Sony Corporation

Yoshihiro Horibata

Norichika Mine

Satoshi Kumai

A recording apparatus that performs recording of data on a disc-shaped recording medium including a recording area, which is capable of recording user data therein, and a replacement area, which is replaced by a defect area included in the recording area, includes a setting section configured to replace a portion of the recording area by the replacement area, and set the portion of the recording area as an area for adjustment, and an adjustment section configured to perform adjustment by using the area for adjustment.

Recording apparatus and recording method

An optical disc drive apparatus includes: a laser beam source; a collector device disposed as facing a disc that can record a signal, which collects a laser beam emitted from the laser beam source onto the disc; a record processing module which records the signal on the disc through the collector device while modulating laser power of the laser beam source; a reflecting light level detecting module which receives the reflecting light when the signal is recorded and detects a level of the reflecting light; a laser power control module which controls the laser power when the signal is recorded based on the detected level of the reflecting light; a tilt control module which controls a tilt angle between the disc and the collector device based on the detected level of the reflecting light; and a switching module which switches between control of the laser power and the tilt angle.

Optical disc drive apparatus and signal recording method

In a storage medium such as a DVD+R or DVD+RW disc having a plurality of recording layers, the maximum address (i.e., the maximum physical sector number of a layer) of a user-data-recordable region (data zone) in each recording layer is recorded as physical format information in a wobbling groove. Based on the information, a recording/reproducing apparatus checks the maximum address of a data zone in each recording layer.

Storage medium, recording/reproducing apparatus, and recording/reproducing method

This invention relates to a data recording method or the like preferably being applicable to a case where it records data on an optical disc such as DVD&plus;RW disc. When writing the data on block area A, if no normal write clock occurs correctly, it stops writing the data and performs replacement procedures on the area A. It then writes predetermined data on the area A using reference clock. It also records the data on next block area A&plus;1 across the area A, thereby preventing the area A from generating blank portion therein on its rear side based on nonuniform rotation of the optical disc, etc. It records the data on the area A&plus;1 using normal write clock. It then performs the replacement procedure on the area A&plus;1. Thereby, it prevents the disadvantage such as a tracking servo failure in the areas A and A&plus;1.

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Kanagawa, Japan

Yoshihiro Horibata