Anti-piracy optical disc

Details Anti-piracy optical disc Anti-piracy optical disc

G - Physics

11

B

G11B 7/24 (2006.01) G11B 23/28 (2006.01) G11B 23/38 (2006.01)

Patent

CA 2663365

An anti-piracy optical disc has a parent disc (10) and a sub-disc (20). The parent disc (10) has a hole (101) and a first identification characteristic (11). The hole (101) is formed through a central region of the parent disc (10). The sub-disc (20) is removably and matchingly mounted in the hole (101) of the parent disc (10) and has a second identification characteristic (21). The second identification characteristic (21) corresponds to the first identification characteristic (11) of the parent disc (10) to form a complete pattern. The anti-piracy optical disc can only be played when checking that the first and the second identification characteristics match up.

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