Device and method for deciding necessity of brainwave identification
First Claim
1. An apparatus in an electroencephalogram interface system, the system havingan output section for visually presenting a manipulation menu for a device,a biological signal measurement section for acquiring an electroencephalogram signal from a user, andan electroencephalogram interface section for presenting via the output section menu items of the manipulation menu with a specific switching frequency, wherein the switching frequency is the frequency at which the menu items are presented, and distinguishing a component of an event-related potential which is contained in the electroencephalogram signal after each menu item is highlighted, and operating the device based on the distinguished event-related potential,the apparatus for adjusting a distinction method for the electroencephalogram signal to be adopted in the electroencephalogram interface section comprising:
- a frequency analysis section for calculating a representative frequency at which a frequency power of the electroencephalogram signal becomes maximal; and
a determination section for calculating a relative quantity between the switching frequency of the menu items and the representative frequency of the electroencephalogram signal, and comparing the relative quantity to a threshold value to determine whether the representative frequency is related to switching of the menu items or not, and in accordance with the result of the determination, outputting to the electroencephalogram interface section an instruction to adjust the distinction method for the electroencephalogram signal to be adopted in the electroencephalogram interface section.
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Accused Products
Abstract
In a system having an interface which utilizes electroencephalogram, it is determined whether the user was looking at a menu or not based on the frequency of the user electroencephalogram, and the electroencephalogram is excluded from the subject of distinction in the case where the user is not looking at the menu.
A distinction necessity determination apparatus 10 for determining whether or not to perform a distinction of an electroencephalogram signal in an electroencephalogram interface system 1 includes a frequency analysis section 11 for calculating a representative frequency at which frequency power of the electroencephalogram signal becomes maximal, and a determination section 12. Based on a relative quantity between the switching frequency of menu items and the representative frequency of the electroencephalogram signal, the determination section 12 determines whether the representative frequency is related to switching of the menu items or not, and based on the result of determination, outputs to an electroencephalogram interface section 100 an instruction to adjust the distinction method for the electroencephalogram signal to be adopted in the electroencephalogram interface section 100.
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Citations
19 Claims
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1. An apparatus in an electroencephalogram interface system, the system having
an output section for visually presenting a manipulation menu for a device, a biological signal measurement section for acquiring an electroencephalogram signal from a user, and an electroencephalogram interface section for presenting via the output section menu items of the manipulation menu with a specific switching frequency, wherein the switching frequency is the frequency at which the menu items are presented, and distinguishing a component of an event-related potential which is contained in the electroencephalogram signal after each menu item is highlighted, and operating the device based on the distinguished event-related potential, the apparatus for adjusting a distinction method for the electroencephalogram signal to be adopted in the electroencephalogram interface section comprising: -
a frequency analysis section for calculating a representative frequency at which a frequency power of the electroencephalogram signal becomes maximal; and a determination section for calculating a relative quantity between the switching frequency of the menu items and the representative frequency of the electroencephalogram signal, and comparing the relative quantity to a threshold value to determine whether the representative frequency is related to switching of the menu items or not, and in accordance with the result of the determination, outputting to the electroencephalogram interface section an instruction to adjust the distinction method for the electroencephalogram signal to be adopted in the electroencephalogram interface section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. In an electroencephalogram interface system having
an output section for visually presenting a manipulation menu for a device, a biological signal measurement section for acquiring an electroencephalogram signal from a user, and an electroencephalogram interface section for presenting via the output section menu items of the manipulation menu with a specific switching frequency, wherein the switching frequency is the frequency at which the menu items are presented, and distinguishing a component of an event-related potential which is contained in the electroencephalogram signal after each menu item is highlighted, and operating the device based on the distinguished event-related potential, a distinction necessity determination method for determining whether or not to allow the electroencephalogram interface section to perform a distinction of the electroencephalogram signal, comprising the steps of: -
calculating as a representative frequency at which a frequency power of the electroencephalogram signal becomes maximal; and calculating a relative quantity between the switching frequency of the menu items and the representative frequency of the electroencephalogram signal, and comparing the relative quantity to a threshold value to determine whether the representative frequency is related to switching of the menu items or not; instructing, when it is determined as being related, the electroencephalogram interface section to adopt the electroencephalogram signal as subject of distinction; and instructing, when it is determined as not being related, the electroencephalogram interface section to exclude the electroencephalogram signal from the subject of distinction. - View Dependent Claims (16, 17, 18)
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19. An apparatus in an electroencephalogram interface system, the system having
an output section for visually presenting a manipulation menu for a device, a biological signal measurement section for acquiring an electroencephalogram signal from a user, and an electroencephalogram interface section for presenting via the output section menu items of the manipulation menu with a specific switching frequency, wherein the switching frequency is the frequency at which the menu items are presented, and distinguishing a component of an event-related potential which is contained in the electroencephalogram signal after each menu item is highlighted, and operating the device based on the distinguished event-related potential, the apparatus for adjusting a distinction method for the electroencephalogram signal to be adopted in the electroencephalogram interface section, comprising: -
a frequency analysis section for calculating a representative frequency at which a frequency power of the electroencephalogram signal becomes maximal; and a determination section for calculating a relative quantity between the switching frequency of menu items and the representative frequency of the electroencephalogram signal, and comparing the relative quantity to a threshold value to determine whether the representative frequency is related to switching of the menu items or not, judging that the user is looking at the menu item when the representative frequency is determined as being related and judging that the user is not looking at the menu item when the representative frequency is determined as not being related, and adjusting the distinction method of the electroencephalogram interface section for the electroencephalogram signal in accordance with the result of determination.
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Specification