[FFmpeg-devel] [PATCH] QCELP postfilter

Ronald S. Bultje rsbultje
Tue Apr 13 17:38:36 CEST 2010


On Wed, Apr 7, 2010 at 4:42 PM, Michael Niedermayer <michaelni at gmx.at> wrote:
> the problem i have with this is that we dont know if the ffmpeg decoder
> is correct. It feels like building on an unsound foundation.

It's what we have, I'm OK with saying it's incorrect but can't fix
that, at least not now.

> i really would like to start with a qt decoder vs reference decoder vs
> ffmpeg with reference postfilter.
> also a more varied sample, that is female + male voice might be a good
> idea.


There's the source (lossless flac, female voice, counting 1-20 and
on), the converted QCP (using Qualcomm Purevoice software) and the
output of the Qualcomm Purevoice software with that file.

then there's 3 numbered wavs. They are FF decoder with reference, my
or no postfilter. Please rate against the reference decoder and
against each other and tell me which is best.


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