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Discussion Groups | Echo Cancellation | Howling rejection

Technical discussions about echo cancellation and adaptive filtering in general.

  

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Howling rejection - Pierre Audenard - Oct 16 9:49:00 2001



Hello

My aim is to set up a howling detector (and canceller)
I tried an adaptive IIR notch filter (using LMS), but I have still problems with
this system (due to harmonics frequencies, and fixed-point implementation)

I read : "howling rejection, typically done by shifting the frequency of the
signal as it goes through the canceller." (.. through an AEC)
But i didnt find any documents about the way to do that

Can someone tell me about howling rejection, or give me some links ?

Thank you for your help



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