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US 7,924,695 B2Granted
Information recording medium, recording apparatus, reproduction apparatus, recording method, and reproduction method
AssigneePanasonic Corporation
InventorsMamoru Shoji, Takashi Ishida, Motoshi Ito, Hiroshi Ueda, Yoshikazu Yamamoto, Atsushi Nakamura
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Abstract
An information recording medium is provided, which comprises a plurality of recording layers and a first disc information area for storing parameters relating to access to the plurality of recording layers and formats relating to the plurality of recording layers. The first disc information area is provided in a first recording layer which is one of the plurality of recording layers.
Claims5
An information medium comprising:
- a plurality of layers, each of the plurality of layers includes:
- a first area including a disc information area having disc information stored thereon and a second area including a data area;
- a first track pitch in the first area that is different from a second track pitch in the second area;
- and
- a transition area of track pitches provided between a first track in the first area and a second track in the second area,
- wherein each first area of the plurality of layers is provided at an about the same radial position,
- each second area of the plurality of layers is provided at an about the same radial position, and
- transition of track pitches in the transition area is completed within 100 tracks,
- wherein the first track pitch is wider than the second track pitch, and the first area is a reproduction-only area.
6 more elements
Dependencies are inferred from the claim text.