Fast Nonclosed-form Higher-order ICA With Frequency-subband Selection Using Closed-form Second-order ICA


NAIST \| Library	Advanced Search	Japanese \| English

Please use this identifier to cite or link to this item: http://hdl.handle.net/10061/8239

Title:	Fast Nonclosed-form Higher-order ICA With Frequency-subband Selection Using Closed-form Second-order ICA
Authors:	Kentaro Tachibana Yu Takahashi Yoshimitsu Mori Hiroshi Saruwatari Kiyohiro Shikano Akira Tanaka
Issue Date:	Mar-2008
Start page:	188
End page:	191
Abstract:	In this paper, we proposed a faster convergence algorithm of blind source separation (BSS). We have proposed a computational-cost efficient BSS cascading closed-form 2nd-order independent component analysis (SO-ICA) with nonclosed-form higher-order ICA (HO-ICA). The closedform solution of SO-ICA has been recently presented by one of the authors. This finding motivates us to combine the closed-form SO-ICA with HO-ICA, where the preceding closed-form ICA produces a good initia1 va1ue and the following HO-ICA updates出e separation filters from the advantageous status. In this paper, we propose a faster convergence method of BSS by selecting optimized frequency-subbands for HO-ICA based on a proper cost function. The experimental result shows the proposed method's efficacy for the convergence speed under the realistic reverberant condition.
Description:	NCSP2008: RISP International Workshop on Nonlinear Circuits and Signal Processing, March 6-8, 2008, Gold Coast, Australia.
URI:	http://hdl.handle.net/10061/8239
Text Version:	Publisher
Appears in Collections:	情報科学研究科 / Graduate School of Information Science

Files in This Item:

File	Size	Format
NCSP_2008_188.pdf	515.89 kB	Adobe PDF	View/Open