TY - GEN
T1 - Two-layer hidden Markov models for multi-class motor imagery classification
AU - Suk, Heung Il
AU - Lee, Seong Whan
PY - 2010
Y1 - 2010
N2 - Classifiers in a high dimensional space based on the signals of multiple electrodes in EEG-based BCIs suffer from the curse of dimensionality due to the limited training dataset. In order to tackle this problem, we design a framework of two-layer hidden Markov models (HMMs) for probabilistic classification of EEG signals. We first independently model the characteristics of EEG signals embedded in each channel for different motor imagery tasks in the lower-layer, and then represent the holistic task-related dynamic EEG patterns in the upper-layer by considering the relationships among channels. From the experimental results based on the dataset II-a of BCI Competition IV (2008), we demonstrated that our method achieved high session-to-session transfer results and was superior to previous methods.
AB - Classifiers in a high dimensional space based on the signals of multiple electrodes in EEG-based BCIs suffer from the curse of dimensionality due to the limited training dataset. In order to tackle this problem, we design a framework of two-layer hidden Markov models (HMMs) for probabilistic classification of EEG signals. We first independently model the characteristics of EEG signals embedded in each channel for different motor imagery tasks in the lower-layer, and then represent the holistic task-related dynamic EEG patterns in the upper-layer by considering the relationships among channels. From the experimental results based on the dataset II-a of BCI Competition IV (2008), we demonstrated that our method achieved high session-to-session transfer results and was superior to previous methods.
KW - Brain-Computer Interface (BCI)
KW - Electroencephalography (EGG)
KW - Hidden Markov models (HMMs)
KW - Motor imagery classification
UR - http://www.scopus.com/inward/record.url?scp=78049502454&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78049502454&partnerID=8YFLogxK
U2 - 10.1109/WBD.2010.16
DO - 10.1109/WBD.2010.16
M3 - Conference contribution
AN - SCOPUS:78049502454
SN - 9780769541334
T3 - Proceedings - Workshop on Brain Decoding: Pattern Recognition Challenges in Neuroimaging, WBD 2010 - In Conjunction with theInternational Conference on Pattern Recognition, ICPR 2010
SP - 5
EP - 8
BT - Proceedings - Workshop on Brain Decoding
T2 - Workshop on Brain Decoding: Pattern Recognition Challenges in Neuroimaging, WBD 2010 - In Conjunction with the International Conference on Pattern Recognition, ICPR 2010
Y2 - 22 August 2010 through 22 August 2010
ER -