Patent ID: 7848187
Filing Date: 2010-12-07
Classification: G11B

Abstract:
1. An information reproducing/recording apparatus for reproducing/recording information by emitting a laser beam from an optical pickup to a BD (Blu-ray Disc)-R capable of recording information selectively to a land track or a groove track provided for a recording layer and recording characteristic information in a predetermined area, comprising: a detector that detects a tracking error signal from a laser beam reflected by the BD-R; a controller that executes tracking servo by driving the optical pickup on the basis of the tracking error signal detected by the detector; a recording unit that records statistical information indicative of a result of a statistic taken to see which one of the BD-R that records information on the land track and the BD-R that records information on the groove track is more frequently used; an updating unit that obtains the latest statistical information recorded in a management server or an information recording medium and updates the statistical information in the recording unit with the obtained latest statistical information; and a generating unit that generates the statistical information peculiar to the information reproducing/recording apparatus and records the statistical information in the recording unit, wherein at the time of loading the BD-R, the controller temporarily determines the polarity of the tracking error signal adapted to trace of the land or the groove on the basis of any of the statistical information in the recording unit, executes the tracking servo, when the tracking servo cannot be executed normally, inverts the polarity of the tracking error signal, re-executes the tracking servo, and when the tracking servo can be executed normally, reads the characteristic information by the optical pickup, and the generating unit detects the information recording track of the BD-R on which the tracking servo can be normally executed, which is either the land track or the groove track, and records the detection result in the recording unit whenever necessary, thereby generating the peculiar statistical information.