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Optical disc and optical disc apparatus

An optical disc device, optical disc technology, applied in the direction of beam source, optical recording head, optical recording carrier, etc., can solve problems such as deterioration

Inactive Publication Date: 2008-01-23
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, even if recording is performed at the power with the best recording characteristics, from the viewpoint of the number of reproduction (tracking) times, this power will be such that a certain degree of deterioration or adverse effect occurs in the recording layer during reproduction (tracking).

Method used

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  • Optical disc and optical disc apparatus
  • Optical disc and optical disc apparatus
  • Optical disc and optical disc apparatus

Examples

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Embodiment Construction

[0018] Hereinafter, embodiments of the present invention will be described with reference to the drawings. This embodiment mode is a mode in which the present invention is applied to an HD DVD-R using a blue-violet laser and its drive device.

[0019] FIG. 1 shows the configuration of an optical disc (HD DVD-R) 100 .

[0020] As shown in the figure, an optical disc 100 is formed by forming a recording layer 12 , a reflective layer 13 , and a protective layer 14 on a substrate 11 , and then affixing a substrate 16 on the protective layer 14 via an adhesive layer 15 . Among them, the recording layer 12 is composed of a predetermined dye material.

[0021] In the recording layer 12, spiral tracks (grooves) are formed from the inner circumference to the outer circumference. Data is recorded and reproduced on this track. The track curves forward (wobbles) in the radial direction of the disk. Address information is held by this wobble. That is, a phase modulation section called...

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Abstract

A control data area of an optical disc holds correction information for correcting a recording laser power Pmax determined by performing trial writing. The recording laser power Pmax determined by trial writing is corrected on the basis of the correction information stored in the control data area, thereby setting a recording laser power Popt used for making a recording.

Description

technical field [0001] The invention relates to an optical disc and an optical disc device, which are especially suitable for setting method of recording laser power. Background technique [0002] At present, in HD DVD-R (High Definition Digital Versatile Disc-Recordable) whose commercialization is progressing, similar to existing CD-R (Compact Disc-Recordable) or DVD-R (Digital Versatile Disc-Recordable), in advance Trial writing is performed in the set trial writing area, and the initial setting of the recording laser power is performed. [0003] Here, the recording laser power is usually initially set to a power with the best recording characteristics. For example, in HD DVD-R, the recording laser power with the maximum PRSNR (Partial Response Signal to Noise Ratio) or the recording laser power with the minimum reproduction bit error rate is set as the recording laser power for the disc. [0004] However, when recording is performed with the power having the best record...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/007G11B7/004G11B7/125
CPCG11B7/1267G11B7/0045G11B7/00736G11B7/007G11B7/1263
Inventor 中尾贤治中谷守雄
Owner SANYO ELECTRIC CO LTD