Voice gain control method and computer storage medium

A gain control and voice enhancement technology, applied in voice analysis, instruments, etc., can solve problems such as poor voice noise processing effect, achieve the effect of improving voice call quality and reducing the risk of false amplification

Pending Publication Date: 2021-01-19
FUJIAN STAR NET WISDOM TECH CO LTD
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Problems solved by technology

[0004] For this reason, need to provide a kind of voice gain control method, be used to solve the technical problem that above-mentioned existing voice noise processing effect is not good

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  • Voice gain control method and computer storage medium
  • Voice gain control method and computer storage medium
  • Voice gain control method and computer storage medium

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Embodiment Construction

[0027] In order to explain in detail the technical content, structural features, achieved goals and effects of the technical solution, the following will be described in detail in conjunction with specific embodiments and accompanying drawings.

[0028] The existing AGC algorithm mainly calculates the gain of the current frame through the amplitude characteristics of the speech signal and in combination with the speech signal existence probability (VAD) of the current frame; wherein in the speech signal segment that does not contain human voice, if there is instantaneous noise, Attenuation is performed to avoid false amplification of noise. In a speech signal segment containing human voice, if there is instantaneous noise, it is often difficult to be detected by VAD, and even if it is detected, it is difficult to be suppressed by AGC. The reason is that the duration of instantaneous noise is usually 5-50 ms, and the period is very short. The short-time Fourier transform segmen...

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Abstract

The invention relates to the technical field of voice communication, and discloses a voice gain control method and a computer storage medium, and the method comprises the steps: carrying out the framing and Fourier transform of a voice signal, and obtaining an original amplitude spectrum and an original phase spectrum of a frequency domain signal; preprocessing the original amplitude spectrum through a neural network model, suppressing an instantaneous noise amplitude spectrum component in the original amplitude spectrum, and obtaining a speech enhancement amplitude spectrum; carrying out AGCprocessing and correction processing on the time domain signal, including framing the time domain signal to solve an envelope, and carrying out AGC processing on the envelope to obtain a gain coefficient; and finally, applying a gain coefficient to the time domain signal, and completing gain control over the voice signal. After the preprocessing of a deep learning neural network model, the amplitude of the instantaneous noise is greatly reduced and is far lower than a gain amplification threshold in AGC, the risk that the instantaneous noise is mistakenly amplified by an AGC algorithm can be reduced through gain correction processing, and the voice call quality is improved.

Description

technical field [0001] The invention relates to the technical field of voice calls, in particular to a voice gain control method and a storage medium in voice calls. Background technique [0002] In a conference call, the appearance of transient noise will distract the audience. How to properly deal with the transient noise is a technical problem that needs to be solved urgently in the conference call. In the well-known open source algorithm webrtc, an automatic gain control algorithm (AGC) is used in a conference call. For example, in the invention patent with the application number CN201010181204.1 and the name of a speech noise reduction device, the use of AGC for noise control is disclosed. When the target speech does not exist, the AGC is used to further suppress the noise intensity by reducing the gain. The judgment of the existence probability of the target voice is given by the voice detection unit. Another example is in the invention of application number CN201910...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0208G10L21/0224G10L21/02
CPCG10L21/02G10L21/0208G10L21/0224
Inventor 陈东敏陈荣观薛建清陈玉龙
Owner FUJIAN STAR NET WISDOM TECH CO LTD
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