Magnetic recording and reproducing method and apparatus with ver

Details Magnetic recording and reproducing method and apparatus with ver Magnetic recording and reproducing method and apparatus with ver

1992-01-30

1994-09-13

Hajec, Donald

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of equalizing

427127, 427250, 428611, 428928, G11B 5035, B05D 512, C23C 1600, H01F 100

Patent

active

053474082

ABSTRACT:
A digital signal to be recorded is converted into a digital signal having a suppressed low-frequency spectrum and having a shortest recording wavelength greater than half an original shortest recording wavelength, and the converted digital signal is recorded on a magnetic recording medium in which a plurality of metal evaporated films having different crystal-growth directions are laminated. The digital signal is reproduced from the magnetic recording medium in which the plurality of metal evaporated films having different crystal-growth directions are laminated. Waveform equalization is performed on the reproduced digital signal, and integration detection is performed on the waveform-equalized digital signal, thereby restoring an original digital signal.

REFERENCES:
patent: 4234898 (1980-11-01), Nakagawa et al.
patent: 4371590 (1983-02-01), Izumi et al.
patent: 4520076 (1985-05-01), Saito et al.
patent: 5069967 (1991-12-01), Yokoyama et al.

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