IT7923519A0 - Procedimento e dispositivo per la registrazione d'informazioni su un supporto, in particolare magnetico, indipendentemente dalla velocita'del supporto. - Google Patents

Procedimento e dispositivo per la registrazione d'informazioni su un supporto, in particolare magnetico, indipendentemente dalla velocita'del supporto.

Info

Publication number
IT7923519A0
IT7923519A0 IT7923519A IT2351979A IT7923519A0 IT 7923519 A0 IT7923519 A0 IT 7923519A0 IT 7923519 A IT7923519 A IT 7923519A IT 2351979 A IT2351979 A IT 2351979A IT 7923519 A0 IT7923519 A0 IT 7923519A0
Authority
IT
Italy
Prior art keywords
support
regardless
procedure
speed
recording information
Prior art date
Application number
IT7923519A
Other languages
English (en)
Other versions
IT1121283B (it
Original Assignee
Cii Honeywell Bull
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 Cii Honeywell Bull filed Critical Cii Honeywell Bull
Publication of IT7923519A0 publication Critical patent/IT7923519A0/it
Application granted granted Critical
Publication of IT1121283B publication Critical patent/IT1121283B/it

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Signal Processing (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Digital Magnetic Recording (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
IT23519/79A 1978-06-13 1979-06-13 Procedimento e dispositivo per la registrazione d'informazioni su un supporto,in particolare magnetico,indipendentemente dalla velocita'del supporto IT1121283B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7817640A FR2428874A1 (fr) 1978-06-13 1978-06-13 Procede et dispositif d'enregistrement d'informations sur un support, notamment magnetique, independamment de la vitesse du support

Publications (2)

Publication Number Publication Date
IT7923519A0 true IT7923519A0 (it) 1979-06-13
IT1121283B IT1121283B (it) 1986-04-02

Family

ID=9209434

Family Applications (1)

Application Number Title Priority Date Filing Date
IT23519/79A IT1121283B (it) 1978-06-13 1979-06-13 Procedimento e dispositivo per la registrazione d'informazioni su un supporto,in particolare magnetico,indipendentemente dalla velocita'del supporto

Country Status (5)

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

Families Citing this family (3)

* 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
DE3241400A1 (de) * 1982-11-09 1984-05-10 Nixdorf Computer Ag, 4790 Paderborn Verfahren und einrichtung zur fortlaufenden aufzeichnung von informationssignalen vorbestimmter laenge auf eine magnetspeicherspur
US5780828A (en) * 1996-02-15 1998-07-14 Dh Technology, Inc. Interactive video systems

Family Cites Families (2)

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

Also Published As

Publication number Publication date
FR2428874B1 (it) 1980-10-10
JPS54163016A (en) 1979-12-25
GB2026287A (en) 1980-01-30
IT1121283B (it) 1986-04-02
FR2428874A1 (fr) 1980-01-11
GB2026287B (en) 1982-10-13
DE2923973A1 (de) 1980-01-03

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