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Method and apparatus for subscription broadcast

  • US 4,890,322 A
  • Filed: 08/17/1988
  • Issued: 12/26/1989
  • Est. Priority Date: 02/23/1984
  • Status: Expired due to Term
First Claim
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1. Electronic apparatus of the type comprising:

  • means for receiving a program signal in an enciphered form from a signal carrier;

    means requiring a predetermined deciphering key for selectively deciphering the program signal and sending it to a receiver instrument,means for controlling the activation of the deciphering means;

    means for storing an external request to order said program signal;

    means operative subsequent to receipt of said order for establishing a telephone connection to a predetermined telephone service number associated with a central ordering facility contained within a public switched telephone network and for receiving from said central ordering facility via said telephone connection said predetermined deciphering key, andmeans responsive to receipt of an activation signal delivered subsequently with said enciphered program signal for activating said means for deciphering.

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