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A Time Delay Estimation Method Based on Wavelet Transform and Speech Envelope for Distributed Microphone ArraysCHEN, Z. , WANG, S. , YIN, F.
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microphone arrays, time of arrival estimation, Wavelet transforms, envelope detectors, speech processing
signal(11), processing(10), microphone(8), localization(7), sound(5), distributed(5), arrays(5), acoustics(5), time(4), estimation(4)
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About this article
Date of Publication: 2013-08-31
Volume 13, Issue 3, Year 2013, On page(s): 39 - 44
ISSN: 1582-7445, e-ISSN: 1844-7600
Digital Object Identifier: 10.4316/AECE.2013.03007
Web of Science Accession Number: 000326321600007
SCOPUS ID: 84884969621
A time delay estimation method based on wavelet transform and speech envelope is proposed for distributed microphone arrays. This method first extracts the speech envelopes of the signals processed with multi-level discrete wavelet transform, and then makes use of the speech envelopes to estimate a coarse time delay. Finally it searches for the accurate time delay near the coarse time delay by the cross-correlation function calculated in time domain. The simulation results illustrate that the proposed method can accurately estimate the time delay between two distributed microphone array signals.
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