DETECTION OF MEDIA LINKS IN BROADCAST SIGNALS

摘要

A detection apparatus (12) includes tuner (14) tuned to the program and a meter (17) coupled to the tuner and arranged to detect content ancillary information from the program tuned by the tuner (14). The content ancillary information may be a media link, closed captioning information, or the like. The meter (17) 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.