Disk-shaped recording medium with a groove section having a wobbling side wall
First Claim
1. A disk-shaped recording medium, comprising:
- a plurality of readable and writable block areas provided on the medium;
a groove section at least one of whose side-walls wobble(s) or deviate(s) in radial directions of the medium for prerecording a first address information including first address value allocated to each of the block areas;
a plurality of sector areas, provided in the block areas, of lengths that are specified so as to form a constant ratio to lengths of the block areas;
a second address information area, provided in each of the sector areas, for recording second address information including a second address value for distinguishing each of the sector areas from the rest of the sector areas; and
a data area, provided in each of the sector areas for recording data.
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Accused Products
Abstract
A disk-shaped recording medium has a groove only one of whose side-walls wobbles or deviates in radial directions of the disk in order to prerecord first address information. In addition, the disk medium has block areas in the groove and in the land where the first address information is given and sector areas provided with second address information for every piece of recording data which is divided into predetermined lengths, wherein `m` pieces of sector areas are allocated for `n` pieces of block areas and recorded in the groove and the land (both n and m are integral numbers, and n is smaller than m). The second address information based on the first address information enables the sectors to be set at any length, and improves reliability of the address information. Moreover, the second address information realizes high density recording using both the land and the groove.
36 Citations
14 Claims
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1. A disk-shaped recording medium, comprising:
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a plurality of readable and writable block areas provided on the medium; a groove section at least one of whose side-walls wobble(s) or deviate(s) in radial directions of the medium for prerecording a first address information including first address value allocated to each of the block areas; a plurality of sector areas, provided in the block areas, of lengths that are specified so as to form a constant ratio to lengths of the block areas; a second address information area, provided in each of the sector areas, for recording second address information including a second address value for distinguishing each of the sector areas from the rest of the sector areas; and a data area, provided in each of the sector areas for recording data. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A disk-shaped recording medium comprising:
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a plurality of readable and writable block areas provided on the medium; a groove section at least one of whose side-walls wobble(s) or deviate(s) in radial directions of the medium for prerecording a first address information including first address value allocated to each of the block areas; a plurality of sector areas, provided in the block areas, of sizes smaller than each of the block areas; a second address information area, provided in each of the sector areas, for recording second address information including a second address value for distinguishing each of the sector areas from the rest of the sector areas; a data area, provided in each of the sector areas for recording data; and wherein the block areas are provided in the groove section and in a land section between adjacent parts of the groove section, and the first address information including the first address value allocated to each of the block areas in the groove section and each of the block areas in the land section which corresponds to that part of the groove section is prerecorded in a configuration in which only one of the side-walls of the groove section wobbles or deviates in radial directions of the medium. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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Specification