Title:
光ディスク再生システム
Document Type and Number:
Japanese Patent JP4766207
Kind Code:
B2
Abstract:
To solve a problem that time is required for access in an optical disc in which information layers of a plurality of different optical disc standards are multilayered on a single disc.SOLUTION: The optical disk is provided with a BD layer as a first data layer having a management area in a circumferential track scanned by a first laser beam. The management area includes: data indicating presence/absence of a second data layer scanned by a second laser beam having a longer wavelength than the first laser beam; and data indicating presence/absence of a third data layer scanned by a third laser beam having a wavelength longer than the second laser beam; respectively in the form of 2 bits. When the second data layer is absent, the presence/absence of the second data layer is indicated by the data 00 in 2 bits. When the third information layer is not present, the presence/absence of the third data layer is indicated by the data 00 in 2 bits.SELECTED DRAWING: Figure 6
Inventors:
Hironori Nakahara
Nobuo Takeshita
Masaharu Ogawa
Nobuo Takeshita
Masaharu Ogawa
Application Number:
JP2011087514A
Publication Date:
September 07, 2011
Filing Date:
April 11, 2011
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
G11B7/007; G11B7/004; G11B7/005; G11B7/09; G11B7/24041; G11B7/24097
Domestic Patent References:
| JP2003308631A | ||||
| JP2004095005A | ||||
| JP11232700A | ||||
| JP2004199757A | ||||
| JP2004206849A | ||||
| JP1186338A | ||||
| JP2006155830A |
Attorney, Agent or Firm:
Shogo Takahashi
Tadahiko Inaba
Kanako Murakami
Nakatsuru Kazutaka
Tadahiko Inaba
Kanako Murakami
Nakatsuru Kazutaka