SE7704447L - Sett och anordning for lesning av data - Google Patents

Sett och anordning for lesning av data

Info

Publication number
SE7704447L
SE7704447L SE7704447A SE7704447A SE7704447L SE 7704447 L SE7704447 L SE 7704447L SE 7704447 A SE7704447 A SE 7704447A SE 7704447 A SE7704447 A SE 7704447A SE 7704447 L SE7704447 L SE 7704447L
Authority
SE
Sweden
Prior art keywords
reading data
reading
data
Prior art date
Application number
SE7704447A
Other languages
English (en)
Other versions
SE405179B (sv
Inventor
K Rozsa
Original Assignee
Datasaab Ab
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 Datasaab Ab filed Critical Datasaab Ab
Priority to SE7704447A priority Critical patent/SE405179B/sv
Priority to US05/897,517 priority patent/US4171479A/en
Priority to DE19782816708 priority patent/DE2816708A1/de
Publication of SE7704447L publication Critical patent/SE7704447L/sv
Publication of SE405179B publication Critical patent/SE405179B/sv

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)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
SE7704447A 1977-04-19 1977-04-19 Sett och anordning for lesning av data SE405179B (sv)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE7704447A SE405179B (sv) 1977-04-19 1977-04-19 Sett och anordning for lesning av data
US05/897,517 US4171479A (en) 1977-04-19 1978-04-18 Method and device for the reading of data
DE19782816708 DE2816708A1 (de) 1977-04-19 1978-04-18 Verfahren und vorrichtung zum lesen von daten

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7704447A SE405179B (sv) 1977-04-19 1977-04-19 Sett och anordning for lesning av data

Publications (2)

Publication Number Publication Date
SE7704447L true SE7704447L (sv) 1978-10-20
SE405179B SE405179B (sv) 1978-11-20

Family

ID=20331051

Family Applications (1)

Application Number Title Priority Date Filing Date
SE7704447A SE405179B (sv) 1977-04-19 1977-04-19 Sett och anordning for lesning av data

Country Status (3)

Country Link
US (1) US4171479A (sv)
DE (1) DE2816708A1 (sv)
SE (1) SE405179B (sv)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5864608A (ja) * 1981-10-15 1983-04-18 Victor Co Of Japan Ltd デイジタル信号記録再生方式
US4633333A (en) * 1985-06-24 1986-12-30 International Business Machines Corporation Detection of instantaneous speed variations in a tape drive
US4808884A (en) * 1985-12-02 1989-02-28 Western Digital Corporation High order digital phase-locked loop system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3676644A (en) * 1970-03-05 1972-07-11 Columbia Controls Research Cor Coded document and system for automatically reading same
US3676645A (en) * 1970-04-09 1972-07-11 William E Fickenscher Deep field optical label reader including means for certifying the validity of a label reading
JPS5085320A (sv) * 1973-11-27 1975-07-09
US3932731A (en) * 1974-08-02 1976-01-13 Bell Telephone Laboratories, Incorporated Code converter
US4012791A (en) * 1974-10-24 1977-03-15 Pertec Computer Corporation Disk drive apparatus
US3975769A (en) * 1975-02-07 1976-08-17 International Business Machines Corporation Storage device utilizing flexible magnetic disks

Also Published As

Publication number Publication date
US4171479A (en) 1979-10-16
SE405179B (sv) 1978-11-20
DE2816708A1 (de) 1978-10-26

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