Recording/playback device and method thereof, and disc
US5828639A · kind A · utility
27Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1997 |
| Grant date | Oct 27, 1998 |
| Priority date | — |
| Expiry date | Feb 12, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/65
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data recording region of a disc is divided into a plurality of zones, the plurality of zones comprising a plurality of bands, and with a range from an innermost radius to an outermost radius being divided into four bands by four radii, with the rotational velocity of the disc at each of the bands being fixed in such a manner as to increase disc capacity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.