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Nearest Subspace Representations for Sound Mixtures

ICASSP 2011 - International Conference on Acoustics, Speech, and Signal Processing

Published February 1, 2011

Paris Smaragdis

In this paper we present a novel approach to describe sound mixtures which is based on a geometric viewpoint. In this approach we extend the idea of a nearest-neighbor representation to address the case of superimposed sources. We show that in order to account for mixing effects we need to perform a search for nearest-subspaces, as op- posed to nearest-neighbors. In order to reduce the excessive compu- tational complexity of this search we present an efficient algorithm to solve this problem which amounts to a sparse coding approach. We demonstrate the efficacy of this algorithm by using it to separate mixtures of speech.

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Research Area:  Audio