Fujitsu Corporation

Tetsuya Tsuji

Shigenori Yanagi

Hiroshi Tani

Shuko Saito

Kiyoshi Obata

Nozomu Okazaki

The present invention aims at providing an inexpensive optical information storing device that produces reduced cross talk. An optical information storing device has a cyclic data output circuitthat outputs cyclic data in which values are repeated every 5 bytes, and an EXOR circuitthat calculates the exclusive-OR (EXOR) of recording data input thereto via a bufferand the cyclic data and inputs the calculation result to an RLL modulation circuitas data to be recorded.

Optical information storing device, data processing circuit and information storage medium

A constant linear velocity control (CLV control) for controlling a spindle motor so as to set a linear velocity in a track circumferential direction to be constant and a constant angular velocity control (CAV control) for controlling the spindle motor so as to set a rotation of a medium to be constant are switched and controlled for a change in position in the radial direction of the medium of a pickup in accordance with a detection result of the medium loaded. In the switching control, selection information of the CLV control and the CAV control is previously registered in accordance with the kind of medium and the CLV control or the CAV control is selected in accordance with the corresponding selection information obtained from the detection result of the medium.

Growing community of inventors

Kawasaki, Japan

Tetsuya Tsuji