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AssigneeSony Corporation
InventorsYoshiyuki Kajiwara, Shoei Kobayashi
Estimating the term…
An information recording processing constitution realizing both readout difficulty and high-precision readout is provided. Superimposition recording of highly secret additional information such as a cryptographic key in a groove signal recorded on a disk, which superimposition recording realizes both readout difficulty and high-precision readout, can be performed. The groove signal to which a phase error corresponding to a bit value is set is recorded at a time of recording of the additional information, and at a time of readout of the additional information, the phase error of the groove signal in a predetermined section is subjected to an integrating process and the direction of the phase error of the groove signal within each section is determined. The recording and reproduction of the additional information for increasing readout difficulty and realizing high-precision readout is realized by such processes.
A recording medium manufacturing device comprising:
An information reproducing device comprising:
An information recording device comprising:
An information recording medium on which a groove signal used to record additional information is recorded,
An information recording medium manufacturing method performed in a recording medium manufacturing device, the information recording medium manufacturing method comprising:
An information reproducing method performed in an information reproducing device, the information reproducing method comprising:
An information recording method performed in an information recording device, the information recording method comprising:
A program for making an information reproducing process performed in an information reproducing device, the program comprising:
A program for making an information recording process performed in an information recording device, the program comprising:
Dependencies are inferred from the claim text.