Voice enhancing method

A speech enhancement and speech signal technology, applied in speech analysis, sounding equipment, instruments, etc., can solve problems such as noise residual

Active Publication Date: 2014-01-22
PKU HKUST SHENZHEN HONGKONG INSTITUTION
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Problems solved by technology

[0007] Based on this, it is necessary to provide a speech enhancement method for the problem of residual noise in the traditional speech enhancement method

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Embodiment Construction

[0034] Further description will be given below in conjunction with the accompanying drawings and embodiments.

[0035] like figure 1 As shown, it is a flow chart of the speech enhancement method of an embodiment. The method includes the following steps.

[0036] Step S101: Perform noise reduction processing on the speech signal based on the short-term spectrum amplitude estimation method. Although speech and noise are generally non-stationary random processes, they can be regarded as approximately stationary within the analysis frame length of 10-30 milliseconds. In addition, the human ear is not sensitive to the phase of the speech spectral components. The enhancement method based on short-term spectrum amplitude estimation makes full use of the above two properties, can achieve a better noise reduction effect, and also provides an excellent intermediate speech signal for the subsequent masking process.

[0037] Step S102: Masking the residual noise in the noise-reduced s...

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Abstract

The invention discloses a voice enhancing method, which comprises the following steps that voice signals with noises are subjected to noise reduction processing on the basis of a short-time spectrum amplitude estimation method; residue noise in the voice signals subjected to the noise reduction processing is subjected to shielding processing on the basis of the human ear shielding effect. The invention also discloses a voice enhancing device for realizing the voice enhancing method. Compared with the traditional voice enhancing method, the method and the device have the advantages that the processing step based on the human ear shielding effect is added on the basis of the short-time spectrum amplitude estimation method, so the residue noise can be shielded by the human ear, the problem of noise residue in the traditional voice enhancing method is effectively solved, and the effect of enhancing the voice is reached.

Description

technical field [0001] The invention relates to the technical field of speech signal processing, in particular to a speech enhancement method. Background technique [0002] Speech signals are inevitably polluted by background noise in real life, and the background noise makes the performance of many speech processing systems drop sharply. As a signal processing method, speech enhancement is an efficient way to solve noise pollution. The purpose of speech enhancement is to remove background noise as much as possible and improve the subjective auditory effect of speech on the premise of ensuring speech intelligibility. Traditional speech enhancement algorithms can achieve good results in stationary noise and high SNR environment, however, the enhancement effect in non-stationary noise and low SNR is not satisfactory due to the influence of speech distortion and residual noise. [0003] Although the current speech enhancement has not been completely solved in theory and needs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/02G10L21/0216G10K11/175
Inventor 张勇刘轶
Owner PKU HKUST SHENZHEN HONGKONG INSTITUTION
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