Speech enhancement method

A voice enhancement and voice signal technology, applied in voice analysis, instruments, etc., to achieve good voice enhancement and strong adaptability

Active Publication Date: 2018-12-25
UNIV OF SCI & TECH OF CHINA
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to provide a speech enhancement method for the multi-channel speech signal received by the microphone array, which can still maintain good speech enhancement performance under the condition that directional non-stationary interference and non-directional environmental noise exist simultaneously

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Embodiment Construction

[0014] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0015] The embodiment of the present invention provides a speech enhancement method, which has good speech enhancement performance for both directional non-stationary interference and non-directional environmental noise. The example of the present invention is applicable to the coexistence of multiple interferences and noises, and single interference and single noise are taken as examples for introduction. Such as figure 1 As shown, the method mai...

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Abstract

The invention discloses a speech enhancement method. The speech enhancement method comprises: adopting a training method of a joint dictionary learning method to perform learning to obtain a joint dictionary for clean speech signals, interference and noise; measuring an incident direction of a desired speech signal by using a multiple-signal classification algorithm, adopting an MVDR beamformer toprocess signals received by an array, and enhancing the speech signal in a desired speech direction while suppressing the interference and noise in the undesired speech direction; using the joint dictionary obtained by learning to perform first-order joint sparse representation on an output signal of the MVDR beamformer, designing weight coefficients according to residual components of the sparserepresentation, obtaining the final estimated speech signal, interference and noise, obtaining a mean square meaning based optimal estimation of the speech signal in a form of a Wiener filter, finally restoring the desired speech signal, and realizing speech enhancement. The method can still maintain good speech enhancement performance in the presence of both directional non-stationary interference and non-directional environmental noise.

Description

technical field [0001] The invention relates to the technical field of multi-channel speech noise reduction, in particular to a speech enhancement method. Background technique [0002] Voice is one of the most convenient and natural communication tools for human beings. On the one hand, it eliminates the communication distance between people, and on the other hand, it also improves the efficiency of interaction between humans and machines. However, the ubiquitous noise in the real environment also affects the quality of speech communication to varying degrees. It is particularly important to study effective speech enhancement technology, which has become a hot research topic for scholars in recent decades. [0003] Among the existing speech enhancement algorithms, they can be divided into two categories according to the number of microphones, namely multi-channel speech enhancement algorithms and single-channel speech enhancement algorithms. Among the multi-channel algorith...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0216
CPCG10L21/0216G10L2021/02166
Inventor 叶中付朱媛媛
Owner UNIV OF SCI & TECH OF CHINA
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