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Method and system for suppressing residual echo

An echo suppression and echo technology, applied in the field of communication, can solve the problems of inability to accurately estimate residual echo, poor residual echo suppression effect, etc., and achieve the effect of improving the double talk effect.

Active Publication Date: 2017-06-16
LEADCORE TECH
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  • Abstract
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AI Technical Summary

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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  • Method and system for suppressing residual echo
  • Method and system for suppressing residual echo
  • Method and system for suppressing residual echo

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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. like 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 micr...

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Abstract

The present invention provides a method and system for suppressing residual echo, which uses the correlation between a reference signal and a residual signal to estimate the residual echo at the initial stage of adaptive filter convergence, and solves the problem of echo leakage in the initial state of the adaptive filter. After the adaptive filter converges, the estimated echo is used to estimate the residual echo once, and then the correlation between the reference signal and the residual signal is used to estimate the residual echo once, and finally two residual echo suppression gains are calculated by using the residual echo estimation twice, and then the two gains Weighting, to obtain the total gain, effectively improving the effect of double talk.

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. like 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 spatial 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 o...

Claims

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Application Information

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