[Speex-dev] Visualizing echo

Jean-Marc Valin Jean-Marc.Valin at USherbrooke.ca
Sat Dec 3 21:04:26 PST 2005

> Now, I'd like to do the same for echo cancellation, but there I'm a bit at 
> a loss of what arrays to look at and what values I should expect. Ideally, 
> I'd like something like 'amount of echo in frequency band x at time 
> offset y'.. Any idea of what arrays I should look at?

You could look either at the y signal that gets subtracted from the
input, at the "residual echo estimate" that gets passed to the
preprocessor, or at the leak_estimate variable that says what fraction
of the echo is left (e.g. leak_estimate = 0.1 means 10dB echo


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