OPTICAL DISC AND OPTICAL DISC DEVICE - MITSUBISHI ELECTRIC CORP

Title:

OPTICAL DISC AND OPTICAL DISC DEVICE

Document Type and Number:

WIPO Patent Application WO/2006/087836

Kind Code:

A1

Abstract:

In an optical disc wherein a plurality of different standard information layers are formed in multilayer in one disc, there has been a problems of requiring much time for making access, since a kind of one information layer is not recorded in other information layer, and at the time of performing reading/writing by a compatible optical device corresponding to the plurality of optical disc standards, the kind of the information layer is required to be read out to select a tracking error signal generating method corresponding to the kind of the information layer each time the accessing information layer is changed. To solve such problem, information of other information layer is recorded in an area of one information layer in an optical disc wherein a plurality of different standard information layers are formed in multilayer. The access time to other information layer can be shortened by selecting the tracking error signal generating method based on the information.

Inventors:

NAKAHARA HIRONORI (JP)
TAKESHITA NOBUO (JP)
OGAWA MASAHARU (JP)

Application Number:

PCT/JP2005/015160

Publication Date:

August 24, 2006

Filing Date:

August 19, 2005

Export Citation:

Click for automatic bibliography generation Help

Assignee:

MITSUBISHI ELECTRIC CORP (JP)
NAKAHARA HIRONORI (JP)
TAKESHITA NOBUO (JP)
OGAWA MASAHARU (JP)

International Classes:

G11B7/007; G11B20/12; G11B20/10

Foreign References:

JPH11238362A	1999-08-31
JP2005038584A	2005-02-10
JP2004095005A	2004-03-25
JPH11232700A	1999-08-27
JPH09274765A	1997-10-21
JPH1166576A	1999-03-09

Other References: