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Security enhanced tiered subscription broadcast system

  • US 20060190970A1
  • Filed: 12/16/2005
  • Published: 08/24/2006
  • Est. Priority Date: 12/17/2004
  • Status: Active Grant
First Claim
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1. A method of providing a plurality of tiers of receiver privileges in a broadcast system which comprises:

  • transmitting a multiplexed signal containing at least program content, additional information and receiver commands;

    receiving the transmitted multiplexed signal; and

    demodulating at least portions of said program content, at least portions of said additional information, and at least portions of said receiver commands;

    storing at least part of said portions of said additional information; and

    substituting portions of the stored additional information for portions of said program information in response to at least some of said receiver commands to provide an output signal including program content and additional information content.

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