Disk reproducing apparatus capable of increasing speed of access to disks recorded at constant linear velocity
US5528574A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1994 |
| Grant date | Jun 18, 1996 |
| Priority date | — |
| Expiry date | Dec 16, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/005
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical disk reproducing apparatus for reproducing at a high access-speed an optical disk on which data has been recorded at a constant linear velocity (CLV) includes a control circuit for controlling reading of the disk recorded at a CLV to be rotated at a constant angular velocity (CAV), and a processor for changing the frequency of a reference clock to determine the processing timing of the reproduced digital signal in accordance with a transmission speed of the digital information signal picked up from the disk. A motor for driving the disk can be rotated at a constant revolution rate upon access to the disk, and thus it is possible to remove one of the factors for determining the access time in the conventional CLV type reproduction system, or the time for controlling the motor to rotate for a constant linear velocity in accordance with the position of the optical pickup.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.