Echo suppression method and device

An echo suppression and echo technology, applied in the field of communications, can solve the problems of voice signal distortion, damage to near-end voice signals, near-end speech signal damage, etc., to achieve the effect of suppressing linear and nonlinear acoustic echoes

Active Publication Date: 2017-12-15
CHINA ACAD OF TELECOMM TECH
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Problems solved by technology

This makes the existing monophonic acoustic echo suppressor implemented based on linear adaptive filter unable to effectively eliminate and suppress the acoustic echo of such communication equipment in the hands-free mode
[0004] For the nonlinear characteristics of acoustic echo of communication devices such as mobile phones in the hands-free mode, nonlinear echo suppressors are correspondingly used in some existing technologies, but these technical solutions have relatively low no

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  • Echo suppression method and device
  • Echo suppression method and device

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Embodiment Construction

[0054] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments . Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0055] In order to solve the monophonic echo suppressor implemented based on the linear adaptive filter in the prior art, it cannot effectively deal with the nonlinear characteristics of the acoustic echo of devices with communication functions such as mobile phones and tablet computers in the hands-free calling mode In some existing technologies, although nonlinear adaptive filters such as artificial neural networks are proposed to achieve...

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Abstract

The invention discloses an echo suppression method and device. The echo suppression method comprises the steps of suppressing linear echo component in a first audio signal to obtain a first echo suppression signal; suppressing nonlinear echo component in a second audio signal based on the first echo suppression signal to obtain a second echo suppression signal, wherein the first audio signal and the second audio signal are collected by audio receivers in an audio receiver array; and suppressing the linear echo component and the residual nonlinear echo component in the second echo suppression signal, respectively. The echo suppression method and device can efficiently suppress the linear and nonlinear acoustic echoes.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to an echo suppression method and device. Background technique [0002] For devices with communication functions such as mobile phones and tablet computers, hands-free calling is generally one of the required application features. For the hands-free call mode, the acoustic echo suppression technology is an important technology for improving the call quality, but the real-time change of the acoustic echo brings great technical challenges to the acoustic echo suppression technology. In the prior art, since the adaptive filter has the function of quickly tracking real-time changing signals in an unknown environment, it is usually used in the echo suppression technology to estimate the echo. [0003] Because the speakers on mobile phones and tablets are small and close to the microphone, and the sound from the speaker is usually loud in the hands-free mode, the echo signa...

Claims

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Application Information

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IPC IPC(8): H04M9/08H04R3/02
Inventor 梁民汪法兵沙永涛
Owner CHINA ACAD OF TELECOMM TECH
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