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Asynchronous brain-computer interactive control method for EEG signal

A brain-computer interaction and EEG signal technology, applied in the field of information processing, can solve problems such as large delays in the system, and achieve the effects of improving reliability, improving robustness, and increasing the number of samples

Inactive Publication Date: 2010-12-22
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

"OptimizingSpatialFiltersforRobustEEGSingle-TrialAnalysis" (robust single-shot EEG analysis based on optimized spatial filtering) published by BenjaminBlankertz et al. in "IEEESIGNALPROCESSINGMAGAZINE". Type 3 commands, because the length of a single EEG is 3.5 seconds, there is a large delay in the system

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  • Asynchronous brain-computer interactive control method for EEG signal
  • Asynchronous brain-computer interactive control method for EEG signal
  • Asynchronous brain-computer interactive control method for EEG signal

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Embodiment Construction

[0032] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0033] Such as figure 1 As shown, this embodiment includes the following steps:

[0034] The first step, brain signal data collection:

[0035] Before the user uses the brain-computer interaction system for the first time, a large number of EEG signals of the user must be collected as training samples. In this example, g.Tec EEG acquisition equipment is used to realize brain-computer interaction based on the paradigm of motor imagination, so only 6 electrode positions (C3, Cp3, C4, Cp4, Cz, Cpz) in the motor and perception areas are collected. During the acquisition process, the user stares at the screen and kee...

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Abstract

The invention relates to a control method in the information processing technical field, in particular to an asynchronous brain-computer interactive control method for an EEG signal. The method comprises the following steps: acquiring EEG signal data under a continuous motion imagery condition; re-sampling training data; extracting features and establishing a classifier model; carrying out on-line feature projection and pattern classification; calculating duration time in a current status according to dynamic change of the duration time by a post-processing technology; and forming closed brain-computer interactive control by asynchronous brain-computer interactive control and neural feedback. The asynchronous brain-computer interactive control method reduces interactive retardance, improves fault-tolerant capability, breaks through a discrete command control mode, and enhances brain-computer interactive flexibility, and can provide a direct brain-computer interactive communication technology for the handicapped or patients with dyskinesia.

Description

technical field [0001] The present invention relates to a control method in the technical field of information processing, in particular to an asynchronous brain-computer interaction control method of EEG signals. Background technique [0002] Brain-computer interaction (BCI, BrainComputerInterface) refers to the realization of the communication and control functions between the brain and computers or other electronic devices based on brain signals. Different from general human-computer interaction, brain-computer interaction does not require the brain to control the peripheral muscles of the body to express the information to be transmitted by the brain, but to establish a way to directly detect changes in brain signals without passing through the peripheral nervous system, and obtain brain Novel control channels for mental information. Therefore, real-time brain-computer interaction can replace part of the sensory and motor functions lost due to injury or paralysis, and h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/01G06K9/00G06K9/66
Inventor 赵启斌张丽清李俊华
Owner SHANGHAI JIAO TONG UNIV
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