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Voice enhancement method employing combination of nesting-subarray-based post filtering and spectrum-subtraction

A speech enhancement and sub-array technology, applied in speech analysis, instruments, etc., can solve the problems of high frequency and low frequency bands, inconsistent frequency response performance of speech signals, etc., to avoid enhancement performance degradation, reduce size, and good frequency response Effect

Inactive Publication Date: 2009-06-03
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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AI Technical Summary

Problems solved by technology

[0060] The purpose of the present invention is to solve the problem of inconsistency of the frequency response performance of the uniform array to the wide-band voice signal in the current multi-channel voice enhancement technology, and the traditional voice enhancement method also has the problem that it is difficult to balance the high frequency band and the low frequency band

Method used

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  • Voice enhancement method employing combination of nesting-subarray-based post filtering and spectrum-subtraction
  • Voice enhancement method employing combination of nesting-subarray-based post filtering and spectrum-subtraction
  • Voice enhancement method employing combination of nesting-subarray-based post filtering and spectrum-subtraction

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Embodiment Construction

[0083] The flow chart of the combined speech enhancement method based on post-filtering and spectral subtraction based on nested subarrays is as follows: Figure 5 As shown, it consists of four parts: multi-channel signal acquisition, delay compensation, beamforming, and post-adaptive filtering. The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. This implementation case does not limit the present invention. For those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and changes can also be made, and these improvements and changes should also be regarded as the protection scope of the present invention within.

[0084] This implementation runs safely on an ordinary PC, and the specific configuration is as follows:

[0085] CPU: 2.80GHz

[0086] Memory: 1GHz

[0087] Operating system: Windows XP Professional Edition

[0088] Op...

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Abstract

The invention discloses a voice enhancement method employing a combination of nesting-subarray-based post filtering and spectrum-subtraction and is suitable for indoor environment, comprising the enhancement of multi-channel voice signal in vehicle environment; as the problems of unstable the broadband of the voice signals, the inconsistent frequency response of the microphone-array-based multi-channel voice-enhancement method to the voice signal and the correlation among all-channel noise in actual noise-field environment are considered, by utilizing the microphone array nested by the subarrays with different spacing, the voice signals are collected; and the voice signals formed by subarray beams are divided into a high-frequency section and a low-frequency section, different voice-enhancement algorism are adopted for carrying out the treatment; all the advantages are complementary with each other, thus improving the effect of voice enhancement.

Description

technical field [0001] The present invention relates to the field of computer speech signal processing, more specifically, the present invention relates to a nested subarray-based combined post-filtering and spectral subtraction speech enhancement method, especially suitable for speech signal enhancement in noisy indoor environments. Background technique [0002] Speech Enhancement (Speech Enhancement) technology is to carry out relevant processing on the noisy speech, extract the original speech as pure as possible from it, so as to improve the speech quality of the receiving end, improve the clarity, intelligibility and comfort of the speech, and make it easy for people to accept Or improve the performance of speech processing systems. It is commonly used in automatic speech recognition systems, vehicle-mounted non-handheld phones, multimedia conferences, wireless communications, scene recording, military eavesdropping, hearing aids, and intelligent robots. The research a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/02G10L21/0232G10L25/87
Inventor 邹月娴赵璟万波
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
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