ES8201336A1 - Aparato para reproducir informacion digitalmente codificada - Google Patents

Aparato para reproducir informacion digitalmente codificada

Info

Publication number
ES8201336A1
ES8201336A1 ES498335A ES498335A ES8201336A1 ES 8201336 A1 ES8201336 A1 ES 8201336A1 ES 498335 A ES498335 A ES 498335A ES 498335 A ES498335 A ES 498335A ES 8201336 A1 ES8201336 A1 ES 8201336A1
Authority
ES
Spain
Prior art keywords
record carrier
coded information
information recorded
digitally coded
frequency
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
ES498335A
Other languages
English (en)
Other versions
ES498335A0 (es
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of ES498335A0 publication Critical patent/ES498335A0/es
Publication of ES8201336A1 publication Critical patent/ES8201336A1/es
Expired legal-status Critical Current

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
    • 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
    • G11B20/1423—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code
    • 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
    • G11B20/1407—Digital recording or reproducing using self-clocking codes characterised by the use of two levels code representation depending on a single bit, i.e. where a one is always represented by a first code symbol while a zero is always represented by a second code symbol
    • G11B20/1419—Digital recording or reproducing using self-clocking codes characterised by the use of two levels code representation depending on a single bit, i.e. where a one is always represented by a first code symbol while a zero is always represented by a second code symbol to or from biphase level coding, i.e. to or from codes where a one is coded as a transition from a high to a low level during the middle of a bit cell and a zero is encoded as a transition from a low to a high level during the middle of a bit cell or vice versa, e.g. split phase code, Manchester code conversion to or from biphase space or mark coding, i.e. to or from codes where there is a transition at the beginning of every bit cell and a one has no second transition and a zero has a second transition one half of a bit period later or vice versa, e.g. double frequency code, FM code
    • 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

Landscapes

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

Abstract

DISPOSITIVO PARA REPRODUCIR INFORMACION DIGITALMENTE CODIFICADA, QUE HA SIDO REGISTRADA EN UN DISCO EN ZONAS DE INFORMACION OPTICAMENTE DETECTABLE. EL DISPOSITIVO COMPRENDE UN LASER (16) QUE, MEDIANTE UN ESPEJO (17) Y UN OBJETIVO (18), PROYECTA UN HAZ (19) SOBRE LA PISTA (4) DEL DISCO PORTADOR DEL REGISTRO. LA SEÑAL REFLEJADA POR EL HAZ (19), DE FRECUENCIA 2FO, SIENDO FO LA FRECUENCIA DE LA SEÑAL REGISTRADA, LA RECOGE EL DETECTOR (20) Y LA REPRODUCE EL CIRCUITO DE LECTURA (23). LA SINCRONIZACION DEL CIRCUITO DE LECTURA (23) SE REALIZA POR MEDIO DE UNA SEÑAL DETECTADA A TRAVES DE UN FILTRO PASABANDA (21) Y UN BUCLE (22).
ES498335A 1980-01-09 1981-01-05 Aparato para reproducir informacion digitalmente codificada Expired ES8201336A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8000124A NL8000124A (nl) 1980-01-09 1980-01-09 Inrichting voor het weergeven van digitaal gecodeerde informatie die op een optisch uitleesbare schijfvormige registratiedrager is aangebracht.

Publications (2)

Publication Number Publication Date
ES498335A0 ES498335A0 (es) 1981-12-01
ES8201336A1 true ES8201336A1 (es) 1981-12-01

Family

ID=19834645

Family Applications (1)

Application Number Title Priority Date Filing Date
ES498335A Expired ES8201336A1 (es) 1980-01-09 1981-01-05 Aparato para reproducir informacion digitalmente codificada

Country Status (21)

