IN2012DN05150A - - Google Patents

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Publication number
IN2012DN05150A
IN2012DN05150A IN5150DEN2012A IN2012DN05150A IN 2012DN05150 A IN2012DN05150 A IN 2012DN05150A IN 5150DEN2012 A IN5150DEN2012 A IN 5150DEN2012A IN 2012DN05150 A IN2012DN05150 A IN 2012DN05150A
Authority
IN
India
Prior art keywords
mark
shifi
seat
called
adjusted
Prior art date
Application number
Inventor
Takahiro Kurokawa
Hiroyuki Minemura
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 IN2012DN05150A publication Critical patent/IN2012DN05150A/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
    • G11B7/00456—Recording strategies, e.g. pulse sequences
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
    • G11B20/10212—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter compensation for data shift, e.g. pulse-crowding effects
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10268—Improvement or modification of read or write signals bit detection or demodulation methods
    • G11B20/10277—Improvement or modification of read or write signals bit detection or demodulation methods the demodulation process being specifically adapted to partial response channels, e.g. PRML decoding
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10305—Improvement or modification of read or write signals signal quality assessment
    • G11B20/10398—Improvement or modification of read or write signals signal quality assessment jitter, timing deviations or phase and frequency errors
    • G11B20/10407—Improvement or modification of read or write signals signal quality assessment jitter, timing deviations or phase and frequency errors by verifying the timing of signal transitions, e.g. rising or falling edges, or by analysing signal slopes
    • 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
    • G11B7/006—Overwriting
    • G11B7/0062—Overwriting strategies, e.g. recording pulse sequences with erasing level used for phase-change media
    • 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537—Optical discs
    • G11B2220/2541—Blu-ray discs; Blue laser DVR discs

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Optical Head (AREA)

Abstract

Provided is a recording adjustment method capable of controlling an edge position of a mark with high accuracy. Based on the acquired read-out signal waveform, a starting position of a last pulse is adjusted such that a so-called L-SEAT shifi value for an end edge of the mark becomes minimum.
IN5150DEN2012 2010-01-20 2010-03-02 IN2012DN05150A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010009627A JP4812881B2 (en) 2010-01-20 2010-01-20 Recording condition adjusting method and optical disc apparatus
PCT/JP2010/053300 WO2011089735A1 (en) 2010-01-20 2010-03-02 Method for adjusting recording condition, optical disc device, and information recording method

Publications (1)

Publication Number Publication Date
IN2012DN05150A true IN2012DN05150A (en) 2015-10-23

Family

ID=44306555

Family Applications (1)

Application Number Title Priority Date Filing Date
IN5150DEN2012 IN2012DN05150A (en) 2010-01-20 2010-03-02

Country Status (10)

Country Link
US (2) US8483028B2 (en)
EP (1) EP2528059A4 (en)
JP (1) JP4812881B2 (en)
CN (1) CN102804267B (en)
BR (1) BR112012014713A2 (en)
IN (1) IN2012DN05150A (en)
MX (1) MX2012006932A (en)
MY (1) MY173566A (en)
PH (1) PH12012501238A1 (en)
WO (1) WO2011089735A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150089481A1 (en) * 2013-09-23 2015-03-26 Infosys Limited Methods, systems and computer-readable media for quantifying a bug detection efficiency of a bug prediction technique
US10915603B2 (en) * 2016-12-09 2021-02-09 Korea Advanced Institute Of Science And Technology Method for estimating suitability as multi-screen projecting type theatre system
US9892752B1 (en) * 2017-06-15 2018-02-13 Seagate Technology Llc Selecting a maximum laser power for a calibration based on a previously measured function
JP6975914B2 (en) * 2018-03-09 2021-12-01 パナソニックＩｐマネジメント株式会社 Optical disc recording method, optical disc device and integrated circuit
CN108962284B (en) * 2018-07-04 2021-06-08 科大讯飞股份有限公司 Voice recording method and device
CN112181887B (en) * 2019-07-05 2023-05-26 迈普通信技术股份有限公司 Data transmission method and device
US12119033B1 (en) * 2023-09-21 2024-10-15 Microsoft Technology Licensing, Llc Beam balancer for optical data writing

