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Information recording medium and disc

An information recording and medium technology, which is applied in the field of discs for manufacturing the information recording medium, can solve the problems of phase inconsistency, phase inconsistency, and reduce the characteristics of optical discs, and achieve the effect of suppressing phase inconsistency

Inactive Publication Date: 2014-07-23
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if Figure 15 As shown, it is not possible to make the adjacent wobbles on the inner and outer circumference sides coincide with the phases in the existing CLV format compatible optical discs
Therefore, the phase between adjacent wobbles is not consistent, and the characteristics of the disc are reduced

Method used

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  • Information recording medium and disc
  • Information recording medium and disc
  • Information recording medium and disc

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0038] 1. First Embodiment (Example of Optical Disc Using Disc Angle Area Division Type)

[0039] 1-1. Overview

[0040] 1-2. Structure of the disc

[0041] 1-3. Format of CD-ROM

[0042] 1-4. Structure of the disc

[0043] 1-5. Disk format

[0044] 1-6. Effect

no. 2 approach

[0045] 2. Second Embodiment (Example Using 90° Phase Type Optical Disc)

[0046] 2-1. Overview

[0047] 2-2. Format of CD-ROM

[0048] 2-3. Effect

[0049] 3. Variations

[0050] 1. First Embodiment

[0051] 1-1. Overview

[0052]The first embodiment is an optical disk in which the phases of adjacent wobbles in most areas are set to the same phase by arranging wobbles for the device and varying the wobble length within the allowable error range of the existing CLV type optical disk format.

[0053] Taking the BDXL format as an example, in the case where the wobble length is a standard value, there are about 37,500 wobbles per track in the innermost circumference of the user area. In terms of swing length, an error of about 0.12% was identified. In other words, even if there is a difference corresponding to the average wobble length of about ±46 wobbles per track, the wobble length is within the allowable error range. By changing the wobble length small (which can be suf...

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Abstract

The invention discloses an information recording medium and a disc. The information recording medium includes a plurality of wobbled tracks, in which a phase mismatch range of an adjacent wobble is a portion of a range of one track.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of Japanese Priority Patent Application JP2013-009294 filed on Jan. 22, 2013, the entire contents of which are hereby incorporated by reference. technical field [0003] The present invention relates to an information recording medium and a disc. In particular, the present invention relates to an information recording medium having a plurality of wobble tracks and a disc for manufacturing the information recording medium. Background technique [0004] In order to generate blocks and addresses, there are many optical discs of the write-once and rewritable (R / RE) The CLV (Constant Linear Velocity) type disc format employs the wobble method. The wobble phase difference between adjacent tracks varies continuously in prior art CLV format compatible optical discs. If the wobble phase difference between adjacent tracks satisfies some conditions, the cause of deterioration of recording an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/24073
CPCG11B7/0053G11B7/24082G11B2007/00754G11B7/007
Inventor 铃木雄一高桥谦作安藤伸彦井上哲也天宅丰中川弘昭
Owner SONY CORP
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