Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A multi-sound source tracking method for suppressing the main sound source

A multi-sound source and main sound source technology, applied in the field of multi-sound source tracking, can solve problems such as loss and difficulty in tracking sound sources, and achieve the effect of maintaining independence

Active Publication Date: 2022-03-08
JIUJIANG VOCATIONAL & TECHN COLLEGE
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if the sound source distance increases again, it is difficult for the traditional tracking algorithm to track the weaker sound source, thus losing the target

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
  • A multi-sound source tracking method for suppressing the main sound source
  • A multi-sound source tracking method for suppressing the main sound source
  • A multi-sound source tracking method for suppressing the main sound source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0063] The simulated room size is 4m×4m×2.7m, such as figure 1 , figure 2 and image 3 As shown, 8 microphones are installed on the walls around the room, and their heights are all 1.464m. The semicircle in the figure is the track of the sound source, the sound source moves in the direction indicated by the arrow, and its height is the same as the microphone. The sound source signals are two male voices with a duration of about 3.6s from the TIMIT database, and the sampling frequency is f s = 8kHz. The received signal of the microphone is generated by the image method, and a Gaussian white noise signal is added. Signal-to-noise ratio SNR=20dB, reverberation time T 60 = 0.132s. Frame length L=512 points, no overlap between frames, add Hanning window, the specific steps are as follows:

[0064] S1. Establish a two-dimensional rectangular coordinate system, determine the coordinates of each array element in the microphone array, divide the sound source signal received by ...

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

A multi-sound source tracking method that suppresses the main sound source, divides the speech sound source signal received by the microphone array into frames and adds windows; generates an initial particle group according to the initial state of the sound source; predicts the new particle state according to the state equation, and calculates Particle state observation value; determine the main source according to the localization function value at the estimated position of the sound source at the previous moment; calculate the distance between the weaker sound source particle and the main source, and construct an attenuation coefficient according to the distance; the weaker sound source close to the main source The particle state observation value of the sound source is multiplied by the attenuation coefficient to reduce its value; the pseudo-likelihood function of each sound source is constructed according to the localization function and the attenuation coefficient, and the particle weight of each sound source at the current moment is calculated according to the pseudo-likelihood function; The particle weights of each sound source are normalized, and the position of each sound source at the current moment is estimated according to the particle weight and particle state. The invention can keep track of the two sound sources when the two sound sources approach or the sound source tracks cross, and can be widely used in the fields of robot hearing, audio monitoring and the like.

Description

technical field [0001] The invention relates to the technical field of multi-sound source tracking based on a microphone array, in particular to a multi-sound source tracking method for suppressing a main sound source. Background technique [0002] Speech sound source localization and tracking technology based on microphone array has a very wide range of applications in digital hearing aids, robot hearing, intelligent monitoring and other fields. Early voice sound source localization and tracking technologies were mainly aimed at a single sound source, such as video conferencing, vehicle hands-free voice communication and other applications. After years of research, the localization and tracking algorithm of a single sound source has been able to achieve high accuracy. In recent years, with the expansion of the application field of sound source tracking technology, in many cases, the problem of multi-sound source localization and tracking needs to be considered. [0003] T...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/22
CPCG01S5/22
Inventor 蔡卫平黄印君刘瑞娟
Owner JIUJIANG VOCATIONAL & TECHN COLLEGE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com