Brain-computer interface system based on auditory attention and multifocal electrophysiology and implementation method

Abstract

The invention relates to a brain-computer interface system based on auditory attention and multifocal electrophysiology and an implementation method. The brain-computer interface system based on auditory attention and multifocal electrophysiology is characterized in that the brain-computer interface system comprises an auditory stimulator module, a signal acquisition module, a signal processing module and an execution module; the auditory stimulator module can generate sound sources with multiple frequencies and multiple sound tracks simultaneously, and the sound sources are distributed at different positions of virtual auditory space; all the sound sources are controlled by a same M sequence, and the sound sources produce sounds when the M sequence is 1 and do not produce sounds when theM sequence is 0; the signal acquisition module collects and acquires mixed electrophysiological signals of auditory response through sensors, and signal amplification and simulation/digital conversionare conducted; the signal processing module conducts quick mutual closing calculation on the mixed electrophysiological signals and the M sequence, and auditory response signals corresponding to allthe sound sources are acquired; and then characteristic value extraction is conducted on the auditory response signals of all the sound sources, characteristic vectors are classified through a distinguishing and classifying module, and the sound sources drawing the attention of a tester are decoded, so that the mind of the tester is determined, and the execution module is controlled to execute corresponding action.

Description

Technical field: [0001] The invention discloses a brain-computer interface system and a realization method based on auditory attention and multi-focal electrophysiology, and belongs to the intersecting technical field of neurocognitive science, information processing, and automatic control. Background technique: [0002] Brain-computer interface is one of the hot topics in neuroengineering research. Brain-computer is to establish a direct communication and control channel between the human brain and computers or other electronic devices. Through this channel, people can express ideas or operate devices directly through the brain, without the need for language or physical actions. [0003] For those patients who have completely lost peripheral neuromuscular control, if they want to control the external environment, such as controlling the surrounding electrical equipment, they must interpret brain signals into corresponding control commands. There are many ways to generate ...

AI Technical Summary

Problems solved by technology

However, in this method, it is difficult to decode the information contained in the signal, and the individual differences are also large.

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