Optical disc with information recording tracks

摘要

The optical disk has information recording tracks in the form of land (2) and groove (1) tracks. The disk is divided into a number of annular zones. Each revolution of the information recording track belongs to one of the zones depending on the position in the radial direction of the track. Each revolution of the information recording track is divided into a number of sectors of a unit length of information recording in the direction of the scanning. The disk has a header (4) portion at the head of each sector. The header portion includes a recognition pattern which is formed of a sequence of pits having a pattern which is not used as a pattern for data or address in the information recording part, in the modulation method used. The disk is of a land/groove single-spiral configuration in which land tracks and groove tracks are connected at connecting points, occurring every revolution.