Method for detecting an error in loading a recording disc
US4679181A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 8, 1986 |
| Grant date | Jul 7, 1987 |
| Priority date | — |
| Expiry date | Sep 8, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B27/105
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disc drive control system for controlling the drive of a disc carrying a binary digital signal incluring a clock information of a predetermined frequency wherein the digital signal includes an information signal portion of an information to be recorded and synchronizing signal portions which includes successive maximum periods of inversion. The system includes a detection means for detecting the period of the successive maximum periods of inversion of the synchronizing signal and producing a detection signal, and a control means for producing a control signal of disc drive means which control signal is produced in accordance with the detection signal prior to a period in which the control signal is produced in accordance with a reproduced clock signal, whereby eliminating a problem that the driving speed of the disc may be controlled in accordance with an erroneously reproduced clock signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.