Optical information medium having multiple layers with management information areas disposed at the same distance from center

Patent metadata

Field	Value
Publication number	US-9792942-B2
Application number	US-201615153101-A
Country	US
Kind code	B2
Filing date	May 12, 2016
Priority date	May 18, 2015
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

A write-once type information recording medium according to one aspect of the present disclosure includes at least one recording layer. In the information recording medium, the at least one recording layer has a spiral shape in which a land track and a groove track are alternately arranged as a recording track, the recording track is divided into blocks each of which being minimum unit in which recording is performed, and the information recording medium includes a management information area where management information is recorded and a user data area where user data is recorded. Each of the management information areas of both the land track and the groove track on each recording layer of the at least one recording layer is disposed at a same distance from the center of the information recording medium.

First claim

What is claimed is:

1. A write-once type information recording medium comprising at least two recording layers,
wherein each of the at least two recording layers has a spiral shape in which a land track and a groove track are alternately arranged as a recording track, the recording track is divided into blocks each of which being a minimum unit in which recording is performed,
each of the at least two recording layers includes (i) a disc management area, where management information is recorded and a user data area where user data is recorded, on the land track and (ii) another disc management area and another user data area on the groove track, and
the disc management areas of both the land track and the groove track of the at least two recording layers are disposed at a same distance from the center of the information recording medium.

2. The information recording medium according to claim 1 , wherein the disc management areas are sequentially used starting from the disc management area on a recording layer which is farthest from a surface of the information recording medium to the disc management area on a recording layer which is closest to the surface of the information recording medium.

3. The information recording medium according to claim 2 , wherein the disc management areas on each recording layer of the at least two recording layers are used starting from a first track, which is a predetermined one of the groove track and the land track, to a second track, which is the other one of the groove track and the land track.

4. The information recording medium according to claim 3 , wherein the disc management areas on each of the at least two recording layers include a temporary disc management area where the management information is temporarily recorded and a confirmed disc management area where the management information is confirmedly recorded, and
in each of the at least two recording layers, the confirmed disc management area is disposed at a predetermined position in the disc management area on the second track.

5. The information recording medium according to claim 4 , wherein, during finalize processing in which additional recording is prohibited, the latest management information is recorded in the confirmed disc management area on the recording layer closest to the surface of the recording medium.

6. The information recording medium according to claim 1 , wherein the management information includes a recording prohibition state flag indicating whether finalize processing has been performed, and
during the finalize processing, the recording prohibition state flag is recorded so as to indicate that the finalize processing has been performed.

7. An information recording method for recording information on a write-once type information recording medium including at least two recording layers,
wherein each of the at least two recording layers has a spiral shape in which a land track and a groove track are alternately arranged as a recording track, the recording track being divided into blocks each of which being a minimum unit in which recording is performed,
the information recording medium includes disc management areas where management information is recorded and a user data area where user data is recorded,
each of the disc management areas of both the land track and the groove track on each recording layer of the at least two recording layers is disposed at a same distance from the center of the information recording medium, and
the at least two recording layers are sequentially used starting from a position farthest from a surface of the information recording medium to a position closest to the surface of the information recording medium.

8. The information recording method according to claim 7 , wherein the disc management areas on each of the at least two recording layers include a temporary disc management area where the management information is temporarily recorded and a confirmed disc management area where the management information is confirmedly recorded,
in each of the at least two recording layers, the confirmed disc management area is disposed at a predetermined position in the disc management area of the recording track used in one of the land track and the groove track, and
in each recording layer of the at least two recording layers, the latest management information is recorded in the confirmed disc management area after being recorded in the temporary disc management area.

9. The information recording method according to claim 8 , wherein, in performing finalize processing in which additional recording is prohibited, the latest management information is recorded in the confirmed disc management area on the recording layer closest to the surface of the recording medium.

10. The information recording method according to claim 7 , wherein the management information includes a recording prohibition state flag indicating whether finalize processing has been performed, and
in performing the finalize processing, the recording prohibition state flag is recorded so as to indicate that the finalize processing has been performed.

11. An information recording device that records information on a write-once type information recording medium including at least two recording layers,
the at least two recording layers of the information recording medium having a spiral shape in which a land track and a groove track are alternately arranged as a recording track, the recording track being divided into blocks each of which being a minimum unit in which recording is performed,
the information recording medium including disc management areas where management information is recorded and a user data area where user data is recorded,
each of the disc management areas of both the land track and the groove track on each recording layer of the at least two recording layers is disposed at a same distance from the center of the information,
the information recording device comprising:
an optical pickup that irradiates the information recording medium with a laser beam;
a mechanical controller that controls the optical pickup; and
a recording part that controls the recording of the management information and the user data,
wherein the recording part controls the recording of the management information in the disc management area such that the recording is sequentially performed starting from a position farthest from a surface of the information recording medium to a position closest to the surface of the information recording medium with respect to the at least two recording layers.

12. The information recording device according to claim 11 , wherein the disc management areas on each of the at least two recording layers include a temporary disc management area where the management information is temporarily recorded and a confirmed disc management area where the management information is confirmedly recorded,
in each of the at least two recording layers, the confirmed disc management area is disposed at a predetermined position in the disc management area of the recording track used in one of the land track and the groove track, and
in the at least two recording layers, the recording part performs control such that the latest management information is recorded in the confirmed disc management area after being recorded in the temporary disc management area.

13. The information recording device according to claim 12 , wherein, in performing finalize processing in which additional recording is prohibited, on the information recording medium, the recording part performs control such that the latest management information is recorded in the

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Takahashi Yoshihisa
• Kato Hisae
• Ito Motoshi

Classifications

• G11B7/00745

  Sectoring or header formats within a track (formats in general G11B20/12) · CPC title

• G11B2007/00709

  Dimensions of grooves or tracks, e.g. groove depth, track pitch · CPC title

• G11B2020/1227

  one layer of multilayer disc · CPC title

• G11B7/007

  Arrangement of the information on the record carrier, e.g. form of tracks {, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track} · CPC title

• G11B20/1217

  on discs · CPC title