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

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

1999-11-16

2000-12-12

Swann, Tod R.

Cryptography

Video cryptography

Copy protection or prevention

380201, 713193, 705 51, 705 57, H04N 7167

Patent

active

061608882

ABSTRACT:
Data is recorded on an optical disk. In a prescribed region of the disk, an identifier is provided for indicating whether a barcode-like mark is present or not on the disk. The identifier and the barcode-mark are in different locations on the disk. A control area, in which physical feature information regarding the disk is recorded, is included in the prescribed region.

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