Method and apparatus for magnetic communication via a photographic filmstrip using trappable data sentinels
US5294949A · kind A · utility
13Cited by
5References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1991 |
| Grant date | Mar 15, 1994 |
| Priority date | — |
| Expiry date | Dec 20, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2217/246
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Overhead and data loss are reduced when transferring data via magnetic recording in a magnetic layer of an elongate photographic filmstrip, by providing a trappable data sentinel at the beginning of a data field. The data sentinel comprises a pair of reserved characters which establish a data character boundary for data in the field and also identify the nature of this data. The data sentinel is trapped by an identity comparator and also read by a host computer or processor. Data fields employing the data sentinel format can be embedded within a start sentinel/end sentinel track architecture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.