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Regional pickup method and system for small microphone array equipment

A microphone array and microphone technology, applied in speech analysis, speech synthesis, frequency/direction characteristic devices, etc., can solve problems such as inability to exert effects, achieve good auditory continuity, save site costs, and improve the quality of remote conferences.

Active Publication Date: 2022-03-25
SUZHOU AUDITORYWORKS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition to traditional beamforming methods, azimuth estimation information or subspace decomposition information can also be used to distinguish different sound sources, but these methods are limited by the microphone array aperture, equipment Due to limitations such as computing power, its actual effect cannot be exerted

Method used

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  • Regional pickup method and system for small microphone array equipment
  • Regional pickup method and system for small microphone array equipment
  • Regional pickup method and system for small microphone array equipment

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Embodiment 2

[0109] Such as figure 2 As shown, this embodiment discloses a regional sound pickup system of a small microphone array device, which includes the following modules:

[0110] The nonlinear multi-beam forming module is used to receive the multi-channel voice input signal of the microphone device, divide the area where the microphone device is located into a sound pickup area and a shielding area, and subdivide the sound pickup area and the shielding area into multiple angles, Perform nonlinear beamforming on the beam at each angle to obtain multiple weight gains corresponding to each frequency point data in the pickup area and shielding area, and multiply each frequency point data by the corresponding multiple weight gains to obtain multiple Beam dataset;

[0111] The pick-up area synthesis module is used to use the area synthesis algorithm to perform area synthesis on the multi-beam data set, to synthesize multiple beams corresponding to each frequency point data, to obtain t...

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Abstract

The invention discloses a regional pickup method for small microphone array equipment, which comprises the following steps of: receiving a multi-channel voice input signal of microphone equipment, and performing nonlinear beam forming to obtain a plurality of weight gains corresponding to each frequency point data in a pickup region and a shielding region; performing region synthesis on the multi-beam data set by using a region synthesis algorithm to obtain a final weight gain of each frequency point; processing the regional beam signal by using a voice activity detection algorithm based on a neural network to obtain a voice signal and a noise signal label; detecting the multi-beam data set and the regional beam signal to obtain a pickup region voice signal and a shielding region voice signal label; according to the tag, the voice signal in the pickup area is enhanced, the signal needing to be shielded is suppressed, and the noise signal is not processed. According to the invention, a high-directivity regional pickup effect can be realized, so that the microphone equipment can pick up sound of a specified region of interest without distortion, and interference sound outside the region is shielded at the same time.

Description

technical field [0001] The present invention relates to the technical field of area pickup, in particular to a method and system for area pickup of a small microphone array device. Background technique [0002] In the remote voice conference scenario, shielding unnecessary interfering sounds in the scenario usually helps to improve the conference quality and make remote communication more convenient. The realization of this function generally requires the combination of a large-scale microphone array with high directivity and a beamforming method to construct a spatial domain filter to selectively shield speech from all directions in space. [0003] However, in the case of a personal remote conference or a small conference room with two or three people, considering portability and economy, usually a large microphone array is not selected, but a small web conference camera, portable microphone, etc. are selected. These small conference devices usually consist of 2-6 micropho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/40G10L21/028G10L21/0208G10L25/87G10L25/30G10L13/02
CPCH04R1/406G10L21/028G10L21/0208G10L25/87G10L25/30G10L13/02
Inventor 胡志强辛鑫
Owner SUZHOU AUDITORYWORKS CO LTD
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