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Speech enhancement method applied to dual-microphone system

A dual-microphone, speech enhancement technology, which is applied in speech analysis, instruments, sensors, etc., can solve problems such as speech distortion and limited noise reduction effect, and achieve the effects of improved attenuation, excellent performance, and suppression of non-correlated noise

Active Publication Date: 2010-12-15
AAC TECH NANJING
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the traditional single-channel speech enhancement method has limited noise reduction effect and will cause large distortion to the speech

Method used

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  • Speech enhancement method applied to dual-microphone system
  • Speech enhancement method applied to dual-microphone system
  • Speech enhancement method applied to dual-microphone system

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] A method for speech enhancement applied to a dual-microphone system, see figure 1 , the dual microphone system consists of,

[0023] A microphone array module composed of a first microphone and a second microphone;

[0024] A control module for receiving signals sent by the microphone array module and controlling the microphone array;

[0025] A processing module for receiving data sent by the control module;

[0026] An output module for outputting the data output by the processing module after processing;

[0027] Including the following steps:

[0028] Step 1. After the first microphone and the second microphone respectively receive the time-domain noisy speech signals S1 and S2, they are sent to the control module, and the control module performs framing and pre-emphasis processing on the time-domain noisy speech signals S1 and S2 respectively , Transfo...

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Abstract

The invention provides a speech enhancement method applied to a dual-microphone system. The dual-microphone system comprises a microphone array module, a control module, a processing module and an output module, wherein the microphone array module consists of a first microphone and a second microphone; the control module is used for receiving a signal transmitted by the microphone array module and controlling a microphone array; the processing module is used for receiving data transmitted by the control module; and the output module is used for outputting the processed data output by the processing module. The speech enhancement method comprises the following step that: 1, the first microphone and the second microphone receive time domain speech signals with noise (S1) and (S2) and transmit the signals to the control module, and the control module performs framing and pre-emphasis processing on the time domain speech signals with noise (S1) and (S2) and converts the time domain speech signals with noise (S1) and (S2) into frequency domain signals with noise (X1) and (X2) through short-time Fourier transform. Therefore, the attenuation on related noise is improved.

Description

【Technical field】 [0001] The invention relates to a speech enhancement method, in particular to a speech enhancement method applied to a dual-microphone system. 【Background technique】 [0002] Due to the existence of a large amount of environmental noise, the signal-to-noise ratio of the voice signals collected by the microphones of mobile phones and other communication devices is generally not high enough. Especially in high-noise environments such as street cars, it is necessary to increase the volume to make the other party hear clearly. Therefore, it is necessary to improve the signal-to-noise ratio of the input voice and improve the communication quality by means of voice enhancement. [0003] However, the traditional single-channel speech enhancement method has limited noise reduction effect and will cause large distortion to the speech. Using a dual-microphone array, the phase information of speech and noise signals can be introduced to improve the effect of noise su...

Claims

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Application Information

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IPC IPC(8): G10L21/02H04R9/08G10L21/028
Inventor 叶利剑
Owner AAC TECH NANJING
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