CH483690A - Dispositif d'enregistrement magnétique - Google Patents

Dispositif d'enregistrement magnétique

Info

Publication number
CH483690A
CH483690A CH1951668A CH1951668A CH483690A CH 483690 A CH483690 A CH 483690A CH 1951668 A CH1951668 A CH 1951668A CH 1951668 A CH1951668 A CH 1951668A CH 483690 A CH483690 A CH 483690A
Authority
CH
Switzerland
Prior art keywords
magnetic recording
recording device
magnetic
recording
Prior art date
Application number
CH1951668A
Other languages
English (en)
Inventor
Kimura Noboru
Emit Evans Pat
Original Assignee
Ncr Co
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 Ncr Co filed Critical Ncr Co
Publication of CH483690A publication Critical patent/CH483690A/fr

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Digital Magnetic Recording (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
CH1951668A 1968-01-04 1968-12-24 Dispositif d'enregistrement magnétique CH483690A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US69565268A 1968-01-04 1968-01-04

Publications (1)

Publication Number Publication Date
CH483690A true CH483690A (fr) 1969-12-31

Family

ID=24793917

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1951668A CH483690A (fr) 1968-01-04 1968-12-24 Dispositif d'enregistrement magnétique

Country Status (9)

Country Link
US (1) US3518700A (fr)
AT (1) AT291638B (fr)
BE (1) BE726072A (fr)
CH (1) CH483690A (fr)
DE (1) DE1900099C3 (fr)
FR (1) FR1598014A (fr)
GB (1) GB1194450A (fr)
NL (1) NL6817968A (fr)
SE (1) SE335641B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3634855A (en) * 1969-05-05 1972-01-11 Wendell S Miller Self-clocking multilevel data coding system
US4201942A (en) * 1978-03-08 1980-05-06 Downer Edward W Data conversion system
US4951049A (en) * 1989-03-22 1990-08-21 Eastman Kodak Company Self clocking binary information encoder
US4954825A (en) * 1989-03-22 1990-09-04 Eastman Kodak Company Self clocking binary data encoding/decoding method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE626685A (fr) * 1962-01-11
US3423744A (en) * 1965-05-24 1969-01-21 Ncr Co Binary magnetic recording system

Also Published As

Publication number Publication date
FR1598014A (fr) 1970-06-29
DE1900099B2 (de) 1973-10-18
SE335641B (fr) 1971-06-01
AT291638B (de) 1971-07-26
NL6817968A (fr) 1969-07-08
DE1900099A1 (de) 1969-10-02
GB1194450A (en) 1970-06-10
US3518700A (en) 1970-06-30
DE1900099C3 (de) 1974-05-16
BE726072A (fr) 1969-05-29

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Legal Events

Date Code Title Description
PL Patent ceased