A pickup method and device of a microphone array, a storage medium and an electronic device

By using a combination of directional and omnidirectional microphone arrays, along with beamforming, noise reduction, and proportional characteristic value calculation, the problem of traditional microphone arrays being unable to control the pickup distance and direction is solved, resulting in more accurate sound pickup.

CN117041790BActive Publication Date: 2026-07-24HANGZHOU HIKVISION DIGITAL TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HANGZHOU HIKVISION DIGITAL TECHNOLOGY CO LTD
Filing Date
2023-08-31
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Traditional microphone arrays cannot effectively control the pickup distance and direction, resulting in poor pickup performance within a specified direction and distance range, especially when the user is leaning back in a chair and cannot achieve effective pickup.

Method used

A hybrid array including directional and omnidirectional microphones is used to generate a first signal and a second signal through beamforming and noise reduction processing. The proportional characteristic value is calculated to control the pickup distance, and the signal output is fused when the sound source is within a specified range and the signal is suppressed when it is outside the range.

Benefits of technology

It achieves precise control over the pickup angle and distance, improves the accuracy and effectiveness of the pickup signal, ensures signal output from the sound source within the specified range, and suppresses noise outside the range.

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Abstract

The application discloses a pickup method and device of a microphone array, a storage medium and an electronic device, comprising: processing the received signals of all omnidirectional microphones in the microphone array according to the beam coefficients corresponding to the pickup angles to obtain beam signals, and performing beam enhancement on the beam signals to obtain a first signal; performing noise reduction processing on the received signals of all directional microphones in the microphone array to obtain a second signal; calculating a proportional eigenvalue based on the first signal and the second signal; when the proportional eigenvalue is not greater than a first threshold value determined based on a user-indicated pickup distance, calculating a fusion ratio of the first signal and the second signal based on the proportional eigenvalue, and fusing the first signal and the second signal into a pickup signal according to the fusion ratio for output. By applying the application, pickup processing within a limited direction and distance range can be realized, and the accuracy of the pickup signal is improved.
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