A Calibration-Efficient 64-Target c-VEP Brain–Computer Interface with Grouped Quinary Relative-Color Modulation and TDCA–MLP Decoding
Aims: Conventional code-modulated visual evoked potential (c-VEP) brain–computer interface (BCI) systems commonly employ high-contrast binary black-and-white flickering stimuli, which can induce visual fatigue, while time-shift encoding based on a single pseudorandom sequence limits the number of recognisable targets....