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Optical recording media

An optical recording medium and track technology, which can be used in optical record carriers, data recording, recording/reproducing by optical methods, etc., and can solve the problems of read signal waveform distortion and high read bit error rate.

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] Thus, when starting from figure 2 When the illustrated DVD with the recorded structure reproduces information data, waveform distortion occurs especially in the read signal generated by reading the above-mentioned deformed pit point PTX, resulting in a higher read bit error rate

Method used

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  • Optical recording media
  • Optical recording media
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Embodiment Construction

[0019] An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0020] 3 is a perspective view illustrating a recording surface and a cross section of a write-once or rewritable DVD as an optical recording medium according to the present invention. FIG. 3 illustrates the structure of a DVD before information data is recorded by a DVD recorder (not shown).

[0021] As illustrated in FIG. 3, the recording surface of a DVD is alternately formed with groove tracks GV that are convex (when viewed from the viewpoint of the figure) and concave (similarly, when viewed from the viewpoint of the diagram) spirally or concentrically. When looking at) the land track LD. in such as figure 1 In the arrangement shown, the DVD has a transparent substrate B with a recording layer R attached to the surface of the substrate having groove and land tracks.

[0022] When a DVD recorder records information data (audio data, video data ...

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PUM

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Abstract

An optical recording medium is designed to generate a read signal free from waveform distortion during reproduction of information. The optical recording medium is formed with information tracks on which data pits carrying information data is to be formed, and prepit tracks previously formed with a plurality of prepits. Each of the information tracks and each of the prepit tracks are positioned adjacent to each other, and each of the prepits is formed to be spaced apart from adjacent information tracks in at least its bottom part.

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 (Digital Versatile Disc)-R and a rewritable DVD-RW have been commercially produced as optical recording media. [0003] figure 1 is a perspective view illustrating the recording surface and cross-sectional structure of a DVD-R or DVD-RW (hereinafter simply referred to as "DVD") before recording information data. [0004] Such as figure 1 As illustrated in , the convex (when viewed from the point of view of the figure) groove track GV and the concave (similarly, when seen from the point of view of the figure) land track LD alternate spirally or concentrically Formed on the recording layer R of DVD. Such as figure 1 As shown, a DVD has a transparent substrate B having a recording layer R attached to its surface having grooves and land tracks. [0005] The land track LD is equipped...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/007
CPCG11B7/00745Y10T428/21G11B7/007G11B7/24079G11B7/24082G11B7/24085G11B2007/00709
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