DocumentCode :
578452
Title :
A sound-source localization system using three-microphone array and crosspower spectrum phase
Author :
Gu, Hung-yan ; Yang, Shan-siang
Author_Institution :
Dept. of Comput. Sci. & Inf. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei, Taiwan
Volume :
5
fYear :
2012
fDate :
15-17 July 2012
Firstpage :
1732
Lastpage :
1736
Abstract :
A sound source localization system is implemented that uses only three microphones to input sound signals. This system can estimate the azimuth and elevation of a sound source in real-time and in sufficient accuracy. We add a SNR measure besides spectra entropy to help detect voiced frames. Next, synchronous FFT phase copying is adopted, and cross-power spectrum phase is calculated to estimate TDOA (time delay of arrival) for each frame. Also, to enhance the accuracy of TDOA, parabolic interpolation is adopted. Then, by comparing the estimated TDOA values with theoretic ones, the azimuth and elevation of a sound source can be determined. Since a pair of azimuth and elevation is estimated from each voiced frame, these estimated values are thereafter summed with a weighting method to give one final answer of azimuth and elevation. According to the experiment results, the average errors in estimating azimuth and elevation are 4.02 and 2.18 degrees, respectively.
Keywords :
acoustic signal processing; fast Fourier transforms; interpolation; microphone arrays; time-of-arrival estimation; SNR; TDOA estimation; cross-power spectrum phase; crosspower spectrum phase; parabolic interpolation; sound signals; sound-source localization system; spectra entropy; synchronous FFT phase copying; three-microphone array; time delay of arrival estimation; Abstracts; Arrays; Azimuth; Microwave integrated circuits; TDOA; crosspower spectrum phase; direction estimation; microphone array; sound source localization;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Machine Learning and Cybernetics (ICMLC), 2012 International Conference on
Conference_Location :
Xian
ISSN :
2160-133X
Print_ISBN :
978-1-4673-1484-8
Type :
conf
DOI :
10.1109/ICMLC.2012.6359636
Filename :
6359636
Link To Document :
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