Information recording medium and reproduction device

Patent metadata

Field	Value
Publication number	US-9697863-B2
Application number	US-201414917992-A
Country	US
Kind code	B2
Filing date	Apr 8, 2014
Priority date	Sep 30, 2013
Publication date	Jul 4, 2017
Grant date	Jul 4, 2017

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 for identifying a type of the information recording medium 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
a second region 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, wherein
the first region containing first address information recorded therein in a first address data format,
the second region containing second address information recorded therein in a second address data format that differs from the first address data format, and
the second address data format includes cluster addresses with a greater number of bits than a number of bits included in cluster addresses in the first address data format.

2. A playback device for playing 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; and
a second address information decoding process section that decodes the second address information recorded in 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

• G11B7/24085

  Pits · 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

• 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

• G11B20/1217

  on discs · CPC title