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Microphone array directional pickup method and microphone array directional pickup system

A microphone array, microphone technology, applied in frequency/direction characteristic devices, sensors, electrical components and other directions to achieve the effect of suppressing noise

Active Publication Date: 2020-11-17
BEIJING UNISOUND INFORMATION TECH +1
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AI Technical Summary

Problems solved by technology

[0004] The present invention provides a microphone array directional sound pickup method and system to solve the problem of obtaining speech in a specific direction in a strong noise environment

Method used

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  • Microphone array directional pickup method and microphone array directional pickup system
  • Microphone array directional pickup method and microphone array directional pickup system
  • Microphone array directional pickup method and microphone array directional pickup system

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Embodiment Construction

[0045] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0046] An embodiment of the present invention provides a microphone array directional pickup method, such as figure 1 As shown, the method performs the following steps:

[0047] Step 1: arranging an in-line microphone array composed of several microphones, the in-line microphone array includes a small-pitch uniform array in the middle and a large-pitch non-uniform array on both sides;

[0048] Step 2: Obtain a preliminary enhanced signal according to the microphone array distributed in-line;

[0049] Step 3: Obtain a noise estimation signal according to the small-pitch uniform array;

[0050] Step 4: Based on the preliminary enhanced signal and the noise estimatio...

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Abstract

The invention provides a microphone array directional pickup method and system, and the method comprises the following steps: 1, arranging a microphone array which consists of a plurality of microphones and is distributed in a linear manner, and enabling the microphone array distributed in the linear manner to comprise a small-spacing uniform array located in the middle and large-spacing non-uniform arrays located at two sides; 2, obtaining a preliminary enhanced signal according to the microphone array in linear distribution; 3, obtaining a noise estimation signal according to the small-spacing uniform array; and step 4, based on the preliminary enhancement signal and the noise estimation signal, obtaining a target signal by adopting an adaptive filtering method. According to the method provided by the invention, more excellent super-directional beam forming is designed through a wider non-uniform array, noise information is effectively acquired by utilizing a differential beam forming technology, and an adaptive filtering technology is combined on the basis of super-directional beam forming, so that noise can be suppressed more effectively.

Description

technical field [0001] The invention relates to the technical field of audio processing, in particular to a microphone array directional sound pickup method and system. Background technique [0002] The current microphone array directional pickup method is mainly to design super-directional beam weights according to the microphone array array, and weight the fixed weights to the microphone receiving signal to obtain an enhanced signal. However, using this microphone array directional pickup method , the main lobe of low-frequency super-directional beamforming is wide, and its noise reduction effect is poor in strong noise environments. [0003] In order to solve the problem of acquiring speech in a specific direction in a strong noise environment, there is an urgent need for a microphone array directional pickup method and system. Contents of the invention [0004] The invention provides a microphone array directional sound pickup method and system, which are used to solv...

Claims

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Application Information

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IPC IPC(8): H04R1/32
CPCH04R1/222H04R1/326
Inventor 丁少为关海欣
Owner BEIJING UNISOUND INFORMATION TECH
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