Apparatus for detecting dropout, an error signal extracting unit, and unit for identifying type of dropout in an optical pickup
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 11, 2003
Grant Date -
Oct 4, 2001
app pub date -
Feb 27, 2001
filing date -
Mar 6, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A servo control apparatus of an optical pickup is provided for reading recorded information from a recording medium and generates a read signal. The apparatus includes an error signal extracting part for extracting an error signal which indicates a deviation amount of a reading position from a target reading position of the optical pickup; a drive part for driving the optical pickup to change the reading position; an equalizer for equalizing the error signal and supplying a drive signal which indicates a driving amount of the drive part; a detecting part for detecting a dropout portion in the read signal; an identifying part for identifying a form of the dropout portion detected in the detecting part; and a controller. The controller performs control to change a gain of the equalizer in accordance with the identified form of the dropout portion.
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