Patent classifications
G
PHYSICS
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G11
INFORMATION STORAGE
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G11B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
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20/00
Signal processing not specific to the method of recording or reproducing; Circuits therefor
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G11B20/00086
Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
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G11B20/0092
involving measures which are linked to media defects or read/write errors
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G11B20/00927
wherein said defects or errors are generated on purpose, e.g. intended scratches
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G11B20/00949
said intentional errors occurring due to bad sectors, which are either physically destroyed or which are declared defective in the defect management information
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