Patent ID: 7302419

Claim:
A method of dynamically determining the demographic identity of an individual operating a set-top box, comprising the steps of: monitoring set-top box events for a plurality of set-top boxes; correlating set-top box events with demographic characteristics; applying with a computer inverse demographic matrix calculation techniques to determine probabilities for demographic characteristic and set-top box event dataset correlations without knowing individual-specific demographic information pertaining to the set-top box event dataset; ascribing demographic characteristic probabilities to each set-top box over time based on observed set-top box events and their relationship to such inverse demographic matrix probabilities; evaluating such ascribed demographic characteristics probabilities over time through statistical analysis; fitting probabilities ascribed to demographic characteristics to statistically determine the most likely set of constant dataset possibilities for each set-top box; fitting set-top box possibility sets to inverse demographic matrix probability sets for a set-top box event; storing the demographic identities in an array over time; and applying statistical analysis to the array to determine predominant demographic identities for a given set-top box.