Pickup method based on microphone array and pickup device and storage medium

A technology of microphone array and microphone, which is applied in speech analysis and instrumentation, can solve the problems of filter response white noise amplification and performance deterioration, and achieve the effects of low distortion, flat frequency response and small size

Pending Publication Date: 2022-01-04
COLSONIC SUZHOU ELECTRONICS CO LTD
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Problems solved by technology

However, its filter response has the problem of white noise amplification, which makes the system more sensitive to inevitable errors such as self-noise and mismatch of the microphone, and the performance will be extremely deteriorated in practice.

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  • Pickup method based on microphone array and pickup device and storage medium
  • Pickup method based on microphone array and pickup device and storage medium
  • Pickup method based on microphone array and pickup device and storage medium

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Embodiment Construction

[0057] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but are not intended to limit the present invention.

[0058] This embodiment proposes a sound pickup method for a microphone array, which uses a differential design algorithm based on the zero-point energy constraint of the error probability model. This algorithm optimizes the expected value by probabilistically modeling the errors such as the self-noise and mismatch of the microphone. , which can further improve the anti-jamming performance of the algorithm. Such as figure 1 As shown, the sound pickup method includes: step A, determining a microphone array, the microphone array has a plurality of microph...

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Abstract

The invention discloses a pickup method based on a microphone array, a pickup device and a storage medium. The pickup method based on a microphone array comprises the following steps that A, determining the microphone array, providing the microphone array with a plurality of microphone channels, wherein each microphone channel comprises at least one microphone unit; B, establishing an error probability model as follows: representing an actual steering vector; C, constructing an optimal problem of a differential beam design algorithm based on the error probability model; D, solving an optimal solution of the optimal problem to obtain weight vectors of a plurality of microphone channels of the microphone array; and E, adjusting the voice signal collected by the microphone array according to the weight vector, and outputting the optimized voice signal. The pickup method provided by the invention has good anti-interference performance, especially has good directivity at a low-frequency position, and is low in distortion degree.

Description

technical field [0001] The invention belongs to the field of microphone array sound pickup, and relates to a microphone array-based sound pickup method, a sound pickup device and a storage medium. Background technique [0002] In a complex acoustic environment, factors such as background noise, interference, and reverberation will deteriorate the sound pickup performance of the microphone, reduce the clarity and intelligibility of speech, and cause a single microphone to pick up sound that cannot meet daily needs. Compared with the sound pickup effect of a single microphone, the microphone array combined with the beamforming algorithm can enhance the signal from the target direction by fusing the space-time information, suppress the signal gain of the non-target direction, improve the signal-to-noise ratio of the output voice, and improve the voice quality. It is widely used in the fields of speech enhancement and speech recognition. [0003] The differential beamforming de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L21/0216G10L21/0264
CPCG10L21/0216G10L21/0264G10L2021/02166
Inventor 蔡野锋叶超马登永沐永生
Owner COLSONIC SUZHOU ELECTRONICS CO LTD
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