System for correlating head scan tracking and tape timer transitions
US5103355A · kind A · utility
14Cited by
2References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 11, 1989 |
| Grant date | Apr 7, 1992 |
| Priority date | — |
| Expiry date | Apr 11, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A scan tracking centering algorithm is not left at a nominal value, but is modified based on a tape timer's position into the field. That is, the scan tracking centering is adjusted forward (i.e., down) if the tape timer indicates the tape position is early in the field, and is adjusted back (i.e., up) if the indicated tape position is late in the field. Thus, the head deflection control decision which determines if the jumps, or doesn't jump, is made dependent upon tape position in the field, as well as on head elevation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.