[Speex-dev] tgAudioCodec.zip

[Tom Grandgent]

Jean-Marc,

Ok, I understand.  It's floating point but I don't have a mechanism 
in place yet to capture the source data.  I'll do that, reproduce the 
problem, and put together a minimal sample program that can reproduce 
it given a data file.

Thanks,

Tom

Jean-Marc Valin <Jean-Marc.Valin at USherbrooke.ca> wrote:
> 
> Hi Tom,
> 
> In order to trace the problem, I'd need the original file, the exact
> encoding options and the whether Speex was build for float or
> fixed-point.
> 
> Thanks,
> 
> 	Jean-Marc
> 
> Le mardi 26 avril 2005 à 08:51 -0400, Tom Grandgent a écrit :
> > I have (finally) posted my Speex wrapper classes.  They are at:
> > http://www.grandgent.com/spx/tgAudioCodec.zip
> > 
> > I followed your recommendations and they worked fine with 1.1.0.  
> > However, I'm still having the same problem with 1.1.7 that I had the 
> > last time I tried to upgrade.  I'm using the same code with both versions, 
> > except for calling speex_encode_int instead of speex_encode, and passing 
> > ints to speex_preprocess instead of floats.
> > 
> > What happens is that the encoder gets into a bad state and everything 
> > sounds garbled after that point.  I can restart the decoder, disable 
> > the preprocessor, and the problem still exists, so I think the problem 
> > is related to the encoder.  This problem might happen 2 minutes into a 
> > stream or an hour, it seems random, but it's happened 3 times in about 
> > 2-3 hours of testing, on both a 900MHz Athlon and a 2.8GHz P4.
> > 
> > This time, I've saved the decoder's output.  I'm hoping that if you 
> > listen to it, you might have some idea of the problem.  It sounds like 
> > the low half of the frequency spectrum is somewhat ok, but the high half 
> > is totally messed up, getting 'frozen' on these weird sounds.  (I'm using 
> > wideband 16kHz only.  VBR quality 6, not using Speex's VAD or DTX.)
> > 
> > You can hear the audio go from good to bad at 9 seconds into this clip.  
> > At 32 seconds, I turn off the preprocessor and you can hear the weird 
> > sounds still occurring.  Note that the loud noise is the background noise 
> > always present on that PC.  The Speex denoiser does an amazing job. :)
> > 
> > I've made the audio clip available as WAV (1.4MB), OGG (211KB), 
> > and SPX (75KB).  They all sound pretty much the same:
> > 
> > http://www.grandgent.com/spx/badenc.wav
> > http://www.grandgent.com/spx/badenc.ogg
> > http://www.grandgent.com/spx/badenc.spx
> > 
> > Any ideas would be greatly appreciated...
> > 
> > Tom