Processing method of small-space echo signal in speech communication

An echo signal and voice communication technology, applied in voice analysis, telephone communication, two-way sound reinforcement telephone system, etc., can solve the problems of sound quality impact and incomplete processing, and achieve real-time modification, strong real-time performance and high flexibility Effect

Active Publication Date: 2019-09-17
FUQING BRANCH OF FUJIAN NORMAL UNIV
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Problems solved by technology

But these treatments will have a certain impact on the sound quality to some extent, or the problem of not being thorough enough

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  • Processing method of small-space echo signal in speech communication
  • Processing method of small-space echo signal in speech communication
  • Processing method of small-space echo signal in speech communication

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[0035] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0037] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combina...

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Abstract

The invention relates to a processing method of a small-space echo signal in speech communication. Firstly, white noise pulse is input indoor according to a used electroacoustic system, standing wave response indoor is fully stimulated, and the indoor impact response is obtained and converted into digital signals; then the order of an indoor acoustic environment AR model is estimated, linear prediction is conducted, transfer function parameters of the indoor acoustic environment AR model are obtained, an indoor AR model transfer function H(z) is built, and an all-pole filter is formed; then a blind source separation algorithm is conducted on a microphone pick-up signal to obtain a voice signal and an echo signal; and finally, echo estimation of a remote voice source signal (circuit obtaining) is built according to the H(z), and then an algorithm structure for judging and removing the echo signal is obtained according to the dependency. Ideal microphone pick-up can be achieved through the processing method of the small-space echo signal in speech communication, and the echo interference of 'double speaking' is eliminated.

Description

technical field [0001] The invention relates to the technical field of indoor acoustic signal processing, in particular to a method for processing echo signals in small spaces in voice communication. Background technique [0002] The indoor acoustic signal used for listening includes two parts of the signal: one is the direct sound transmitted directly from the sound source to the receiving position, which attenuates as the transmission distance increases; the other is the standing wave of the indoor acoustic environment excited by the sound source, which is full of indoors. Therefore, there is often a stronger influence of environmental standing waves (strongly reflected sound) in small spaces than in large spaces. [0003] For the electro-acoustic communication system in the actual listening space, there are often two effects due to the influence of standing waves in the acoustic environment: one is that echo interference is caused when both parties speak at the same time...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0208G10L21/0216G10L21/0264H04M9/08
CPCG10L21/0208G10L21/0216G10L21/0264H04M9/082H04M9/085G10L2021/02082G10L2021/02165
Inventor 陈国钦陈以勤詹仁辉
Owner FUQING BRANCH OF FUJIAN NORMAL UNIV
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