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Partial encryption and PID mapping

  • US 20030021412A1
  • Filed: 01/02/2002
  • Published: 01/30/2003
  • Est. Priority Date: 06/06/2001
  • Status: Active Grant
First Claim
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1. An encrypted television signal, comprising:

  • a plurality of encrypted samples of the television program, the samples being encrypted under a first encryption method; and

    an unencrypted portion.

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