MXPA04005360A - Aparato de evaluacion de disco. - Google Patents

Aparato de evaluacion de disco.

Info

Publication number
MXPA04005360A
MXPA04005360A MXPA04005360A MXPA04005360A MXPA04005360A MX PA04005360 A MXPA04005360 A MX PA04005360A MX PA04005360 A MXPA04005360 A MX PA04005360A MX PA04005360 A MXPA04005360 A MX PA04005360A MX PA04005360 A MXPA04005360 A MX PA04005360A
Authority
MX
Mexico
Prior art keywords
sample value
read
band
enhanced
value sequence
Prior art date
Application number
MXPA04005360A
Other languages
English (en)
Inventor
Shogo Miyanabe
Original Assignee
Pioneer 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 Pioneer Corp filed Critical Pioneer Corp
Publication of MXPA04005360A publication Critical patent/MXPA04005360A/es

Links

Classifications

    • 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
    • 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
    • G11B20/10037—A/D conversion, D/A conversion, sampling, slicing and digital quantisation or adjusting parameters thereof
    • 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
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • 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
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/36—Monitoring, i.e. supervising the progress of recording or reproducing
    • 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
    • G11B7/002—Recording, reproducing or erasing systems characterised by the shape or form of the carrier
    • G11B7/0037—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs
    • G11B7/00375—Recording, reproducing or erasing systems characterised by the shape or form of the carrier with discs arrangements for detection of physical defects, e.g. of recording layer
    • 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
    • G11B7/005—Reproducing
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

La invencion tiene como objetivo proporcionar un aparato de evaluacion de disco capaz de realizar una evaluacion de disco altamente confiable aun en un disco de grabacion en el que se graba una informacion en alta densidad. La secuencia de valores muestreados leidos de amplitud limitada se obtiene limitando la secuencia de valores muestreados leidos a un valor limite de amplitud predeterminada, la secuencia de valores muestreados leidos de amplitud limitada obtenida al muestrear una senal leida de salida del disco de grabacion sincronizada con una senal de reloj que tiene la misma frecuencia que la senal de reloj de canal. En donde una separacion entre un valor de muestreo maximo y un valor de muestreo minimo de la secuencia de valores muestreados leidos de amplitud limitada es equivalente a una distancia predeterminada de longitud de onda de alta frecuencia, el valor de muestreo maximo y el valor de muestreo minimo se incrementan, con lo que se obtiene una secuencia de valores muestreados leidos intensificados en alta frecuencia en al region de alta de la misma. La secuencia de valores muestreados leidos intensificados en alta frecuencia se convierten a una senal leida intensificada en alta frecuencia analogica sincronizada por la senal de reloj que tiene la misma frecuencia que la senal de reloj de canal. Solamente se extraen componentes que tengan frecuencias iguales o menores que una frecuencia de interrupcion predeterminada de la senal leida intensificada en alta frecuencia para obtener una senal leida de evaluacion. La senal leida de evaluacion se binariza con base en un valor de umbral predeterminado para obtener una senal binaria que se entrega como un valor de evaluacion de disco.
MXPA04005360A 2002-04-05 2003-04-01 Aparato de evaluacion de disco. MXPA04005360A (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002103524A JP3758158B2 (ja) 2002-04-05 2002-04-05 ディスク評価装置
PCT/JP2003/004178 WO2003085650A1 (fr) 2002-04-05 2003-04-01 Dispositif d'evaluation de disque

Publications (1)

Publication Number Publication Date
MXPA04005360A true MXPA04005360A (es) 2004-09-27

Family

ID=28786306

Family Applications (1)

Application Number Title Priority Date Filing Date
MXPA04005360A MXPA04005360A (es) 2002-04-05 2003-04-01 Aparato de evaluacion de disco.

Country Status (12)

Country Link
US (1) US7075875B2 (es)
EP (1) EP1494218A4 (es)
JP (1) JP3758158B2 (es)
KR (1) KR100666098B1 (es)
CN (1) CN1252694C (es)
AU (1) AU2003221130B2 (es)
BR (1) BR0307639A (es)
CA (1) CA2468980C (es)
MX (1) MXPA04005360A (es)
TW (1) TWI251209B (es)
WO (1) WO2003085650A1 (es)
ZA (1) ZA200403258B (es)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7308190B2 (en) * 2004-07-06 2007-12-11 Realtek Semiconductor Corp. Device for decoding disc read signal and method thereof
JP2006344294A (ja) 2005-06-09 2006-12-21 Hitachi Ltd 情報再生装置及び再生信号処理回路
CN101523494B (zh) * 2006-10-10 2011-09-28 皇家飞利浦电子股份有限公司 光学驱动器和用于预处理光盘读出信号的方法
US20090316557A1 (en) * 2006-10-31 2009-12-24 Yoshio Sasaki Information reproducing apparatus and method, and computer program
JP4915876B2 (ja) * 2006-10-31 2012-04-11 パイオニア株式会社 情報再生装置及び方法、並びにコンピュータプログラム
WO2008068856A1 (ja) * 2006-12-05 2008-06-12 Pioneer Corporation 情報再生装置及び方法、並びにコンピュータプログラム
WO2008068855A1 (ja) * 2006-12-05 2008-06-12 Pioneer Corporation 情報再生装置及び方法、並びにコンピュータプログラム
US8014252B2 (en) 2006-12-05 2011-09-06 Pioneer Corporation Information reproducing apparatus and method, and computer program
JP4861435B2 (ja) * 2006-12-05 2012-01-25 パイオニア株式会社 情報再生装置及び方法、並びにコンピュータプログラム
WO2008068857A1 (ja) * 2006-12-05 2008-06-12 Pioneer Corporation 情報再生装置及び方法、並びにコンピュータプログラム
WO2009016755A1 (ja) * 2007-08-01 2009-02-05 Pioneer Corporation 記録装置及び方法、コンピュータプログラム、並びに記録媒体
US8954010B2 (en) * 2011-07-11 2015-02-10 At&T Intellectual Property Ii, L.P. Spectrum management system for municipal spectrum using guided cognitive radio

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3437239B2 (ja) * 1994-02-16 2003-08-18 オリンパス光学工業株式会社 情報再生装置
JP3395880B2 (ja) * 1997-04-01 2003-04-14 横河電機株式会社 ジッタアナライザ
JP3459563B2 (ja) * 1998-03-06 2003-10-20 パイオニア株式会社 波形等化器および記録情報再生装置
SG81980A1 (en) * 1999-05-07 2001-07-24 Sony Prec Engineering Ct Singa Apparatus for measuring jitter in optical disc
JP2002008324A (ja) * 2000-06-23 2002-01-11 Hitachi Ltd 信号処理方法およびそれを用いた記録再生装置

Also Published As

Publication number Publication date
BR0307639A (pt) 2005-01-04
JP2003303474A (ja) 2003-10-24
CA2468980A1 (en) 2003-10-16
AU2003221130B2 (en) 2007-09-06
ZA200403258B (en) 2005-08-31
JP3758158B2 (ja) 2006-03-22
CA2468980C (en) 2009-10-27
CN1252694C (zh) 2006-04-19
US20040257953A1 (en) 2004-12-23
KR100666098B1 (ko) 2007-01-10
CN1596437A (zh) 2005-03-16
KR20040094449A (ko) 2004-11-09
EP1494218A1 (en) 2005-01-05
EP1494218A4 (en) 2007-12-12
TW200307912A (en) 2003-12-16
AU2003221130A1 (en) 2003-10-20
WO2003085650A1 (fr) 2003-10-16
TWI251209B (en) 2006-03-11
US7075875B2 (en) 2006-07-11

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