Information recording medium and reproduction device

Patent metadata

Field	Value
Publication number	US-10636445-B2
Application number	US-201816029682-A
Country	US
Kind code	B2
Filing date	Jul 9, 2018
Priority date	Sep 30, 2013
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

An optical disk (100) of the present invention includes (i) a medium information region (101) (a) in which type identification information 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 and (b) in which first address information is recorded in a first address data format and (ii) a data region (102) (a) 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 (b) in which second address information is recorded in a second address data format.

First claim

The invention claimed is:

1. An information recording medium comprising:
a first region in which type identification information that identifies a type of the information recording medium is recorded by recesses and/or protrusions which are defined by a given modulation method and whose lengths are longer than a length of an optical system resolution limit of a playback device;
a second region in which content data is recorded by recesses and/or protrusions which are defined 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 between the first region and the second region, wherein
the first region includes first address information recorded therein in a first address data format,
the second region includes second address information recorded therein in a second address data format that differs from the first address data format,
the blank region (i) includes a portion in which the first address data format is switched to the second address data format and (ii) includes address information and no significant information other than the address information,
the first region includes first error correction encoding data and the second region includes second error correction encoding data, and
error correction encoding of third error correction encoding data in a region on an outer side of the blank region is identical to error correction encoding in the second region.

2. A playback device that plays back an information recording medium recited in claim 1 , said playback device comprising:
a first address information decoding process section that decodes the first address information recorded in the first region;
a second address information decoding process section that decodes the second address information recorded in the second region;
an error correction encoding process section of the first region; and
an error correction encoding process section of the second region, wherein
the playback device checks a playback position by use of a playback setting that plays back the second region, the playback position being checked on an inner side of a start region of the second region, and
the playback device plays back the region on the outer side of the blank region with the error correction encoding process section of the second region.

Assignees

• Sharp Kk
• Memory Tech Holdings Inc

Inventors

• Yamada Hirohisa
• Naka Takayuki
• Yamamoto Masaki
• Adachi Yoshihisa
• Tajima Hideharu
• Konishi Masahito

Classifications

• G11B7/0079 Primary

  Zoned data area, e.g. having different data structures or formats for the user data within data layer, Zone Constant Linear Velocity [ZCLV], Zone Constant Angular Velocity [ZCAV], carriers with RAM and ROM areas · CPC title

• G11B20/1217

  on discs · CPC title

• G11B7/00736

  Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information (sector headers or adresses in prepits G11B7/00745; address data in track wobble G11B7/24082) · CPC title

• G11B7/013

  for discrete information, i.e. where each information unit is stored in a distinct discrete location {, e.g. digital information formats within a data block or sector} · CPC title

• G11B27/3027

  used signal is digitally coded · CPC title