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Voice enhancement method and device using same

A voice enhancement and frequency band technology, applied in voice analysis, instruments, etc., can solve problems such as limited noise reduction effect and voice distortion

Active Publication Date: 2012-05-02
AAC TECH PTE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the noise reduction effect of the spectral subtraction speech enhancement method in the related art is limited, and it will cause great distortion to the speech

Method used

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  • Voice enhancement method and device using same
  • Voice enhancement method and device using same
  • Voice enhancement method and device using same

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Embodiment Construction

[0051] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0052] The main idea of ​​the present invention is to form a speech enhancement device by integrating a speech enhancement method in a dedicated chip, and through the interface data transmission between the chip and the corresponding sound collection device. The noisy speech signal is collected by the sound collection device, and then processed by the chip to obtain a signal with an enhanced signal-to-noise ratio, which is output for secondary use.

[0053] The speech enhancement device provided by the present invention includes: a sound collection device and a chip integrated with the speech enhancement method of the present invention, and the chip is integrated in the sound collection device.

[0054] Such as figure 1 , figure 2 and image 3 Shown, the speech enhancement method of the present invention, it comprises the following steps:

[0055] ...

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Abstract

The invention provides a voice enhancement method. The method comprises the following steps of: judging whether the current frame has pure noise by using a judgment device; if the current frame has pure noise and a plurality of previous frames of the current frame have pure noise, improving frequency domain signals by using a voice enhancement algorithm of an improved spectral subtraction method,otherwise, improving the frequency domain signals by using an enhancement algorithm of a voice generating model; and transforming the processed frequency domain signals to a time domain, performing de-emphasis processing and acquiring output signals. The invention also provides a device using the method. The voice enhancement method greatly improves the attenuation of residual noise, and ensures the voice intelligibility.

Description

【Technical field】 [0001] The invention relates to a voice enhancement method. 【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. However, the spectral subtraction speech enhancement method in the related art has a limited noise reduction effect and will cause large distortion to the speech. [0003] Therefore, it is necessary to study a new speech enhancement method in order to achieve a good noise reduction effect. 【Content of invention】 [0004] The technical problem to be solved by the pres...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L21/02G10L21/0216G10L21/0232
Inventor 叶利剑
Owner AAC TECH PTE LTD
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