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Visual and auditory combined mixed brain-computer interface method

A brain-computer interface and auditory technology, which is applied in the field of neural engineering and brain-computer interface, can solve the problems such as the lack of public disclosure of the combined method of visual and auditory hybrid brain-computer interface, so as to improve the illiteracy of the brain-computer interface, improve the control dimension, and achieve synchronous induction. Effect

Pending Publication Date: 2021-11-05
XI AN JIAOTONG UNIV
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AI Technical Summary

Problems solved by technology

[0003] There is currently no hybrid brain-computer interface approach that combines vision and hearing

Method used

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  • Visual and auditory combined mixed brain-computer interface method
  • Visual and auditory combined mixed brain-computer interface method
  • Visual and auditory combined mixed brain-computer interface method

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Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] A hybrid brain-computer interface method for audio-visual integration, comprising the following steps:

[0027] Step 1, refer to figure 1 , place measuring electrodes at the positions T7, TP7, P7, T8, TP8, P8, PO3, POz, PO4, O1, Oz, O2 in the visual occipital area and auditory temporal area of ​​the user's head, and place them at the position A1 of the earlobe on one side The reference electrode is placed at the Fpz position of the forehead of the head, and the visually evoked potential EEG responses are obtained from the PO3, POz, PO4, O1, Oz, and O2 channels of the visual occipital area, and the EEG responses are obtained from the left auditory temporal area T7, TP7, The P7 channel and the T8, TP8, and P8 channels of the right auditory temporal area obtain the EEG responses of auditory evoked potentials, and send the EEG signals meas...

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Abstract

The invention relates to a visual and auditory combined mixed brain-computer interface method comprising the following steps: placing an electrode on the head of a user, wearing earphones with different stimulation frequencies on left and right ears, presenting a visual motion stimulation unit in front of the user through a computer screen, playing amplitude-modulated sound wave auditory stimulation at the same time, and after visual stimulation and auditory stimulation are formed, enabling a user to focus on target visual stimulation and a target auditory channel, sending a measured electroencephalogram signal to a computer, after filtering and weighted average preprocessing, sending the electroencephalogram signal to a canonical correlation analysis algorithm for online identification, and obtaining a visual stimulation and auditory stimulation identification result and feeding the result back to a computer screen to be presented to the user; visual stimulation and auditory stimulation are adopted at the same time, electroencephalogram signals are obtained from two dimensions, the stability and robustness of brain-computer interface application are improved, and a new thought is developed for improving the brain-computer interface information dimension.

Description

technical field [0001] The invention relates to the technical fields of neuroengineering and brain-computer interface in biomedical engineering, and in particular to a hybrid brain-computer interface method combining audio-visual perception. Background technique [0002] Brain-computer interface is the abbreviation of human brain-computer interface. The brain-computer interface system collects endogenous or exogenous brain responses, and analyzes the control intention embedded in the brain signals through signal processing and pattern recognition. Judging from the current BCI research, there are many problems in single-mode BCI, the most prominent ones are the following two aspects: One is the phenomenon of "BCI illiteracy" among users, that is, some users are not familiar with a certain BCI. This BCI form is insensitive; secondly, the EEG signals collected from a single-mode BCI are limited, making it difficult to implement complex control modes. Therefore, the hybrid brai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/01A61B5/378A61B5/38A61B5/372
CPCG06F3/015A61B5/378A61B5/38A61B5/372
Inventor 谢俊任志远杨育喆张焕卿李敏徐光华
Owner XI AN JIAOTONG UNIV
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