Apparatus for inspecting disc recording medium

Details Apparatus for inspecting disc recording medium Apparatus for inspecting disc recording medium

1996-08-14

1998-05-05

Edun, Muhammad N.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 47, 369 59, G11B 700

Patent

active

057485909

ABSTRACT:
An apparatus for inspecting a disc recording medium detects whether the high-frequency signals have been missed or not by the high-frequency-signal drop-out detecting circuit (26), in addition to the verification of the reproduced data and the detection of servo error of large instant change. Therefore, defect sectors of which sure detection have been heretofore difficult is detected with high efficiency, so as to prevent errors of the reproduced data.

REFERENCES:
patent: 5442614 (1995-08-01), Tanegai

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