IT953684B - Sistema digitale di registrazione e demodulazione a memoria magne tica - Google Patents

Sistema digitale di registrazione e demodulazione a memoria magne tica

Info

Publication number
IT953684B
IT953684B IT23340/72A IT2334072A IT953684B IT 953684 B IT953684 B IT 953684B IT 23340/72 A IT23340/72 A IT 23340/72A IT 2334072 A IT2334072 A IT 2334072A IT 953684 B IT953684 B IT 953684B
Authority
IT
Italy
Prior art keywords
digital recording
demodulation system
magne tic
memory
tic memory
Prior art date
Application number
IT23340/72A
Other languages
English (en)
Italian (it)
Original Assignee
Singer 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 Singer Co filed Critical Singer Co
Application granted granted Critical
Publication of IT953684B publication Critical patent/IT953684B/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
    • 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
    • G11B20/1423—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
IT23340/72A 1971-04-30 1972-04-19 Sistema digitale di registrazione e demodulazione a memoria magne tica IT953684B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13911071A 1971-04-30 1971-04-30

Publications (1)

Publication Number Publication Date
IT953684B true IT953684B (it) 1973-08-10

Family

ID=22485177

Family Applications (1)

Application Number Title Priority Date Filing Date
IT23340/72A IT953684B (it) 1971-04-30 1972-04-19 Sistema digitale di registrazione e demodulazione a memoria magne tica

Country Status (6)

Country Link
US (1) US3699556A (OSRAM)
CA (1) CA954623A (OSRAM)
DE (1) DE2211244A1 (OSRAM)
FR (1) FR2134708A1 (OSRAM)
GB (1) GB1338993A (OSRAM)
IT (1) IT953684B (OSRAM)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4234898A (en) * 1978-03-15 1980-11-18 Nippon Hoso Kyokai Digital magnetic recording and reproducing apparatus
US4394695A (en) * 1981-02-02 1983-07-19 Sharp Corporation Method and apparatus for evaluating recording systems

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB954942A (en) * 1961-02-01 1964-04-08 Potter Instrument Co Inc Improvements in or relating to high density recording systems
US3164815A (en) * 1962-06-29 1965-01-05 Ibm Digital data detection circuitry
US3271750A (en) * 1962-12-13 1966-09-06 Ibm Binary data detecting system
US3323115A (en) * 1964-08-31 1967-05-30 Anelex Corp Reproducing system for phase modulated magnetically recorded data
US3518648A (en) * 1966-11-07 1970-06-30 Subscription Television Inc High density record and reproduce system
US3603942A (en) * 1969-01-13 1971-09-07 Ibm Predifferentiated recording

Also Published As

Publication number Publication date
US3699556A (en) 1972-10-17
DE2211244A1 (de) 1972-11-09
CA954623A (en) 1974-09-10
FR2134708A1 (OSRAM) 1972-12-08
GB1338993A (en) 1973-11-28

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