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Research Article Exploiting Narrowband Efficiency for Broadband Convolutive Blind Source Separation
BibTeX
@MISC{Aichner_researcharticle,
author = {Robert Aichner and Herbert Buchner and Walter Kellermann},
title = {Research Article Exploiting Narrowband Efficiency for Broadband Convolutive Blind Source Separation},
year = {}
}
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Abstract
Based on a recently presented generic broadband blind source separation (BSS) algorithm for convolutive mixtures, we propose in this paper a novel algorithm combining advantages of broadband algorithms with the computational efficiency of narrowband techniques. By selective application of the Szegö theorem which relates properties of Toeplitz and circulant matrices, a new normalization is derived as a special case of the generic broadband algorithm. This results in a computationally efficient and fast converging algorithm without introducing typical narrowband problems such as the internal permutation problem or circularity effects. Moreover, a novel regularization method for the generic broadband algorithm is proposed and subsequently also derived for the proposed algorithm. Experimental results in realistic acoustic environments show improved performance of the novel algorithm compared to previous approximations. Copyright © 2007 Robert Aichner et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 1.
Keyphrases
research article exploiting narrowband efficiency broadband convolutive blind source separation generic broadband algorithm novel algorithm original work realistic acoustic environment source separation typical narrowband problem novel regularization method special case selective application narrowband technique broadband algorithm creative common attribution license circularity effect generic broadband robert aichner computational efficiency internal permutation problem unrestricted use fast converging algorithm szeg theorem previous approximation improved performance open access article convolutive mixture new normalization experimental result circulant matrix
