Exploring permutation inconsistency in blind separation of speech signals in a reverberant environment
We study and explore the limitations of methods for blind separation of a mixture of multiple speakers in a real reverberant environment. To support our results, we analyze a frequency-domain method, which achieves blind source separation (BSS) by transforming the time-domain convolutive problem to...
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Published in | 2000 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.00CH37100) Vol. 2; pp. II1041 - II1044 vol.2 |
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Main Authors | , |
Format | Conference Proceeding |
Language | English |
Published |
IEEE
2000
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Subjects | |
Online Access | Get full text |
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Summary: | We study and explore the limitations of methods for blind separation of a mixture of multiple speakers in a real reverberant environment. To support our results, we analyze a frequency-domain method, which achieves blind source separation (BSS) by transforming the time-domain convolutive problem to multiple short-term problems in the frequency domain. We show that treating the problem independently at different frequency bins introduces a "permutation inconsistency" problem, which becomes worse as the length of room impulse response increases. Our studies prove that the ideas proposed in the existing literature are not capable of effectively handling this problem and a need exists for its satisfactory solution. We speculate that time-domain BSS techniques may also suffer from an equivalent permutation inconsistency problem when long un-mixing filters are used. |
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ISBN: | 9780780362932 0780362934 |
ISSN: | 1520-6149 2379-190X |
DOI: | 10.1109/ICASSP.2000.859141 |