Dynamic magnetic information storage or retrieval – Recording on or reproducing from an element of diverse utility – Motion picture film
Patent
1996-10-07
1998-06-09
Edun, Muhammad N.
Dynamic magnetic information storage or retrieval
Recording on or reproducing from an element of diverse utility
Motion picture film
360 39, 360 48, 360 51, G03B 3100, G11B 509
Patent
active
057644276
ABSTRACT:
A magnetic recording method for recording binary code data on magnetic recording tracks formed with a constant length on photo film. Each bit of the binary code data is recorded as a bit segment constituted of a first kind magnetic zone and a second kind magnetic zone magnetized in reverse to the first kind magnetic zone. The first kind magnetic zone has a shorter length of less than 50% of the bit segment or a longer length of more than 50% of the bit segment depending upon which binary value is assigned to the bit segment. The length of each bit segment is determined for each magnetic recording track based on a total number of bits of binary code data to be recorded on that magnetic recording track, such that as the total bit number decreases, the number of bits to be recorded per unit length decreases. Also, the percentage in length of the first kind magnetic zone is adjusted to be closer to 50% of the bit segment for both binary values, as the total bit number increases.
REFERENCES:
patent: 5294949 (1994-03-01), Robinson et al.
Edun Muhammad N.
Fuji Photo Optical Co., Ltd.
Fuji Photo Film Co. , Ltd.
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