Data reproduction apparatus

Details Data reproduction apparatus Data reproduction apparatus

1997-02-13

1999-02-16

Edun, Muhammad N.

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

369 58, 369 47, G11B 700

Patent

active

058727540

ABSTRACT:
A data reproduction apparatus assuring compatibility of optical disks capable of reproducing both pit-position recorded data and edge-position recorded data in optical disks by digital operation by using digital values obtained by sampling reproduction signals. A reproduction signal obtained by an optical head is converted into a digital value by a first A/D converter, and on the basis of the converted digital value, pit-position recorded data is recorded by a pit-position detector. Moreover, the reproduction signal obtained by the optical head is converted into digital values by first and second A/D converters, and on the basis of the converted digital values, front edge and rear edge maximum likelihood decoded data of edge-position recorded data are detected by first and second maximum likelihood detectors, and both maximum likelihood decoded data are synthesized by a synthesizer.

REFERENCES:
patent: 5559777 (1996-09-01), Maeda et al.

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