[Experimental study on brain-computer interface based on visual evoked potentials].
Brain-computer interface is a novel EEG-based communication and control system between human brain and computer or some other electric device, which has found important applications in many fields such as rehabilitation engineering. Study has been done in brain-computer interface using visual evoked potentials(VEP). Multiple stimulation patterns were produced on the computer screen through programming. Several flickering blocks were adopted for representing a number of possible selections, and when the subject was fixing his(her) eyes on an object on the screen, the very object could be distinguished by the analysis of the VEPs. Surface electrodes were placed at Oz of the inion and Cz to collect VEP. The wavelet filter and averaging method was used to extract VEP signal. Off-line experimental data analysis indicated that the proposed method may be valuable for developing real brain-computer interface with relatively high accuracy and speed, and the information transfer rates could be higher than 30 bit/min when 12 selections were on the screen.
He
Qinghua
Q
College of Bioengineering, Chongqing University, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, China.
Peng
Chenglin
C
Wu
Baoming
B
Wang
He
H
D001921:Brain / Q000502:physiology; D004569:Electroencephalography; D005074:Evoked Potentials, Visual; D006801:Humans; D012815:Signal Processing, Computer-Assisted; D014584:User-Computer Interface; D058067:Wavelet Analysis