Patent ID: 8462958

Claim:
An apparatus configured to compute filter coefficients for an adaptive filter configured to filter a microphone signal to suppress an echo from a loudspeaker signal, the apparatus comprising: an echo estimator configured to estimate an echo contribution spectrum or an echo power spectrum of the microphone signal; an extractor configured to extract a stationary component signal and a non-stationary component signal from the loudspeaker signal or from a signal derived, based on the estimated echo contribution spectrum or the estimated echo power spectrum of the microphone signal, from the loudspeaker signal; and a computer configured to compute the filter coefficients of the adaptive filter; wherein the computer computes the filter coefficients according to the stationary component signal and the non-stationary component signal extracted from the loudspeaker signal and according to the estimated echo contribution spectrum or the echo power spectrum of the microphone signal; or the computer computes the filter coefficients according to the stationary component signal and the non-stationary component signal extracted from the signal derived from the loudspeaker signal.