Patent ID: 8463371
Filing Date: 2013-06-11
Classification: A61B,A61F,G06F,G06K,G16H

Abstract:
1. A computer-implemented method of processing brain signals in a Brain Computer Interface (BCI) system, the method comprising the steps of: providing a pre-defined set of stimuli and repeatedly activating the stimuli in rounds, wherein in each of the rounds each of the stimuli is activated once; detecting the respective brain signals in response to each of the stimuli being activated during each of the rounds; determining whether a subject intends to use the BCI system based on the detected respective brain signals using a processor; and processing the brain signals for command recognition if it is determined that the subject intends to use the BCI system; wherein the determining whether the subject intends to use the BCI system comprises: after k collected number of rounds, determining all the possible signal windows covering l consecutive rounds, from a most recently collected round to a round that was collected l rounds before the most recently collected round, where L<l<k, L is a predefined minimum value, and 3<L<k; determining the signal window from among said possible signal windows which gives a highest posterior probability that a control pattern was received in said signal window; and checking whether said highest posterior probability is greater than a predefined first threshold.