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Rewritable DVD disc

A technology of optical discs and areas, applied in the direction of optical record carrier, information arrangement, digital signal formatting, etc., can solve the problems of inconvenient use

Inactive Publication Date: 2003-06-25
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When practical, the spare area will be used up quickly, causing inconvenience in use

Method used

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  • Rewritable DVD disc
  • Rewritable DVD disc
  • Rewritable DVD disc

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0014] refer to figure 2 , which shows a schematic diagram of the distribution of each area in the lead-out area in the DVD-RAM disc used in the known technology. In the figure, the lead-out area is immediately behind the user area 14 and includes an other area 30 , a drive test area 32 , a disc test area 34 and an outermost guard track area 36 . Among them, the inner diameter of the other area 30 is 57.889 mm, and the outer diameter is 47.898 mm; the inner diameter of the disc test area 32 is 57.898 mm, and the outer diameter is 57.917 mm; the inner diameter of the disc test area 34 is 57.917 mm, and the outer diameter is 57.936 mm. mm; the inner diameter of the outermost warning track area 36 is 57.936 mm, and the outer diameter is 58.493 mm.

[0015] In the design of a DVD-RAM disc, the disc test area 34 is used for testing the disc by the manufacturer of the optical disc, and the disc machine test area 32 is for the user to write to the disc. The area where the slice is...

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Abstract

By altering the position and size of exit area of DVD disk, it is possible to expand its utilized area. The expanded area may be used as user area, main space area or reserve spare area.

Description

technical field [0001] The invention relates to a DVD disc, in particular to a repeatable readable and writable DVD disc (DVD-RAM). Background technique [0002] Among the specifications of the second edition of DVD-RAM discs, one was finalized in July 1999. This specification defines the area and settings contained in the DVD-RAM disc, including: the track pitch is 0.615 microns; the total capacity of the disc is 4.726G bytes. Referring to FIG. 1A and FIG. 1B , it shows schematic diagrams of distribution of various regions in a known DVD-RAM disc. In the optical disc, a user area 14 of 4.7 Gbytes, a spare area of ​​146 megabytes (MB), a lead-in area 10 and a lead-out area 16 are included. [0003] In the above-mentioned spare area, a main spare area 12 and a supplementary spare area are included. Wherein, the size of the main spare area 12 is 26MB, and the supplementary spare area is 120MB, and the scope of the supplementary spare area is to use a part of the last zone (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/007G11B20/12
Inventor 乔作文吴国瑞黄得瑞陈威成
Owner IND TECH RES INST