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Title:
OPTICAL DISK RECORDING METHOD, OPTICAL DISK DEVICE, AND INTEGRATED CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2019/171881
Kind Code:
A1
Abstract:
A mark corresponding to recording data is formed on an optical disk medium by: encoding the recording data in accordance with a modulation code and thus generating encoded data; classifying the encoded data by a combination of at least two of the following run lengths of marks and spaces in the encoded data, namely the mark length of a mark in question, the space length of a leading space, the mark length of a leading mark, and the space length of a trailing space; setting a correction amount for adjusting the position of the start edge and the end edge of a recording pulse on the basis of an evaluation index of a decoding result, which is a result of decoding a reproduction signal of the encoded data using maximum-likelihood decoding of a PRML scheme, for each of the classification; generating the recording pulse corresponding to the encoded data by using the correction amount corresponding to the classification of the run length of the encoded data; and changing optical beam power in a plurality of stages with the recording pulse and irradiating the optical disk with the optical beams.

Inventors:
NAKAMURA Atsushi
KOKURA Takeshi
Application Number:
JP2019/004695
Publication Date:
September 12, 2019
Filing Date:
February 08, 2019
Export Citation:
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Assignee:
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD. (1-61, Shiromi 2-chome Chuo-ku, Osaka-sh, Osaka 07, 〒5406207, JP)
International Classes:
G11B7/0045; G11B20/10
Domestic Patent References:
WO2010041404A12010-04-15
WO2017126330A12017-07-27
Foreign References:
JP2011150748A2011-08-04
Attorney, Agent or Firm:
Eikoh Patent Firm, P.C. (Toranomon East Bldg. 10F, 7-13 Nishi-Shimbashi 1-chome, Minato-k, Tokyo 03, 〒1050003, JP)
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