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Use of messages in or associated with program signal streams by set-top terminals

  • US 20040040035A1
  • Filed: 05/01/2003
  • Published: 02/26/2004
  • Est. Priority Date: 05/03/2002
  • Status: Active Grant
First Claim
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1. A method of operating a communications system comprising receiving devices coupled to respective display devices at user locations, the method comprising:

  • broadcasting a program signal stream to a receiving device, the program signal stream comprising at least one embedded, encrypted segmentation message to indicate an expanse of a portion of the program signal stream for insertion of advertising, and at least one embedded decoy message;

    decrypting the at least one segmentation message by the receiving device;

    identifying the expanse by the receiving device based, at least in part, on the at least one decrypted segmentation message; and

    inserting advertising in the expanse by the receiving device.

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