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Lead optimizing method for P300 brain-computer interface

An optimization method and machine interface technology, applied in computer components, mechanical mode conversion, user/computer interaction input/output, etc., can solve problems that cannot fully meet the P300 brain-computer interface, and reduce the risk of instability , Simplify operating procedures, reduce the effect of redundant leads

Active Publication Date: 2012-11-28
中电云脑(天津)科技有限公司
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Problems solved by technology

But there is no particularly effective method optimized specifically for the leads of the P300 BCI, and general methods cannot fully meet the needs of the P300 BCI

Method used

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  • Lead optimizing method for P300 brain-computer interface
  • Lead optimizing method for P300 brain-computer interface
  • Lead optimizing method for P300 brain-computer interface

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Embodiment Construction

[0031] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0032] In order to optimize the leads of the P300 brain-computer interface and meet the requirements of the P300 brain-computer interface, an embodiment of the present invention provides a method for optimizing the leads of the P300 brain-computer interface, which is described in detail below:

[0033] 101: Obtain the event phase locking value between the leads according to the preset number of L leads; establish the distance coefficient matrix between the leads according to the event phase locking value between the leads, and define the phase synchronization strength of each lead ;

[0034] Wherein, the preset number L of leads is set according to requirements in practical applications, and the value is a positive integer greater than...

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Abstract

The invention discloses a lead optimizing method for a P300 brain-computer interface (BCI) and relates to the technical field of the BCI. The method comprises the following steps of: acquiring an event phase locking value according to L leads with the preset number, establishing distance factor matrixes among leads according to the event phase locking value, and defining the intensity of phase synchronism among the leads; acquiring a clustering tree by a hierarchical clustering method according to the distance factor matrixes among the leads; establishing a lead importance sorted table according to the clustering tree and the intensity of phase synchronism among the leads; computing a precision rate of the lead importance sorted table, and acquiring L precision rate values; and sorting the L precision rate values, taking the lead combination with the highest precision rate value as the optimal lead combination, and outputting the optimal lead combination. In the method, the event phase locking value and the hierarchical clustering method are integrated, the number of characteristics sources is calculated and determined, the redundancy leads of a BCI system can be effectively reduced, the instability risk of the BCI system is reduced, and operation program is simplified.

Description

technical field [0001] The present invention relates to the technical field of BCI (Brain-Computer Interface, Brain-Computer Interface). BCI based on P300 characteristic signal is an important type of BCI paradigm. As an important topic of BCI technology, lead optimization has very important significance, especially It relates to a P300 brain-computer interface lead optimization method. Background technique [0002] The definition of BCI given by the First International Conference on Brain-Computer Interface is: "BCI is a communication control system that does not depend on the normal output channels of the peripheral nerves and muscles of the brain." In the current research results, it mainly collects And analyze the EEG signals of people in different states, and then use certain engineering technology to establish a direct communication and control channel between the human brain and computers or other electronic equipment, so as to realize a new information exchange and c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/01
Inventor 许敏鹏綦宏志明东孙长城安兴伟万柏坤
Owner 中电云脑(天津)科技有限公司
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