[vorbis-dev] Large codebook?

R.L. Horn eastcheap at yahoo.com
Fri Jun 22 17:38:34 PDT 2001



On Fri, 22 Jun 2001, Juhana Sadeharju wrote:

>>Is this going to give results significantly better than IMA-ADPCM, 

I should think so.  ADPCM compression is pretty poor except where dynamic
range is limited (i.e. telephony).

> Sox could not decode IMA-ADPCM files I have found from one game.

I believe SOX is compatible with Microsoft's notion of IMA ADPCM (which
may or may not be compatible with anything else).

There's another ADPCM implementation (Jack Jansen's) which, again, may or
may not be compatible with anything else (I don't think it's compatible
with anything from M$).  I'll send you source under separate cover.
(Unfortunately, the source I have is at least five years old and I've long
since lost track of where it came from.)

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