Patent ID: 6249508
Filing Date: 2001-06-19
Classification: G11B

Abstract:
An optical disc having a land and a groove, in which information is recorded and/or reproduced on or from a track on said land and said groove, comprising:a data section having groove portions formed between radially successive land portions; andan address section including a non-grooved area said non-grooved area having address information data and non-address information data formed therein, said address information data being previously formed at a first pre-set period on said track, said non-address information data being previously formed at a second preset period on said track;said address information data being arranged in a radial direction with address information data portions on adjacent extensions between land and groove portions of said data section relatively offset in a track direction, such that said address information data portions do not overlap in a radial direction;said non-address information data being arranged in a radial direction with non-address information data portions on adjacent extensions between land and groove portions of said data section substantially overlapping in a radial direction,wherein the land is switched to the groove or vice versa an odd number of times, and at least three times, per turn on the track.