Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate
2011-03-22
2011-03-22
Truong, Thanhnga B (Department: 2438)
Cryptography
Video cryptography
Video electric signal modification
C726S030000, C375S240260, C375S240280
Reexamination Certificate
active
07912219
ABSTRACT:
Essential data elements, particularly entitlement control messages (ECMs), are inserted in a manner that reduces the overhead bit rate without effecting overall tuning time at the customer receiver or security in satellite, cable or other programming networks. ECMs are inserted into the transport stream by detecting random access points (RAPS) in the encoded programming and inserting the ECM packets in a window just ahead of the RAP.
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Basse Hanno
Kahn Raynold M.
Klauss Peter M.
Michener James A.
Lee Jason
The DIRECTV Group Inc.
Truong Thanhnga B
LandOfFree
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