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Single-channel voice enhancement method and system

A speech enhancement, single-channel technology, applied in speech analysis, instruments, etc., to achieve the effect of high speech quality, reduced damage, and good denoising effect

Inactive Publication Date: 2011-08-17
WUXI RES INST OF APPLIED TECH TSINGHUA UNIV +1
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AI Technical Summary

Problems solved by technology

For computer simulation of human hearing characteristics, the existing technology only discloses two-channel speech enhancement methods, and there is no single-channel speech enhancement technology

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Embodiment Construction

[0055] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0056] The speech enhancement technology proposed by the invention adopts one microphone. The schematic diagram of the spatial distribution of single voice acquisition is as follows: figure 1 shown. The single-channel (microphone) wind collects the target sound source and the noise source at the same time, and obtains a noisy speech signal. The collected noise signal is filtered and amplified at first, and then the voice digital signal is obtained through A / D conversion for further processing. The structural block diagram of the voice signal acquisition part is as follows: figure 2 shown. The present invention performs speech enhancement processing on the collected digital speech signal (that is, the noisy speech signal descr...

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Abstract

The invention provides a single-channel voice enhancement method and a single-channel voice enhancement system. The method comprises the following steps of: extracting a noise signal from a noisy voice signal through voice activity detection; respectively performing outer ear, inner ear and middle ear simulation manipulation to the noisy voice signal and the noise signal through peripheral analysis; obtaining energy difference of each time frequency unit of the noisy voice signal and the noise signal subjected from simulation manipulation through feature extraction; generating different masking values to the energy difference of each time frequency unit and weighing the different masking values to obtain a masking processing signal; and rebuilding the voice signal to the masking processing signal and the noisy voice signal subjected from simulation manipulation to obtain a voice enhancement signal. The invention can decrease damage to a target voice signal and realize better denoising effect and keep higher voice quality under the environment with multi noises.

Description

technical field [0001] The present invention relates to the technical field of voice, in particular to a single-channel voice enhancement method and system. Background technique [0002] Speech enhancement technology is applied to voice communication in a noisy environment, which can improve the quality of the call; applied to man-machine dialogue, it can improve the accuracy of recognition. Under various noise environments in people's daily life, people often prefer to obtain voice information after noise reduction processing. Traditional single-channel (microphone) speech enhancement techniques, such as spectral subtraction, Wiener filtering, etc., all estimate the noise amplitude or energy first, and then directly subtract it from the noisy speech. The above method can achieve a certain effect on stationary noise such as white noise. However, for non-stationary noise such as non-target person speaking noise and music noise, it may cause serious speech damage. It can be s...

Claims

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Application Information

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IPC IPC(8): G10L21/02G10L21/0224
Inventor 梁维谦董保帅陈卓胡奎
Owner WUXI RES INST OF APPLIED TECH TSINGHUA UNIV
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