Time-multiplexed multi-program encryption system

Time-multiplexed multi-program encryption system

  • CN 1,778,062 A
  • Filed: 04/21/2004
  • Published: 05/24/2006
  • Est. Priority Date: 04/21/2003
  • Status: Active Application
First Claim
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1. one kind is used for the system that time-multiplexed multi-program is encrypted, and it is characterized in that:

  • At least one receiver (110), it is used for receiving and at least one multiplex stream of decoding;

    At least one conditional access (130) unit, it is used to encrypt at least one multiplex stream;

    At least one multiplexer (120), it is used for the selected bag of one or more multiplex stream is guided to one or more conditional access unit to encrypt, to receive from the encrypted packet of described one or more conditional access unit and with encrypted packet and synthetic one or more output stream of non-encrypted package;

    Critical packet identification means (504), it is used to discern bag to be encrypted;

    Member (506), it is used to surmount and recovers selected bag parameter;

    WithMember (506), it is used for substituting with encrypted packet the non-encrypted bag of a stream.

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