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 said outputted audio signal. A Finite Impulse Response filter estimate ĥ(t) is dynamically adapted in the time domain based on the outputted audio signal and the received audio signal to model an echo path h(t) of the echo in the received audio signal. At least one power response is determined from the filter estimate ĥ(t) and used to estimate the echo power of the echo in the received audio signal. 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 signal; receiving an audio signal, wherein the received audio signal includes an echo resulting from said outputted audio signal; dynamically adapting a Finite Impulse Response filter estimate ĥ(t) in the time domain based on the outputted audio signal and the received audio signal to model an echo path h(t) of the echo in the received audio signal; determining at least one power response from the filter estimate ĥ(t); using the determined at least one power response to estimate the echo power of the echo in the received audio signal; and using the estimated echo power to apply echo suppression to the received audio signal, thereby suppressing the echo in the received audio signal.