FR2428874A1 - METHOD AND DEVICE FOR RECORDING INFORMATION ON A MEDIUM, PARTICULARLY MAGNETIC, INDEPENDENT OF THE SPEED OF THE MEDIUM - Google Patents

METHOD AND DEVICE FOR RECORDING INFORMATION ON A MEDIUM, PARTICULARLY MAGNETIC, INDEPENDENT OF THE SPEED OF THE MEDIUM

Info

Publication number
FR2428874A1
FR2428874A1 FR7817640A FR7817640A FR2428874A1 FR 2428874 A1 FR2428874 A1 FR 2428874A1 FR 7817640 A FR7817640 A FR 7817640A FR 7817640 A FR7817640 A FR 7817640A FR 2428874 A1 FR2428874 A1 FR 2428874A1
Authority
FR
France
Prior art keywords
medium
speed
recording information
independent
information
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.)
Granted
Application number
FR7817640A
Other languages
French (fr)
Other versions
FR2428874B1 (en
Inventor
Jean-Pierre Lazzari
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.)
Bull SA
Original Assignee
Bull SA
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 Bull SA filed Critical Bull SA
Priority to FR7817640A priority Critical patent/FR2428874A1/en
Priority to GB7915854A priority patent/GB2026287B/en
Priority to JP6229779A priority patent/JPS54163016A/en
Priority to DE19792923973 priority patent/DE2923973A1/en
Priority to IT23519/79A priority patent/IT1121283B/en
Publication of FR2428874A1 publication Critical patent/FR2428874A1/en
Application granted granted Critical
Publication of FR2428874B1 publication Critical patent/FR2428874B1/fr
Granted 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
    • G11B20/1407—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
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K1/00—Methods or arrangements for marking the record carrier in digital fashion
    • G06K1/12—Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching
    • G06K1/125—Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching by magnetic means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/01—Details
    • G06K7/016—Synchronisation of sensing process
    • G06K7/0166—Synchronisation of sensing process by means of clock-signals derived from the code marks, e.g. self-clocking code

Abstract

L'invention a pour objet un procédé d'enregistrement d'informations sur un support. Pour s'affranchir des fluctuations de vitesse du support on détecte l'instant où le dernier signal écrit sur le support parvient à une distance du transducteur d'écriture égale à l'intervalle souhaité entre les signaux compte tenu de l'information à enregistrer, et c'est à cet instant qu'on écrit le nouveau signal. Application à l'enregistrement d'informations sur support magnétique, notamment pour chèques, cartes de crédit, cartes de controle.The subject of the invention is a method for recording information on a medium. To overcome fluctuations in the speed of the medium, the instant when the last signal written on the medium arrives at a distance from the write transducer equal to the desired interval between the signals, taking into account the information to be recorded, is detected, and it is at this moment that the new signal is written. Application to the recording of information on magnetic medium, in particular for checks, credit cards, control cards.

FR7817640A 1978-06-13 1978-06-13 METHOD AND DEVICE FOR RECORDING INFORMATION ON A MEDIUM, PARTICULARLY MAGNETIC, INDEPENDENT OF THE SPEED OF THE MEDIUM Granted FR2428874A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
FR7817640A FR2428874A1 (en) 1978-06-13 1978-06-13 METHOD AND DEVICE FOR RECORDING INFORMATION ON A MEDIUM, PARTICULARLY MAGNETIC, INDEPENDENT OF THE SPEED OF THE MEDIUM
GB7915854A GB2026287B (en) 1978-06-13 1979-05-08 Method and apparatus for recording data on a carrier in particular a magnetic carrier irrespective of the speed of the carrier
JP6229779A JPS54163016A (en) 1978-06-13 1979-05-22 Method of recording data on carrier and device for executing same method
DE19792923973 DE2923973A1 (en) 1978-06-13 1979-06-13 METHOD AND DEVICE FOR RECORDING INFORMATION ON A CARRIER, IN PARTICULAR MAGNETIC CARRIER, INDEPENDENT FROM THE SPEED OF THE CARRIER
IT23519/79A IT1121283B (en) 1978-06-13 1979-06-13 PROCEDURE AND DEVICE FOR THE REGISTRATION OF INFORMATION ON A SUPPORT, IN PARTICULAR MAGNETIC, INDEPENDENTLY FROM THE SPEED OF THE SUPPORT

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7817640A FR2428874A1 (en) 1978-06-13 1978-06-13 METHOD AND DEVICE FOR RECORDING INFORMATION ON A MEDIUM, PARTICULARLY MAGNETIC, INDEPENDENT OF THE SPEED OF THE MEDIUM

Publications (2)

Publication Number Publication Date
FR2428874A1 true FR2428874A1 (en) 1980-01-11
FR2428874B1 FR2428874B1 (en) 1980-10-10

Family

ID=9209434

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7817640A Granted FR2428874A1 (en) 1978-06-13 1978-06-13 METHOD AND DEVICE FOR RECORDING INFORMATION ON A MEDIUM, PARTICULARLY MAGNETIC, INDEPENDENT OF THE SPEED OF THE MEDIUM

Country Status (5)

Country Link
JP (1) JPS54163016A (en)
DE (1) DE2923973A1 (en)
FR (1) FR2428874A1 (en)
GB (1) GB2026287B (en)
IT (1) IT1121283B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2535884A1 (en) * 1982-11-09 1984-05-11 Nixdorf Computer Ag METHOD AND DEVICE FOR CONTINUOUSLY RECORDING PREDETERMINED LENGTH INFORMATION SIGNALS ON A MAGNETIC TRACK
WO1997030412A1 (en) * 1996-02-15 1997-08-21 Dh Technology, Inc. Method and apparatus for performing spatial read-modify-write operations

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4394621A (en) * 1980-12-08 1983-07-19 International Business Machines Corporation Electronic velocity measurement especially for self-clocking write head

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2076658A5 (en) * 1970-01-22 1971-10-15 Automatisme Cie Gle
FR2076309A5 (en) * 1970-01-09 1971-10-15 Compteurs Comp D

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2076309A5 (en) * 1970-01-09 1971-10-15 Compteurs Comp D
FR2076658A5 (en) * 1970-01-22 1971-10-15 Automatisme Cie Gle

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2535884A1 (en) * 1982-11-09 1984-05-11 Nixdorf Computer Ag METHOD AND DEVICE FOR CONTINUOUSLY RECORDING PREDETERMINED LENGTH INFORMATION SIGNALS ON A MAGNETIC TRACK
WO1997030412A1 (en) * 1996-02-15 1997-08-21 Dh Technology, Inc. Method and apparatus for performing spatial read-modify-write operations
US5780828A (en) * 1996-02-15 1998-07-14 Dh Technology, Inc. Interactive video systems

Also Published As

Publication number Publication date
IT7923519A0 (en) 1979-06-13
DE2923973A1 (en) 1980-01-03
FR2428874B1 (en) 1980-10-10
GB2026287A (en) 1980-01-30
IT1121283B (en) 1986-04-02
JPS54163016A (en) 1979-12-25
GB2026287B (en) 1982-10-13

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