Rail guided control method and optic disc machine

Abstract

This invention relates to a guided control method for controlling a disk machine to read a disk sheet with multiple orbits including multiple concave orbits and multiple convex orbits, which are serial alternately, the method includes the following steps: detecting the disk machine to read or write an orbit position in the sheet then forecasting at least a distance counting value according to the orbit position and generating an alternate signal to copy / read the concave orbits or the convex orbits with different copy / read powers, in which, the orbit position is at a current orbit and the distance counting value shows the distance of the current start end to that of a successive orbit.

Description

technical field [0001] The invention relates to a control method of an optical disc drive, in particular to a tracking control method of the optical disc drive. Background technique [0002] In order to allow optical discs to store more data, the new generation of optical disc specifications not only uses lasers with shorter wavelengths, but also changes the track structure of optical discs. [0003] Such as figure 1 As shown, it is a schematic diagram of the track structure of an optical disc of the known DVD-RAM standard, wherein the track of the optical disc is formed by alternately connecting groove tracks (Groove Tracks) and land tracks (Land Tracks). Such as figure 1 As shown, the innermost circle of the disc is a convex track, the second circle is a concave track, and the third circle is a convex track, which are alternately connected to form a DVD-RAM standard optical disc track structure, where the concave and convex rails are alternately connected It is called t...

AI Technical Summary

Problems solved by technology

[0007] However, the known technology must constantly detect the tracking error signal or read the physical label field, so when the quality of the optical disc is not good or the optical head is not well controlled when reading the optical disc, it will cause the tracking error signal Or the physical mark is not easy to read or identify, so it is also impossible to correctly judge the alternate point of concave track and convex track to switch different programming / reading power

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