Robust Multichannel Acoustic Time Delay Estimation in Reverberant Environments

Conference: Sprachkommunikation 2010 - 9. ITG-Fachtagung
10/06/2010 - 10/08/2010 at Bochum, Deutschland

Proceedings: Sprachkommunikation 2010

Pages: 4Language: englishTyp: PDF

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Hennecke, Marius H.; Fink, Gernot A. (Robotics Research Institute, TU Dortmund University, Germany)

Time delay estimation is a basic building block of an acoustic source localization system. Such a system must cope with adverse acoustic conditions to be generally applicable, i.e. high reverberation times and low signal-to-noise ratios. In general, better results can be achieved if multiple channels are considered. We propose an extension of a mutual information based delay estimator to the multichannel case. Additionally, we give a unified description of the proposed estimator, the generalized cross-correlation and its multichannel counterpart. Using simulated and real recordings, a comparative performance evaluation shows the robustness of the proposed method under adverse acoustic conditions.