WO2004068487A1 - Dispositif d'enregistrement de donnees, procede et programme d'enregistrement de donnees - Google Patents

Dispositif d'enregistrement de donnees, procede et programme d'enregistrement de donnees Download PDF

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Publication number
WO2004068487A1
WO2004068487A1 PCT/JP2004/000601 JP2004000601W WO2004068487A1 WO 2004068487 A1 WO2004068487 A1 WO 2004068487A1 JP 2004000601 W JP2004000601 W JP 2004000601W WO 2004068487 A1 WO2004068487 A1 WO 2004068487A1
Authority
WO
WIPO (PCT)
Prior art keywords
recording
data
temperature
pulse
recording medium
Prior art date
Application number
PCT/JP2004/000601
Other languages
English (en)
Japanese (ja)
Inventor
Yoshiyuki Teraoka
Minoru Tobita
Tamotsu Ishii
Original Assignee
Sony Corporation
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 Sony Corporation filed Critical Sony Corporation
Publication of WO2004068487A1 publication Critical patent/WO2004068487A1/fr

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10595—Control of operating function
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10502—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed
    • G11B11/1053—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed to compensate for the magnetic domain drift or time shift
    • 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
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10502—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed
    • G11B11/10504—Recording
    • G11B11/1051—Recording by modulating both the magnetic field and the light beam at the transducers

Definitions

  • the pulse width of the recording pulse is switched according to the temperature of the recording medium and / or the vicinity thereof.
  • the pulse width is reduced at a high temperature to prevent the recording characteristics from deteriorating, and the pulse is reduced at a low temperature. It is possible to obtain a desired laser beam capable of increasing the width to raise the temperature of the recording medium to a certain temperature.
  • the control means reduces the pulse width as the temperature of the recording medium and / or the vicinity thereof increases, and increases the pulse width as the temperature of the recording medium and Z or the vicinity thereof decreases.
  • the pulse width can be switched stepwise, and a predetermined temperature range is set, and the pulse width is set to a small value within the range that does not exceed the peak power rating of the recording pulse as the optimum pulse width corresponding to this. can do.
  • the laser controller 5 controls the recording pulse width variably in advance at various different temperatures, measures the error rate and the required peak power at that time, and controls each temperature.
  • the LDC block is subjected to an interleaving process to form a block of 152 columns and 496 rows (Interleaved LDC Block), and as shown in FIG. 55 columns x 496 rows, A 2.5-byte frame sync code (Frame Sync) is added to the first position so that one line corresponds to one frame, and has a structure of 157.5 bytes X 496 frames.
  • Each row in FIG. 9 corresponds to 496 frames of Frame 10 to Frame 505 in the data overnight area in one recording block (cluster) shown in FIG. 15 described later.
  • the data-in-leave is a block-complete type. This results in a data redundancy of 20.50%.
  • a Viterbi decoding method using PR (1, 2, 1) ML is used as a data detection method.
  • a data block in units of 2,048 bytes supplied from the host application is defined as one logical data sector (Logical Data Sector; LDS).
  • LDS Logical Data Sector
  • a set of 32 recorded logical data sectors is referred to as a logical data cluster (Logical Data Cluster; LDC).
  • the laser power values as the reproduction laser power and the recording laser power are set in the register inside the laser driver / APC 249 by the drive controller 241. Further, in this example, the optimum pulse width is controlled together with the recording laser power based on the detected temperature near the disk 290.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

La présente invention a trait à un dispositif d'enregistrement de données comportant un moyen de commande pour la commutation d'une durée d'impulsions d'une impulsion d'enregistrement selon la température d'un support d'enregistrement et/ou proche de celle-ci. La durée d'impulsions est réduite selon la température dans la mesure où la puissance d'une diode laser ne dépasse pas sa valeur assignée. Notamment, la durée d'impulsions de l'impulsion d'enregistrement est réduite, évitant ainsi la détérioration des caractéristiques d'enregistrement lorsque la température est élevée et de sorte que la durée d'impulsions est accrue afin d'obtenir une puissance de crête de la diode laser égale ou inférieure à la valeur assignée maximale lorsque la température est basse.
PCT/JP2004/000601 2003-01-31 2004-01-23 Dispositif d'enregistrement de donnees, procede et programme d'enregistrement de donnees WO2004068487A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003-025233 2003-01-31
JP2003025233A JP2004265463A (ja) 2003-01-31 2003-01-31 データ記録装置、データ記録方法及びプログラム

Publications (1)

Publication Number Publication Date
WO2004068487A1 true WO2004068487A1 (fr) 2004-08-12

Family

ID=32820788

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2004/000601 WO2004068487A1 (fr) 2003-01-31 2004-01-23 Dispositif d'enregistrement de donnees, procede et programme d'enregistrement de donnees

Country Status (2)

Country Link
JP (1) JP2004265463A (fr)
WO (1) WO2004068487A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02126447A (ja) * 1988-06-24 1990-05-15 Sony Corp 光磁気記録装置
JPH06131729A (ja) * 1992-10-14 1994-05-13 Ricoh Co Ltd 光磁気記録再生装置における磁界変調記録方法
JPH06150435A (ja) * 1992-11-04 1994-05-31 Sony Corp 光磁気ディスク装置のレーザパワー制御方法
JP2000285539A (ja) * 1999-03-29 2000-10-13 Sanyo Electric Co Ltd 光磁気ディスクへの信号記録又は再生装置、信号記録又は再生方法、及び光磁気記録媒体

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02126447A (ja) * 1988-06-24 1990-05-15 Sony Corp 光磁気記録装置
JPH06131729A (ja) * 1992-10-14 1994-05-13 Ricoh Co Ltd 光磁気記録再生装置における磁界変調記録方法
JPH06150435A (ja) * 1992-11-04 1994-05-31 Sony Corp 光磁気ディスク装置のレーザパワー制御方法
JP2000285539A (ja) * 1999-03-29 2000-10-13 Sanyo Electric Co Ltd 光磁気ディスクへの信号記録又は再生装置、信号記録又は再生方法、及び光磁気記録媒体

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JP2004265463A (ja) 2004-09-24

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