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Auxiliary program association table

  • US 7,409,702 B2
  • Filed: 03/20/2003
  • Issued: 08/05/2008
  • Est. Priority Date: 03/20/2003
  • Status: Active Grant
First Claim
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1. A method of identifying programs in a digital video communication system, comprising:

  • generating an auxiliary program association table (PAT) and an auxiliary program map table (PMT), wherein the auxiliary PAT and auxiliary PMT relate at least one program identifier (PID) to a program;

    packetizing the auxiliary PAT and auxiliary PMT and identifying packets containing the auxiliary PAT and auxiliary PMT using a designated PID;

    encoding the designated PID as private descriptor in a network information table (NIT); and

    wherein the auxiliary PAT and the auxiliary PMT are different from a conventional PAT and a conventional PMT, and, wherein the auxiliary PAT and auxiliary PMT relate at least one program identifier (PID) to at least one portion of a program encrypted with a non-legacy encryption to distinguish the at least one portion of the program encrypted with the non-legacy encryption from the at least one portion of the program encrypted with a legacy encryption.

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