Echo cancellation method, echo cancellation device, electronic device and readable medium

Abstract

The invention relates to an echo cancellation method, an echo cancellation device, an electronic device and a readable medium. The echo cancellation method includes decomposing a near-end signal and afar-end signal into a low-frequency range, a high-frequency range and a transition range between the low-frequency range and the high-frequency range respectively and then adopting the following method to perform echo cancellation on the near-end signal in the transition range: determining the echo energy according to the ratio of the near-end signal echo cancellation energy to the far-end signalenergy in the adjacent ranges, and performing nonlinear processing on the residual signal after the echo energy cancellation to eliminate the residual echo, so that the echo cancellation effect of the near-end signal in the transition range is improved, and the technical problem that the conventional echo cancellation method cannot balance the performance and quality of the echo cancellation is solved.

Description

technical field [0001] The present application belongs to the technical field of echo cancellation, especially an echo cancellation method, an echo cancellation device, electronic equipment and a readable medium. Background technique [0002] In voice communication, if the voice of the far-end caller released by the speaker is collected by the microphone, an acoustic loop is formed between the speaker and the microphone, which will make the far-end caller hear his own echo, which will seriously affect the call quality. , the near-end signal collected by the microphone needs to undergo echo cancellation to eliminate the sound from the speaker. In the field of echo cancellation, in order to improve the processing performance of echo cancellation (for example, the convergence speed), the sub-band echo cancellation structure is often used, that is, the near-end signal and the far-end signal are decomposed into multiple sub-bands, and then respectively in An echo cancellation al...

AI Technical Summary

Problems solved by technology

This processing method has good processing performance, but the echo cancellation effect in this part of the transition range is poor due to the influence of aliasing signals in the transition range

At present, for the transition range, the oversampling echo cancellation method is generally used to effectively improve the echo cancellation effect of the transition range, but oversampling processing and additional lasers will significantly reduce the processing performance of echo cancellation

[0004] Aiming at the technical problem that the echo cancellation method in the prior art cannot balance the performance and quality of the echo cancellation, there is currently no effective solution

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