198655 ⎘
Signal processing not specific to the method of recording or reproducing; Circuits therefor; Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers the original record carrier having a larger recording capacity than the potential target medium
CONTROLLED ACCESS DVD
#2Dual-deck optical disc system and copy method thereof
#3Method for copy protecting a record carrier, copy protected record carrier and means for detecting access control information
#4Information recording medium, information processing device and method