Title :
A New Discriminative Common Spatial Pattern Method for Motor Imagery Brain–Computer Interfaces
Author :
Thomas, Kavitha P. ; Guan, Cuntai ; Lau, Chiew Tong ; Vinod, A.P. ; Ang, Kai Keng
Author_Institution :
Sch. of Comput. Eng., Nanyang Technol. Univ., Singapore, Singapore
Abstract :
Event-related desynchronization/synchronization patterns during right/left motor imagery (MI) are effective features for an electroencephalogram-based brain-computer interface (BCI). As MI tasks are subject-specific, selection of subject-specific discriminative frequency components play a vital role in distinguishing these patterns. This paper proposes a new discriminative filter bank (FB) common spatial pattern algorithm to extract subject-specific FB for MI classification. The proposed method enhances the classification accuracy in BCI competition III dataset IVa and competition IV dataset IIb. Compared to the performance offered by the existing FB-based method, the proposed algorithm offers error rate reductions of 17.42% and 8.9% for BCI competition datasets III and IV, respectively.
Keywords :
brain-computer interfaces; electroencephalography; handicapped aids; synchronisation; discriminative filter bank common spatial pattern algorithm; electroencephalogram-based brain-computer interface; event-related desynchronization-synchronization patterns; motor imagery brain-computer interfaces; Band pass filters; Brain computer interfaces; Channel bank filters; Computer interfaces; Councils; Electroencephalography; Error analysis; Feature extraction; Filter bank; Frequency synchronization; Motor drives; Support vector machine classification; Support vector machines; Brain–computer interface; electroencephalogram; motor imagery; Algorithms; Brain Mapping; Discriminant Analysis; Electroencephalography; Evoked Potentials, Motor; Humans; Imagination; Motor Cortex; Pattern Recognition, Automated; Reproducibility of Results; Sensitivity and Specificity; User-Computer Interface;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
DOI :
10.1109/TBME.2009.2026181
