Title:
情報記録媒体および再生装置
Document Type and Number:
Japanese Patent JP6549809
Kind Code:
B2
Abstract:
An information recording medium (300) comprises a first region (301) in which type identification information for identifying a type of the information recording medium (300) is recorded by recesses and/or protrusions which are formed by a given modulation method and whose lengths are longer than a length of an optical system resolution limit of a playback device (1), a second region (302) in which content data is recorded by recesses and/or protrusions which are formed by the given modulation method and which include a recess and/or a protrusion whose length is shorter than the length of the optical system resolution limit, and a blank region (303) between the first region and the second region. Here, the first region (301) contains first address information recorded therein in a first address data format, the second region (302) contains second address information recorded therein in a second address data format that differs from the first address data format, the blank region (303) is constituted by a group of recesses and/or protrusions in which no significant information other than an address is recorded, wherein a region of the blank region (303) which is closer to the first region (301) is provided with recesses and/or protrusions which are formed by the given modulation method, whose lengths are longer than the length of the optical system resolution limit, and which are suited to the first address data format, and a region of the blank region (303) which is closer to the second region (302) is provided with recesses and/or protrusions which are formed by the given modulation method, which include a recess and/or a protrusion whose length is shorter than the length of the optical system resolution limit, and which are suited to the second address data format, and the second region (302) has a track pitch shorter than that of the first region (301).
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Inventors:
Hirohisa Yamada
Nakayuki
Maki Yamamoto
Yoshihisa Adachi
Hideharu Tajima
Masato Konishi
Nakayuki
Maki Yamamoto
Yoshihisa Adachi
Hideharu Tajima
Masato Konishi
Application Number:
JP2019031844A
Publication Date:
July 24, 2019
Filing Date:
February 25, 2019
Export Citation:
Assignee:
Sharp Corporation
Memory-Tech Holdings Corporation
Memory-Tech Holdings Corporation
International Classes:
G11B7/007; G11B20/10; G11B20/12
Domestic Patent References:
| JP2008262667A | ||||
| JP2003346384A | ||||
| JP7065404A | ||||
| JP7220284A | ||||
| JP9231578A | ||||
| JP2010086581A | ||||
| JP2001312861A | ||||
| JP2003323722A |
Foreign References:
| WO2011111346A1 |
Attorney, Agent or Firm:
Harakenzo world patent & trademark