Echo signal processing method and apparatus thereof

Abstract

The invention relates to an echo signal processing method and an apparatus thereof. The method comprises the following steps: acquiring every sub-band energy of an echo signal according to the every sub-band energy of a first reference signal and an estimated adaptive envelope filtering coefficient, wherein the first reference signal is corresponding to a first echo signal of a first microphone signal; acquiring a gain coefficient according to the every sub-band energy of the first microphone signal and the every sub-band energy of the echo signal; adjusting the first microphone signal according to the gain coefficient so as to obtain a microphone signal after eliminating the first echo signal. The apparatus in embodiments of the invention possesses insensitivity to phase. When an echo path changes, correctness of estimation is not affected. Effect of echo signal elimination can be raised.

Description

technical field [0001] Embodiments of the present invention relate to the field of communication technologies, and in particular, to an echo signal processing method and device. Background technique [0002] When making a remote audio call, if the far-end sound is played through the local speaker, the local microphone will not only pick up the sound signal of the speaker at the local end, but also pick up the far-end sound signal played by the speaker and transmit it accordingly. to the far end, at this time the far end will hear its own echo. Therefore, before transmitting the sound signal picked up by the microphone to the remote end, the local end should cancel the far-end echo signal played by the local speaker, so that the remote end will not hear its own voice. [0003] Existing echo cancellation methods use adaptive filtering techniques in the time domain to estimate the parameters of the echo path from the speaker to the microphone, and then eliminate the far-end ec...

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Problems solved by technology

[0004] In the process of implementing the present invention, the inventor found that the prior art has at least the following disadvantages: the method is relatively sensitive to the phase, and when the echo path changes, it is easy to affect the correctness of the echo path parameter estimation results, often resulting in the far-end echo signal No convergence, or only a few decibels of attenuation, the effect of eliminating the far-end echo signal is poor

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