Method and apparatus for magnetic communication via a photograph

Details Method and apparatus for magnetic communication via a photograph Method and apparatus for magnetic communication via a photograph

1991-12-20

1994-03-15

Gellner, Michael L.

Photocopying

Contact printing

Light boxes

355 40, 360 48, 360 721, G03B 1724

Patent

active

052949494

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.

REFERENCES:
patent: 4215920 (1980-08-01), Butler
patent: 4422111 (1983-12-01), Moeller et al.
patent: 4491399 (1985-01-01), Bell
patent: 4835628 (1989-05-01), Hinz et al.
patent: 4965627 (1990-10-01), Robison
"DATAKODE Magnetic Control Surface", Eastman Kodak Company, 1983, 31 pages.

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