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2010

A robust method to count and locate audio sources in a multichannel underdetermined mixture

8 years 5 months ago
A robust method to count and locate audio sources in a multichannel underdetermined mixture
We propose a method to count and estimate the mixing directions in an underdetermined multichannel mixture. The approach is based on the hypothesis that in the neighbourhood of some time-frequency points, only one source essentially contributes to the mixture: such time-frequency points can provide robust local estimates of the corresponding source direction. At the core of our contribution is a statistical model to exploit a local confidence measure which detects the timefrequency regions where such robust information is available. A clustering algorithm called DEMIX is proposed to merge the information from all time-frequency regions according to their confidence level. So as to estimate the delays of anechoic mixtures and overcome the intrinsic ambiguities of phase unwrapping as met with DUET, we propose a technique similar to GCC-PHAT which is able to estimate delays that can largely exceed one sample. We propose an extensive experimental study which shows that the resulting method...
Simon Arberet, Rémi Gribonval, Fréd&
Added 22 May 2011
Updated 22 May 2011
Type Journal
Year 2010
Where TSP
Authors Simon Arberet, Rémi Gribonval, Frédéric Bimbot
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