Method and apparatus for eliminating multichannel acoustic echoes

A multi-channel, acoustic echo cancellation technology, used in interconnection devices, telephone communications, two-way sound reinforcement telephone systems, etc. effect, ease of convergence, effect of reducing correlation

Active Publication Date: 2016-12-07
BAIDU ONLINE NETWORK TECH (BEIJIBG) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in a speech scene with multiple microphones and multiple speakers, there is correlation between the multiple speaker signals, coupled with environmental noise,

Method used

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  • Method and apparatus for eliminating multichannel acoustic echoes
  • Method and apparatus for eliminating multichannel acoustic echoes
  • Method and apparatus for eliminating multichannel acoustic echoes

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Embodiment Construction

[0019] The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. It should also be noted that, for the convenience of description, only the parts related to the related invention are shown in the drawings.

[0020] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0021] figure 1 A flow 100 of an embodiment of the method for eliminating multi-channel acoustic echo according to the present application is shown. The described method for eliminating multi-channel acoustic echo comprises the following steps:

[0022] Step 101, acquire I...

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Abstract

The invention discloses a method and apparatus for eliminating multichannel acoustic echoes. The method comprises the following steps: obtaining I microphone signals and J loudspeaker signals; when the I microphone signals only comprise echo signals, obtaining time delays between echo signals received by a microphone and the J loudspeaker signals; according to the time delays, performing delay compensation on the loudspeaker signals so as to realize alignment with the echo signals in the microphone, and obtaining loudspeaker signals after I*J delay compensation; performing sub-band analysis on the microphone signals to obtain I*N first sub-band signals; performing sub-band analysis on the loudspeaker signals after the delay compensation to obtain I*J*N second sub-band signals; performing acoustic echo elimination on the I*N first sub-band signals in each sub-band by use of the I*J*N second sub-band signals to obtain I*N third sub-band signals after the acoustic echo elimination; and performing sub-band integration on the I*N third sub-band signals to obtain I sound signals after the echoes are eliminated, and such that the effect of eliminating the multichannel acoustic echoes is improved.

Description

technical field [0001] The present application relates to the field of computer technology, specifically to the field of audio processing, and in particular to a method and device for eliminating multi-channel acoustic echo. Background technique [0002] In a speech system, there is usually an echo, and in order to obtain a high-quality speech effect, an acoustic echo cancellation (Acoustic Echo Cancellation, AEC for short) technology may be used to cancel the echo. For example, in the Internet Protocol (Internet Protocol, abbreviated as IP) telephone system, AEC technology is used to eliminate the echo signal during the call; The voice of the speaker; and the use of AEC technology in the smart home system enables smart speakers or robots to obtain commands from the owner while playing music. [0003] The main processing flow of the current AEC technology includes: performing delay compensation on the speaker signal received by the microphone in the sound signal, and then p...

Claims

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Application Information

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IPC IPC(8): H04M9/08G10L21/02
CPCH04M9/082G10L21/02
Inventor 崔玮玮魏建强
Owner BAIDU ONLINE NETWORK TECH (BEIJIBG) CO LTD
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