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| author | Michael Niedermayer <michaelni@gmx.at> | 2007-09-10 14:05:13 +0000 |
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| committer | Michael Niedermayer <michaelni@gmx.at> | 2007-09-10 14:05:13 +0000 |
| commit | 8f39b74d77110c0b8510c784177b73adf68da4d8 (patch) | |
| tree | 87c5dc94d26198797da94643c0bc0657b7cf9886 /doc/snow.txt | |
| parent | af74c95a0807832eed19f5450f82c40fc49494fe (diff) | |
| download | ffmpeg-8f39b74d77110c0b8510c784177b73adf68da4d8.tar.gz | |
high level bitstream and decoding process in ascii art
Originally committed as revision 10470 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'doc/snow.txt')
| -rw-r--r-- | doc/snow.txt | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/doc/snow.txt b/doc/snow.txt index 76e1e6501a..a734776e25 100644 --- a/doc/snow.txt +++ b/doc/snow.txt @@ -230,6 +230,68 @@ block_max_depth quant_table quantiztation table + +Highlevel bitstream structure: +============================= + -------------------------------------------- +| Header | + -------------------------------------------- +| ------------------------------------ | +| | Block0 | | +| | split? | | +| | yes no | | +| | ......... intra? | | +| | : Block01 : yes no | | +| | : Block02 : ....... .......... | | +| | : Block03 : : y DC : : ref index: | | +| | : Block04 : : cb DC : : motion x : | | +| | ......... : cr DC : : motion y : | | +| | ....... .......... | | +| ------------------------------------ | +| ------------------------------------ | +| | Block1 | | +| ... | + -------------------------------------------- +| ------------ ------------ ------------ | +|| Y subbands | | Cb subbands| | Cr subbands|| +|| --- --- | | --- --- | | --- --- || +|| |LL0||HL0| | | |LL0||HL0| | | |LL0||HL0| || +|| --- --- | | --- --- | | --- --- || +|| --- --- | | --- --- | | --- --- || +|| |LH0||HH0| | | |LH0||HH0| | | |LH0||HH0| || +|| --- --- | | --- --- | | --- --- || +|| --- --- | | --- --- | | --- --- || +|| |HL1||LH1| | | |HL1||LH1| | | |HL1||LH1| || +|| --- --- | | --- --- | | --- --- || +|| --- --- | | --- --- | | --- --- || +|| |HH1||HL2| | | |HH1||HL2| | | |HH1||HL2| || +|| ... | | ... | | ... || +| ------------ ------------ ------------ | + -------------------------------------------- + +Decoding process: +================= + + ------------ + | | + | Subbands | + ------------ | | + | | ------------ + | Intra DC | | + | | LL0 subband prediction + ------------ | + \ Dequantizaton + ------------------- \ | +| Reference frames | \ IDWT +| ------- ------- | Motion \ | +||Frame 0| |Frame 1|| Compensation . OBMC v ------- +| ------- ------- | --------------. \------> + --->|Frame n|-->output +| ------- ------- | ------- +||Frame 2| |Frame 3||<----------------------------------/ +| ... | + ------------------- + + Range Coder: ============ FIXME |