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BR0001668A - Aparelho e processo para reproduzir dados tratando um meio de gravação óptico-magnético - Google Patents

Aparelho e processo para reproduzir dados tratando um meio de gravação óptico-magnético

Info

Publication number
BR0001668A
BR0001668A BR0001668-3A BR0001668A BR0001668A BR 0001668 A BR0001668 A BR 0001668A BR 0001668 A BR0001668 A BR 0001668A BR 0001668 A BR0001668 A BR 0001668A
Authority
BR
Brazil
Prior art keywords
layer
displacement
magnetic wall
recording medium
memory layer
Prior art date
Application number
BR0001668-3A
Other languages
English (en)
Inventor
Shunji Yoshimura
Atsushi Fukumoto
Shinichi Kai
Original Assignee
Sony Corp
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 Corp filed Critical Sony Corp
Publication of BR0001668A publication Critical patent/BR0001668A/pt

Links

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
    • G11B11/10502—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
    • G11B11/10515—Reproducing
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Radio Relay Systems (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Traffic Control Systems (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)

Abstract

"APARELHO E PROCESSO PARA REPRODUZIR DADOS TRATANDO UM MEIO DE GRAVAçãO óPTICO-MAGNéTICO" Aparelho para reprodução de dados do tipo DWDD que trata um meio de gravação óptico-magnético tendo uma película de três camadas magnéticas consistindo em pelo menos uma camada de deslocamento, uma camada de comutação e uma camada de memória. Um deslocamento de parede magnética na camada de deslocamento é gerado em qualquer região onde a temperatura da película magnética torna-se mais alta que a temperatura de Curie da camada de comutação, de forma que o domínio magnético efetivamente gravado é dimensionalmente ampliado. Um sinal reproduzido é primeiramente equalizado com relação à sua forma de onda em um circuito equalizador e a seguir é alimentado a um circuito de detecção de deslocamento de parede magnética. Neste circuito de detecção, um sinal de detecção representando a geração de um deslocamento de parede magnética é produzido utilizando um sinal diferencial ou um sinal diferencial secundário do sinal reproduzido sem ser nocivamente afetado por qualquer brusca variação em nível de CC causada no sinal reproduzido. Subseq³entemente um circuito de detecção de dados detecta os dados pelo uso do dito sinal de detecção e a seguir emite os dados reproduzidos. Neste aparelho, os dados podem ser reproduzidos a uma taxa de erros de bit suficientemente baixa a despeito da ocorrência de qualquer brusca variação em nível de CC causada no sinal reproduzido.
BR0001668-3A 1999-04-20 2000-04-20 Aparelho e processo para reproduzir dados tratando um meio de gravação óptico-magnético BR0001668A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11112840A JP2000306281A (ja) 1999-04-20 1999-04-20 データ再生装置および方法

Publications (1)

Publication Number Publication Date
BR0001668A true BR0001668A (pt) 2000-10-31

Family

ID=14596856

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0001668-3A BR0001668A (pt) 1999-04-20 2000-04-20 Aparelho e processo para reproduzir dados tratando um meio de gravação óptico-magnético

Country Status (15)

Country Link
US (1) US6421304B1 (pt)
EP (1) EP1047058B1 (pt)
JP (1) JP2000306281A (pt)
KR (1) KR100706732B1 (pt)
CN (1) CN1197069C (pt)
AT (1) ATE292319T1 (pt)
AU (1) AU759808B2 (pt)
BR (1) BR0001668A (pt)
CA (1) CA2306048A1 (pt)
DE (1) DE60019014T2 (pt)
ID (1) ID25681A (pt)
MX (1) MXPA00003789A (pt)
MY (1) MY124045A (pt)
SG (1) SG98380A1 (pt)
TW (1) TW509894B (pt)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002184055A (ja) * 2000-12-08 2002-06-28 Sony Corp 位相エラー検出装置及び方法、レーザパワー制御装置及び方法、並びに光磁気記録再生装置
JP2002208193A (ja) * 2001-01-09 2002-07-26 Canon Inc 光磁気記録媒体およびその情報再生方法
JP4350312B2 (ja) * 2001-01-12 2009-10-21 キヤノン株式会社 磁壁移動型光磁気記録媒体および情報再生方法
JP2003303456A (ja) * 2002-04-09 2003-10-24 Canon Inc 光磁気記録媒体、および、その製造方法
WO2006052046A1 (en) * 2004-11-10 2006-05-18 Electronics And Telecommunications Research Institute Apparatus and method for classifying e-mail using decision tree
CN102592597B (zh) 2011-01-17 2014-08-13 鸿富锦精密工业（深圳）有限公司 电子装置及音频数据的版权保护方法
TWI427502B (zh) * 2011-01-21 2014-02-21 Hon Hai Prec Ind Co Ltd 電子裝置及音頻資料的版權保護方法
US11031053B2 (en) 2019-10-08 2021-06-08 SK Hynix Inc. Derivative receiver
KR102639325B1 (ko) 2019-10-08 2024-02-21 에스케이하이닉스 주식회사 미분 수신기 및 신호 수신 방법

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3666057B2 (ja) * 1995-06-07 2005-06-29 ソニー株式会社 光磁気記録再生方法およびこれに用いる光磁気記録媒体
JP3049482B2 (ja) * 1995-06-09 2000-06-05 富士通株式会社 光磁気記録媒体及びその再生方法
JPH10149595A (ja) * 1996-09-18 1998-06-02 Canon Inc 磁壁を移動させて情報の再生を行う情報再生装置
JPH1092045A (ja) * 1996-09-18 1998-04-10 Canon Inc 信号再生装置
JPH1092046A (ja) * 1996-09-19 1998-04-10 Canon Inc 光磁気情報再生装置
JPH10334534A (ja) * 1997-05-28 1998-12-18 Canon Inc 光磁気記録再生方法及び光磁気記録再生装置
JPH1131343A (ja) * 1997-07-08 1999-02-02 Canon Inc 光磁気記録再生方法及び光磁気記録再生装置と光磁気記録方法
JPH1196609A (ja) * 1997-09-18 1999-04-09 Canon Inc 光磁気情報再生装置

Also Published As

Publication number Publication date
EP1047058A2 (en) 2000-10-25
DE60019014D1 (de) 2005-05-04
KR20000071732A (ko) 2000-11-25
EP1047058A3 (en) 2001-12-05
AU2769700A (en) 2000-10-26
AU759808B2 (en) 2003-05-01
SG98380A1 (en) 2003-09-19
MY124045A (en) 2006-06-30
ATE292319T1 (de) 2005-04-15
ID25681A (id) 2000-10-26
EP1047058B1 (en) 2005-03-30
DE60019014T2 (de) 2006-04-27
KR100706732B1 (ko) 2007-04-13
JP2000306281A (ja) 2000-11-02
CA2306048A1 (en) 2000-10-20
MXPA00003789A (es) 2002-03-08
TW509894B (en) 2002-11-11
US6421304B1 (en) 2002-07-16
CN1271162A (zh) 2000-10-25
CN1197069C (zh) 2005-04-13

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Legal Events

Date Code Title Description
B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A 11A ANUIDADE(S).

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 2103 DE 26/04/2011.