Spatial filtering speech enhancement system and method

A technology of spatial filtering and voice enhancement, which is applied in the field of signal processing, can solve the problems of microphone array design and limited application scenarios, and achieve the effects of voice enhancement, limited application scenarios, and high orientation accuracy

Pending Publication Date: 2021-11-26
THE THIRD RES INST OF CHINA ELECTRONICS TECH GRP CORP
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Problems solved by technology

[0003] The present invention provides a spatial filtering speech enhancement system and method based on particle vibration velocity sensor microarray to solve the problem of limited microphone array design and application scenarios in the prior art

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  • Spatial filtering speech enhancement system and method
  • Spatial filtering speech enhancement system and method
  • Spatial filtering speech enhancement system and method

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Embodiment Construction

[0030] The embodiment of the present invention aims at the problems that the existing microphone array is limited by the half-wavelength theory, the larger the number of microphones, the larger the aperture, and the problem of spatial aliasing and high computational complexity, and designs a particle vibration velocity sensor based micro Array spatial filtering speech enhancement system, the system consists of a sound pressure sensitive unit and two two-dimensional particle velocity sensitive units, while the sound pressure sensitive unit measures the sound pressure component in the sound field, the two-dimensional particle placed orthogonally The vibration velocity sensitive unit can measure the vibration velocity component of the space particle synchronously and independently. Practice has proved that the sound source orientation accuracy of this structure is high, and the directivity is not affected by the aperture of the array. The array structure is compact, the aperture c...

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Abstract

The invention discloses a spatial filtering speech enhancement system and method. The system is composed of a sound pressure sensing unit and two two-dimensional particle vibration velocity sensing units. When the sound pressure sensing unit measures a sound pressure component in a sound field, the orthogonally placed two-dimensional particle vibration velocity sensing units can synchronously and independently measure a space particle vibration velocity component. Practice proves that the sound source orientation precision of the system is high, the directivity is not influenced by the aperture of an array, the array structure is compact, the aperture can reach the millimeter level, the system can adapt to various environments and various noises, a certain inhibition effect on room reverberation is achieved, and the voice enhancement effect is achieved. Therefore, the problem that the design and application scenarios of the existing microphone array are limited is effectively solved.

Description

technical field [0001] The present invention relates to the technical field of signal processing, in particular to a system and method for spatial filtering speech enhancement. Background technique [0002] In the process of acquiring voice signals, a single microphone can acquire high-quality voice signals when there is no ambient noise, no room reverberation, and the distance from the sound source is very close. But in fact, various factors such as the position of the sound source and the sound environment are not fixed, which affects the quality of the voice signal picked up by the microphone, thereby reducing the intelligibility of the voice. Based on the limitation of single-microphone sound pickup, the method of voice processing by microphone array is introduced, which improves the quality of sound pickup and promotes the development of voice enhancement technology. Different from single microphones, array microphones are spatially selective. By means of electronic co...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0232G10L21/0216
CPCG10L21/0232G10L21/0216G10L2021/02166
Inventor 王笑楠李光刘云飞周瑜冯杰
Owner THE THIRD RES INST OF CHINA ELECTRONICS TECH GRP CORP
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