Method for tracking an optical disc of a shallow/deep groove type and apparatus adopting the same

摘要

A tracking method discriminates whether an optical disc loaded in a recording and/or reproduction system is a shallow groove type optical disc or a deep groove type optical disc, and corrects the phase of the tracking error signal detected from the optical disc according to the discrimination result, to then perform a tracking servo control using the corrected result. A tracking apparatus includes an optical signal detector detecting a tracking error signal from an optical disc loaded in a recording and/or reproduction system. A groove type discriminator analyzes the tracking error signal output from the optical signal detector to discriminate a groove type of the loaded optical disc and generates a corresponding control signal. A phase corrector corrects the phase of the tracking error signal output from the optical signal detector according to the control signal applied from the groove type discriminator. A tracking servo portion servo-controls a beam spot to perform an accurate tracking over a center line of a target track of the loaded optical disc, using the phase-corrected tracking error signal. The tracking method and apparatus enables accurate tracking-servo-controlling of both the shallow groove type optical disc and the deep groove type optical disc.