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Double-microphone speech enhancer and speech enhancement method thereof

A technology of speech enhancement and dual microphones, applied in speech analysis, instruments, etc., can solve problems such as room reverberation effects are not considered

Inactive Publication Date: 2012-02-08
AAC ACOUSTIC TECH (SHENZHEN) CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This uses only a signal model of additive noise and does not account for room reverberation effects

Method used

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  • Double-microphone speech enhancer and speech enhancement method thereof
  • Double-microphone speech enhancer and speech enhancement method thereof
  • Double-microphone speech enhancer and speech enhancement method thereof

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Embodiment Construction

[0102] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0103] like Figure 1 to Figure 4 Shown, the speech enhancement device of dual microphone of the present invention comprises:

[0104] The microphone array module is provided with a first microphone and a second microphone for receiving a noisy speech signal in the time domain, and converting the noisy speech signal in the time domain to generate a digital signal through analog-to-digital conversion;

[0105] The time delay compensation module is used to receive the time-domain noisy voice digital signal output by the microphone array module, estimate the relative time delay of the two microphone signals through generalized cross-correlation, and compensate the received signal;

[0106] The cepstrum domain anti-reverberation module is used to receive the time-domain noisy speech signal after delay compensation output by the delay compensation module, a...

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Abstract

The invention provides a double-microphone speech enhancer, which comprises a double-microphone array module, a delay compensation module, a cepstrum field dereverberation module, a speech enhancement processing module and an output module, wherein the cepstrum field dereverberation module has the effect of dereverberation. The invention also provides a speech enhancement method based on the double-microphone speech enhancer. The invention adopts the cepstrum field dereverberation module to carry out beam formation and low-pass filtering, and can effectively eliminate the affection of room reverberation, and meanwhile, by using a speech enhancement algorithm, background noise can be further suppressed.

Description

【Technical field】 [0001] The invention relates to a speech enhancement device and method, in particular to a dual-microphone-based speech enhancement device and method. 【Background technique】 [0002] With the development of communication technology, users' requirements for communication equipment are not only satisfied with calls, but also to be able to provide high-quality call effects, especially the current development of visualization technology, the quality of phone calls is even more important. Improving call quality through various voice enhancement methods has become an indispensable part of communication equipment. [0003] In recent years, the proportion of teleconferencing in people's work has risen sharply, and it has become more and more important. However, in the teleconference room, although the room is quiet and there is not much noise, the reverberation in the room always exists and greatly interferes with the teleconference. Speech enhancement devices in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/02G10L21/0208G10L25/24
Inventor 叶利剑
Owner AAC ACOUSTIC TECH (SHENZHEN) CO LTD
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