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US 7,583,581 B2Granted
Information recording medium, and recording method and reproducing method thereof
AssigneeVictor Company of Japan, Ltd.
InventorYasuhiro Ueki
Life of this patent
Estimating the term…
Abstract
An information recording medium in which bottoms of a guide groove and a pit array formed on a disc substrate are allocated on a same flat plane and shaped in flat. Further, in a transition area from a pit array to a guide groove or from a guide groove to a pit array, the information recording medium is provided with an intermediate area composed of a pit array of which height changes from a height between a bottom and a side of a groove to another height between the bottom and a side of the pit array.
Claims5
An information recording medium comprising:
- a recordable area for information provided with an information track formed spirally or in coaxial circles having a groove in a first depth being prerecorded with a frequency signal and a land pre-pit address signal from an inner circumference of said information track and enabling to record ECC blocked data added with an error correction code;
- a first read only area having a pit in a second depth prerecorded with a frequency signal to be recorded with control data to be reproduced as a pit;
- and
- a second read only area having a pit in said first depth prerecorded with a frequency signal and a land pre-pit address signal to be recorded with a reproduction signal as a pit,
- wherein each tracking error signal at a time of tracking off in a boundary between said first read only area and said second read only area is defined as a ratio of maximum amplitude in both directions from a center of maximum amplitude of said tracking error signal at the time of tracking off in said recordable area.
2 more elements
Dependencies are inferred from the claim text.