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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.
Text Version: Publisher
Appears in Collections:情報科学研究科 / Graduate School of Information Science

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