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Method and device for processing noise

A processing method and processing device technology, applied in the field of communication, can solve problems such as no monitoring noise, achieve the effect of improving processing speed, improving real-time performance, and improving noise processing effect

Active Publication Date: 2018-10-30
深圳市沃特沃德软件技术有限公司
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Problems solved by technology

[0004] The main purpose of the present invention is to provide a noise processing method, which aims to solve the technical problem of dynamically adjusting the smoothing factor for noise removal without monitoring the change of noise in the noise processing of existing voice calls

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  • Method and device for processing noise
  • Method and device for processing noise

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Embodiment Construction

[0062]It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0063] refer to figure 1 , the method for speech enhancement of an embodiment of the present invention, collects speech signal through double microphone speech channel, and each speech channel carries out speech enhancement processing respectively, comprises:

[0064] S1: Obtain the frequency domain signal of the current speech signal.

[0065] In this embodiment, the frequency domain signal refers to the signal data obtained by FFT (Fast Fourier Transformation, discrete Fourier transform) transformation of the time domain signal of the voice signal collected by the dual microphone voice channels. microphone voice channel collection, so the voice signals of the same time domain frame collected by the left and right channels of the double microphones are respectively synchronously processed in the same way, for example...

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Abstract

The invention discloses a method and device for processing noise, wherein the method for processing noise comprises the following steps of: acquiring the frequency domain signal of a current speech signal; dividing the frequency domain signal into a plurality of sub-frequency bands arranged in sequence according to a preset rule; acquiring the power ratio of two non-speech segments adjacent to thecurrent time by voice activation detection in each sub-frequency band; acquiring the corresponding smoothing factor after removing the non-speech segments according to the power ratio; acquiring thecovariance matrix of each frequency band characteristic in each sub-frequency band according to the smoothing factor; carrying out characteristic decomposition according to the covariance matrix to obtain the output weight vector of each sub-frequency band. According to the invention, when the MVDR beam output of each sub-frequency band is calculated through the MVDR algorithm, through tracking the change environment noise in each sub-frequency band, the noise with larger fluctuation is processed by dynamically adjusting the smoothing factor so as to improve the noise processing effect.

Description

technical field [0001] The invention relates to the communication field, in particular to a noise processing method and device. Background technique [0002] The interference of environmental noise in the existing voice communication process is inevitable, and the interference of surrounding environmental noise will cause the communication equipment to finally receive the voice signal polluted by noise, which will affect the quality of the voice signal. Especially in public environments with severe noise such as cars, airplanes, ships, airports, shopping malls, etc., strong background noise seriously affects communication quality, causes users' auditory fatigue, and affects users' daily mood and neural activities. There is an urgent need for noise reduction for voice calls processing to improve speech intelligibility. However, in the existing dual-microphone noise reduction method, the amount of processing in the frequency domain is relatively large, and the effect of enhan...

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Application Information

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IPC IPC(8): G10L21/0208G10L21/0216
CPCG10L21/0208G10L21/0216
Inventor 安黄彬
Owner 深圳市沃特沃德软件技术有限公司
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