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Method and voice collecting system for speech enhancement

A technology of speech enhancement and sound collection device, applied in speech analysis, instruments, etc., can solve the problems of large area, high cost, and unsatisfactory noise reduction effect.

Inactive Publication Date: 2009-11-18
AAC ACOUSTIC TECH (SHENZHEN) CO LTD +1
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Problems solved by technology

[0003] The amount of calculation and storage space required by the existing related speech enhancement algorithms are relatively large, the requirements for hardware are relatively high, and the area of ​​silicon required when making a dedicated chip is also relatively large, so that the cost is relatively high, and the cost is reduced. The noise effect is not very good

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  • Method and voice collecting system for speech enhancement
  • Method and voice collecting system for speech enhancement
  • Method and voice collecting system for speech enhancement

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the drawings and embodiments.

[0025] The main idea of ​​the present invention is to form a real-time speech enhancement system by integrating a speech enhancement algorithm in a dedicated chip and transmitting data through the interface between the design chip and the corresponding sound acquisition device. The voice signal is collected by the sound collection device, and then directly processed by the voice enhancement algorithm in the chip to obtain the signal with enhanced signal-to-noise ratio, which is output for secondary use.

[0026] The voice-enhanced voice collection system of the present invention includes a voice collection device and a voice signal processing chip, and the chip is integrated in the voice collection device. In this embodiment, the sound collection device is a microphone microphone, and the analog signal collected by the microphone needs to be converted into a digital sig...

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Abstract

The invention provides a method and a voice collecting system for speech enhancement. The system comprises a microphone collecting device and a chip which integrates the method for the speech enhancement. The method for speech enhancement comprises the following steps of: carrying out frame division and pre-emphasis treatment on the noise-contained speech signal so as to be converted to frequency domains; dividing into a plurality of frequency bands; calculating the signal energies of each channel; calculating the estimation value of the posterior signal-to-noise-ratio and the prior signal-to-noise ratio of the current frame; judging whether updating the estimation value of the noise energy; calculating and processing the attenuation factor of each frequency band so as to obtain the speech signal with enhanced signal-to-noise ratio; and converting the processed speech signal into the time domain and outputting the speech signal.

Description

【Technical Field】 [0001] The invention relates to a method for increasing voice and a sound collection system integrating the method. 【Background technique】 [0002] Due to the existence of a large amount of environmental noise, the voice signals collected by sound collection systems, such as microphones, are generally not high enough in signal to noise ratio. In order to collect a voice signal with a high signal-to-noise ratio, usually, a directional microphone is used to collect a voice signal within a certain range, or a voice enhancement method is used to improve the signal-to-noise ratio of the voice signal. [0003] The existing related speech enhancement algorithms require a large amount of calculation and storage space, and require relatively high hardware requirements. The area of ​​silicon required to make a special chip is also relatively large, which makes the cost relatively high and reduces The noise effect is not ideal. [0004] Therefore, it is necessary to study ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/02G10L21/0216
Inventor 叶利剑
Owner AAC ACOUSTIC TECH (SHENZHEN) CO LTD
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