Method and device for detecting track deflection of diskette of optical drive

Abstract

The invention discloses a method and device for detecting track deviation of disc for a CD-ROM, using amplitude potential of central error signal or frequency of semi-track signal in unit time as a basis, able to more easily detect whether the disc deviates from the track and having no noise trouble in trigger source as compared with the known method using track following error signal, thus avoiding misjudging whether the disc deviates from track.

Description

technical field [0001] The present invention relates to a method and device for detecting disc off-track in an optical drive, in particular to a method and device for detecting disc off-track in an optical drive using the amplitude potential of a center error signal (Center Error) or the frequency of a half-track signal per unit time as an optical drive. basis for the device. Background technique [0002] Generally speaking, because the carrier carrying the optical disc in the optical drive or the track of the optical disc itself is not a true circle, the optical disc is often unable to be fixed on a center of a circle. Also therefore, when the read / write head of the optical drive reads or writes the optical disc, the situation (run out) often occurs easily, and the read / write head of the optical drive cannot read or write to the correct track on the optical disc. [0003] When the optical drive detects that the optical disc it carries is off-track, the corresponding contin...

AI Technical Summary

Problems solved by technology

[0008] Based on the known use of the tracking error signal returned by the read / write head of the optical drive as the detection signal of whether the optical disc carried by the optical drive is off-track or not, the tracking error signal is displayed when the optical disc is off-track or not. The difference in the amplitude potentials is not large, which makes the optical drive unable to read or write the optical disc.

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