FR1576635A - - Google Patents

Info

Publication number
FR1576635A
FR1576635A FR06009244A FR06009244A FR1576635A FR 1576635 A FR1576635 A FR 1576635A FR 06009244 A FR06009244 A FR 06009244A FR 06009244 A FR06009244 A FR 06009244A FR 1576635 A FR1576635 A FR 1576635A
Authority
FR
France
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
FR06009244A
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 filed Critical
Application granted granted Critical
Publication of FR1576635A publication Critical patent/FR1576635A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
FR06009244A 1967-07-17 1968-06-19 Expired FR1576635A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US65378467A 1967-07-17 1967-07-17

Publications (1)

Publication Number Publication Date
FR1576635A true FR1576635A (fr) 1969-08-01

Family

ID=24622296

Family Applications (1)

Application Number Title Priority Date Filing Date
FR06009244A Expired FR1576635A (fr) 1967-07-17 1968-06-19

Country Status (6)

Country Link
US (1) US3500385A (fr)
CH (1) CH500636A (fr)
FR (1) FR1576635A (fr)
GB (1) GB1165658A (fr)
NL (1) NL6808643A (fr)
SE (1) SE334645B (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3626395A (en) * 1970-05-06 1971-12-07 Burroughs Corp Dual clocking recording and reproducing system for magnetic data
US3697977A (en) * 1970-07-06 1972-10-10 Honeywell Inc Two phase encoder system for three frequency modulation
US3671960A (en) * 1970-07-06 1972-06-20 Honeywell Inc Four phase encoder system for three frequency modulation
US3678503A (en) * 1970-07-06 1972-07-18 Honeywell Inc Two phase encoder system for three frequency modulation
USRE28330E (en) * 1970-08-17 1975-02-04 Self-clocking five bit record-playback ststem
US3641525A (en) * 1970-08-17 1972-02-08 Ncr Co Self-clocking five bit record-playback system
US3725885A (en) * 1970-09-28 1973-04-03 Ibm Method and apparatus for amplitude sensing and data gating in a magnetic-storage device with digital interface
US3656149A (en) * 1970-11-23 1972-04-11 Honeywell Inf Systems Three frequency data separator
US3761906A (en) * 1971-01-08 1973-09-25 Cogar Corp Tape system
US3794987A (en) * 1972-11-01 1974-02-26 Burroughs Corp Mfm readout with assymetrical data window
FR2234708B1 (fr) * 1973-06-22 1976-09-17 Thomson Csf

Family Cites Families (5)

* 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
US3217183A (en) * 1963-01-04 1965-11-09 Ibm Binary data detection system
US3405391A (en) * 1964-12-21 1968-10-08 Ibm Double frequency detection system
US3374475A (en) * 1965-05-24 1968-03-19 Potter Instrument Co Inc High density recording system
US3414894A (en) * 1965-06-29 1968-12-03 Rca Corp Magnetic recording and reproducing of digital information

Also Published As

Publication number Publication date
SE334645B (fr) 1971-05-03
US3500385A (en) 1970-03-10
CH500636A (de) 1970-12-15
DE1774505A1 (de) 1972-03-23
GB1165658A (en) 1969-10-01
NL6808643A (fr) 1969-01-21
DE1774505B2 (de) 1975-11-27

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Legal Events

Date Code Title Description
ST Notification of lapse