Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2013-01-01

Journal: ADVANCES IN ELECTRICAL AND COMPUTER ENGINEERING

Included Journals: Scopus、SCIE

Volume: 13

Issue: 3

Page Number: 39-44

ISSN: 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.