Echo suppression

摘要

Method, user device and computer program product for suppressing echo. An audio signal is output from a speaker. A microphone receives an audio signal, wherein the received audio signal includes an echo resulting from the outputted audio signal. A Finite Impulse Response filter estimate ĥ(n) is dynamically adapted in the time domain based on the outputted audio signal and the received audio signal to model an echo path h(n) related to the echo in the received audio signal. The filter estimate ĥ(n) is used in an estimate of the echo power in the received audio signal, and the estimated echo power is used to apply echo suppression to the received audio signal, thereby suppressing the echo in the received audio signal.

主权项

1. A method of suppressing echo, the method comprising:
outputting an audio output signal; receiving an audio input signal, wherein the received audio input signal includes an echo resulting from the outputting the audio output signal; dynamically adapting a Finite Impulse Response filter estimate ĥ(n) in the time domain, based on the audio output signal and the received audio input signal, to model an echo path h(n) of the echo in the received audio input signal; estimating an echo power in the received audio input signal using the filter estimate ĥ(n) and the audio output signal; and suppressing the echo in the received audio input signal based on the estimated echo power.