Microphone array sound source spatial real-time location method

A microphone array and real-time positioning technology, which is applied in the voice field, can solve the problems of difficulty in functioning, poor real-time calculation, and voice signal frequency bandwidth, etc., and achieve the effect of improving real-time effect, reducing calculation cost, and low calculation cost

Active Publication Date: 2016-11-09
TSINGHUA UNIV
View PDF4 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] The sound source localization method based on high-resolution spectrum estimation draws on the positioning technology in radar arrays, but radar signals are mostly narrow-band signals, compared with the wide frequency band of voice signals, so the effect of this method is not ideal
[0024] Sound source localization is widely used in human-computer interaction technology, but traditional methods cannot achieve high r

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Microphone array sound source spatial real-time location method
  • Microphone array sound source spatial real-time location method
  • Microphone array sound source spatial real-time location method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0064] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0065] Such as figure 1 As shown, the details of the entire calculation process in the embodiment of the present invention are as follows:

[0066] 1. Determine the spatial position candidate points of all sound sources

[0067] Assuming that the length, width, and height of the space to be searched are X, Y, and Z respectively, and the grid interval is δ, the number of grid points N is:

[0068]

[0069] That is, there are N candidate points for the spatial position of the sound source.

[0070] 2. Calculate arrival delay vector and sampling point difference vector

[0071] Assuming that the microphone array contains m≥4 microphones, the arrival delay vector TDOA from the sound source at s to the microphone array can be obtained s for:

[0072] TDOA s =[τ 1,2,s ,τ 1,3,s ,τ 1,4,s ,τ 2,3,s ,τ 2,4,s ,τ 3,4,s ,...] T (Formula 2)

...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention provides a microphone array sound source spatial real-time location method. A microphone array is used as a signal acquisition and output device. Sound source spatial candidate positions are preliminarily given through the use of a controllable power response-phase transformation method. Preliminary candidate filtering is carried out through prior knowledge. The controllable power response-phase transformation method is used to calculate the controllable power response output of the candidates. A search boundary is re-determined through improved random region shrinkage. The efficiency of the controllable power response-phase transformation method is improved. Finally, the controllable power response of the remaining candidates is calculated. The maximum position is selected as the final sound source estimation position. According to the invention, the method has the advantages of clear sound source positioning principle and good real-time performance; experiments show that the plane positioning error range of the method can be controlled on the order of centimeter; the performance is superior to the performance of methods in the prior art; the method has high operation speed and robustness, and can be applied to intelligent home, intelligent robots and other scenes which need real-time sound source localization.

Description

technical field [0001] The invention belongs to the technical field of speech, and in particular relates to a method for real-time positioning of a microphone array sound source space. Background technique [0002] Speech processing technology usually needs to master the spatial position information of the sound source to provide assistance for interactive technologies such as voiceprint recognition and speech content recognition. For example, when a user has a voice conversation with an intelligent robot, it is usually necessary to determine the spatial position of the person and turn and approach. Even in the dark, the specific location of the user can be determined only based on the voice, and it will automatically approach the speaker, providing the necessary Service and help; In video conferences, it is generally necessary to automatically adjust the conference camera to face the speaker, and to be able to switch between different speakers. [0003] A common device use...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01S5/18
CPCG01S5/18
Inventor 杨毅孙甲松
Owner TSINGHUA UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap