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Optical recording media

A technology for optical recording media and tracks, applied in optical recording media, data recording, optical recording/reproduction, etc., can solve problems such as high read error rate and read signal waveform distortion

Inactive Publication Date: 2004-02-04
PIONEER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Therefore, when the information data is obtained from having such as figure 2 When reproducing on a DVD with the recording structure shown, reading the above-mentioned deformed information pits PT1 and PT2 will cause waveform distortion in the read signal, resulting in a higher read error rate

Method used

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  • Optical recording media
  • Optical recording media
  • Optical recording media

Examples

Experimental program
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Embodiment Construction

[0024] An embodiment of the present invention will be described below with reference to the accompanying drawings.

[0025] image 3 It is a perspective view illustrating the structure of a recording surface of a writable-once or rewritable DVD as an optical recording medium according to the present invention. image 3 The structure before recording information data by the information recording / reproducing apparatus to be described later is explained.

[0026] Such as image 3 As shown, before recording information data, on the recording layer R of the DVD according to the present invention, the groove track GV (from the point of view on the figure) and the groove track LD ( Also from the point of view in the figure). Such as image 3 As shown, the DVD has a transparent substrate B connected to a recording layer R on the substrate side having groove and land tracks.

[0027] The pre-formed groove track LD has some land pre-pit LPP used by the information recording / reprodu...

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PUM

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Abstract

An optical recording medium which can produce a read signal free from waveform distortion during reproduction of information. The optical recording medium comprises groove information tracks on which information pits carrying information data is to be formed, and prepit tracks provided with a plurality of previously formed land prepits connected to the groove information tracks. The groove information tracks and the prepit tracks are arranged in alternation. The groove information track has a track width smaller in at least a part of each of sections in which the land prepit exists than in sections in which no land prepit exists.

Description

technical field [0001] The present invention relates to an optical recording medium that allows a user to record information data. Background technique [0002] Currently, a write-once type DVD-R (Digital Versatile Disc) and a rewritable DVD-RW have been commercially produced as optical recording media. [0003] figure 1 is a perspective view illustrating a recording surface and a cross-sectional structure of a DVD-R or DVD-RW (hereinafter simply referred to as "DVD"). figure 1 The structure of a DVD before information data (audio data, video data, and computer data) is recorded thereon by an information recording / reproducing apparatus is explained. [0004] Such as figure 1 As shown, before the information data is recorded, the groove track GV (convex groove tracks) (viewed from the point of view on the figure) and the groove track LD are optionally pre-formed on the recording layer R of the DVD in a spiral or concentric form. (concave land tracks) (also from the observ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/007G11B7/013
CPCG11B7/24079G11B7/24085G11B7/007G11B7/24082G11B7/261G11B2007/00709
Inventor 泷下俊彦加藤正浩村松英治堀川邦彦谷口昭史山口淳
Owner PIONEER CORP