Patent Number: 7,821,888

Title: Optical disk reproducing apparatus with a disk identifying function

Abstract: An optical disk reproducing apparatus has a circuit for detecting a difference in modulation scheme between two types of optical disks in a reproduction signal and a circuit for determining the modulation schemes of the disks on the basis of the difference. Thus the apparatus can reproduce the two optical disks with use of the circuit which determines the modulation schemes of the disks to be reproduced.

Inventors: Nakamura; Yusuke (Yokohama, JP), Ikeda; Masakazu (Odawara, JP), Takeuchi; Toshifumi (Yokohama, JP)

Assignee: Hitachi, Ltd.

International Classification: G11B 15/02 (20060101)

Expiration Date: 2018-10-26 0:00:00