Patent ID: 9036816
Filing Date: 2015-05-19
Classification: H04B,H04M

Abstract:
1. A method of performing acoustic echo cancellation, the method comprising: receiving an output signal; determining a frequency-domain representation of the output signal, the frequency-domain representation comprising a plurality of frequency bins; calculating, for a first of the plurality of frequency bins, a frequency-domain estimated echo using the frequency-domain representation of the output signal and a first adaptive filter, wherein the first adaptive filter corresponds to the first frequency bin and comprises a plurality of filter taps; determining a time-domain estimated echo using the frequency-domain estimated echo; receiving a microphone signal comprising an actual echo of the output signal; determining a time-domain error using the time-domain estimated echo and the microphone signal; determining a frequency-domain error representation of the time-domain error; determining a step size; and determining an updated first adaptive filter using the first adaptive filter, the frequency-domain error representation, and the frequency-domain representation of the output signal.