Track position correction for a helical scan magnetic playback
US4719525A · kind A · utility
4Cited by
6References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1986 |
| Grant date | Jan 12, 1988 |
| Priority date | — |
| Expiry date | Apr 17, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/588
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A control circuit for a helical scan playback, in which a rotary head is moved transversely by a varying amount. The transverse movement can be either a multi-valued tracking position error correction signal or a saw-tooth waveform, effective during a location data strip, for compensating for the fast movement of the tape during a scan operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.