Interactive video distribution systems – Access control or blocking – With encryption or scrambling of video signal
Reexamination Certificate
2002-10-25
2009-10-06
Hirl, Joseph P (Department: 2426)
Interactive video distribution systems
Access control or blocking
With encryption or scrambling of video signal
C380S278000
Reexamination Certificate
active
07600238
ABSTRACT:
The invention concerns a method for verifying television receiver sets with access control and a corresponding receiver set. The invention is characterized in that a broadcaster performs parametered calculations, for example through the subscriptions and the characteristics of the receiver sets. The results of said calculations are transmitted to the receiver set which store them. In order to verify a receiver, the broadcaster transmits thereto the parameter(s) used, the receiver performs the calculation and compares the result it obtains with that which it has stored. In case of non-conformity, the receiver set modifies its operating conditions. The invention is applicable to television with access control.
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Indian First Examination Report for Patent Application No. 866/CHENP/2004, dated Jan. 5, 2009, 2 pages.
Alam Mushfikh
Hirl Joseph P
Nagra Thomson Licensing
Osha • Liang LLP
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