TRACK JUMP UNIT.

摘要

The invention relates to a track jump unit and a method for performing jumps of a light beam (221) of an optical pickup device (201) from a first track to a second track of a disc. The radial error signal is detected, and an extended radial error signal (EXE) is derived from the radial error signal, this extended radial error signal being a monotonous signal comprising portions having track identifiers associated therewith. Based on the value of the current track identifier (ID) and the extended radial error signal, a displacing signal is generated in order to displace the light beam. To perform a jump, the current identifier is modified, so as to displace the light beam to the desired track.