Information recording medium and reproduction device

Patent metadata

Field	Value
Publication number	US-10043545-B2
Application number	US-201715609346-A
Country	US
Kind code	B2
Filing date	May 31, 2017
Priority date	Sep 30, 2013
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

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 contains first address information recorded therein in a first address data format,
the second region contains second address information recorded therein in a second address data format that differs from the first address data format,
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, and
the second region has a track pitch that is shorter than a track pitch of the first region.

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,
said playback device having a function of being suited to both the track pitch of the first region and the track pitch 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

• G11B27/3027

  used signal is digitally coded · 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

• 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