[speex-dev] vbr and music

Matthias Granberry matthias at utdallas.edu
Sat Jan 25 04:14:09 PST 2003



I know speex is not supposed to do a great job compressing music, but
I've noticed that the new VBR code chokes completely when you try to
compress horns.  I've placed a particularly offensive example up at
http://www.utdallas.edu/~matthias/ .  Take a look at a-16m*{ogg,spx}.
a.ogg is the first minute of an ogg created from the source media (in
44khz stereo).  The rest have been mixed down to mono and resampled to
16khz.  The fixed-bitrate recording at quality 5 is fairly listenable,
but the VBR encoding drops the bitrate down to where the artifacts
make it almost entirely unlistenable.

-- 
Matthias Granberry
matthias at utdallas.edu
(469) 371-0596
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