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Method for television scrambling

  • US 4,993,066 A
  • Filed: 02/26/1987
  • Issued: 02/12/1991
  • Est. Priority Date: 02/26/1987
  • Status: Expired due to Term
First Claim
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1. In a device incorporating a scrambling transmitter and a receiver incorporating an unscrambling circuit having key elements for secured passage of a signal, the improvement of means to incorporate more than one scrambling technique into the scrambling transmitter and means for the selective interchange of the key elements of the unscrambling circuit so as to allow selective reception of the signals incorporating the differing scrambling techniques.

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  • 6 Assignments
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