IN2012DN05111A - - Google Patents

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Publication number
IN2012DN05111A
IN2012DN05111A IN5111DEN2012A IN2012DN05111A IN 2012DN05111 A IN2012DN05111 A IN 2012DN05111A IN 5111DEN2012 A IN5111DEN2012 A IN 5111DEN2012A IN 2012DN05111 A IN2012DN05111 A IN 2012DN05111A
Authority
IN
India
Prior art keywords
write power
pint
opt
pasy
modulation
Prior art date
Application number
Inventor
Soichiro Eto
Koichi Watanabe
Harukazu Miyamoto
Original Assignee
Hitachi Consumer Electronics
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Consumer Electronics filed Critical Hitachi Consumer Electronics
Publication of IN2012DN05111A publication Critical patent/IN2012DN05111A/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0045—Recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
    • G11B7/126—Circuits, methods or arrangements for laser control or stabilisation
    • G11B7/1267—Power calibration
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
    • G11B2007/0009—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage
    • G11B2007/0013—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage for carriers having multiple discrete layers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2403—Layers; Shape, structure or physical properties thereof
    • G11B7/24035—Recording layers
    • G11B7/24038—Multiple laminated recording layers

Abstract

In write power adjustment for an optical disc having a plurality of information storage layers, data of trial writing is varied by the influence of layers other than a target layer. It is difficult, therefore, to determine optimal write power. A modulation M[m] is obtained from a reproduction signal amplitude of a signal subjected to the trial writing performed with use of write powers Pw[m] (m being an integer) of a plurality of kinds. At least an optimum write power intercept Pint - opt is determined by fitting a relation between the Pw[m] and the M[m] by a modulation characteristic formula M = Masy x (1-(Pint-Pasy)/(Pw-Pasy)) having an asymptotic modulation Masy, a write power intercept Pint, and an asymptotic write power Pasy as parameters. Approximation accuracy by the fitting andfor quality of the trial writing signal are evaluated with use of at least the M[m], the modulation characteristic formula, and the Pint-opt. An optimum write power Pw-opt is calculated by performing a specified operation at least with use of the Pint - opt.
IN5111DEN2012 2009-12-16 2010-03-02 IN2012DN05111A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009284670A JP4586106B1 (en) 2009-12-16 2009-12-16 Evaluation methods
PCT/JP2010/053299 WO2011074277A1 (en) 2009-12-16 2010-03-02 Write power adjustment method and information recording method

Publications (1)

Publication Number Publication Date
IN2012DN05111A true IN2012DN05111A (en) 2015-10-09

Family

ID=43365193

Family Applications (1)

Application Number Title Priority Date Filing Date
IN5111DEN2012 IN2012DN05111A (en) 2009-12-16 2010-03-02

Country Status (9)

Country Link
US (2) US8472293B2 (en)
EP (1) EP2515301A4 (en)
JP (1) JP4586106B1 (en)
CN (1) CN102656635B (en)
BR (1) BR112012014330A2 (en)
IN (1) IN2012DN05111A (en)
MX (1) MX2012006933A (en)
MY (1) MY152431A (en)
WO (1) WO2011074277A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103473713A (en) * 2013-09-03 2013-12-25 国家电网公司 Aid decision making method for adjusting section power

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6560190B1 (en) * 2000-10-03 2003-05-06 Oak Technology, Inc. CD-RW OPC algorithm to minimize statistical fluctuations in power level
JPWO2005029479A1 (en) * 2003-09-18 2006-11-30 松下電器産業株式会社 Recording / reproducing method and recording / reproducing apparatus
US7646686B2 (en) * 2003-11-06 2010-01-12 Panasonic Corporation Recording/reproduction apparatus which adjusts recording power based on a partial response maximum likelihood (PRML) technique
JP3902595B2 (en) * 2004-01-22 2007-04-11 三洋電機株式会社 Laser power adjusting method and optical recording / reproducing apparatus
KR101156709B1 (en) * 2005-09-07 2012-06-14 삼성전자주식회사 Method for controlling opc in optical disc system
JP2007172693A (en) * 2005-12-20 2007-07-05 Matsushita Electric Ind Co Ltd Optical disk, recording and reproducing method and device
JP4474386B2 (en) * 2006-05-30 2010-06-02 株式会社日立製作所 Recording method and optical disc apparatus
JP4580367B2 (en) * 2006-06-12 2010-11-10 株式会社日立製作所 Recording power adjusting method and optical recording / reproducing apparatus
US20090323485A1 (en) 2006-07-24 2009-12-31 Keisuke Sasaki Recording operation control device, integrated circuit, optical disc recording/reproducing device, and recording operation control method
JP4580450B1 (en) * 2009-07-03 2010-11-10 株式会社日立製作所 Recording power adjustment method, information recording method and evaluation method

Also Published As

Publication number Publication date
EP2515301A1 (en) 2012-10-24
US20130235711A1 (en) 2013-09-12
CN102656635B (en) 2015-06-17
US8472293B2 (en) 2013-06-25
JP4586106B1 (en) 2010-11-24
MY152431A (en) 2014-09-30
US8654620B2 (en) 2014-02-18
CN102656635A (en) 2012-09-05
BR112012014330A2 (en) 2016-07-05
WO2011074277A1 (en) 2011-06-23
EP2515301A4 (en) 2014-12-03
US20120250483A1 (en) 2012-10-04
JP2011129181A (en) 2011-06-30
MX2012006933A (en) 2012-07-10

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