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Blind Source Separation Combining Independent Component Analysis and Beamforming

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dc.contributor.author Hiroshi Saruwatari en
dc.contributor.author Satoshi Kurita en
dc.contributor.author Kazuya Takeda en
dc.contributor.author Fumitada Itakura en
dc.contributor.author Tsuyoki Nishikawa en
dc.contributor.author Kiyohiro Shikano en
dc.date.accessioned 2012-07-05T07:00:39Z en
dc.date.available 2012-07-05T07:00:39Z en
dc.date.issued 2003-11 en
dc.identifier.issn 1110-8657 en
dc.identifier.uri http://hdl.handle.net/10061/7785 en
dc.description.abstract We describe a new method of blind source separation (BSS) on a microphone array combining subband independent component analysis (ICA) and beamforming. The proposed array system consists of the following three sections: (1) subband ICA-based BSS section with estimation of the direction of arrival (DOA) of the sound source, (2) null beamforming section based on the estimated DOA, and (3) integration of (1) and (2) based on the algorithm diversity. Using this technique, we can resolve the low-convergence problem through optimization in ICA. To evaluate its effectiveness, signal-separation and speech-recognition experiments are performed under various reverberant conditions. The results of the signal-separation experiments reveal that the noise reduction rate (NRR) of about 18dB is obtained under the nonreverberant condition, and NRRs of 8dB and 6dB are obtained in the case that the reverberation times are 150 milliseconds and 300 milliseconds. These performances are superior to those of both simple ICA-based BSS and simple beamforming method. Also, fromthe speech-recognition experiments, it is evident that the performance of the proposed method in terms of the word recognition rates is superior to those of the conventional ICA-based BSS method under all reverberant conditions. en
dc.language.iso en en
dc.publisher Hindawi Publishing Corporation en
dc.rights Copyright (C) 2003 Hindawi Publishing Corporation. en
dc.subject blind source separation en
dc.subject microphone array en
dc.subject independent component analysis en
dc.subject beamforming en
dc.title Blind Source Separation Combining Independent Component Analysis and Beamforming en
dc.type.nii Journal Article en
dc.textversion publisher en
dc.identifier.jtitle EURASIP Journal on Applied Signal Processing en
dc.identifier.volume 2003 en
dc.identifier.spage 1135 en
dc.identifier.epage 1146 en
dc.relation.doi 10.1155/S1110865703305104 en

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