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Receiving apparatus

  • US 7,397,921 B2
  • Filed: 07/16/2003
  • Issued: 07/08/2008
  • Est. Priority Date: 07/19/2002
  • Status: Expired due to Fees
First Claim
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1. A receiving apparatus, comprising:

  • a demultiplexer that separates a multiplexed signal containing first encrypted data into at least the first encrypted data and program-specific information;

    a tool list demultiplexor that separates a tool list having a tool identification indicating a decoding tool for decrypting the first encrypted data from the multiplexed signal;

    a control graph demultiplexor that separates a control graph indicating an instantiated location of the decoding tool in the receiving apparatus from the multiplexed signal;

    a rights information demultiplexor that demultiplexes rights information for the first encrypted data from the multiplexed signal, the rights information specifying at least one of rights for a permitted number of accesses and rights for editing in the receiving apparatus;

    a first controller that acquires a tool according to the tool identification acquired from the tool list, and instantiating the tool according to the control graph;

    a first rights manager that processes the first encrypted data according to the rights information;

    a second rights manager that separates the rights information into first rights information and second rights information; and

    a multiplexing adjustor that modifies the rights information in the multiplexed signal, and that outputs a revised multiplexed signal,wherein the revised multiplexed signal is output to a second receiving apparatus in accordance with a request signal from the second receiving apparatus.

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