[theora] range coding experiments?

Sergey Kurdakov sergey.forum at gmail.com
Sat Sep 26 21:21:01 PDT 2009



in addition to range coder http://svn.xiph.org/trunk/ghost/libentcode/ there is

schroarith.c in dirac Schrödinger codec which has arithmetic coder

I'm not sure, but still seems that it is relatively easy ( matter of
days, maybe weeks ) to replace current encoder/decoder with minimal
entropy coding  with above mentioned code.

after there is an implementation
  ( not having time to try by myself now though, but I will try
someday if no one will attempt ( even if I miss something ( like
additional effort for range coder )  at least will learn  how it goes
)  it would be possible to compare relative efficiency on real clips.

at least I hope that for custom projects ( in case on no 'quick'
updates to spec ) there will be already free codec which  beats or
ties with  h264 :) as it looks like further steps (probable addition
of mdct etc ) might take year or even more to ratify specs and  to


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