Methods and apparatus for determining whether a media presentation device is in an on state or an off state using fuzzy scores and signature matches
First Claim
1. A method to determine a state of a presentation device, comprising:
- summing, via a logic circuit, a plurality of contribution values corresponding to a first cycle to generate a first intermediate fuzzy score for the first cycle, wherein the contribution values are indicative of a state of a presentation device;
storing the first intermediate fuzzy score in a circular buffer having a plurality of intermediate fuzzy scores corresponding to respective cycles;
combining, via the logic circuit, the intermediate fuzzy scores of the circular buffer for a first time period to form a final fuzzy score; and
determining whether a signature match occurred during the first time period.
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Abstract
Methods and apparatus for determining whether a media presentation device is in an on state or an off state are disclosed. A disclosed example method comprises determining first and second characteristics of a signature associated with a signal representative of media content presented via a media presentation device, evaluating the first and second characteristics to determine first and second fuzzy contribution values representing, respectively, degrees with which the first and second characteristics correspond to the media presentation device being in at least one of an on state or an off state, determining a third fuzzy contribution value based on a number of the first and second contribution values indicating the media presentation device is in one of the on or off states, and combining the first, second and third fuzzy contribution values for use in determining whether the media presentation device is in the on state or the off state.
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Citations
24 Claims
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1. A method to determine a state of a presentation device, comprising:
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summing, via a logic circuit, a plurality of contribution values corresponding to a first cycle to generate a first intermediate fuzzy score for the first cycle, wherein the contribution values are indicative of a state of a presentation device; storing the first intermediate fuzzy score in a circular buffer having a plurality of intermediate fuzzy scores corresponding to respective cycles; combining, via the logic circuit, the intermediate fuzzy scores of the circular buffer for a first time period to form a final fuzzy score; and determining whether a signature match occurred during the first time period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A tangible machine readable storage medium comprising instructions that, when executed, cause a machine to at least:
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sum a plurality of contribution values corresponding to a first cycle to generate a first intermediate fuzzy score for the first cycle, wherein the contribution values are indicative of a state of a presentation device; store the first intermediate fuzzy score in a circular buffer having a plurality of intermediate fuzzy scores corresponding to respective cycles; combine the intermediate fuzzy scores of the circular buffer for a first time period to form a final fuzzy score; and determine whether a signature match occurred during the first time period. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An apparatus to determine a state of a presentation device, comprising:
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an analyzer to sum a plurality of contribution values corresponding to a first cycle to generate a first intermediate fuzzy score for the first cycle, the fuzzy contribution values being indicative of a state of a presentation device a circular buffer to store the first intermediate fuzzy score, the circular buffer having a plurality of intermediate fuzzy scores corresponding to respective cycles, the analyzer to combine the intermediate fuzzy scores of the circular buffer for a first time period to form a final fuzzy score; and the analyzer to determine whether a signature match occurred during the first time period. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification