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Optical disc, optical disc recording/playback apparatus, and information recording/playback method

A reproducing device, a technology for optical disc recording, applied in optical recording/reproducing/erasing methods, recording information storage, recording/reproducing by optical methods, etc., can solve problems such as inability to record, inability to discriminate discs, information failure, etc. , to achieve the effect of improving convenience

Inactive Publication Date: 2013-06-05
HITACHI CONSUMER ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to read information from the boot area, its format must be known, but if the correspondence between layers and formats is not determined, it is expected that reading the information in the boot area will fail
[0009] (2) When the area for recording format information (disc management information area) is an area recorded in a high-density format, it cannot be read by a device that only corresponds to the existing standard density (= low density), and the disc cannot be discriminated
The lead area and BCA shown in Patent Document 2 are created during the manufacture of the optical disc, and cannot be recorded after manufacture.

Method used

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  • Optical disc, optical disc recording/playback apparatus, and information recording/playback method
  • Optical disc, optical disc recording/playback apparatus, and information recording/playback method
  • Optical disc, optical disc recording/playback apparatus, and information recording/playback method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] In this embodiment, the multi-layer Blu-ray Disc (BD) is aimed at a disc (hereinafter referred to as type A) whose data recording density is standard density (25GB / layer) in all layers, or high density (33GB / layer) in all layers. / layer) (hereinafter referred to as type B). The number of layers is, for example, 25 GB / layer x 4 layers and 33 GB / layer x 3 layers, both of which have an overall capacity of 100 GB. The identification method of type A and type B optical discs, and the corresponding processing method of the recording and reproducing apparatus will be described.

[0062] Table 1 comparatively shows the main parameters of the recording formats in Type A and Type B optical discs. In the optical disc of type A (25GB / layer), the shortest mark length=0.149μm, the track pitch=0.32μm, while in the optical disc of type B (33GB / layer), the shortest mark length=0.113μm, the track pitch= 0.32 μm. In addition, because the modulation rules for recording information signa...

Embodiment 2

[0084] This embodiment is aimed at an optical disc (hereinafter referred to as type C) in which a standard density (25 GB / layer) area and a high density (33 GB / layer) area coexist on the same plane (in the same layer) with data recording density. For the sake of simplicity, the number of layers is set as a single layer, but it may also be multi-layered. A type C optical disc can be recorded and reproduced by either an existing device corresponding to a standard density (25 GB / layer) or a high-density corresponding device corresponding to a high density (33 GB / layer).

[0085] Figure 6 It is a figure which shows an example of the recording format of an optical disc (type C). (a) shows a planar structure, and (b) shows a radial structure.

[0086] In a Type C optical disc, a BCA area 111, a PIC area 112, a first recording density area (25 GB / layer) 113, and a second recording density area (33 GB / layer) 114 are sequentially arranged on the same plane from the inner peripheral ...

Embodiment 3

[0114] This embodiment is aimed at a multi-layer optical disc (hereinafter referred to as type D) in which data recording density is a mixture of layers of standard density (25 GB / layer) and layers of high density (33 GB / layer). Type D optical discs can be recorded and reproduced by either an existing device for standard density (25 GB / layer) or a high-density device for high density (33 GB / layer).

[0115] Figure 11 It is a figure which shows an example of the recording format of an optical disc (type D). Here, a 25 GB / layer layer and a 33 GB / layer layer are alternately arranged in four layers. Let each recording layer be L0, L1, L2, L3 from the surface side of the optical disc. In each layer, a BCA area 121 , a PIC area 122 , and data recording areas 123 and 124 are arranged from the inner peripheral side. Data is recorded in the data recording regions 123 and 124 of the respective layers at a recording density of 25 GB / layer or 33 GB / layer. Among them, the BCA region 1...

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Abstract

For a disc on which recording is to be performed at a plurality of recording densities, a technique for easily reading out disc management information without an error is disclosed. An optical disc (1) includes a plurality of data recording areas (103,104) for recording information at data recording densities different from each other. Information regarding the data recording densities of the data recording areas(103,104) is recorded in a management information recording area (BCA area (101) or PIC area (102)) in a specific format that does not depend on the data recording densities of the data recording areas (103,104). Each data recording area is divided to be arranged on the same surface of the disc, or is divided and arranged on a plurality of recording layers.

Description

technical field [0001] The present invention relates to an optical disc for recording information at various data recording densities, an optical disc recording and reproducing device, and an information recording and reproducing method. Background technique [0002] In a high-density and large-capacity recordable optical disc, the capacity is further increased by multiplying the recording layers. For example, in a Blu-ray Disc (BD), in order to record 100 GB of information on one disc, attempts have been made to create four layers with a standard recording density of 25 GB / layer and three layers with a further higher density of 33 GB / layer. As described above, optical discs having different recording formats such as recording densities have appeared, and an optical disc device that recognizes them and performs recording and reproduction according to the format is required. [0003] As a technique related to this, for example, Patent Document 1 discloses a configuration in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/007G11B7/004G11B7/0045G11B7/005
CPCG11B20/1217G11B7/24038G11B7/00736G11B2020/122G11B2020/1227G11B27/329
Inventor 西村孝一郎榑林正明
Owner HITACHI CONSUMER ELECTRONICS CORP