Country Link
US (1) US4326282A (es)
JP (1) JPS56101653A (es)
AR (1) AR247456A1 (es)
AT (1) AT370546B (es)
AU (1) AU534548B2 (es)
BE (1) BE886994A (es)
BR (1) BR8100045A (es)
CA (1) CA1163367A (es)
DD (1) DD157229A5 (es)
DE (1) DE3100328A1 (es)
DK (1) DK3581A (es)
ES (1) ES8201336A1 (es)
FR (1) FR2473771B1 (es)
GB (1) GB2067819B (es)
HK (1) HK40585A (es)
IT (1) IT1134951B (es)
MX (1) MX149419A (es)
NL (1) NL8000124A (es)
SE (2) SE447769B (es)
SG (1) SG22284G (es)
ZA (1) ZA807747B (es)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8103117A (nl) * 1981-06-29 1983-01-17 Philips Nv Inrichting voor het beschrijven en/of uitlezen van een registratiedrager.
NL8003476A (nl) * 1980-06-16 1982-01-18 Philips Nv Werkwijze voor het coderen van databits op een regis- tratiedrager, inrichting voor het uitvoeren van de werkwijze, registratiedrager voorzien van een infor- matiestructuur en inrichting voor het decoderen van het van de registratiedrager uitgelezen signaal.
US4519064A (en) * 1980-10-27 1985-05-21 Nippon Columbia Kabushikikaisha Optical record disc
DE3172850D1 (en) * 1980-12-17 1985-12-12 Matsushita Electric Industrial Co Ltd Optical disk having an index mark
NL8100098A (nl) * 1981-01-12 1982-08-02 Philips Nv Registratiedrager met optisch uitleesbare informatiestruktuur.
USRE32937E (en) * 1982-03-19 1989-05-30 Magnetic Peripherals, Inc. Modulation system for optical recording
US4456981A (en) * 1982-03-19 1984-06-26 Magnetic Peripherals Inc. Modulation system for optical recording
EP0100995A3 (en) * 1982-08-10 1985-10-16 Kabushiki Kaisha Toshiba Optical disk
JPS59203244A (ja) * 1983-05-04 1984-11-17 Hitachi Ltd 光学的情報再生装置
US4802154A (en) * 1983-10-13 1989-01-31 Laser Magnetic Storage International Company High density codes for optical recording
JPS6067556U (ja) * 1983-10-14 1985-05-14 ヤマハ株式会社 クロツク再生回路
US4652926A (en) * 1984-04-23 1987-03-24 Massachusetts Institute Of Technology Solid state imaging technique
JPH07107744B2 (ja) * 1984-05-16 1995-11-15 松下電器産業株式会社 光ディスクの再生方法
US4617553A (en) * 1985-08-12 1986-10-14 Harris Corporation Enhanced Miller code
US5339301A (en) * 1986-10-06 1994-08-16 U.S. Philips Corporation Optically readable record carrier for recording information, method and apparatus for manufacturing such, apparatus for recording and reading information on a such a record carrier
US6842409B2 (en) * 2001-02-21 2005-01-11 Scratch-Less Disc Industries, Llc Optical disc and method of protecting same
US6680898B2 (en) * 2001-02-21 2004-01-20 Todd J. Kuchman Optical disc and method of protecting same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3501586A (en) * 1966-09-01 1970-03-17 Battelle Development Corp Analog to digital to optical photographic recording and playback system
GB1570799A (en) * 1977-01-28 1980-07-09 Jacobs E Binary coded digital optical record
NL187413C (nl) * 1978-03-16 1991-09-16 Philips Nv Registratiedragerlichaam, ingeschreven registratiedrager, werkwijze voor het inschrijven van het registratiedragerlichaam en inrichting voor het uitvoeren van de werkwijze en voor het uitlezen van een ingeschreven registratiedrager.
NL7811003A (nl) * 1978-11-06 1980-05-08 Philips Nv Schijfvormige, optisch uitleesbare registratiedrager, als opslagmedium voor data-informatie.

Also Published As

Publication number Publication date
JPS56101653A (en) 1981-08-14
ZA807747B (en) 1982-07-28
BE886994A (fr) 1981-07-07
DK3581A (da) 1981-07-10
ES498335A0 (es) 1981-12-01
IT1134951B (it) 1986-08-20
SE447769B (sv) 1986-12-08
ATA5981A (de) 1982-08-15
MX149419A (es) 1983-11-03
SG22284G (en) 1985-01-04
AR247456A1 (es) 1994-12-29
GB2067819B (en) 1983-12-21
AT370546B (de) 1983-04-11
FR2473771B1 (fr) 1985-06-14
HK40585A (en) 1985-05-31
IT8119023A0 (it) 1981-01-06
CA1163367A (en) 1984-03-06
NL8000124A (nl) 1981-08-03
AU534548B2 (en) 1984-02-02
FR2473771A1 (fr) 1981-07-17
DD157229A5 (de) 1982-10-20
AU6599281A (en) 1981-07-16
DE3100328A1 (de) 1981-12-17
BR8100045A (pt) 1981-07-21
GB2067819A (en) 1981-07-30
SE8100031L (sv) 1981-07-10
US4326282A (en) 1982-04-20

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