Disk-shaped recording medium and disk recording or reproducing device
US5953297A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 22, 1998 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Oct 22, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2525
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.