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Indexed by:期刊论文

Date of Publication:2013-01-01

Journal:ADVANCES IN ELECTRICAL AND COMPUTER ENGINEERING

Included Journals:SCIE、Scopus

Volume:13

Issue:3

Page Number:39-44

ISSN No.:1582-7445

Key Words:microphone arrays; time of arrival estimation; Wavelet transforms; envelope detectors; speech processing

Abstract: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.