Automatic sound feedback detection and elimination method of real-time communication system

A real-time communication and acoustic feedback technology, applied in voice analysis, instruments, etc., can solve problems such as insufficient accuracy and impact on sound quality, achieve effective acoustic feedback, detect and eliminate acoustic feedback, and improve call quality

Active Publication Date: 2017-02-01
BEIJING RONGLIAN YITONG INFORMATION TECH CO LTD
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Problems solved by technology

[0008] In view of the above analysis, the present invention aims to provide an automatic acoustic feedback detection and elimination method in a real-time communication system to solve the problems of manual intervention, impact on sound quality and insufficient accuracy in the prior art

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  • Automatic sound feedback detection and elimination method of real-time communication system
  • Automatic sound feedback detection and elimination method of real-time communication system

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Embodiment Construction

[0035] Preferred embodiments of the present invention will be specifically described below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and are used together with the embodiments of the present invention to explain the principle of the present invention.

[0036] Embodiments of the present invention provide a method for automatic acoustic feedback detection and elimination in a real-time communication system, such as figure 1 shown, including the following steps:

[0037] a) Collect audio data from the microphone, each frame of audio data contains N_sample sample points, initialize the historical howling estimation information (including the queue of suspicious howling points, the counter queue corresponding to suspicious howling points, and the offset corresponding to suspicious howling points Quantity queue, the corresponding silent counter queue of suspicious howling point); Wherein, N_sample here is g...

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Abstract

The invention relates to an automatic sound feedback detection and elimination method of a real-time communication system. The method is characterized by comprising steps that the audio data is acquired, and the historical squeaking estimation information is initiated; overlapping, windowing and FFT transformation of each frame of audio data are carried out to acquire the transformation data from a time domain to a frequency domain; a peak value power of the frequency domain data and a peak value interval are calculated; traversal of all the peak value information is carried out to acquire the present frame suspected squeaking frequency point information; the historical squeaking estimation information is updated through utilizing the peak value information and the present frame suspected squeaking frequency point information; the updated historical squeaking estimation information is analyzed, and present frame squeaking point determination is accomplished; a corresponding trap filter is generated according to a present frame squeaking point determination result. Through the method, sound feedback can be rapidly, accurately and effectively detected and eliminated, conversation quality is obviously improved, and the method has quite important application values in voice conferences and loudspeaker voice communication.

Description

technical field [0001] The invention relates to the technical field of voice communication, in particular to an automatic acoustic feedback detection and elimination method in a real-time communication system. Background technique [0002] Acoustic feedback is the howling phenomenon caused by part of the sound energy of the speaker being transmitted to the microphone through sound propagation. In the critical state before howling, there will be ringing (that is, the high-frequency tail after the sound stops). Also considered an acoustic feedback phenomenon. [0003] The main reason for howling in the sound reinforcement system is that the sound (signal) of certain frequencies in the system is too strong. When increasing the gain of the microphone channel, because these too strong frequencies first reach the intensity condition required by the acoustic feedback, if the frequency of this frequency If the feedback type is positive feedback, self-excited oscillation will inevit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0208G10L21/0232
CPCG10L21/0208G10L21/0232G10L2021/02082
Inventor 曾国卿
Owner BEIJING RONGLIAN YITONG INFORMATION TECH CO LTD
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