Optical disk track jump detection

摘要

In use of an optical disk such as a Digital Versatile Disk (DVD), to detect if a track jump occurs as quickly as possible, the optical disk format includes a pre-groove track structure which provides the framework upon which data can be written to and read from the disk. The structure of the pre-groove track is utilized to detect the possible occurrence of an inadvertent track jump in a time shorter than would be required to detect the track jump using only disk addressing data. The pre-groove track structure may be modified to enhance track jump detection, such as by positional codes in data line segments of the track, or revolving coding schemes for the address data dibits.