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Method and system for processing voice howling in audio system

A technology of audio system and processing method, applied in voice analysis, telephone structure, instrument, etc., can solve problems such as unsatisfactory effects, and achieve the effect of easy operation and simple implementation

Active Publication Date: 2019-05-07
SHANGHAI SHUGUO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if the adaptive notch filter is used, the normal sound information may be filtered out, and the effect is still unsatisfactory.

Method used

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  • Method and system for processing voice howling in audio system
  • Method and system for processing voice howling in audio system
  • Method and system for processing voice howling in audio system

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Embodiment Construction

[0038] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0039] Based on a lot of experiments and creative work, the applicant found that the human voice has obvious characteristics in the frequency domain: in the low frequency part less than 1000hz, it appears as uniformly distributed bands (such as Figure 5 shown); and the obvious characteristics of the howling signal in the frequency domain: concentrated distribution in a certain frequency range (such as Figure 4 shown); in this case, although the howling signal of a specific frequency can be suppressed by using the traditional howling processing method, in the real-time audio system, the howling sound may change due to the suppression processing, and the howling center frequency will be Continuous transfer, at this time the traditional treatment...

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Abstract

The invention discloses a method and system for processing voice whistlers in an audio system. According to the scheme, through real time processing carried out on voice signals in a frequency domain, whether the signals contain effective signals of human sound is analyzed and checked; when no human acoustical signal is detected, a background may contain a relatively large amount of noise or whistlers. After the signals are removed in the frequency domain, time domain transmission is retrieved. According to the scheme, processing is only carried out when noise or voice whistlers exist, and normal conversation quality will not be affected. Processing is added after a sending end performs sound recording and before a receiving end performs sound playing. The hardware or software design of the existing system will not be affected.

Description

technical field [0001] The invention relates to audio system processing technology, in particular to the processing technology of voice howling in the audio system. Background technique [0002] With the development of digital networks, there have been many mobile phone voice intercom systems: the traditional intercom can be realized very conveniently through mobile phone software. The mobile phone at the sending end obtains the voice signal through the microphone and transmits it to the receiving end through the data network, and the receiving end plays the received sound signal through the speaker, so a basic voice intercom system is formed. However, in practical application, if the call is made indoors or at a close distance, since the speaker at the receiving end continuously emits sound, which is also received by the microphone at the sending end, the self-excitation of the sound is continuously cyclically generated, and a harsh howling sound appears. This howling soun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04M1/19G10L21/0208
CPCG10L21/0208H04M1/19
Inventor 牛国富郑富强薛钢
Owner SHANGHAI SHUGUO TECH CO LTD