Apparatus and method for recognizing positive/negative intention using fine change of gamma wave of brainwave

• US 7,162,295 B2
• Filed: 03/16/2004
• Issued: 01/09/2007
• Est. Priority Date: 12/22/2003
• Status: Expired due to Fees

• Current Assignee: Coopersurgical Incorporated (The Cooper Cos., Inc.)
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Song, Yoon Seon, Nam, Seung Hoon, Ryu, Chang Su, Yim, Tae Gyu, Ryu, Chang Yong
• Primary Examiner(s): Marmor, II; Charles A
• Assistant Examiner(s): Baxter; Zoe E
• Application Number:
  US10/800,763
• Publication Number:
  US 20050137493A1
• Time in Patent Office: 1,029 Days
• Field of Search: 600/544, 600/545
• US Class Current: 600/544
• CPC Class Codes: G06F 3/015 Input arrangements based on nervous system activity detection, e.g. brain waves [EEG] detection, electromyograms [EMG] detection, electrodermal response detection

Abstract

Provided are an apparatus and a method for recognizing positive/negative intention using a fine change of gamma wave of a brainwave comprising the steps of detecting the brainwave from a head of a user, receiving and amplifying the brainwave detected from the step of detecting the brainwave, converting the amplified analog brainwave to one of a digital type, and recognizing the positive/negative intention of the user by detecting the fine change of the gamma wave of the brainwave in the digital type, which is transmitted from the A/D converting portion, whereby it is possible to implement an application of a real time interface and minimizes inconvenience for the user, and it requires no separate user practice.

Claims

1. An apparatus for recognizing positive/negative intention using a fine change of gamma wave of a brainwave, comprising:

a brainwave detecting portion for detecting the brainwave from a head of a user;

a brainwave amplifying portion for amplifying the brainwave detected from the brainwave detecting portion;

an A/D converting portion for converting the amplified brainwave received from the brainwave amplifying portion to one of a digital type; and

a recognizer for recognizing the positive/negative intention of the user by detecting the fine change of the gamma wave of the brainwave in the digital type, which is transmitted from the A/D converting portion;

wherein the recognizer is configured to;

receive the brainwave of the digital type;

calculate the fine change of frequency components included in the gamma wave band from the brainwave of the digital type; and

determine positive/negative and presence/absence of the intention in response to the fine change; and

wherein the fine change of the frequency components is calculated to be [P(first frequency)−

P(second frequency)]/[P(first frequency)+P(second frequency)] or P(first frequency)/[P(first frequency)+P(second frequency)], and the first and the second frequencies are ones of the gamma wave band.

2. The apparatus as claimed in claim 1,further comprising a control portion for generating control commands to a peripheral output device in response to the positive/negative intention recognized in the recognizer.

3. The apparatus as claimed in claim 2, wherein the brainwave detecting portion has an electrode that is adapted to be worn at a left frontal area of the user'"'"'s head.

4. The apparatus as claimed in claim 2, wherein the brainwave detecting portion has an electrode that is adapted to be worn at a left frontal area of the user'"'"'s head.

5. The apparatus as claimed in claim 1, wherein the brainwave detecting portion has an electrode that is adapted to be worn at a left frontal area of the user'"'"'s head.

6. The apparatus as claimed in claim 1, further comprising a control portion for generating control commands to a peripheral output device in response to the positive/negative intention recognized in the recognizer.

7. The apparatus as claimed in claim 1, wherein the brainwave detecting portion has an electrode that is adapted to be worn at a left frontal area of the user'"'"'s head.

8. A method for recognizing positive/negative intention using a fine change of gamma wave of a brainwave, comprising:

a step of detecting a brainwave from a head of a user;

a step of receiving and amplifying the brainwave detected from the step of detecting the brainwave;

a step of converting the amplified analog brainwave to one of a digital type; and

a step of recognizing the positive/negative intention of the user by detecting the fine change of the gamma wave of the brainwave in the digital type, which is transmitted from the A/D converting portion;

wherein the recognition step includes;

a step of receiving the brainwave of the digital type;

a step of calculating the fine change of frequency components included in the gamma wave band from the brainwave of the digital type; and

a step of determining positive/negative and presence/absence of the intention in response to the fine change; and

wherein the fine change of the frequency components is calculated to be [P(first frequency)−

P(second frequency)]/[P(first frequency)+P(second frequency)] or P(first frequency)/[P(first frequency)+P(second frequency)], and the first and the second frequencies are ones of the gamma wave band.

