Write-once storage medium capable of recording data blocks on both land and groove of spiral track

Patent metadata

Field	Value
Publication number	US-10049697-B2
Application number	US-201615298627-A
Country	US
Kind code	B2
Filing date	Oct 20, 2016
Priority date	May 20, 2014
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

An information recording method of the present disclosure is an information recording method for recording information on a write-once information recording medium, including one or more recording layers, each of the recording layers being spiral-shaped on which a land track and a groove track are alternately repeated as recording tracks, each of the recording tracks being divided into blocks, each of the blocks being a minimum unit in which recording is performed. The information recording method includes: recording the information on the information recording medium in a unit of each of the blocks; and controlling recording on the information recording medium. In the control step, switching is performed whether to perform recording in a block to be recorded in which the information is to be recorded next among the blocks based on recording conditions of the recording tracks adjacent on both sides of the block to be recorded.

First claim

What is claimed is:

1. An information recording method for recording information on a write-once information recording medium,
the information recording medium comprising one or more recording layers, each of the recording layers being spiral-shaped on which a land track and a groove track are alternately repeated as recording tracks, each of the recording tracks being divided into blocks, each of the blocks being a minimum unit in which recording is performed,
the information recording method comprising the steps of:
recording the information on the information recording medium in a unit of each of the blocks; and
controlling recording the information on the information recording medium,
wherein in the controlling, where the information includes a user data to be recorded,
switching is performed to determine whether to perform recording in a block to be recorded in which the information is to be recorded next among the blocks based on recording conditions of the recording tracks adjacent on both sides of the block to be recorded, and
when the recording conditions of the recording tracks adjacent on both sides of the block to be recorded are uniform with respect to a recorded/unrecorded state, control is performed so as to record the information in the block to be recorded, and

wherein in the controlling, when the recording conditions of the recording tracks adjacent on both sides of the block to be recorded are different from each other, control is performed so as not to record the information in the block to be recorded, but so as to record the information in another block with the recording conditions of the adjacent recording tracks being uniform with respect to the recorded/unrecorded state.

2. The information recording method according to claim 1 , wherein
the information recording medium comprises a data area that records the user data,
the data area comprises:
a user data area that records the user data; and
a spare area including an alternate area for a substitute of the user data area, and

in the controlling, control is performed so as to record the user data in the spare area when the block to be recorded is the block included in the user data area and the recording conditions of the recording tracks adjacent on both sides of the block to be recorded differ from each other.

3. The information recording method according to claim 2 , wherein
the information recording medium further comprises a management information area that records management information, and
in the controlling, recording in the management information area is controlled so as to perform recording on one of the groove track and the land track after recording is performed on all of the other one of the groove track and the land track.

4. The information recording method according to claim 2 , wherein
the information recording medium further comprises a management information area that records management information, and
in the controlling, recording in the management information area is controlled so as to perform recording on only one of the recording tracks of the land track and the groove track.

5. An information recording method for recording information on a write-once information recording medium,
the information recording medium comprising one or more recording layers, each of the recording layers being spiral-shaped on which a land track and a groove track are alternately repeated as recording tracks, each of the recording tracks being divided into blocks, each of the blocks being a minimum unit in which recording is performed,
the information recording method comprising the steps of:
recording the information on the information recording medium in a unit of each of the blocks; and
controlling recording the information on the information recording medium,
wherein in the controlling, where the information includes a user data to be recorded,
switching is performed to determine whether to perform recording in a block to be recorded in which the information is to be recorded next among the blocks based on recording conditions of the recording tracks adjacent on both sides of the block to be recorded, and
when the recording conditions of the recording tracks adjacent on both sides of the block to be recorded are uniform with respect to a recorded/unrecorded state, control is performed so as to record the information in the block to be recorded, and

wherein the recording conditions of the recording tracks adjacent on both sides of the block to be recorded being uniform with respect to the recorded/unrecorded state includes the recording tracks adjacent on both sides of the block to be recorded being all recorded or all unrecorded.

6. An information recording device for recording information on a write-once information recording medium,
the information recording medium comprising one or more recording layers, each of the recording layers being spiral-shaped on which a land track and a groove track are alternately repeated as recording tracks, each of the recording tracks being divided into blocks, each of the blocks being a minimum unit in which recording is performed,
the information recording device comprising:
a recorder that records the information on the information recording medium in a unit of each of the blocks; and
a controller that controls recording of the recorder,
wherein the controller controls, where the information includes a user data to be recorded, whether to perform recording in a block to be recorded in which the information is to be recorded next among the blocks based on recording conditions of the recording tracks adjacent on both sides of the block to be recorded, and
when the recording conditions of the recording tracks adjacent on both sides of the block to be recorded are uniform with respect to a recorded/unrecorded state, the controller performs control so as to record the information in the block to be recorded, and
wherein when the recording conditions of the recording tracks adjacent on both sides of the block to be recorded are different from each other, the controller performs control so as not to record the information in the block to be recorded, but so as to record the information in another block with the recording conditions of the adjacent recording tracks being uniform with respect to the recorded/unrecorded state.

7. The information recording device according to claim 6 , wherein
the information recording medium comprises a data area that records the user data,
the data area comprises:
a user data area that records the user data; and
a spare area including an alternate area for a substitute of the user data area, and

the controller performs control so as to record the user data in the spare area when the block to be recorded is the block included in the user data area and the recording conditions of the recording tracks adjacent on both sides of the block to be recorded differ from each other.

8. The information recording device according to claim 7 , wherein
the information recording medium further comprises a management information area that records management information, and
the controller controls recording in the management information area so as to perform recording on one of the groove track and the land track after recording is performed on all of the other one of the groove track and the land track.

9. The information recording device according to claim 7 , wherein
the information recording medium further comprises a management information area that records management information, and
the controller controls recording in the management information area so as to perform recording on only one of the recording tracks of the land track and the groove trac

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Takahashi Yoshihisa
• Yoshimi Akihito
• Takauchi Kenji
• Hino Yasumori
• Ito Motoshi

Classifications

• G11B2020/1238

  track, i.e. the entire a spirally or concentrically arranged path on which the recording marks are located · CPC title

• G11B7/00718

  Groove and land recording, i.e. user data recorded both in the grooves and on the lands · CPC title

• G11B20/1217 Primary

  on discs · CPC title

• G11B20/10

  Digital recording or reproducing · CPC title

• G11B7/0045

  Recording (G11B7/006, G11B7/0065 take precedence) · CPC title