Dynamic magnetic information storage or retrieval – General processing of a digital signal – In specific code or form
Patent
1989-12-12
1992-09-15
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
General processing of a digital signal
In specific code or form
G11B 509
Patent
active
051483335
ABSTRACT:
A method for recording and/or reproducing a signal in which three regions of a magnetization region in which magnetization is effected in a certain direction, a magnetization direction in which magnetization is effected in the opposite direction to that of the former region and a random magnetization region in which magnetization is effected randomly are arranged on a recording medium and digital data are recorded in correspondence with the three regions. Upon reproduction, a calculation is effected by using a reproduced signal and an isolated waveform information derived from the recording medium, thereby obtaining anticipated data whose most likelihood value is high, and this anticipated data is employed as detected data. Accordingly, a large reproduced output can be obtained in accordance with the change of magnetization, and freedom of the code itself can be increased, thereby improving the recording linear density as compared with the prior art.
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Canney Vincent P.
Kananen Ronald P.
Sony Corp.
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