Sensory-driven controller
First Claim
1. A method for detecting the point of attention of a subject who is attending to a stimulus, comprising the steps of:
- establishing a calibrated response template unique to the subject representing the correspondence between a stimulus and an evoked response;
providing a stimulus for evoking an EEG response in a subject;
detecting the EEG response evoked from the subject by the stimulus;
mathematically corelating the EEG response with the template to derive the template response that corresponds to the EEG response; and
determining the point of attention of said subject from said mathematical correlation.
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Abstract
A non-motive system for enabling a person to carry out a function includes circuitry designed to detect evoked-response potentials as a result of stimuli presented to the person. Each element of the stimulus corresponds to an external factor or function, so that the person attending to a particular element may communicate his desire that the external factor or function corresponding to that element be carried out merely through the detection of his brain wave response to the stimulus. The brain wave response is detected by electrodes, conditioned, and correlated with a precalibrated set of response template signals to derive the element attended by the subject, and thereby cause the indicated factor or function to be carried out.
96 Citations
16 Claims
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1. A method for detecting the point of attention of a subject who is attending to a stimulus, comprising the steps of:
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establishing a calibrated response template unique to the subject representing the correspondence between a stimulus and an evoked response; providing a stimulus for evoking an EEG response in a subject; detecting the EEG response evoked from the subject by the stimulus; mathematically corelating the EEG response with the template to derive the template response that corresponds to the EEG response; and determining the point of attention of said subject from said mathematical correlation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for detecting the point of attention of a subject responding to a stimulus, comprising the steps of:
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providing sensors for sensing the EEG response of a subject to a stimulus, said sensors providing a sensor response signal comprising at least two trial electrical signals representing said EEG response; conditioning the sensor response signal, including amplifying, filtering and digitizing to produce a conditioned output signal; processing the conditioned signal to reduce noise and suppress artifacts, thereby producing a processed evoked-response potential signal representing the EEG response; deriving a response template for comparison with the processed evoked-response potential; mathematically correlating the processed evoked-response potential signal with the response template to determine the similarity in at least one aspect between the processed evoked-response potential signal and the response template, and providing a correlated output signal representing the degree of similarity between the two signals; and deriving the point of attention indicated by the correlated output signal.
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16. A system for determining the point of attention of a subject responding to a stimulus, comprising:
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sensor means for sensing an EEG response evoked by a stimulus and for producing an electrical signal unique to that stimulus; amplifier means for receiving and filtering the amplified sensor signals; filter means for receiving and filtering the amplified sensor signals; digitizing means for receiving and digitizing the filtered signal; means for reducing noise and suppressing artifacts in the digitized filtered signal and to output an evoked-response potential signal; template means for providing a response template for comparison with the evoked-response potential signal; correlator means for eliciting signal differences between the evoked-response potential signal and the response template and to output a correlator output signal; and means for deriving the point of attention indicated by the correlator output signal.
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Specification