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Brain wave identification method adjusting device and method

An identification method and a technology for adjusting a device, applied in the field of interface systems, can solve the problems of inability to ensure that the user pays attention to calibration stimuli, inability to measure user states such as arousal, inability to change identification standards, etc., so as to eliminate missed calibration stimuli, Improved operability and high recognition rate

Active Publication Date: 2009-08-12
PANASONIC CORP
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  • Application Information

AI Technical Summary

Problems solved by technology

The existing calibration method is effective for correcting the error of the measurement equipment, but since the state of the user such as the degree of arousal cannot be measured, the recognition standard cannot be changed according to the degree of user's arousal
[0015] In addition, in the case of operating a device based on an electroencephalogram interface, since the visual P3 component corresponding to the visually presented menu item is used, visual stimulation has been presented as a stimulus for calibration in the past. However, in the interface conditions, for example, when As when operating the TV while eating, the user's attention cannot be guaranteed to the calibration stimulus, and there is a problem that the correct calibration cannot be achieved.

Method used

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  • Brain wave identification method adjusting device and method
  • Brain wave identification method adjusting device and method
  • Brain wave identification method adjusting device and method

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Embodiment approach 1

[0072] Figure 4The configuration of the functional modules of the electroencephalogram interface system 1 according to the present embodiment is shown. The electroencephalogram interface system 1 includes an output unit 3 , a recognition method adjustment device 10 , a biological signal measurement unit 50 , and an electroencephalogram interface (IF) unit 100 . Figure 4 Detailed functional blocks of the adjustment device 10 are also shown. For ease of illustration, the modules of user 5 are also shown.

[0073] The output unit 3 has a screen 3a and a speaker 3b.

[0074] In the present embodiment, auditory stimuli are presented from the speaker 3b while the menu item is displayed on the screen 3a as the stimuli for calibration, and the vision in the electroencephalogram interface is adjusted using the P3 component of the event-related potential corresponding to the auditory stimuli for calibration. Methods of identifying P3 components. As a result, it is possible to perf...

Embodiment approach 2

[0127] In the electroencephalogram interface system 1 according to the first embodiment, the stimulation presentation unit 11 presents auditory stimulation for calibration simultaneously with the presentation of the menu item by the electroencephalogram interface unit 100 . As a result, it is possible to adjust the identification method according to the user state or the electrode attachment state before the electroencephalogram interface is used.

[0128] However, as described above, since the event-related potential S / N is low, when the stimulus for calibration is presented and large noise such as electro-oculogram is mixed, there is a possibility that calibration cannot be performed accurately.

[0129] In the electroencephalogram interface system according to the present embodiment, the auditory stimulation for calibration is presented at random timing or predetermined timing, not limited to before the electroencephalogram interface is used. Then, the user's state or the e...

Embodiment approach 3

[0150] In the interface systems according to Embodiments 1 and 2, the case where calibration is performed using auditory stimuli such that the user does not miss calibration stimuli has been described.

[0151] However, the brainwave interface system in addition to figure 1 In addition to the stand-alone device such as the shown TV2, a portable device can be constructed as an operation object. When you go out with a portable device and want to use the brain wave interface system to operate, for example, even if an auditory stimulus is prompted in a crowd or in a train, it may be missed. In addition, there are cases in which auditory stimuli should not be presented for polite reasons. As a result, it may not be possible to perform proper calibration using auditory stimuli.

[0152] The electroencephalogram interface system 150 of the present embodiment does not present auditory stimuli, but presents somatosensory sensations as calibration stimuli. If it is a somatosensory st...

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Abstract

A system having an interface using a brain wave, in which there is no oversight of stimulation for calibration about a brain wave and high-accuracy calibration is realized. A brain wave interface system (1) comprises an interface section (100) for acquiring a brain wave of a user, identifying the P3 component of a visual event-related potential contained in the brain wave signal after an operation menu is presented, and allowing a device to operate according to the identified P3 component. A brain wave identification method adjusting device (10) is used for adjusting the identification method of the interface section (100). With reference to a database (13) defining the correlation between the P3 component of the event-related potential acquired by the stimulation to a modality other than the eyesight and the P3 component of visual event-related potential and the P3 component of the event-related potential after the stimulation is presented, the device (10) derives a feature value of the user in respect of the P3 component of the visual event-related potential and adjusts the brain wave identification method of the interface section (100) according to the feature value.

Description

technical field [0001] The present invention relates to an interface (electroencephalogram interface) system capable of operating equipment using electroencephalograms. More specifically, it relates to an electroencephalogram interface system equipped with a calibration device for measuring a user's electroencephalogram in real time for accurate analysis. Background technique [0002] In recent years, since various information devices such as televisions, mobile phones, and PDAs (Personal Digital Assistant) have been popularized and entered people's lives, users need to operate information devices in many situations in daily life. Usually, the user operates the device by manually inputting instructions through an input mechanism (interface unit) such as a button. However, when, for example, housework, childcare, or driving, both hands cannot be free due to tasks other than device operation, it is difficult to realize input using the interface unit, and the device cannot be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/01A61B5/0476
CPCA61B5/0476G06F3/015A61B5/04842A61B5/378A61B5/369A61B5/372
Inventor 足立信夫森川幸治
Owner PANASONIC CORP
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