System and method for processing brain signals in a bci system

A method of processing brain signals in a BCI system, the method comprising the steps of:

• processing the brain signals for control state detection to determine if a subject intends to use the BCI system;
• and
• processing the brain signals for command recognition if the control state detection method determines that the subject intends to use the BCI system.

The method as claimed in claim 19, wherein the determining whether over consecutive rounds the brain signal recorded for one of the stimuli corresponds to a P300 signal is based on the set of rounds with a highest posterior probability.

The method as claimed in claim 1 wherein the stimuli comprise one or more of a group consisting of a visual stimulus, an auditory or a somatosensory stimulus.

A system for processing brain signals in a BCI system, the system comprising of:

• a detection unit for processing the brain signals for control state detection to determine if a subject intends to use the BCI system;
• and
• a recognition unit for processing the brain signals for command recognition if the control state detection method determines that the subject intends to use the BCI system.

A data storage medium having stored thereon computer code means for instructing a computer system to execute a method of classifying brain signals in a BCI system, the method comprising the steps of:

• processing the brain signals for control state detection to determine if a subject intends to use the BCI system;
• and
• processing the brain signals for command recognition if the control state detection method determines that the subject intends to use the BCI system.