Optical disk, an optical disk barcode forming method, an optical

Cryptography – Miscellaneous

Patent

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H04L 900

Patent

active

061283886

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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