Cryptography – Video cryptography – Copy protection or prevention
Reexamination Certificate
2007-07-17
2007-07-17
Moazzami, Nasser (Department: 2136)
Cryptography
Video cryptography
Copy protection or prevention
C713S193000, C705S057000, C720S718000
Reexamination Certificate
active
09893504
ABSTRACT:
A recording apparatus records movie content onto a DVD. The movie content is encrypted using a different encryption method depending on whether the DVD is intended for consumer use or industrial use. If the DVD is for consumer use, a VIDEO_TS directory is created on the DVD, and the encrypted movie content is recorded in the VIDEO_TS directory. If the DVD is for industrial use, a VIDEO_TS directory and an EWCPS_TS directory are created on the DVD, and the encrypted movie content and message data are recorded respectively in the EWCPS_TS directory and the VIDEO_TS directory. The message data indicates that the movie content cannot be played back by consumer DVD players.
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Katta Noboru
Kawada Hirotsugu
Miwa Katsuhiko
Mori Yoshihiro
Takata Masaaki
Moazzami Nasser
Shiferaw Eleni
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