dario at sinistro.net
Wed Apr 27 00:02:34 PDT 2005
> > 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
> > 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
> > always present on that PC. The Speex denoiser does an amazing job. :)
I could realize that the denoise preprocessing used with the AGC produces a
very robotic synthetic sound (similar to the samples you've provided).
Sometimes even chopping whole frequencies, making it unintelligible.
When I turn off the denoise preproc, it becomes acceptable.
Are you using denoise the whole time?
Hope it helps,
More information about the Speex-dev