Pick-up point dislocation detecting device in recording a disc player
US4493068A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 14, 1982 |
| Grant date | Jan 8, 1985 |
| Priority date | — |
| Expiry date | Jul 14, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/106
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pick-up point dislocation detecting device for detecting dislocation of a pick-up point of pick-up means in a disc player. The pick-up point is dislocated from a recorded region of a recording disc being played back on the disc player. The dislocation detecting device compares the signal level of an electric signal obtained from the pick-up means with a reference level. The reference signal corresponds to the signal level of the electric signal when the pick-up point is located within an intervening region between two neighboring tracks on the recording disc. The dislocation detecting device produces a dislocation detection signal when the signal level of the obtained electric signal falls below the reference level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.