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Universal broadcast code and multi-level encoded signal monitoring system

  • US 5,425,100 A
  • Filed: 07/22/1994
  • Issued: 06/13/1995
  • Est. Priority Date: 11/25/1992
  • Status: Expired due to Term
First Claim
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1. A multi-level encoded signal monitoring system comprising:

  • a plurality of encoding means for encoding a program source signal, wherein each encoding means is located at a different corresponding level of distribution of the program source signal, wherein the encoding means at each level of distribution except at an initial level of distribution has an input for receiving the program source signal from at least one preceding level of distribution, wherein the encoding means at each level of distribution has an output for providing the program source signal to a succeeding level of distribution or to an end user, wherein each encoding means is arranged for selectively encoding information on uniquely specified segments of the program source signal, and wherein at least one uniquely specified segment is reserved for each level of distribution having a corresponding encoding means located thereat;

    means for receiving said program source signal; and

    ,means responsive to said received program source signal for decoding said encoded information on selected specified segments.

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