Sony Corporation

Kazushige Morita

Masahiro Takahashi

Yosuke Suzuki

A DVD recorder is provided in which access control is effected by a driver layer (), a UDF file system layer (,) that reads and writes data from and to a DVD-RW with reference to a file system, and a data base layer () that accesses the UDF file system layer () with reference to content management information for management of contents stored in the DVD-RW. The data base layer () reads TMP_VMGI which is intermediate-state management information for the DVD-RW, and provisionally registers a file system into the UDF file system layer () with reference to information included in the TMP_VMGI. Thus, a file system is provisionally formed even if the DVD-RW loaded in the DVD recorder is in the intermediate state having no file system recorded therein.

Recording/playback device, and recording medium access method

To determine whether a record medium loaded on a drive has character information in a management area of the record medium corresponding to data received from the drive and to obtain the character information when the record medium has the character information as the determined result. A system includes an optical disc drive and a host computer connected through an interface , wherein the drive has a servo and signal processing portion , a system controller , and a CD-ROM signal processing portion . The servo and signal processing portion reproduces data from a disc . The system controller controls the entire operation of the drive. Return data is sent from the drive to the host computer corresponding to a read table of contents (TOC) command received from the host computer . A code that represents the data length is contained in a header of the return data. With the code, it is determined whether or not the disc is a CD-TEXT disc. When the, disc is a CD-TEXT disc as the determined result, the read TOC command is re-issued. Thus, CD-TEXT data is obtained.

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Tokyo, Japan

Kazushige Morita