Optical recording medium having read-only storage area and writeable storage area and recording/reproducing apparatus and method therefor
US7151729B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 2000 |
| Grant date | Dec 19, 2006 |
| Priority date | — |
| Expiry date | Apr 8, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2575
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical recording medium having a read-only storage area and a writable storage area and a recording/reproducing apparatus and method therefor. The optical recording medium is a hybrid disc having both the read-only storage area, which is suitable for mass production of information having the same contents, and the writable storage area on which data can be recorded, updated or added at a user's option. The read-only storage area has a structure that is completely compatible with a digital versatile disc read only memory (DVD-ROM) specification, and the writable storage area is compatible with the recording/reproducing characteristics of a writable DVD specification so that an existing reproducing-only apparatus can read information from the read-only storage area, and data can be recorded in the writable storage area using an apparatus obtained by minimally changing an existing recording/reproducing apparatus while maintaining the physical recording characteristics of the existing recording/reproducing apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.