[FFmpeg-devel] [PATCH] QCELP postfilter

Daniel G. Taylor dan
Thu Apr 15 19:51:18 CEST 2010

On 04/15/2010 12:29 PM, Ronald S. Bultje wrote:
> Hi,
> On Tue, Apr 13, 2010 at 2:31 PM, Michael Niedermayer<michaelni at gmx.at>  wrote:
>>> Maybe I should try Quicktime Pro instead?
>> a sample from another encoder is a good idea too
> OK, same place, resampled* is the input WAV (from the FLAC, resampled
> using ffmpeg) and the output .3g2 file from Quicktime, and the decoder
> output from Quicktime.
> Then r1-3.wav is the blind files with no, my or reference postfilter.
> http://people.gnome.org/~rbultje/ff/

As discussed via IRC - I'm having a lot of trouble hearing the 
differences between the files. The file r3.wav sounds worst to me, but I 
cannot tell the difference between the others, even when listening to 
one in each ear at the same time. You can hear the difference between 
the compressed files and the original-resampled file, but that's not 
very helpful.

For anybody else wanting to know - you can listen to one in each ear 
using e.g. Audacity and loading the mono tracks, setting the channel to 
100% left or right and hitting play. Load all files and mute/unmute as 
needed to compare everything to everything else.

Take care,
Daniel G. Taylor

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