System and method for multiplexing a plurality of digital program services for transmission to remote locations Patent #: 5319707
ApplicationNo. 219648 filed on 03/29/1994
US Classes:370/426, Having a signaling feature348/474, For controlling video processing (e.g., digitally assisted video)370/432, Messages addressed to multiple destinations370/473, Transmission of a single message having multiple packets380/43, Key sequence signal combined with data signal380/212, Plural video stream multiplexing380/241Having program ID or authorization
ExaminersPrimary: Marcelo, Melvin
Attorney, Agent or Firm
International ClassesH04K 001/00
AbstractIn a packet-based multiplexed communications system, a method of providing different sets of conditional access information to a remote location comprises the steps of: (a) for each different set of conditional access information, inserting the set of conditional access information into a respective sequence of transport packets and assigning a unique packet ID to the transport packet of that sequence; (b) generating a table that specifies, for each of the different sets of conditional access information, the packet ID of the transport packets that carry that set of conditional access information; and (c) transmitting the table and the transport packets that carry each of the different sets of conditional access information to the remote location along with other information bearing transport packets. A decoder at the remote location can employ the transmitted table to identify and extract the transport packets that carry a selected one of the sets of conditional access information.