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Residual echo suppression method and system

A technology of echo suppression and echo, which is applied in the field of communication, can solve the problems of inaccurate estimation of residual echo and poor effect of residual echo suppression, and achieve the effect of improving the double-talk effect

Active Publication Date: 2015-07-01
LEADCORE TECH
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Problems solved by technology

[0007] The purpose of the present invention is to provide a residual echo suppression method and system to solve the problem that the prior art cannot accurately estimate the residual echo and the residual echo suppression effect is not good

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  • Residual echo suppression method and system
  • Residual echo suppression method and system

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Embodiment Construction

[0029] The residual echo suppression method and system proposed by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0030] Please refer to image 3 , which is a schematic diagram of audio signal processing of a terminal. Such as image 3 As shown, this embodiment includes at least one terminal, a microphone and a speaker. The microphone and the loudspeaker can be integrated into the terminal; there is a DSP or other processor with sufficient processing capacity on the terminal, and the DSP can perform algorithms such as codec and echo cancellation processing. The m...

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Abstract

The invention provides a residual echo suppression method and system, and aims to solve the problem of initial-state echo leakage of an adaptive filter by estimating residual echo according to the relevance between a reference signal and a residual signal at the initial convergence stage of the adaptive filter. The method comprises the following steps: estimating the residual echo once by using estimated echo after the convergence of the adaptive filter; estimating the residual echo once by using the relevance between the reference signal and the residual signal; and estimating and calculating two residual echo suppression gains by using the two residual echoes, and weighting the two gains to obtain a total gain. Through adoption of the residual echo suppression method and system, the double-talk effect is effectively improved.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a residual echo suppression method and system. Background technique [0002] In the voice communication system, acoustic echo cancellation plays the role of the core algorithm, and the quality of echo processing determines the quality of the call. [0003] Please refer to figure 1 , which is a schematic diagram of acoustic echo generation. Such as figure 1 As shown, the acoustic echo (acoustic echo) is that the far-end signal is transmitted to the near-end through the telephone or network, played out through the speaker, and then passed through the space transmission path, picked up by the microphone and sent to the far-end, and the far-end caller finally hears his own sound. [0004] In the prior art, a device for processing acoustic echo is called an acoustic echo canceller (Acoustic Echo Canceller), and the acoustic echo canceller is referred to as echo cancellation ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M9/08
Inventor 张金亮胡江王彦
Owner LEADCORE TECH
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