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Target voice signal enhancing method based on continuous noise tracking, system and storage medium

A target voice and signal enhancement technology, applied in voice analysis, instruments, etc., can solve problems such as limited performance, achieve quality improvement, and reduce noise residual effects

Inactive Publication Date: 2019-05-28
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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Problems solved by technology

However, the performance of these algorithms is very limited when operating at low SNR especially in non-stationary noise environments

Method used

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  • Target voice signal enhancing method based on continuous noise tracking, system and storage medium
  • Target voice signal enhancing method based on continuous noise tracking, system and storage medium
  • Target voice signal enhancing method based on continuous noise tracking, system and storage medium

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Embodiment Construction

[0018] The invention discloses a target speech signal enhancement method based on continuous noise tracking, which can effectively separate the target source signal from the background noise for the noise in life.

[0019] Such as figure 1 As shown, the framework of the present invention consists of two main parts: a speech estimator and a noise tracker.

[0020] Signal model: We consider an additive signal model, y(n)=x(n)+d(n), where y(n) is a noisy speech signal, and x(n) and d(n) represent pure speech signals respectively and noise signal. The relationship in the time-frequency domain is obtained by using the short-time Fourier transform, Y(l,k)=X(l,k)+D(l,k), where l and k represent the frame number and the index of the frequency point, respectively. The expression form of its polar coordinates is: Y=Re jα ,X=Ae jβ and D=Ne jθ . E{|X(l,k)| 2}=λ x and E{|D(l,k)| 2}=λ d are the variances of speech and noise signals, respectively. from figure 1 We see the main fl...

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Abstract

The invention provides a target voice signal enhancing method based on continuous noise tracking, a system and a storage medium. The target voice signal enhancing method comprises the following steps:1, receiving a voice signal with noise, carrying out framing windowing processing on the voice signal with the noise, and carrying out short-time Fourier transform to obtain a relationship of a time-frequency domain; 2, estimating a noise power spectrum; 3, estimating a voice power spectrum; 4, estimating the voice signal by a voice estimator; 5, carrying out inverse Fourier transform, windowing,and achieving voice recovery by using an overlapping addition technique. The target voice signal enhancing method has the beneficial effects that a target voice signal is effectively separated, a noise residue in the voice signal is greatly reduced, and the quality of a target signal is greatly improved. The method has great significance for application such as automatic voice recognition, recognition on speakers, man-machine conversation interfaces and hearing aids.

Description

technical field [0001] The invention relates to the technical field of speech processing, in particular to a target speech signal enhancement method, system and storage medium based on continuous noise tracking. Background technique [0002] Noise exists everywhere in life, and the purpose of the speech enhancement algorithm is to improve the quality and intelligibility of the target speech signal polluted by noise. Existing speech enhancement algorithms usually use speech activity detectors to estimate the background noise to achieve target signal enhancement, and these algorithms perform well in stationary noise environments and high SNR conditions. However, the performance of these algorithms is very limited when operating at low SNR especially in non-stationary noise environments. Since the noise in life is more complicated, such as cars, trains passing by, and pedestrians talking and chatting will generate various noises, it is very necessary to develop a speech enhanc...

Claims

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Application Information

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IPC IPC(8): G10L21/02G10L21/0272G10L25/03G10L25/45
CPCG10L21/02G10L21/0272G10L25/03G10L25/45
Inventor 张啟权王明江陆云韩宇菲张禄孙凤娇
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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