OPTICAL DISK, AN OPTICAL DISK BARCODE FORMING METHOD, AN...

Details OPTICAL DISK, AN OPTICAL DISK BARCODE FORMING METHOD, AN... OPTICAL DISK, AN OPTICAL DISK BARCODE FORMING METHOD, AN...

2006-09-05

2006-09-05

Morse, Gregory (Department: 2137)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

By stored data protection

C380S201000, C380S203000, C705S051000, C705S057000, C369S275300, C369S275400, C369S278000, C235S462030, C235S494000, C235S454000

Reexamination Certificate

active

07103781

ABSTRACT:
Disclosed is an optical disk barcode forming method wherein, as information to be barcoded, position information for piracy prevention, which is a form of ID, is coded as a barcode and is recorded by laser trimming on a reflective film in a PCA area of an optical disk. When playing back the thus manufactured optical disk on a reproduction apparatus, the barcode data can be played back using the same optical pickup.

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