Apparatus for reproducing information from optical disk on which

Details Apparatus for reproducing information from optical disk on which Apparatus for reproducing information from optical disk on which

1991-07-30

1994-08-16

Psitos, Aristotelis

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

369 48, 369124, 307261, G11B 700

Patent

active

053393031

ABSTRACT:
In this invention, in an optical disk on which information is recorded by a mark length recording method, an average value of detection signals of sync codes recorded on the optical disk beforehand is calculated, and a difference between the average value and a level "0" is determined to be a bias voltage. The bias voltage is superposed on a detection signal of the recorded information, and the signal is binarized by the level "0".

REFERENCES:
patent: 4142208 (1979-02-01), Oprandi et al.
patent: 4475183 (1984-10-01), Marchant et al.
patent: 4499570 (1985-02-01), Immink et al.
patent: 4685098 (1987-08-01), Yoshida
patent: 4724496 (1988-02-01), White
patent: 4819222 (1989-04-01), Kimura
patent: 4890275 (1989-12-01), Mori
patent: 5001698 (1991-03-01), Naito
patent: 5058089 (1991-10-01), Yoshimaru et al.
Patent Abstracts of Japan, vol. 8, No. 38 (P-255) (1475) Feb. 18, 1984 & JP-A-58 189 810 (AKAI Denki K. K.) Nov. 5, 1983.

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