Detection of media links in broadcast signals

Interactive video distribution systems – Use surveying or monitoring – By passively monitoring receiver operation

Reexamination Certificate

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Details

C725S015000, C725S016000, C725S017000, C725S018000, C725S020000, C725S009000

Reexamination Certificate

active

07421723

ABSTRACT:
A detection apparatus includes a tuner tuned to the program and a meter coupled to the tuner and arranged to detect content ancillary information from the program tuned by the tuner. The content ancillary information may be a media link, closed captioning information, or the like. The meter may also be arranged to extract a broadcast signature from the program. A comparator compares the broadcast signature to a reference signature selected from a library of reference signatures based upon the content ancillary information. Broadcast signatures from unknown programs may be clustered at least partially on the basis of the content ancillary information.

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