198696 ⎘
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 encryption or decryption of contents recorded on or reproduced from a record carrier the cryptographic key used for encryption and/or decryption of contents recorded on or reproduced from the record carrier being read from a specific source wherein the key is stored on the record carrier the key being stored in sync patterns
Optical disk reproduction apparatus, optical disk reproduction method, reproduction processing device and reproduction processing method
#2Data recording method and device, data recording medium, data reproduction method and device, data transmission method and device, and data reception method and device