A Study on Switching ON/OFF of P300 Speller based on Discrimination of Input Inclination of User

Abstract

Brain-Computer Interface (BCI) is a system that controls external devices based on the signal of human’s brain. The P300 speller, which uses P300 as the target feature, is one of the BCI communication tools. P300 speller allows a user to select letters just by user’s thought. However, generally a user can not switch P300 speller ON and OFF by himself/herself. This paper proposes and studies a P300 speller which is synchronous to the intention of input of user based on the probability density distribution of discriminant score.