Information recording medium, and recording method and reproducing method thereof
View Patent ↗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.
1. 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 recordable area and said first read only area and another boundary between said first record 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. A reproducing method for reproducing an information recording medium in accordance with claim 1 , said reproducing method comprising the steps of:
reproducing control data from said first read only area; and then
reproducing ECC blocked data added with an error correction code from said recordable area.
3. A reproducing apparatus for reproducing an information recording medium in accordance with claim 1 , said reproducing apparatus comprising:
a means for reproducing control data from said first read only area; and
a means for reproducing ECC blocked data added with an error collection code from said recordable area after said control data is reproduced.
4. A recording method for recording information on an information recording medium in accordance with claim 1 , said recording method comprising the steps of:
reproducing control data from said first read only area; and
recording ECC blocked data added with an error correction code in said recordable area.
5. A recording apparatus for recording information on an information recording medium in accordance with claim 1 , said recording apparatus comprising:
a means for reproducing control data from said first read only area; and
a means for recording ECC blocked data added with an error correction code in said recordable area.