Digital Communication Through the Brain: Modulation With PerceptualStimuli and Demodulation from the Brain

点击翻译按钮获取中文摘要

A brain-computer interface (BCI) based on steady-state visual-evoked potentials (SSVEP) has two difficulties: limitation of the number of commands and uneven probabilities of command execution. To address these problems, the present research project proposed a paradigm of BCI using frequency-modulated visual stimuli. The commands are translated into code words consisting of binary digits, to which visual stimuli with distinct frequencies are assigned. Frequencies of SSVEP are recognized to detect bits, and a command to be executed is determined from the sequence of detected bits. Experimental results showed that the proposed paradigm achieved a reliable BCI with higher accuracies and balanced command executing probabilities.