FR1436443A - Appareil d'enregistrement magnétique - Google Patents

Appareil d'enregistrement magnétique

Info

Publication number
FR1436443A
FR1436443A FR20029A FR20029A FR1436443A FR 1436443 A FR1436443 A FR 1436443A FR 20029 A FR20029 A FR 20029A FR 20029 A FR20029 A FR 20029A FR 1436443 A FR1436443 A FR 1436443A
Authority
FR
France
Prior art keywords
magnetic recording
recording device
magnetic
recording
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
FR20029A
Other languages
English (en)
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.)
Ampex Corp
Original Assignee
Ampex Corp
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 Ampex Corp filed Critical Ampex Corp
Application granted granted Critical
Publication of FR1436443A publication Critical patent/FR1436443A/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
    • 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
    • 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
    • G11B20/1415—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 conversion to or from pulse frequency coding

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Digital Magnetic Recording (AREA)
FR20029A 1964-07-02 1965-06-09 Appareil d'enregistrement magnétique Expired FR1436443A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US379893A US3391400A (en) 1964-07-02 1964-07-02 Magnetic recorder and reproduce system utilizing a clock signal

Publications (1)

Publication Number Publication Date
FR1436443A true FR1436443A (fr) 1966-04-22

Family

ID=23499141

Family Applications (1)

Application Number Title Priority Date Filing Date
FR20029A Expired FR1436443A (fr) 1964-07-02 1965-06-09 Appareil d'enregistrement magnétique

Country Status (5)

Country Link
US (1) US3391400A (fr)
DE (1) DE1474283A1 (fr)
FR (1) FR1436443A (fr)
GB (1) GB1086225A (fr)
NL (1) NL6506499A (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3493962A (en) * 1966-08-30 1970-02-03 Rca Corp Converter for self-clocking digital signals
US3599156A (en) * 1968-02-06 1971-08-10 Schlumberger Technology Corp Methods and apparatus for transmitting data between remote locations
US3691543A (en) * 1971-02-08 1972-09-12 Ibm Positioning system including servo track configuration and associated demodulator
US3792443A (en) * 1972-04-14 1974-02-12 Honeywell Inc Recording and playback system for self-clocking digital signals
US4635140A (en) * 1982-05-08 1987-01-06 Victor Company Of Japan, Limited Digital recording/playback system with limited frequency range

Also Published As

Publication number Publication date
NL6506499A (fr) 1966-01-03
DE1474283A1 (de) 1969-07-17
US3391400A (en) 1968-07-02
GB1086225A (en) 1967-10-04

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