Disk drive apparatus and disk storage medium for high density re

Details Disk drive apparatus and disk storage medium for high density re Disk drive apparatus and disk storage medium for high density re

1997-02-04

1998-05-05

Hindi, Nabil

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

369 48, G11B 700

Patent

active

057485925

ABSTRACT:
A disk drive apparatus is provided that can reproduce data at low bit error rate even if a crosstalk is large. This apparatus comprises means for writing three or more different states of record marks in a read track and adjacent tracks thereof on a disk storage medium, means for detecting read levels of the record marks in the read track, means for calculating every possible read level regarding every possible combination of the record marks in the read track and adjacent tracks thereof according to the detected read levels, and means for performing most-liklihood decoding of written data in accordance with the possible read levels as reference levels.

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patent: 5623474 (1997-04-01), Oshio et al.

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