Optical disk and apparatus for reproducing signal without crosst

Details Optical disk and apparatus for reproducing signal without crosst Optical disk and apparatus for reproducing signal without crosst

1993-07-13

1996-02-27

Psitos, Aristotelis

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369111, 369124, 3692753, G11B 2736

Patent

active

054954606

ABSTRACT:
An optical disc includes a signal recording track spirally formed on the surface of the optical disc, information pits formed on the signal recording track, and a plurality of non-signal regions periodically formed on the signal recording track, wherein no information pit is formed on the non-signal region. An apparatus for reproducing signal recorded on the optical disc includes device for irradiating at least one light beam onto the surface of the optical disc, device for detecting light beams reflected by the surface of the optical disc and producing electrical signals, device for converting frequency characteristics of the electric signals in accordance with individually-alterable converting coefficients, device for adding the electrical signals to output a sum signal as a reproduction signal, device for detecting the non-signal regions, and device for setting the converting coefficients of the frequency characteristics converting device in accordance with the reproduction signal when the non-signal regions are detected.

REFERENCES:
patent: 4663751 (1987-05-01), Kaku et al.
patent: 4764914 (1988-08-01), Estes et al.
patent: 5280466 (1994-11-01), Tomita

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