AR247456A1 - Aparato reproductor de informacion digitalmente codificada grabada sobre un portador de grabacion discoidal opticamente legible - Google Patents
Aparato reproductor de informacion digitalmente codificada grabada sobre un portador de grabacion discoidal opticamente legibleInfo
- Publication number
- AR247456A1 AR247456A1 AR80283845A AR28384580A AR247456A1 AR 247456 A1 AR247456 A1 AR 247456A1 AR 80283845 A AR80283845 A AR 80283845A AR 28384580 A AR28384580 A AR 28384580A AR 247456 A1 AR247456 A1 AR 247456A1
- Authority
- AR
- Argentina
- Prior art keywords
- signal
- filter
- detector
- bit
- recorded
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 abstract 1
- 230000001850 reproductive effect Effects 0.000 abstract 1
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
APARATO REPRODUCTOR DE INFORMACION DIGITALMENTE CODIFICADA, QUE HA SIDO GRABADA SOBRE UN PORTADOR DE GRABACION DISCOIDAL EN LA FORMA DE AREAS DE INFORMACION OPTICAMENTE DETECTABLES DISPUESTAS DEACUERDO CON UN TRAZADO DE PISTAS CONCENTRICAS O EN ESPIRAL, SIENDO DICHAS AREAS UNITARIAS, COMPRENDIENDO DICHO APARATO UNA FUENTE LUMINOSA, UN CONJUNTO OPTICO PROYECTOR DE UN HAZ LUMINOSO SOBRE EL TRAZADO DE PISTAS, UN DETECTOR DE LA PRESENCIA DE UN AREA UNITARIA EN DICHO HAZ, UN CIRCUITO LECTOR REPRODUCTOR DE LA SENAL DIGITALMENTE CODIFICADA GRABADA, Y UN DISPOSITIVO GENERADOR DE UNA SENAL DE TEMPORIZACION EL CUAL COMPRENDE UN FILTRO PASABANDA QUE TIENE UNA FRECUENCIA CENTRAL IGUAL AL DOBLE DE LA FRECUENCIA DE BIT DE LA SENAL GRABADA, PARA FILTRAR LA SENAL DETECTADA POR EL DETECTOR DE BIT DE LA SENAL GRABASA, PARA FILTRAR LA SENAL DETECTADA POR EL DETECTOR A FIN DE OBTENER UNA SENAL DE TEMPORIZACION, CUMPLIENDO DICHA FRECUENCIA DE BIT F LA CONDICION F=V/2L, EN QUE V ES LA VELOCIDAD TANGENC IAL NOMINAL DEL PORTADOR DE GRABACION EN LA UBICACION DE LECTURA Y L LA DISTANCIA CENTRO A CENTRO MINIMA NOMINAL DE LAS AREAS UNITARIAS EN LA UBICACION DE LECTURA.
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 (1)
Publication Number | Publication Date |
---|---|
AR247456A1 true AR247456A1 (es) | 1994-12-29 |
Family
ID=19834645
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AR80283845A AR247456A1 (es) | 1980-01-09 | 1980-12-30 | Aparato reproductor de informacion digitalmente codificada grabada sobre un portador de grabacion discoidal opticamente legible |
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) | ES498335A0 (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) | SE8100031L (es) |
SG (1) | SG22284G (es) |
ZA (1) | ZA807747B (es) |
Families Citing this family (17)
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 |
EP0054438B1 (en) * | 1980-12-17 | 1985-11-06 | 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 |
US6680898B2 (en) | 2001-02-21 | 2004-01-20 | Todd J. Kuchman | Optical disc and method of protecting same |
US6842409B2 (en) * | 2001-02-21 | 2005-01-11 | Scratch-Less Disc Industries, Llc | Optical disc and method of protecting same |
Family Cites Families (4)
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. |
-
1980
- 1980-01-09 NL NL8000124A patent/NL8000124A/nl not_active Application Discontinuation
- 1980-03-24 US US06/132,743 patent/US4326282A/en not_active Expired - Lifetime
- 1980-12-10 ZA ZA00807747A patent/ZA807747B/xx unknown
- 1980-12-30 AR AR80283845A patent/AR247456A1/es active
-
1981
- 1981-01-05 ES ES498335A patent/ES498335A0/es active Granted
- 1981-01-05 MX MX185469A patent/MX149419A/es unknown
- 1981-01-05 GB GB8100126A patent/GB2067819B/en not_active Expired
- 1981-01-06 DK DK3581A patent/DK3581A/da not_active Application Discontinuation
- 1981-01-06 AU AU65992/81A patent/AU534548B2/en not_active Ceased
- 1981-01-06 IT IT19023/81A patent/IT1134951B/it active
- 1981-01-06 DD DD81226850A patent/DD157229A5/de unknown
- 1981-01-06 BR BR8100045A patent/BR8100045A/pt unknown
- 1981-01-06 JP JP19281A patent/JPS56101653A/ja active Pending
- 1981-01-07 CA CA000368013A patent/CA1163367A/en not_active Expired
- 1981-01-07 SE SE8100031D patent/SE8100031L/xx not_active Application Discontinuation
- 1981-01-07 SE SE8100031A patent/SE447769B/sv not_active IP Right Cessation
- 1981-01-07 BE BE0/203424A patent/BE886994A/fr not_active IP Right Cessation
- 1981-01-07 FR FR8100150A patent/FR2473771B1/fr not_active Expired
- 1981-01-08 DE DE19813100328 patent/DE3100328A1/de not_active Withdrawn
- 1981-01-09 AT AT0005981A patent/AT370546B/de not_active IP Right Cessation
-
1984
- 1984-03-12 SG SG222/84A patent/SG22284G/en unknown
-
1985
- 1985-05-23 HK HK405/85A patent/HK40585A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
IT1134951B (it) | 1986-08-20 |
ATA5981A (de) | 1982-08-15 |
GB2067819B (en) | 1983-12-21 |
AU6599281A (en) | 1981-07-16 |
FR2473771A1 (fr) | 1981-07-17 |
JPS56101653A (en) | 1981-08-14 |
IT8119023A0 (it) | 1981-01-06 |
AT370546B (de) | 1983-04-11 |
US4326282A (en) | 1982-04-20 |
BR8100045A (pt) | 1981-07-21 |
NL8000124A (nl) | 1981-08-03 |
AU534548B2 (en) | 1984-02-02 |
ZA807747B (en) | 1982-07-28 |
ES8201336A1 (es) | 1981-12-01 |
SE8100031L (sv) | 1981-07-10 |
SE447769B (sv) | 1986-12-08 |
MX149419A (es) | 1983-11-03 |
GB2067819A (en) | 1981-07-30 |
BE886994A (fr) | 1981-07-07 |
FR2473771B1 (fr) | 1985-06-14 |
ES498335A0 (es) | 1981-12-01 |
DE3100328A1 (de) | 1981-12-17 |
DD157229A5 (de) | 1982-10-20 |
CA1163367A (en) | 1984-03-06 |
DK3581A (da) | 1981-07-10 |
SG22284G (en) | 1985-01-04 |
HK40585A (en) | 1985-05-31 |
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