Magnetic recording method and device for magnetic recording bina

Details Magnetic recording method and device for magnetic recording bina Magnetic recording method and device for magnetic recording bina

1996-05-24

1998-03-17

Metjahic, Safet

Photography

With data recording

Magnetically on film or film cassette

G03B 1724

Patent

active

057297789

ABSTRACT:
A magnetic recording method or device for recording binary code data on a magnetic recording track of photo film while moving the photo film in a direction on a magnetic head. Each bit of the binary code data is recorded as a bit segment of a constant length constituted of a forward magnetic zone magnetized in a forward direction identical to a film advance direction, and a reversed magnetic zone magnetized in reverse to the forward direction and disposed behind the forward magnetic zone. The forward magnetic zone has one of two different lengths within each bit segment depending upon binary value of the bit segment. An additional reversed magnetic zone is recorded immediately before a start bit segment of the binary code data, for a time period which is determined for recording the forward magnetic zone of the start bit segment. An additional forward magnetic zone is recorded immediately after an end bit segment of the binary code data, for a time period which is used for recording the reversed magnetic zone of the end bit segment. As a result of this, the first and last bits of data are more reliably generated.

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