Method for audio-visual combined stimulation of brain-computer interface based on covert attention

A machine interface and hidden technology, applied in the field of human-computer interaction, can solve problems such as unseen mature technology reports, and achieve the effects of convenient operation, considerable social and economic benefits

Active Publication Date: 2011-09-14
中电云脑(天津)科技有限公司
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[0008] There are no mature tech

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  • Method for audio-visual combined stimulation of brain-computer interface based on covert attention
  • Method for audio-visual combined stimulation of brain-computer interface based on covert attention
  • Method for audio-visual combined stimulation of brain-computer interface based on covert attention

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Embodiment Construction

[0034] The present invention proposes a new target presentation method on the basis of classic visual and auditory stimulation modes. The structural diagram of the system of the present invention is as follows figure 2 shown, including the following steps

[0035] (1) System initialization: the user is connected to the computer brain-computer interface device through the electrodes on the scalp. The user needs to put on the earphone and open the stimulation interface. The stimulation interface flashes according to the oddball sequence. There are two properties for the flashing stimulation, One is the target stimulus, which is the target of the user's implicit attention, and the other is the non-target stimulus. For each visual stimulus, it is accompanied by a corresponding sound stimulus. The user needs to silently count the number of times the target stimulus appears.

[0036](2) Generation of EEG characteristic signals: When the target stimulus is generated, accompanied by ...

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Abstract

The invention belongs to the technical field of human-machine interaction. In order to acquire higher accuracy rate, higher information transmission rate and convenience in operation, the invention provides a method for audio-visual combined stimulation of a brain-computer interface based on covert attention, which comprises the steps of: (1) initializing a system, wherein a user is connected with computer brain-computer interface equipment through an electrode at a scalp; (2) generating a brain characteristic signal; (3) acquiring a brain electric signal; (4) processing the brain electric signal; (5) performing Fisher separability analysis; and (6) performing pattern recognition by using a support vector machine. The method is mainly used for assisting physical disabilities in operating external equipment such as computers and the like.

Description

technical field [0001] The invention belongs to the technical field of human-computer interaction, and can help disabled persons operate external devices such as computers, and in particular relates to a brain-computer interface system based on implicit attention-based combined audio-visual stimulation. Background technique [0002] The definition of Brain-Computer Interface is: "BCI (Brain-Computer Interface) is a communication control system that does not depend on the normal output channels of peripheral nerves and muscles of the brain." Among the current research results, it is mainly By collecting and analyzing human EEG signals in different states, and then using certain engineering techniques to establish a direct communication and control channel between the human brain and computers or other electronic devices, a new information exchange and control is realized. Technology can provide a way for the disabled, especially those who have lost basic language and limb mot...

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Application Information

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IPC IPC(8): G06F3/01
Inventor 李文明东许敏鹏奕伟波綦宏志万柏坤
Owner 中电云脑(天津)科技有限公司
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