A graph theoretical framework for consistent time differences of arrival

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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Kreißig, Martin; Yang, Bin (Lehrstuhl für Systemtheorie und Signalverarbeitung, Universität Stuttgart, 70550 Stuttgart, Germany)

The estimation of time difference of arrival (TDOA) plays an important role in acoustic source localization, blind source separation, acoustic sound control, and improved speech communication. However, when multiple sources are active in a reverberant environment, the TDOA estimates are known to suffer from the multipath and multiple source ambiguity, and hence are less reliable. In a previous work, we introduced the idea of consistent graphs to combat these TDOA ambiguities. In this paper, we go one step further and present a graph theoretical framework to study this consistency problem. It turns out that many concepts from the graph theory are useful for this purpose.