[FFmpeg-devel] [PATCH] QCELP postfilter

Michael Niedermayer michaelni
Tue Apr 13 18:45:23 CEST 2010

On Tue, Apr 13, 2010 at 11:38:36AM -0400, Ronald S. Bultje wrote:
> Hi,
> 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.
> http://people.gnome.org/~rbultje/ff/
> 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.

the flac is 2channel 44khz, the others are 1channel 8khz

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Concerning the gods, I have no means of knowing whether they exist or not
or of what sort they may be, because of the obscurity of the subject, and
the brevity of human life -- Protagoras
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