Personalized SSVEP-BCI Text Spelling User Interface

抄録

Spelling is a significant application ofbrain-computer interfaces (BCIs). Prior BCI spelling systems typically utilized LED stimulation interfaces, arranged either in the sequence of the 26 English letters or the Japanese Hiragana characters. This configuration, however, often leads to the presentation of numerous stimuli with varying frequencies during the spelling process, potentially resulting in spelling errors. In this paper, we introduce a novel stimulation interface that replicates the layout of a computer keyboard, utilizing groups of three letters as stimuli. The system enables the selection of the intended word after two rounds of stimulus selection. Furthermore, for each user, the most frequently used modules are enlarged after prolonged system use, thereby enhancing the spelling efficiency ofthe system.