CA1103351A - Traduction non-disponible - Google Patents

Traduction non-disponible

Info

Publication number
CA1103351A
CA1103351A CA293,421A CA293421A CA1103351A CA 1103351 A CA1103351 A CA 1103351A CA 293421 A CA293421 A CA 293421A CA 1103351 A CA1103351 A CA 1103351A
Authority
CA
Canada
Prior art keywords
data
bit
spots
track
signal
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
CA293,421A
Other languages
English (en)
Inventor
Ray A. Walker
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of CA1103351A publication Critical patent/CA1103351A/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24085—Pits
    • 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
CA293,421A 1977-01-28 1977-12-19 Traduction non-disponible Expired CA1103351A (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US76356777A 1977-01-28 1977-01-28
US763,567 1977-01-28

Publications (1)

Publication Number Publication Date
CA1103351A true CA1103351A (fr) 1981-06-16

Family

ID=25068187

Family Applications (1)

Application Number Title Priority Date Filing Date
CA293,421A Expired CA1103351A (fr) 1977-01-28 1977-12-19 Traduction non-disponible

Country Status (6)

Country Link
JP (1) JPS5395603A (fr)
CA (1) CA1103351A (fr)
DE (1) DE2803603A1 (fr)
FR (1) FR2379129A1 (fr)
GB (1) GB1570799A (fr)
NL (1) NL7800613A (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7811003A (nl) * 1978-11-06 1980-05-08 Philips Nv Schijfvormige, optisch uitleesbare registratiedrager, als opslagmedium voor data-informatie.
NL8000121A (nl) * 1980-01-09 1981-08-03 Philips Nv Schijfvormige, optische uitleesbare registratiedrager als opslagmedium voor datainformatie, inrichting voor het vervaardigen van zo'n registratiedrager, inrichting voor het optekenen van datainformatie in zo'n registratiedrager en inrichting voor het uitlezen van zo'n registratiedrager.
NL8000122A (nl) * 1980-01-09 1981-08-03 Philips Nv Schijfvormige, optisch uitleesbare registratiedrager als opslagmedium voor datainformatie, inrichting voor het vervaardigen van zo'n registratiedrager, inrichting voor het optekenen en/of weergeven van datainformatie in c.q. van zo'n registratiedrager.
NL8000124A (nl) * 1980-01-09 1981-08-03 Philips Nv Inrichting voor het weergeven van digitaal gecodeerde informatie die op een optisch uitleesbare schijfvormige registratiedrager is aangebracht.
US5253244A (en) * 1980-07-16 1993-10-12 Discovision Associates System for recording digital information in a pulse-length modulation format
US5577015A (en) * 1980-07-16 1996-11-19 Discovision Associates System for recording digital information in a pulse-length modulation
US5553047A (en) * 1980-07-16 1996-09-03 Discovision Associates System for recording digital information in a pulse-length modulation format
US4532616A (en) * 1982-06-03 1985-07-30 News Log International, Inc. Method for optically encoding digital data on a substrate and the data record carrier formed thereby
DE10224372A1 (de) * 2002-05-24 2003-12-11 Jenoptik Automatisierungstech Verfahren zum Aufbringen und Auslesen von Informationen mittels Laser
DE102009039808A1 (de) 2009-07-06 2011-01-13 GM Global Technology Operations, Inc., Detroit Heckbodenanordnung und Rahmenstruktur einer selbsttragenden Fahrzeugkarosserie

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3108261A (en) * 1960-04-11 1963-10-22 Ampex Recording and/or reproducing system
FR1437760A (fr) * 1964-04-15 1966-05-06 Itek Corp Procédé et dispositif pour le traitement de données
US3365706A (en) * 1964-04-15 1968-01-23 Gilbert W. King Photo-optical data storage and retrieval system employing error detection and error location identification components
US3501586A (en) * 1966-09-01 1970-03-17 Battelle Development Corp Analog to digital to optical photographic recording and playback system
DE2132512A1 (de) * 1971-06-30 1973-02-15 Licentia Gmbh Einrichtung zum aufzeichnen von bits mittels eines strahles auf einen aufzeichnungstraeger
NL7413162A (nl) * 1974-10-07 1976-04-09 Philips Nv Inrichting voor het uitlezen van een schijf- vormige registratiedrager.

Also Published As

Publication number Publication date
DE2803603A1 (de) 1978-08-03
JPS5395603A (en) 1978-08-22
GB1570799A (en) 1980-07-09
NL7800613A (nl) 1978-08-01
FR2379129A1 (fr) 1978-08-25

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Legal Events

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