A system communicates video information including television content associated with a plurality of channels and ancillary information. Information may be transmitted with the ancillary information that is indicative of the type of content included in the ancillary information. This provides the user,...http://www.google.es/patents/US8001569?utm_source=gb-gplus-sharePatente US8001569 - Identifying ancillary information associated with an audio/video program
Identifying ancillary information associated with an audio/video program
