System and method for partially encrypted multimedia stream

System and method for partially encrypted multimedia stream

  • CN 102,045,590 B
  • Filed: 03/08/2004
  • Issued: 09/14/2016
  • Est. Priority Date: 03/31/2003
  • Status: Active Grant
First Claim
Patent Images

1. for a method for multimedia transmission, including:

  • Generate the copy of media stream, to provide, there is the first and second of identical key componentNon-encrypted stream;

    Send the first non-encrypted stream and access CA assembly (20) to first condition, to encrypt whole theOne non-encrypted stream, thus provide and encrypt stream completely, wherein a CA assembly (20) is by incumbentThe legacy component that person provides;

    The encryption version of described key component is obtained from the described stream of encryption completely;

    Use the second non-encrypted stream, utilize the 2nd CA assembly (24) to encrypt described key component,To provide local cypher stream;

    AndThe cryptography key obtained from the described stream of encryption completely is inserted partially into described local addIn close stream, in order to its transmission,Wherein, described method also includes;

    utilize away from least one PID Packet Identifier PID corresponding partiallyShifting amount determines described key component position at least in one of described stream.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×