Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate
2006-04-04
2006-04-04
Smithers, Matthew (Department: 2137)
Cryptography
Video cryptography
Video electric signal modification
C380S042000, C380S043000, C380S044000, C380S203000, C380S205000, C380S212000, C380S239000, C380S261000, C705S050000, C705S051000, C725S031000
Reexamination Certificate
active
07023992
ABSTRACT:
In a data multiplexing device which multiplexes and transmits the transport stream packets of program data consisting of a plurality of data elements constructed in the form of transport stream packets, a program distribution system, a program transmission system, a pay broadcast system, a program transmission method, a conditional access system, and a data reception device according to the present invention, by generating a scramble key Ks corresponding to one or more data elements among the plurality of data elements constituting a program and by scrambling each data element, an audience can subscribe for each data element.
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Kubota Tatsuya
Wakatsuki Norio
Callahan Paul
Presson Thomas F.
Smithers Matthew
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