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IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences 2005 E88-A(7):1640-1655; doi:10.1093/ietfec/e88-a.7.1640
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Copyright © 2005 The Institute of Electronics, Information and Communication Engineers

Special Section on Multi-channel Acoustic Signal Processing -- Papers

Blind Source Separation of Convolutive Mixtures of Speech in Frequency Domain

Shoji MAKINO1, Hiroshi SAWADA1, Ryo MUKAI1 and Shoko ARAKI1

1 The authors are with NTT Communication Science Laboratories, NTT Corporation, Kyoto-fu, 619-0237 Japan. E-mail: maki{at}cslab.kecl.ntt.co.jp

This paper overviews a total solution for frequency-domain blind source separation (BSS) of convolutive mixtures of audio signals, especially speech. Frequency-domain BSS performs independent component analysis (ICA) in each frequency bin, and this is more efficient than time-domain BSS. We describe a sophisticated total solution for frequency-domain BSS, including permutation, scaling, circularity, and complex activation function solutions. Experimental results of 2 x 2, 3 x 3, 4 x 4, 6 x 8, and 2 x 2 (moving sources), (#sources x #microphones) in a room are promising.

Key Words: blind source separation, convolutive mixtures, independent component analysis, frequency-domain BSS, microphone array, adaptive beamformer

Manuscript received February 16, 2005. Final manuscript received March 9, 2005.


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