A Time Delay Estimation Method Based on Wavelet Transform and Speech Envelope for Distributed Microphone Arrays
- Resource Type
- article
- Authors
- YIN, F.; WANG, S.; CHEN, Z.
- Source
- Advances in Electrical and Computer Engineering, Vol 13, Iss 3, Pp 39-44 (2013)
- Subject
- microphone arrays
time of arrival estimation
Wavelet transforms
envelope detectors
speech processing
Electrical engineering. Electronics. Nuclear engineering
TK1-9971
Computer engineering. Computer hardware
TK7885-7895
- Language
- English
- ISSN
- 1582-7445
1844-7600
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.