Patent ID: 6606289
Filing Date: 2003-08-12
Classification: G11B

Abstract:
A recording and/or reproducing apparatus for recording and/or reproducing information on/from an optical recording medium having a wobbled groove formed in the optical recording medium, the wobbled groove having a sinusoidal shape, the sinusoidal shape defining a plurality of wobbling periods; a land region of the medium between neighboring turns of the wobbled groove; and a plurality of first pits formed in the land region adjacent to the groove, each first pit on one side of a turn of the wobbled groove being formed in a wobbling period at a substantially equivalent phase position with respect to the wobbled groove, only a single first pit being present in a wobbling period on said one side,the apparatus comprising: a detecting circuit that detects a wobbled signal from the groove and pit signals from the first pits; and a controller that controls rotation of the optical recording medium by the wobbled signal detected from the groove, and detects a position on the optical recording medium of a recording signal by the pit signals detected from the first pits.