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Paper Abstract and Keywords
Presentation 2011-06-30 16:55
Optimal design of a spatio-temporal filter bank for EEG signal classification
Hiroshi Higashi, Toshihisa Tanaka (TUAT) CAS2011-15 VLD2011-22 SIP2011-44 MSS2011-15
Abstract (in Japanese) (See Japanese page) 
(in English) We propose a method to design multiple FIR filters and the associated spatial weights associated for feature extraction in EEG signal classification for motor imagery based brain computer interface (MI-BCI). The spatial weights for electrodes called common spatial pattern (CSP) are known to be effective for feature extraction of MI-BCI. However, to achieve accurate classification in CSP, the frequency filter should be properly designed. To this end, several methods for designing the filter have been proposed. However, the existing methods cannot consider plural brain activities corresponding to different frequency bands and different spatial patterns such as activities of mu and beta rhythms. To address this problem, we design a set of filters that can successfully classify a learning datasets. To efficiently extract these brain activities, we design a cost function that has optimal parameters of spatial weights and filter coefficients. Moreover, by introducing a constraint of orthogonality between vectors of filter coefficients, the proposed method can design multiple FIR filters and the associated spatial weights. In the classification experiment of MI-BCI, the proposed method outperforms existing methods. Moreover, the experiment result suggests that the proposed method can automatically detect and extract the frequency bands that contain brain activities related to motor imagery.
Keyword (in Japanese) (See Japanese page) 
(in English) brain computer interface / common spatial pattern / finite impulse response filter / generalized eigenvalue problem / / / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 104, SIP2011-44, pp. 85-90, June 2011.
Paper # SIP2011-44 
Date of Issue 2011-06-23 (CAS, VLD, SIP, MSS) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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Download PDF CAS2011-15 VLD2011-22 SIP2011-44 MSS2011-15

Conference Information
Committee MSS CAS VLD SIP  
Conference Date 2011-06-30 - 2011-07-01 
Place (in Japanese) (See Japanese page) 
Place (in English) Okinawa-Ken-Seinen-Kaikan 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To SIP 
Conference Code 2011-06-MSS-CAS-VLD-SIP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Optimal design of a spatio-temporal filter bank for EEG signal classification 
Sub Title (in English)  
Keyword(1) brain computer interface  
Keyword(2) common spatial pattern  
Keyword(3) finite impulse response filter  
Keyword(4) generalized eigenvalue problem  
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1st Author's Name Hiroshi Higashi  
1st Author's Affiliation Tokyo University of Agriculture and Technology (TUAT)
2nd Author's Name Toshihisa Tanaka  
2nd Author's Affiliation Tokyo University of Agriculture and Technology (TUAT)
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Speaker Author-1 
Date Time 2011-06-30 16:55:00 
Presentation Time 20 minutes 
Registration for SIP 
Paper # CAS2011-15, VLD2011-22, SIP2011-44, MSS2011-15 
Volume (vol) vol.111 
Number (no) no.102(CAS), no.103(VLD), no.104(SIP), no.105(MSS) 
Page pp.85-90 
#Pages
Date of Issue 2011-06-23 (CAS, VLD, SIP, MSS) 


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