Patent ID: 8683504

Claim:
A method to monitor media provided by one of a plurality of media sources for presentation by an information presenting device, the method comprising: determining first information based on a video signal corresponding to the monitored media; determining second information based on an audio signal corresponding to the monitored media; and identifying the one of the plurality of media sources based on a decision tree comprising a plurality of at least three decision nodes, a first decision node of the decision tree corresponding to a first classification decision resulting from processing at least one of the first information or the second information, a second decision node of the decision tree corresponding to a second classification decision resulting from processing at least one of the first information or the second information, and a third decision node of the decision tree corresponding to a third classification decision resulting from processing at least one of the first information or the second information, the second decision node of the decision tree being selected for evaluation based on an outcome of evaluating the first decision node of the decision tree, the third decision node of the decision tree being selected for evaluation based on an outcome of evaluating the second decision node of the decision tree.