Information signal reproducing apparatus having a tracking control system
US4916554A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 1988 |
| Grant date | Apr 10, 1990 |
| Priority date | — |
| Expiry date | Aug 17, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B15/1875
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an information signal reproducing apparatus of the kind reproducing an information signal from a tape-shaped recording medium on which pilot signals of four different kinds having different frequencies are cyclically recorded in rotation along with the information signal, reference signals of four different kinds which correspond to the pilot signals of four different kinds and are generated one after another in a switch-over cycle to be used for tracking control together with these pilot signals. The reference signals are arranged to be generated one after another in a switch-over cycle which differs from the normal switch-over cycle during a specific period following change-over of the tape-shaped medium moving speed from one speed to another.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.