Reproducing rate control apparatus for information recording disc
US4675855A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1984 |
| Grant date | Jun 23, 1987 |
| Priority date | — |
| Expiry date | Apr 3, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B27/32
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A reproducing rate control apparatus for an information recording disc in which pieces of information and absolute times for respective information pieces (representative of the reproduction time measured from the innermost circumference of the information recording disc) are recorded on the disc at a constant linear velocity, a revolution number of the disc at a command position is predicted, rotation of a disc drive motor is controlled so that the disc rotates at a predicted revolution number, and an information reader adapted to read the information recorded on the disc is moved to the command position when the revolution number controlling is effected or after the revolution number controlling has been completed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.