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Paper Abstract and Keywords
Presentation 2005-06-27 11:10
Analysis of Signal Separation and Signal Distortion in Feedforward and Feedback Blind Source Separation Based on Source Spectra
Akihide Horita, Kenji Nakayama, Akihiro Hirano (Kanazawa Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) Source separation and signal distortion in three kinds of blind soure separation (BSS) systems with convolutive mixture are analyzed. They consist of two feedforward BSS system, one trained in the time domain and the other trained in the frequency domain, and a feedback BSS system, trained in the time domain. An evaluation measure of the signal distortion has been investigated and conditions for source separation and distortion free have been derived. Based on these conditions, source separation and signal distortion have been analyzed. The feedforward BSS systems have some degree of freedom and the output spectrum can be changed. The feedforward BSS system, trained in the frequency domain, has a weighting effect, which can suppress signal distortion. However, this weighting effect is only effective only when the source spectra are similar to each other. Since, the feedforward BSS system, trained in the time domain, does not have any constraints on signal distortion free, its output signals can be easily distorted. A new learning algorithm with a distortion free constraint has been proposed. On the other hand, the feedback BSS system can satisfy both source separation and distortion free conditions simultaneously. Performed simulation results support our theoretical analysis.
Keyword (in Japanese) (See Japanese page) 
(in English) Blind source separation / Signal distortion / Feedforward / Convergence property / Controlling signal distortion / / /  
Reference Info. IEICE Tech. Rep., vol. 105, no. 149, SIP2005-29, pp. 25-30, June 2005.
Paper # SIP2005-29 
Date of Issue 2005-06-20 (CAS, VLD, SIP) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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Conference Information
Committee CAS SIP VLD  
Conference Date 2005-06-27 - 2005-06-28 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Signal Processing, LSI, etc. 
Paper Information
Registration To SIP 
Conference Code 2005-06-CAS-SIP-VLD 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Analysis of Signal Separation and Signal Distortion in Feedforward and Feedback Blind Source Separation Based on Source Spectra 
Sub Title (in English)  
Keyword(1) Blind source separation  
Keyword(2) Signal distortion  
Keyword(3) Feedforward  
Keyword(4) Convergence property  
Keyword(5) Controlling signal distortion  
1st Author's Name Akihide Horita  
1st Author's Affiliation Kanazawa University (Kanazawa Univ.)
2nd Author's Name Kenji Nakayama  
2nd Author's Affiliation Kanazawa University (Kanazawa Univ.)
3rd Author's Name Akihiro Hirano  
3rd Author's Affiliation Kanazawa University (Kanazawa Univ.)
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Date Time 2005-06-27 11:10:00 
Presentation Time 25 
Registration for SIP 
Paper # IEICE-CAS2005-5,IEICE-VLD2005-16,IEICE-SIP2005-29 
Volume (vol) IEICE-105 
Number (no) no.145(CAS), no.147(VLD), no.149(SIP) 
Page pp.25-30 
#Pages IEICE-6 
Date of Issue IEICE-CAS-2005-06-20,IEICE-VLD-2005-06-20,IEICE-SIP-2005-06-20 

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