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Title:
OPTICAL INFORMATION RECORDING METHOD, OPTICAL INFORMATION RECORDING DEVICE, OPTICAL INFORMATION REPRODUCTION METHOD, OPTICAL INFORMATION REPRODUCTION DEVICE AND OPTICAL INFORMATION RECORDING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2011/074267
Kind Code:
A1
Abstract:
Disclosed is an optical information recording device whereby high-quality recording or reproduction of information is achieved in every information layer of an optical information recording medium. A record waveform producing unit (112) selects a control parameter for controlling a record pulse sequence for forming a mark, according to a combination of the length of a mark, the length of a first space immediately before the mark, and the length of a second space immediately after the mark. A laser driver circuit (111) records a mark according to the record pulse sequence controlled by the selected control parameter. The first space length is classified into m categories (m is an integer). The second space length is classified into n categories (n is an integer). The absolute value of a difference between two predetermined control parameters among (m×n) control parameters selected at the time of recording in a second information layer among N information layers, which is located closer to the side on which a laser beam is incident than is a predetermined first information layer, is greater than or equal to the absolute value of a difference between two predetermined control parameters among (m×n) control parameters selected at the time of recording in the first information layer.

Inventors:
TAKAOKA, Tomoyasu (())
高岡 友康 (())
FURUMIYA, Shigeru (())
Application Number:
JP2010/007309
Publication Date:
June 23, 2011
Filing Date:
December 16, 2010
Export Citation:
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Assignee:
PANASONIC CORPORATION (1006, Oaza Kadoma Kadoma-sh, Osaka 01, 〒5718501, JP)
パナソニック株式会社 (〒01 大阪府門真市大字門真1006番地 Osaka, 〒5718501, JP)
TAKAOKA, Tomoyasu (())
高岡 友康 (())
International Classes:
G11B7/0045; G11B7/125
Domestic Patent References:
WO2003090215A1
Foreign References:
JP2009134785A
JP2008123652A
JP2008506211A
JP2003242644A
Attorney, Agent or Firm:
KOTANI, Etsuji et al. (Osaka Nakanoshima Building 2nd Floor, 2-2 Nakanoshima 2-chome, Kita-ku, Osaka-sh, Osaka 05, 〒5300005, JP)
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