Interactive video distribution systems – Access control or blocking – With encryption or scrambling of video signal
Reexamination Certificate
2004-01-20
2011-11-15
Kincaid, Kristine (Department: 2421)
Interactive video distribution systems
Access control or blocking
With encryption or scrambling of video signal
C725S025000, C725S080000, C725S142000, C713S158000, C348S474000, C348S552000, C380S044000, C380S279000, C380S281000, C380S286000
Reexamination Certificate
active
08060902
ABSTRACT:
The system for receiving broadcast digital data (in particular pay television services) comprises a master digital terminal (1), and at least one slave digital terminal (2) connected to the master terminal by a link (3) and able to receive protected digital data. The slave digital terminal can access the protected data only if information necessary for accessing the data and received by the master digital terminal is sent by way of link (3) to the slave digital terminal within a predetermined deadline. This information is in particular access entitlements to television services or keys for descrambling the service.
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Creusot Daniel
Cueff Jean-Maurice
Leyendecker Philippe
Kiel Paul P.
Kincaid Kristine
Parra Omar S
Shedd Robert D.
Thomson Licensing
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