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A kind of voice signal enhancement method and device

A voice signal and signal parameter technology, applied in voice analysis, instruments, etc., can solve the problems of low output signal-to-noise ratio and failure to consider channel signal correlation, etc., and achieve the effect of improving signal-to-noise ratio

Inactive Publication Date: 2011-12-21
HUAWEI TECH CO LTD
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Problems solved by technology

[0007] In the process of realizing the present invention, the inventors found that in the existing speech enhancement technology of the multi-channel speech enhancement system, the calculation of the weight value of each signal input through multiple channels is independent of the signals input by other channels , does not take into account the correlation of each channel signal, so that the weighted output signal-to-noise ratio is still not high

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  • A kind of voice signal enhancement method and device
  • A kind of voice signal enhancement method and device
  • A kind of voice signal enhancement method and device

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Embodiment Construction

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0020] Embodiments of the present invention will be described below with reference to the accompanying drawings. see figure 2 , is a schematic flowchart of a specific embodiment of the speech signal enhancement method in the present invention. The process includes:

[0021] 201. Obtain a priori signal-to-noise ratio and a posteriori signal-to-noise ratio of each channel of voice signals in the multi-channel voice signal.

[0022] 202. Obtain signal parameters o...

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Abstract

The invention discloses a method and a device for enhancing voice signals. The method comprises: obtaining the prior signal-to-noise ratio (SNR) and the posterior SNR of each voice signal in multiplevoice signals; according to model parameters of the statistic models of the multiple voice signals, obtaining signals parameters of the multiple voice signals; according to the signals parameters as well as the prior SNR and the posterior SNR of each voice signal, obtaining a weighting coefficient of each voice signal which is jointly modeled; using the weighting coefficient of each voice signal to perform weighting to each of the multiple voice signals, so as to obtain weighted multiple voice signals; and combining the weighted multiple voice signals to obtain enhanced voice signals. The technical scheme of the embodiment of the invention fully utilizes relevance among the multiple signals to enhance the SNR of the weighted output signals.

Description

technical field [0001] The invention relates to the field of voice signal processing, in particular to a voice signal enhancement method and device. Background technique [0002] The actual voice communication mostly takes place in a noisy environment. For example, the mobile phone communication in the factory will be affected by the roar of the machine; the voice communication in the train cab will be interfered by the motor running and the sound of the rail collision. In such a noisy environment, in order to obtain as pure original speech as possible from the noisy speech signal, improve the speech quality, improve the clarity and intelligibility of the speech, it is necessary to perform speech signal enhancement processing on the input speech signal. [0003] According to the number of microphones that pick up voice signals, voice enhancement is divided into two types: single-channel and multi-channel. The single-channel speech enhancement system only needs one microphon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L21/02G10L21/0308
Inventor 杨毅张清
Owner HUAWEI TECH CO LTD
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