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Optical disc with rewritable area and read-only area

An optical disc, rewriting technology, applied in partitioned data areas, optical record carriers, optical recording/reproduction, etc., can solve the problems of data mixing, reduce the use efficiency of optical discs, etc., achieve effective data format, and will not waste optical discs effect of space

Inactive Publication Date: 2004-06-30
PANASONIC CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the two areas are too close to the boundary between them, the data in the two areas may be mixed; if the two areas are too far apart, the disc usage efficiency is reduced

Method used

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  • Optical disc with rewritable area and read-only area
  • Optical disc with rewritable area and read-only area
  • Optical disc with rewritable area and read-only area

Examples

Experimental program
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Effect test

no. 1 example

[0053] figure 1 It is a plan view of an optical disc 1 constructed according to the present invention. The optical disc 1 includes a rewritable area 2 which can be recorded or reproduced, a read-only area 3 which can only be reproduced, a rewritable area 4, a read-only area 6, and a rewritable area from the inner circumference side of the optical disc. Write zone 7.

[0054] The guide area 5 located on the inner peripheral side of the optical disc includes a rewritable area 2 , a read-only area 3 , and a rewritable area 4 . The rewritable areas 2 and 4 in the boot area 5 are used to detect the recording characteristics of the optical disc, and the read-only area 3 is an area for recording the characteristics and format of the optical disc 1 .

[0055] The data area 8 is located on the outer peripheral side of the boot area 5 and includes a read-only area 6 and a rewritable area 7 . Audio data and video data can be recorded in the data area 8 .

[0056] obviously figure 1 ...

no. 2 example

[0107] Figure 9 and Figure 10 A second embodiment of an optical disc comprising a rewritable area and a read-only area constituted according to the present invention is shown. The optical disc constructed according to the second embodiment of the present invention differs from the optical disc constituted according to the first embodiment in that an additional top surface 11a and 11c is provided adjacent to the ending track top surface 11a and the starting track 11s. , and changed the data format in the read-only area.

[0108] The additional top surface is first described below. It should first be pointed out that recording any kind of data in the additional top surfaces 11b and 11c is prohibited. This prohibition of data recording is realized by recording information stating that recording is prohibited in the read-only area 3 of the boot area 5 .

[0109]In the example shown in FIG. 9, the width Pc of the additional top surfaces 11b and 11c is 3.26 micrometers, which is...

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PUM

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Abstract

An optical disc having both rewritable area and read-only area is disclosed. The rewritable area has a single spiral pattern of start track land at a leading edge, and a single spiral pattern of end track land at a trailing edge, whereby portions of the physical address area PID deviated approximately Pa / 2 from the track of the rewritable area are being intruded into the start track land and the end track land.

Description

technical field [0001] The present invention relates to an optical disc having a recordable and reproducible area (hereinafter referred to as "rewritable area") and a reproducible-only area (hereinafter referred to as "read-only area"). Background technique [0002] A problem that arises when an optical disc contains both a rewritable area and a read-only area is how to determine the boundary between the rewritable area and the read-only area. If the two zones are too close to the boundary between them, the data in the two zones may be mixed; if the two zones are too far apart, disc usage efficiency is reduced. Contents of the invention [0003] Therefore the object of the present invention is to solve the above-mentioned problems and to provide a new optical disc, according to which the positioning conditions of the boundary area between the rewritable area and the read-only area are defined so that the mixing of data in the two areas does not occur, Moreover, the rewrit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/00G11B7/004G11B7/007G11B7/30
CPCG11B7/00718G11B7/0079G11B7/00736G11B7/007G11B7/00745
Inventor 竹村佳也大原俊次石田隆佐藤勋中根和彦长泽雅人石田祯宣
Owner PANASONIC CORP