XviD data structure

[redfordxx]

Hi,
is somewhere described (probably yes) how are data stored in XviD data stream. Especially how are the DCT coefficients for one 8x8 block stored. Can someone recommend me?
tnx, R.

[sysKin]

Hi,
is somewhere described (probably yes) how are data stored in XviD data stream. Especially how are the DCT coefficients for one 8x8 block stored. Can someone recommend me?
tnx, R.

There's a three-dimensional array of variable length codes. At one dimension, there's a magnitude of coefficient ("level"). At another, there's a "run" ie number of zeroes before that coefficient. The third dimension is "last" and it's true if it's the last coefficient of the block, false otherwise.

The VLCs are in the mpeg-4p2 standard, it's a large array of data. Larger levels are coded with escape codes to keep the array reasonably small - but they are rare so there's no efficiency penalty.

Does that help?