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A mvdr target sound source directional pickup method for microphone array

A microphone and target technology, applied in positioning, instruments, measuring devices, etc., can solve problems that cannot meet the needs of sound source positioning, achieve high-quality application services, improve receiving effects and efficiency, and improve accuracy

Active Publication Date: 2021-06-01
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] For this reason, the technical problem to be solved by the present invention is that the sound source localization algorithm in the prior art has its own defects, and cannot meet the increasing demand for sound source localization. MVDR target sound source directional pickup method for microphone array

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  • A mvdr target sound source directional pickup method for microphone array
  • A mvdr target sound source directional pickup method for microphone array
  • A mvdr target sound source directional pickup method for microphone array

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Embodiment Construction

[0058]Next, the technical solutions in the embodiments of the present invention will be apparent from the embodiment of the present invention, and it is clearly described, and it is understood that the described embodiments are merely embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, there are all other embodiments obtained without making creative labor without making creative labor premises.

[0059]Such asfigure 1 As shown, it is a preferred embodiment of a MVDR target sound source orientation method for a microphone matrix. In the present invention, the microphone is included in four cells, each of which is a microphone, and the four microphones constitute a square matrix. Directive pickup can be achieved by using four full-to-directional microphones.

[0060]The present invention is used for the MVDR target sound source directional pickup method of the microphone matrix, and specifically includes the steps of:

[0061]Ste...

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Abstract

The invention relates to the field of acoustic signal processing, and aims to provide an MVDR target sound source directional sound pickup method for a microphone square array. This method has a small amount of calculation and high positioning accuracy, and can realize directional collection of multi-target sound sources. The method includes: first, collecting all sound source signals within the preset sound intensity level range, and obtaining the sound source signal observation matrix; second, performing filtering, framing and other processing on the sound source observation matrix and calculating the short-time spectrum; third, using The TDOA method determines the approximate orientation of the target sound source corresponding to the peak position with the smallest delay on the cross-correlation curve; Fourth, within the approximate range of the target sound source, use the MVDR method to determine the exact position of the target sound source; Fifth, according to the exact position of the target sound source Directional collection of target sound source signals; Sixth, when there are two or more target sound sources, repeat steps 3 to 5 at the remaining peak positions of the original cross-correlation curve until all target sound sources are directional picked up. The invention solves the actual requirement of multi-target acoustic signal acquisition.

Description

Technical field[0001]The present invention relates to the field of acoustic signal processing, and more particularly to an MVDR target sound source orientation method for a microphone matrix.Background technique[0002]Microphone Array refers to a system of alignment of the microphone, which means that the spatial characteristics of the sound field are sampled and processed by a certain number of acoustic sensors (generally microphones). Each microphone in the microphone array is called a cell.[0003]The microphone array played a very important role in the processing of speech signals. It has many advantages that a single microphone cannot achieve: First, the microphone array has a broader pickup range; second, the occurrence of the microphone array makes the speech signal processing It is limited to the time domain and frequency domain, and can also process the voice signal according to the spatial coordinates, promote the further development of the sound source positioning algorithm;...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/20
CPCG01S5/20
Inventor 刘若伦张亮朱颖
Owner SHANDONG UNIV