[Speex-dev] Problems with Speex echo canceller in 1.1.10

Eric Scott Eric.Scott at keynote.com
Thu Jul 28 07:11:25 PDT 2005


That was my first thought as well.  However, I double checked everything and it wasn't reversed.  I also reversed it to see what would happen.  In that case, the NES came out unchanged.  (This NES was the original FES.)

Any other ideas?  Also, do you know what algorithm is used?

- Eric Scott

> -----Original Message-----
> From: Jean-Marc Valin [mailto:Jean-Marc.Valin at USherbrooke.ca]
> Sent: Wednesday, July 27, 2005 8:43 PM
> To: Eric Scott
> Cc: speex-dev at xiph.org
> Subject: Re: [Speex-dev] Problems with Speex echo canceller in 1.1.10
> Le mercredi 27 juillet 2005 à 12:57 -0700, Eric Scott a écrit :
> > I'm having trouble getting the echo canceller to work and 
> I'm hoping some one can get me started in diagnosing what's 
> going on.  The symptoms I'm seeing are these:
> > 
> > 1. If the NES is silence (i.e., no echo, no speech), the ec 
> puts the FES back into the audio.
> > 2. If the NES is similar to the FES (same speech words), 
> the ec doesn't seem to remove the echo.
> With just this, I can tell that you simply inverted the near 
> and far end
> signals.
> 	Jean-Marc
> -- 
> Jean-Marc Valin <Jean-Marc.Valin at USherbrooke.ca>
> Université de Sherbrooke

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