9. The method as claimed in claim 8, further comprising a step of controlling for generating control commands to a peripheral output device in response to the positive/negative intention recognized in the step of recognizing the positive/negative intention.

10. The method as claimed in claim 9, wherein the recognition of the positive/negative intention in the recognition step is performed such that the fine change of an output of each frequency within a gamma wave band is sensed.

11. The method as claimed in claim 10, wherein the gamma wave band is in the range of 32 Hz to 40 Hz.

12. The method as claimed in claim 9, wherein the recognition step includes:

a step of receiving the brainwave of the digital type;

a step of calculating the fine change of frequency components included in the gamma wave band from the brainwave of the digital type; and

a step of determining positive/negative and presence/absence of the intention in response to the fine change.

13. The method as claimed in claim 8, wherein the recognition of the positive/negative intention in the recognition step is performed such that the fine change of an output of each frequency within a gamma wave band is sensed.

14. The method as claimed in claim 8 wherein the determination step includes:

a step of determining that the intention is present when two peaks higher than a first predetermined threshold value are present, and that the intention is not present when the two peaks are not present; and

a step of determining the positive/negative intention by comparing a second predetermined threshold value with a distance between the two peaks.

15. A method for recognizing positive/negative intention using a fine change of gamma wave of a brainwave, comprising:

a step of detecting a brainwave from a head of a user;

a step of receiving and amplifying the brainwave detected from the step of detecting the brainwave;

a step of converting the amplified analog brainwave to one of a digital type; and

a step of recognizing the positive/negative intention of the user by detecting the fine change of the gamma wave of the brainwave in the digital type, which is transmitted from the A/D converting portion;

wherein the recognition step includes;

a step of receiving the brainwave of the digital type;

a step of calculating the fine change of frequency components included in the gamma wave band from the brainwave of the digital type; and

a step of determining positive/negative and presence/absence of the intention in response to the fine change; and

wherein the determination step includes;

a step of determining that the intention is present when two peaks higher than a first predetermined threshold value are present, and that the intention is not present when the two peaks are not present; and

a step of determining the positive/negative intention by comparing a second predetermined threshold value with a distance between the two peaks.

16. The method as claimed in claim 15, further comprising a step of controlling for generating control commands to a peripheral output device in response to the positive/negative intention recognized in the step of recognizing the positive/negative intention.

17. The method as claimed in claim 16, wherein the recognition of the positive/negative intention in the recognition step is performed such that the fine change of an output of each frequency within a gamma wave band is sensed.

18. The method as claimed in claim 17, wherein the gamma wave band is in the range of 32 Hz to 40 Hz.

19. The method as claimed in claim 16, wherein the recognition step includes:

a step of receiving the brainwave of the digital type;

a step of calculating the fine change of frequency components included in the gamma wave band from the brainwave of the digital type; and

a step of determining positive/negative and presence/absence of the intention in response to the fine change.

20. The method as claimed in claim 15, wherein the recognition of the positive/negative intention in the recognition step is performed such that the fine change of an output of each frequency within a gamma wave band is sensed.

21. The method as claimed in claim 15, wherein the fine change of the frequency components is calculated to be [P(first frequency)−

P(second frequency)]/[P(first frequency)+P(second frequency)] or P(first frequency)/[P(first frequency)+P(second frequency)], and the first and the second frequencies are ones of the gamma wave band.

22. An apparatus for recognizing positive/negative intention using a fine change of gamma wave of a brainwave, comprising:

a brainwave detecting portion for detecting the brainwave from a head of a user;

a brainwave amplifying portion for amplifying the brainwave detected from the brainwave detecting portion;

an A/D converting portion for converting the amplified brainwave received from the brainwave amplifying portion to one of a digital type; and

a recognizer for recognizing the positive/negative intention of the user by detecting the fine change of the gamma wave of the brainwave in the digital type, which is transmitted from the ND converting portion;

wherein the recognizer is configured to;

receive the brainwave of the digital type;

calculate the fine change of frequency components included in the gamma wave band from the brainwave of the digital type; and

determine positive/negative and presence/absence of the intention in response to the fine change; and

wherein the determination includes;

determining that the intention is present when two peaks higher than a first predetermined threshold value are present, and that the intention is not present when the two peaks are not present; and

determining the positive/negative intention by comparing a second predetermined threshold value with a distance between the two peaks.