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Set top box for receiving and decryption and descrambling a plurality of satellite television signals

  • US 5,742,680 A
  • Filed: 11/13/1995
  • Issued: 04/21/1998
  • Est. Priority Date: 11/13/1995
  • Status: Expired due to Fees
First Claim
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1. A home satellite television receiving system for receiving and decrypting signals transmitted from a plurality of different satellites, the system comprising:

  • an antenna system for simultaneously receiving first and second encrypted television signals from first and second satellites respectively, said first and second signals having different types of encryption whereby said first signal has a first encryption and said second signal has a second encryption;

    a switch for allowing a user or viewer to select one of said first and second signals for viewing;

    a decrypting device simultaneously housing first and second removable smart cards, said first smart card including a memory for storing a first decrypting algorithm for decrypting said received first signal having said first encryption, and said second smart card including a second decrypting algorithm for decrypting said received second signal having said second encryption whereby the signal selected for viewing by the user or viewer, whether said first signal or said second signal, is decrypted using the appropriate smart card and thereafter forwarded for viewing.

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