Information recording medium, recording apparatus, reproduction apparatus, recording method, reproduction method and defect management method
US7042825B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 2003 |
| Grant date | May 9, 2006 |
| Priority date | — |
| Expiry date | Aug 6, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2537
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Information recording media 101 and 102 usable for either a first recording density D1 or a second recording density D2 each include a user data area 106 in which user data is to be recorded, a first defect management information area 108 in which first defect management information for managing a defect area in the user data area is to be recorded, and a second defect management information area 109 in which second defect management information having an identical content to that of the first defect management information is to be recorded. The first and second defect management information areas 108 and 109 are located such that angles θ1 and θ2 made by start blocks thereof fulfill the relationships of 150°≦θ1≦210° and 150°≦θ2≦210° (θ1: in the case of the first recording density, and θ2: in the case of the second recording density).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.