Sony Corporation

Panasonic Corporation

Kazuyuki Honda

Kenji Urushihara

Tomomi Nishikata

Yoshikazu Ohmura

Tetsuya Okubo

A disk device configured in such a manner that, in addition to tilt adjustment, the adjustment of the distance between a disk and an optical pickup can be easily performed. The disk device is provided with a stepping motor () for moving the optical pickup (), a base chassis () to which a spindle motor () for rotating a turntable on which a disk () is affixed is mounted so as to be adjustable in position, a guide shaft () provided to the base chassis () so as to extend in the radial direction of the disk and guiding the movement of the optical pickup () by being in contact with a portion of the optical pickup (), a sub guide shaft () provided to the base chassis () and guiding the movement of the optical pickup (), a tilt adjusting section () for adjusting the relative distance between the sub guide shaft () and the base chassis (), and a turntable adjusting section () for adjusting the radial angle, the tangential angle, and the height of the spindle motor () relative to the base chassis ().

Disk device

A data recording device that can easily and reliably manage a plurality of recording media or information recording surfaces even when a data compression rate largely varies with the contents of the data and that can record, for example, mass image data by effectively preventing the picture quality of an image represented by the image data from being degraded. The data recording device records image data after securing a region according to the preliminarily estimated number of recording media or information recording surfaces at the time of recording image data by using a coding method, by which a data compression rate largely varies with the contents of data. Thereafter, the data recording device records management data used for managing the plurality of recording media or information recording surfaces, on which the coded data is recorded, on the management region according to a result of recording.

Data recording device, data reproducing device and data recording medium for managing encoded data over a plurality of recording media

A data recording device that can easily and reliably manage a plurality of recording media or information recording surfaces even when a data compression rate largely varies with the contents of the data and that can record, for example, mass image data by effectively preventing the picture quality of an image represented by the image data from being degraded. The data recording device records image data after securing a region according to the preliminarily estimated number of recording media or information recording surfaces at the time of recording image data by using a coding method, by which a data compression rate largely varies with the contents of data. Thereafter, the data recording device records management date used for managing the plurality of recording media or information recording surfaces, on which the coded data is recorded, on the management region according to a result of recording.

Growing community of inventors

Kanagawa, Japan

Kazuyuki Honda