System for reproducing high-density magnetic record data with vi

Details System for reproducing high-density magnetic record data with vi System for reproducing high-density magnetic record data with vi

1995-10-27

1998-12-01

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of equalizing

360 40, 360 46, 360 53, 375262, 375263, 375290, 375264, G11B 5035, G11B 509

Patent

active

058447415

ABSTRACT:
A system for reproducing data recorded on a magnetic recording medium at high density is provided as a simple configuration. Quadripartite reproduction data is output from a Viterbi detection circuit to an adder, which then subtracts the quadripartite reproduction data from a signal before PR4-ML method data determination. An adder is used to perform a (1+D) process for the result. An error signal pattern detection circuit performs maximum likelihood estimation for an PR4-ML method detection error. Further, when a detected determination error matches an actual reproduction data string, a data correction circuit corrects the reproduction data string.

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US application #08/524,040, filed Sep. 6, 1995.
"Vitebri Detection of Class IV Partial Response on a Magnetic Recording Channel", R. Wood et al, IEEE Transactions on Communications, vol. COM-34, No. 5, May 1986.
"Viterbi Detector Including PRML and EPRML", T. Sugawara, et al, IEEE Transactions on Magnetics, vol. 29, No. 6, Nov. 1993.
"Turbo-PRML: A Compromise PRML Detector", IEEE Transactions on Magnetics, vol. 29, No. 6, May 1993.

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