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Information delivery in a multi-stream digital broadcasting system

  • US 7,085,377 B1
  • Filed: 07/30/1999
  • Issued: 08/01/2006
  • Est. Priority Date: 07/30/1999
  • Status: Expired due to Term
First Claim
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1. A method of delivering information, the method comprising the step of:

  • delivering at least a portion of the information to a receiver in an at least partially-encrypted format using multiple bitstreams of a digital communication system, such that access to the information is provided at a first quality level;

    wherein the multiple bitstreams are transmitted in subbands of one or more digital sidebands of a carrier signal in the system; and

    wherein upon decryption of the at least partially-encrypted format, access to the information is provided at another quality level.

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