[MPlayer-dev-eng] Re: ccache
Tobias Diedrich
td at sim.uni-hannover.de
Mon Jan 6 01:07:47 CET 2003
After reading the explanation I have to correct myself:
Tobias Diedrich wrote:
> 3)
> The "color interlacing" can happen if an YUV411 Signal is converted to RGB
> or vice versa. You have to use different algorithms for interlaced and
> progressive material. For progressive material the first UV-Line
> contains color information for Y-Line 1+2, for interlaced material it is
> for Y-Line 1+3.
>
> 6)
> PAL vs. NTSC:
> PAL has a slightly higher luma resolution, but a halfed chroma
> resolution because of the Phase Alternating Line Color Encoding.
> IIRC NTSC is information wise comparable to YUV422 while PAL carries
> only as much information as an YUV411 picture...
s/YUV411/YUV420/
For a 4x4 pixel matrix the encodings should be:
YUV444:
0 1 2 3
0 YUV YUV YUV YUV
1 YUV YUV YUV YUV
2 YUV YUV YUV YUV
3 YUV YUV YUV YUV
YUV422:
0 1 2 3
0 YUV Y YUV Y
1 YUV Y YUV Y
2 YUV Y YUV Y
3 YUV Y YUV Y
YUV420:
0 1 2 3
0 YUV Y YUV Y
1 Y Y Y Y
2 YUV Y YUV Y
3 Y Y Y Y
YUV411:
0 1 2 3
0 YUV Y Y Y
1 YUV Y Y Y
2 YUV Y Y Y
3 YUV Y Y Y
--
Tobias PGP: 0x9AC7E0BC
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