Title :
The realization of BCI multi-dimension control based on time-frequency coding
Author :
Peng, Xu ; Zhang Yang Song ; Jun, Hu ; Li Pei Yang ; Liu Tie Jun ; Dezhong, Yao
Author_Institution :
Key Lab. for NeuroInformation of Minist. of Educ., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
Steady-state visual evoked potential (SSVEP) has been widely used in online Brain computer interface (BCI), due to its high signal-to-noise (SNR). However, owing to the limitation of brain physiology, the number of frequency stimuli that can evoke the strong SSVEP is very limited, which cannot realize the target number as desired. In our previous work, we have developed a Multiple frequencies sequential coding (MFSC), which can realize the efficient coding for targets by utilizing both the temporal and frequency information. In current work, we will use two frequencies stimuli to realize the 4-dimension control. The results confirmed that this coding scheme can actually have high accurate output for BCI system, and it may be a promising protocol in the SSVEP based BCI system.
Keywords :
brain-computer interfaces; encoding; multidimensional systems; neurophysiology; sequential codes; time-frequency analysis; visual evoked potentials; 4-dimension control; BCI multidimension control; SNR; SSVEP based BCI system; frequency information; frequency stimuli; multiple frequency sequential coding scheme; online brain computer interface; signal-to-noise; steady-state visual evoked potential; temporal information; time-frequency coding; Brain computer interfaces; Educational institutions; Electric potential; Electronic mail; Encoding; Steady-state; Visualization; Brain computer interface; Multiple frequencies sequential coding; Steady-state visual evoked potential;
Conference_Titel :
Control Conference (CCC), 2012 31st Chinese
Conference_Location :
Hefei
Print_ISBN :
978-1-4673-2581-3