Family Cites Families (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3926688B2 (en) 2001-07-19 2007-06-06 松下電器産業株式会社 Reproduction signal quality evaluation method and information reproduction apparatus
CN1306514C (en) * 2001-07-19 2007-03-21 松下电器产业株式会社 Evaluation method of reproduced signal quality and information reproducer
CN1306516C (en) * 2001-11-09 2007-03-21 株式会社东芝 Signal quality evaluating method, information record/recovery system and record correcting method
JP3697409B2 (en) 2001-11-09 2005-09-21 株式会社東芝 Signal quality evaluation method and recording compensation method
JP3668202B2 (en) * 2002-03-13 2005-07-06 株式会社東芝 Information recording / reproducing apparatus and signal evaluation method thereof
DE60301750T2 (en) * 2002-04-03 2006-07-06 Matsushita Electric Industrial Co., Ltd., Kadoma Device for generating an extended key, encryption device and encryption system
JP4515716B2 (en) * 2002-04-03 2010-08-04 パナソニック株式会社 Extended key generation device, encryption device, and encryption system
JP3857685B2 (en) 2003-01-28 2006-12-13 日本電気株式会社 Signal evaluation method, information recording / reproducing apparatus, information reproducing apparatus, and information medium
EP1443509A3 (en) * 2003-01-28 2006-01-11 Kabushiki Kaisha Toshiba Signal evaluation method, information recording/reproducing apparatus, information reproducing apparatus, and information recording medium
JP2005092942A (en) * 2003-09-16 2005-04-07 Hitachi Ltd Optical disc recording method, optical disc apparatus, and optical disc
JPWO2005031743A1 (en) * 2003-09-30 2006-12-07 松下電器産業株式会社 Evaluation apparatus and evaluation method
CN100570728C (en) * 2004-05-07 2009-12-16 株式会社日立制作所 Evaluation method of reproduced signal and optical disc device
JP4313755B2 (en) * 2004-05-07 2009-08-12 株式会社日立製作所 Reproduction signal evaluation method and optical disc apparatus
JPWO2006025421A1 (en) * 2004-08-31 2008-05-08 中外製薬株式会社 Use of sperm membrane protein OBF
JP3711140B2 (en) 2005-03-07 2005-10-26 株式会社東芝 Information recording / reproducing apparatus and signal evaluation method thereof
JP4604924B2 (en) * 2005-09-09 2011-01-05 株式会社日立製作所 Optical disc recording method, optical disc apparatus, and optical disc
JP2008016184A (en) * 2006-04-28 2008-01-24 Sharp Corp Recording / reproducing apparatus and recording mark forming method for recording / reproducing apparatus
JP2007317343A (en) 2006-04-28 2007-12-06 Sharp Corp RECORDING PARAMETER SETTING DEVICE, ITS PROGRAM, COMPUTER-READABLE RECORDING MEDIUM CONTAINING THE PROGRAM, INFORMATION RECORDING MEDIUM, AND RECORDING PARAMETER SETTING METHOD
JP5089939B2 (en) * 2006-08-11 2012-12-05 ソニーオプティアーク株式会社 Recording / reproducing apparatus, evaluation value calculation method
JP5057925B2 (en) * 2007-10-18 2012-10-24 株式会社日立製作所 Digital information playback method
US20090154315A1 (en) * 2007-12-04 2009-06-18 Panasonic Corporation Information recording medium, recording method, recording apparatus and integrated circuit
JP2009170043A (en) * 2008-01-17 2009-07-30 Nec Corp Recording strategy adjusting method and information recording/playback apparatus
JP5081737B2 (en) * 2008-06-18 2012-11-28 株式会社日立製作所 Optical information recording method, optical information reproducing method, and optical disc apparatus
JP4764939B2 (en) * 2009-04-14 2011-09-07 株式会社日立製作所 Recording condition adjusting method and optical disc apparatus
JP4959749B2 (en) * 2009-05-08 2012-06-27 株式会社日立製作所 Recording condition adjusting method and optical disc apparatus
JP5469390B2 (en) * 2009-07-15 2014-04-16 日立コンシューマエレクトロニクス株式会社 Reproduction signal evaluation method and recording adjustment method

Also Published As

Publication number Publication date
US8743671B2 (en) 2014-06-03
BR112012014713A2 (en) 2016-03-08
US20120250480A1 (en) 2012-10-04
JP4812881B2 (en) 2011-11-09
EP2528059A4 (en) 2017-04-19
CN102804267B (en) 2015-03-25
MX2012006932A (en) 2012-08-23
US8483028B2 (en) 2013-07-09
WO2011089735A1 (en) 2011-07-28
PH12012501238A1 (en) 2014-09-24
EP2528059A1 (en) 2012-11-28
MY173566A (en) 2020-02-04
JP2011150748A (en) 2011-08-04
CN102804267A (en) 2012-11-28
US20130242714A1 (en) 2013-09-19

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