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论文类型：期刊论文

发表时间：2013-01-01

发表刊物：ADVANCES IN ELECTRICAL AND COMPUTER ENGINEERING

收录刊物：SCIE、Scopus

卷号：13

期号：3

页面范围：39-44

ISSN号：1582-7445

关键字：microphone arrays; time of arrival estimation; Wavelet transforms; envelope detectors; speech processing

摘要：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.