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Echo cancellation

Question asked by LsH on Nov 11, 2011
Latest reply on Jul 10, 2012 by mfortini

I’m trying the echo cancellation block. I updated to version the 3.5.5 BETA 32-Bit OS version before I started. My hardware is a ADAU1761 with a speaker and microphone connected.

 

The results I get using the NLMS filter block are a bit disappointing. A single sinus signal is at most 6dB attenuated, experiments with noise result mostly in an increase of the output signal.

 

Can someone tell me how to set the alpha and TC configuration parameters. And is there an description of the NLMS filter block. Does it contain a double talk detector and that kind of features, what do I have to add to get a working AEC?

 

Thanks, Lukas

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