Automatic track following feature for helical video recorder
US4426665A · kind A · utility
12Cited by
11References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1982 |
| Grant date | Jan 17, 1984 |
| Priority date | — |
| Expiry date | Dec 1, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/588
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An automatic track following feature for use with a helical video recorder is disclosed which enables reproduction of video fields at normal speeds, fast and slow forward and reverse speeds, and at stop motion, wherein a mechanism for moving a playback head transverse to the helical tracks on a magnetic tape is provided in order to enable the head to remain centered on the track regardless of tape speeds and directions of movement. A head position control signal is generated for driving the head positioning mechanism based on a comparison of a signal based on the instantaneous tape speed with a reference speed indicating signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.