Apparatus and method to track positions of multiple sound sources
First Claim
Patent Images
1. An apparatus to track positions of multiple sound sources, the apparatus comprising:
- a microphone array to which sound signals of a plurality of sound sources are input;
a sound source separator to separate the sound signals input to the microphone array into independent sound source signals;
a target sound source selector to select a target sound source to be tracked by analyzing patterns of the separated sound source signals;
a correlation coefficient estimator to estimate correlation coefficients between the sound signals input to the microphone array and the separated sound source signals and to create a correlation coefficient matrix using the estimated correlation coefficients; and
a sound source position estimator to estimate a position of the selected target sound source using the estimated correlation coefficients,wherein the sound source position estimator rearranges all correlation coefficients of the target sound source according to magnitudes of the correlation coefficients thereof.
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Abstract
Disclosed herein is an apparatus and method to track positions of multiple sound sources which can simultaneously track the positions of multiple sound sources. Sound signals input to an array of microphones are separated into independent sound source signals, correlation coefficients between the sound signals input to the microphones and the separated sound source signals are estimated, and the estimated correlation coefficients are analyzed to track the positions of the sound sources.
9 Citations
25 Claims
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1. An apparatus to track positions of multiple sound sources, the apparatus comprising:
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a microphone array to which sound signals of a plurality of sound sources are input; a sound source separator to separate the sound signals input to the microphone array into independent sound source signals; a target sound source selector to select a target sound source to be tracked by analyzing patterns of the separated sound source signals; a correlation coefficient estimator to estimate correlation coefficients between the sound signals input to the microphone array and the separated sound source signals and to create a correlation coefficient matrix using the estimated correlation coefficients; and a sound source position estimator to estimate a position of the selected target sound source using the estimated correlation coefficients, wherein the sound source position estimator rearranges all correlation coefficients of the target sound source according to magnitudes of the correlation coefficients thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method to track positions of multiple sound sources, the method comprising:
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separating sound signals input to a microphone array into independent sound source signals; selecting a target sound source to be tracked by analyzing patterns of the separated sound source signals; estimating correlation coefficients between the sound signals input to the microphone array and the separated sound source signals and creating a correlation coefficient matrix using the estimated correlation coefficients; and estimating a position of the selected target sound source using the estimated correlation coefficients, wherein the estimation of the position of the target sound source includes rearranging all correlation coefficients of the target sound source according to magnitudes of the correlation coefficients thereof. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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25. A method to track positions of multiple sound sources, the method comprising:
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separating sound signals input to a microphone array into independent sound source signals; selecting a target sound source to be tracked by analyzing patterns of the separated sound source signals; and estimating a position of the selected target sound source using three largest magnitudes of correlation coefficients of a cross correlation between microphones of the array and the target sound source, wherein the estimation of the position of the target sound source includes rearranging all correlation coefficients of the target sound source according to magnitudes of the correlation coefficients thereof.
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Specification