基于SSVEP阻断与P300特征的混合范式脑-机接口

摘要

针对传统脑电型非侵入式脑-机接口判断正确率低、信息传输率低等问题，设计了一种基于SSVEP阻断和P300双特征的混合范式P300-SSVEP-Speller脑-机接口系统。对12位受试者进行了脑电诱发及目标识别实验，结果表明：本范式能够同时诱发出SSVEP阻断特征信号和P300特征信号，采用联合特征的新型的P300-SSVEP-Speller系统比传统的P300-Speller系统具有更高的判断正确率和信息传输率。%To solve the problems that the conventional brain-computer interfaces (BCIs ) transfer the mental intents into the control commands with a low judgment accuracy and unsatisfied information transfer rate (ITR ) ,a novel hybrid BCI called the P300-SSVEP-Speller was developed on the basis of the P300-Speller to combine SSVEP blocking (SSVEPB ) features with P300 potentials .The offline usage of twelve subjects was investigated in the study .Results show that the elicited SSVEPB has little influ-ence on the emergence of the P300 potentials in the degree of temporal signals .In addition ,from the view of character recognition , the novel P300-SSVEP-Speller system has a better performance than the conventional P300-Speller on the judgment accuracy and ITR .