Patent ID: 8155302

Claim:
An acoustic echo cancellation device for canceling an echo in a microphone signal in response to a first input signal and a second input signal, the device comprising: a first combination unit configured to combine the first input signal with the second input signal into an aggregate input signal; an adaptive filter unit configured to filter the aggregate input signal so as to produce an aggregate echo cancellation signal; a second combination unit configured to combine the aggregate echo cancellation signal with the microphone signal so as to produce a residual signal; an additional filter unit configured to filter either the first input signal or the second input signal so as to produce a first partial echo cancellation signal or a second partial echo cancellation signal respectively; and a post-processor unit arranged for substantially suppressing remaining echo components in the residual signal, wherein the post-processor unit configured to use at least one of the first partial echo cancellation signal and the second partial echo cancellation signal to suppress echo components corresponding with the first input signal to a greater extent than echo components corresponding with the second input signal to selectively suppress the echo components based on the first input signal or the second input signal used as input to the additional filter unit.