| 摘要 |
The present invention discloses a method and apparatus for detecting a run-out disc in an optical disk drive, wherein the amplitude level of a center error signal or a frequency of half-track signal per unit time is used as the basis for the detection. Unlike the prior art of using the tracking error signal as basis for the detection, it is easier for the invention to detect the run-out, and the half-track signal is not troubled by the noises on the trigger source which is suffered by tracking error signal, and thus preventing a misjudgment of run-out.
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