Writable optical drive with dynamically variable linear velocity to prevent buffer under-run
US6901039B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2000 |
| Grant date | May 31, 2005 |
| Priority date | — |
| Expiry date | Apr 14, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/28
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to methods and apparatus for dynamically varying a linear velocity of an optical drive during a write operation to an optical disc to reduce the likelihood of a buffer under-run event. By reducing a linear velocity and writing speed while the optical drive writes on the disc, an embodiment of the invention preserves the buffer and reduces a minimum data transfer rate required to sustain writing to the disc for a sustained period of time. The basic components of one embodiment of a CD-RW drive (100) in which the present invention may be implemented include a controller (110), a microcontroller (112), a nonvolatile memory (114), which stores firmware (116) executed by the microcontroller (112), a buffer (118), a spindle motor (120) and an optical pick-up (122).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.