:57AM +0100, Tobias Diedrich wrote:
> Attila Kinali wrote:
> 
> > Can someone explain me how those numbers (420, 422, 411) are related
> > to the picture format ? I never could find anything on the net about it.
> 
> IIRC there was an explanation in an older issue of c't magazine...
> Ah, found it (Issue 13/2000, c'tplusrom 1/2000).
> 
> YUVabc
> 
> For a samples of Y b samples of UV in odd lines and c samples of UV in
> even lines.

Hmm, then is the terminology even right? I thought the chroma
components were considered as belonging to the even lines in most
mpeg-type encodings. Or do we have are even/odd sense reversed because
some engineers consider the top (0th) line odd because it's the
"first"?

Rich



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