Optical storage medium, information recording apparatus, and information reproducing apparatus

An optical storage medium comprising an information recording layer including:

• a main information region in which information is recorded as a mark row that is capable of being read out by means of light;
• and a control data region,
• wherein optical storage medium information concerning the optical storage medium is recorded with a mark row in the control data region, and
• the mark row recorded in the main information region is wobbled, where, assuming that a track pitch is Tp2, a maximum amplitude of an amount of displacement of the wobbling is not more than Tp2/30.

An optical storage medium comprising a plurality of information recording layers, each including:

• a main information region in which information is recorded as a mark row that is capable of being read out by means of light;
• and a control data region in which optical storage medium information concerning the optical storage medium is recorded,
• wherein information is recorded as a concave or convex mark row in a main information region of at least one information recording layer of the plurality of information recording layers, and
• optical storage medium information concerning all of the plurality of information recording layers is recorded in a control data region of at least one information recording layer of the plurality of information recording layers.

An information reproducing apparatus, comprising:

• an optical pickup that irradiates an optical storage medium with light so as to read out main data information and optical storage medium information recorded in the optical storage medium, where the optical storage medium includes main information region in which the main data information is encrypted and recorded and control data region in which optical storage medium information is recorded with a mark row or by wobbling a groove that is concave or convex relative to a side on which the light is incident, the optical storage medium information containing key information for decoding the encryption of the main data information or identification information indicating that the optical storage medium is manufactured properly or information therein may be reproduced;
• a key information detection unit that detects the key information based on a signal read out by the optical pickup;
• and
• a demodulation unit that decodes the encryption of the main data information based on the key information detected by the key information detection unit.

An information recording apparatus that records main information in an optical storage medium, where the recording is conducted in frames provided synchronous codes by means of optically readable recording marks, comprising:

• a modulation unit that modulates the main information and inserts a synchronous code at predetermined intervals;
• a displacement control signal generation unit that generates a displacement control signal with reference to a timing of the insertion of the synchronous code;
• and
• a sub-information recording unit that records sub-information by slightly displacing the recording marks to an outer rim side or to an inner rim side in accordance with the displacement control signal.

An information reproducing apparatus for reproducing main information from recording marks formed on an optical disc, the reproduction is conducted in frames provided with synchronous codes, comprising:

• a radial phase difference detection unit that detects displacement of the recording marks in a radial direction;
• a clock extraction unit that extracts, from a reproduction signal of the recording marks, a standard clock signal that is in synchronization with the reproduction signal;
• a reproduction signal processing unit that detects the synchronous codes from the reproduction signal and modulates the reproduction signal;
• a correlation sequence generation unit that generates a correlation sequence with reference to a timing when the synchronous codes are detected;
• and
• a sub-information detection unit that detects sub-information from a radial phase difference signal generated by the radial phase difference detection unit and the correlation sequence.