Conference Paper

Correlogram template matching for time-delay estimation

Hewlett-Packard Labs., Palo Alto, CA, USA
DOI: 10.1109/ICASSP.2011.5946981 Conference: Acoustics, Speech and Signal Processing (ICASSP), 2011 IEEE International Conference on
Source: IEEE Xplore

ABSTRACT We propose a correlogram-based time delay estimation method using signals modeled as the output of the cochlea, where the low-level signal processing happens in the human auditory system. With a normalized correlogram that preserves time-delay patterns that are invariant to speech features such as formants, we employ two-dimensional template matching for time-delay estimation. Experimental results show that our method outperforms a traditional correlogram-based method as well as the GCC-PHAT, especially for short analysis windows in a moderately reverberant environment.

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    ABSTRACT: Conventional time delay estimation approaches usually only deal with direct signal model, they are not suitable for multipath environments. And most approaches can't estimate integral and fractional delay at once. In order to overcome these defects, in this paper, we propose a super-resolution time delay estimation method that takes advantage of normalized cross spectrum of observed signals for passive systems. The CRB of time delay estimation is be given in multipath environments. Simulation results confirm that proposed time delay estimator can estimate integral and fractional time delay at once, and provides a super-resolution performance.
    2013 International Conference on Communications, Circuits and Systems (ICCCAS); 11/2013

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