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US 8,159,926 B2Granted
Information recording medium, and recording method and reproducing method thereof
AssigneeJVC KENWOOD Corporation
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.
Claims2
A recording method for recording information on an information recording medium comprising:
- (a) a lead-in area, said lead-in area including
- (1) a first track area having a first physical feature that is formed with emboss,
- (2) a first groove area having a second physical feature different from said first physical feature that is allocated in an inner circumferential side of said first track area,
- (3) a first connection area for continuously connecting said first track area to said first groove area,
- (4) a second groove area having a third physical feature different from said first physical feature that is allocated in an outer circumferential side of said first track area, and
- (5) a second connection area for continuously connecting said first track area to said second groove area;
- and
- (b) a data area including a third groove area having a fourth physical feature different from said first physical feature and a wobbling frequency signal that is allocated in an outer circumferential side of said lead-in area,
- the recording method comprising the steps of:
- producing a velocity signal for driving said information recording medium to rotate based upon said wobbling frequency signal and rotating said information recording medium in a constant linear velocity;
- and
- producing a clock signal for information to be recorded on said information recording medium based upon said wobbling frequency signal and recording the information in said data area on said information recording medium.
9 more elements
Dependencies are inferred from the claim text.