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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

  • US 9,312,973 B2
  • Filed: 04/11/2012
  • Issued: 04/12/2016
  • Est. Priority Date: 09/30/2008
  • Status: Active Grant
First Claim
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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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