Optical disc and its information recording method and apparatus

Abstract

Recording timing of a Data segment is set so as to avoid locating a wobble modulated portion as preformat information which indicates information on Physical segments of a recording type optical disc, and a recording start head position of the Data segment to be recorded in a track, in the same area of the track.

1 . An optical disc in which a recording track is divided into a plurality of Physical segments ( . . . , n, n+1, . . . ) and the recording track meanders, and when Data segments ( . . . , m, m+1, . . . ) recorded on the recording track are reproduced, a wobble signal is obtained which is modulated in accordance with the meandering shape of the recording track, wherein:
 a modulated portion (IPW) and an unmodulated portion (NPW) of the wobble signal form a synchronous field (SYNC) for the Physical segments; and   a head position of the Data segment (M+1) recorded on the recording track is located in the unmodulated portion (NPW).   
   
   
       2 .- 8 . (canceled)