Suppressing far end audio echo

摘要

Residual frequency components of a reference signal are suppressed from an error signal. A magnitude of the frequency domain representation of the reference signal is divided by a magnitude of the frequency domain representation of least mean squared (LMS) filtered representation of the error signal to obtain a frequency domain ratio of the frequency domain representation of the reference signal to the frequency domain representation of the LMS filtered signal. The frequency domain ratio of the frequency domain representation of the reference signal to the frequency domain representation of the LMS filtered signal is multiplied by the frequency domain ratio of the frequency domain representation of the reference signal to the frequency domain representation of the LMS­ filtered signal, to obtain a frequency domain signal having reduced residual frequency components of the reference signal.