[Speex-dev] Speech switching in speakerphone?

Jean-Marc Valin jean-marc.valin at usherbrooke.ca
Thu Jun 25 20:45:30 PDT 2009

> My impression when simulating in matlab is that the noise estimate which is
> based on the residual echo is correlating well with the far-end activity.

Not sure what you mean here.

> The idea would be to use your estimation of the residual echo and noise
> But to modify the calculation of the gain2. This would probably offer 
> a more robust solution since we do not have to rely on the SNR. However 
> we would lose the noise suppression functionality I guess (which probably 
> is ok).

Actually, if you remove the noise suppression, then it will sound
strange when you remove echo, because the noise will suddenly go away at
the same time. This is a bit annoying.

> Are you familiar with any other RES-algorithm that might be more robust
> to weak near-end signals?

Not really. This isn't something I have studied too much to be honest.


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