Patent ID: 7362671
Filing Date: 2008-04-22
Classification: G11B

Abstract:
1. An optical disc recorder and/or player, comprising: a rotation drive unit operable to rotate an optical disc having defined therein a first recording area in which a frame sync signal and data are recorded and a second recording area having a plurality of pits arranged in a pit pattern and having identification data recorded thereon; a head unit operable to scan the optical disc by projecting a laser beam to the optical disc; and a controller operable to control the rotation drive unit in a first rotation control mode when the head unit scans the first recording area and to control the rotation drive unit in a second rotation control mode when the head unit scans the second recording area, said controller being operable to detect, for the second recording area, an interval of inversion from maximum and minimum pulse widths of a data signal having a predetermined period between the pits in the pit pattern to form a frame sync signal, and to control the rotation drive unit such that the interval of inversion of the frame sync signal coincides with a reference length of time, wherein the first and second recording areas are recording areas distinct from each other.