Title:
INFORMATION RECORDING AND PLAYBACK DEVICE AND RECORDING METHOD
Document Type and Number:
WIPO Patent Application WO/2014/162580
Kind Code:
A1
Abstract:
Due to properties of a hologram recording medium, according to a formation state of an already-recorded hologram recording unit, optimal recording positions when performing recording of recording units in the vicinity of the already-recorded recording unit are different. Specifically, if within a specific amount of time from having performed recording of one recording unit, it is possible to record the next recording unit in a region separated by a first interval; however, after a predetermined amount of time has elapsed, it is necessary to record the next recording unit in a region separated by a second interval. To this end, a recording method that is suitable for the above-mentioned properties is desired, and therefore, it is necessary to provide a suitable recording method for hologram recording. A recording and playback device for an optical information recording medium is characterized by: having a drive unit which executes data recording to the optical information recording medium, and a control unit which controls recording and playback by the drive unit; and the drive unit, when recording data to the vicinity of an already-recorded recording unit in a recording medium for which positions of recording units are established in advance, recording to the recording unit region that is closest to the already-recorded recording unit if the amount of time that has elapsed since performing recording to the already-recorded recording unit is less than a predetermined amount of time, and, if the amount of time that has elapsed since performing recording to the already-recorded recording unit is greater than or equal to the predetermined amount of time, recording the data to a recording unit at a position that is separated by at least one recording unit from the already-recorded recording unit.
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Inventors:
NISHIURA HIROMI (JP)
ISHITOBI TATSUYA (JP)
ISHITOBI TATSUYA (JP)
Application Number:
PCT/JP2013/060422
Publication Date:
October 09, 2014
Filing Date:
April 05, 2013
Export Citation:
Assignee:
HITACHI CONSUMER ELECTRONICS (JP)
International Classes:
G11B7/0065; G03H1/26
Domestic Patent References:
| WO2007049578A1 | 2007-05-03 |
Foreign References:
| JP2007305230A | 2007-11-22 |
Attorney, Agent or Firm:
INOUE, Manabu et al. (JP)
Manabu Inoue (JP)
Manabu Inoue (JP)
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