Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate
2006-07-25
2006-07-25
Moise, Emmanuel L. (Department: 2137)
Cryptography
Video cryptography
Video electric signal modification
C725S031000, C725S086000
Reexamination Certificate
active
07082197
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
Frommer William S.
Frommer Lawrence & Haug
Moise Emmanuel L.
Nguyen Minh Dieu
Sony Corporation
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