A Time Delay Estimation Method Based on Wavelet Transform and Speech Envelope for Distributed Microphone Arrays

Advances in Electrical and Computer Engineering

CHEN, Z. ; WANG, S. ; YIN, F..

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

DOI  :  10.4316/AECE.2013.03007

学科分类：计算机科学（综合）

来源: Universitatea "Stefan cel Mare" din Suceava

【 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.

【 授权许可】

Unknown