CA964366A - High density digital recording - Google Patents

High density digital recording

Info

Publication number
CA964366A
CA964366A CA143,476A CA143476A CA964366A CA 964366 A CA964366 A CA 964366A CA 143476 A CA143476 A CA 143476A CA 964366 A CA964366 A CA 964366A
Authority
CA
Canada
Prior art keywords
high density
digital recording
density digital
recording
digital
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
CA143,476A
Other languages
English (en)
Other versions
CA143476S (en
Inventor
Ivars P. Breikss
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.)
Honeywell Inc
Original Assignee
Honeywell Inc
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 Honeywell Inc filed Critical Honeywell Inc
Application granted granted Critical
Publication of CA964366A publication Critical patent/CA964366A/en
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)
CA143,476A 1971-07-02 1972-05-30 High density digital recording Expired CA964366A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15935671A 1971-07-02 1971-07-02

Publications (1)

Publication Number Publication Date
CA964366A true CA964366A (en) 1975-03-11

Family

ID=22572246

Family Applications (1)

Application Number Title Priority Date Filing Date
CA143,476A Expired CA964366A (en) 1971-07-02 1972-05-30 High density digital recording

Country Status (5)

Country Link
US (1) US3736581A (cs)
CA (1) CA964366A (cs)
DE (1) DE2231825A1 (cs)
FR (1) FR2144720A1 (cs)
GB (1) GB1371830A (cs)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3810231A (en) * 1973-01-02 1974-05-07 Honeywell Inf Systems Noise record processing for phase encoded data
US3810233A (en) * 1973-03-09 1974-05-07 Honeywell Inf Systems Apparatus to detect phase encoded data being read from a data storage subsystem
US4008488A (en) * 1975-08-25 1977-02-15 Braemar Computer Devices, Inc. Magnetic recording data decoding system
US4012786A (en) * 1976-02-05 1977-03-15 Trw Inc. Magnetic data decoder
US4157573A (en) * 1977-07-22 1979-06-05 The Singer Company Digital data encoding and reconstruction circuit
US4297729A (en) * 1977-11-24 1981-10-27 Emi Limited Encoding and decoding of digital recordings
US4260952A (en) * 1979-07-17 1981-04-07 Teletype Corporation Circuit for decoding a diphase signal
US4422111A (en) * 1979-09-04 1983-12-20 Minnesota Mining And Manufacturing Company High capacity data cartridge system and preformatted cartridge for use therein
JPS57124954A (en) * 1981-01-26 1982-08-04 Victor Co Of Japan Ltd Data playback circuit
JPS5977605A (ja) * 1982-10-26 1984-05-04 Sansui Electric Co 読取りクロツク生成方式
US4586091A (en) * 1984-05-03 1986-04-29 Kalhas Oracle, Inc. System and method for high density data recording
US5805632A (en) * 1992-11-19 1998-09-08 Cirrus Logic, Inc. Bit rate doubler for serial data transmission or storage

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2972735A (en) * 1955-05-04 1961-02-21 Lab For Electronics Inc Data processing
US3508228A (en) * 1967-03-28 1970-04-21 Gen Electric Digital coding scheme providing indicium at cell boundaries under prescribed circumstances to facilitate self-clocking
US3537084A (en) * 1967-08-14 1970-10-27 Burroughs Corp Data storage timing system with means to compensate for data shift
US3623074A (en) * 1969-06-27 1971-11-23 Ibm Digital data recovery by wavelength interpretation

Also Published As

Publication number Publication date
FR2144720A1 (cs) 1973-02-16
GB1371830A (en) 1974-10-30
DE2231825A1 (de) 1973-01-18
US3736581A (en) 1973-05-29

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