Digital data reproducing apparatus

Details Digital data reproducing apparatus Digital data reproducing apparatus

1994-05-10

1996-04-09

Epps, Georgia Y.

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

369 47, 369124, 360 51, 360 65, 375229, 375290, G11B 700, H04L 2701

Patent

active

055068278

ABSTRACT:
An optical reproducing apparatus, for example, an optical magnetic disc device for reproducing data, has been recorded on a disc recording medium by applying the Viterbi decoding method, or the like, and can effectively avoid the deterioration of bit error rate even if the DC level fluctuates. When Viterbi decoding the reproducing signal by converting it into digital values, if a transition pattern in which the signal level of the reproducing signal transits across the center level is detected, the center level is corrected.

REFERENCES:
patent: 5166955 (1992-11-01), Ohta
patent: 5255128 (1993-10-01), Inoue et al.
patent: 5265125 (1993-11-01), Ohta

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