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A Dual Stimuli Approach Combined with Convolutional Neural Network to Improve Information Transfer Rate of
Wei Li1, Mengfan Li2, Huihui Zhou3
11 Department of Computer & Electrical Engineering and Computer Science, California State University, Bakersfield, California 93311, USA.
Abstract:
Increasing command generation rate of an event-related potential-based brain-robot system is challenging, because of limited information transfer rate of a brain-computer interface system. To improve the rate, we propose a dual stimuli approach that is flashing a robot image and is scanning another robot image simultaneously. Two kinds of event-related potentials, N200 and P300 potentials, evoked in this dual stimuli condition are decoded by a convolutional neural network. Compared with the traditional approaches, this proposed approach significantly improves the online information transfer rate from 23.0 or 17.8 to 39.1 bits/min at an accuracy of 91.7%. These results suggest that combining multiple types of stimuli to evoke distinguishable ERPs might be a promising direction to improve the command generation rate in the brain-computer interface.
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