Time-Shift Correlation Algorithm for P300 Event Related Potential Brain-Computer Interface Implementation

Table 3

Performance comparison of the proposed approach and conventional CCA SVM.

Methods	Classification accuracy/illegal trial rates (%)
	Subject 1		Subject 2		Subject 3
	Proposed BCI	CCA SVM	Proposed BCI	CCA SVM	Proposed BCI	CCA SVM
Average 1 epoch	90.0/30.0	87.92/40.0	84.81/21.0	83.52/46.0	75.00/28.0	74.00/50.0
Data transfer rate (bit/min.)	49.41	38.49	43.82	28.17	24.45	16.09
Average 2 epochs	95.35/14.0	96.22/15.50	88.64/12.0	91.44/18.50	83.72/14.0	87.1/19.0
Data transfer rate (bit/min.)	38.77	39.68	29.18	30.72	22.65	25.01
Average 3 epochs	100.0/3.03	100.0/7.0	96.67/9.09	97.78/9.25	90.0/9.09	90.48/12.0
Data transfer rate (bit/min.)	36.57	35.07	28.78	30.30	21.18	20.95

Accuracy rate = correct/(correct + incorrect).
Illegal trial rate = illegal/total trials.