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

摘要

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.

主权项

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.