Cryptography – Video cryptography – Copy protection or prevention
Reexamination Certificate
2005-04-29
2009-06-30
Zand, Kambiz (Department: 2439)
Cryptography
Video cryptography
Copy protection or prevention
C713S153000, C713S154000, C713S160000, C713S163000, C713S182000, C726S001000, C726S002000, C726S003000, C726S011000, C726S013000, C380S217000, C380S241000
Reexamination Certificate
active
07555123
ABSTRACT:
Processing an MPEG elementary stream contained in multiple PID streams in a conditional access overlay environment. A multi-program transport stream contains numerous video and audio elementary streams. Critical packets in the elementary streams are encrypted with two different encryption schemes creating a stream having multiple PID values. The streams are then sent from the headend to individual set-top boxes. One encryption scheme can be decoded by the incumbent set-top box and the second encryption scheme can be decoded by the overlay set-top box. The overlay set-top box uses a dual filter system to filter and decode the PIDs for each video and audio stream of the desired program.
REFERENCES:
patent: 2002/0196939 (2002-12-01), Unger et al.
patent: 2003/0021412 (2003-01-01), Candelore et al.
patent: 2003/0026423 (2003-02-01), Unger et al.
patent: 2003/0081776 (2003-05-01), Candelore
patent: 2006/0262926 (2006-11-01), Candelore et al.
patent: 2006/0269060 (2006-11-01), Candelore et al.
Hopper Jeffrey C.
Pinder Howard G.
Jackson Jenise E
Merchant & Gould
Scientific-Atlanta, Inc.
Zand Kambiz
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