FR2004461A1 - - Google Patents

Info

Publication number
FR2004461A1
FR2004461A1 FR6908452A FR6908452A FR2004461A1 FR 2004461 A1 FR2004461 A1 FR 2004461A1 FR 6908452 A FR6908452 A FR 6908452A FR 6908452 A FR6908452 A FR 6908452A FR 2004461 A1 FR2004461 A1 FR 2004461A1
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.)
Withdrawn
Application number
FR6908452A
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.)
Leach Corp
Original Assignee
Leach 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 Leach Corp filed Critical Leach Corp
Publication of FR2004461A1 publication Critical patent/FR2004461A1/fr
Withdrawn legal-status Critical Current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)
FR6908452A 1968-03-21 1969-03-21 Withdrawn FR2004461A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US71509868A 1968-03-21 1968-03-21

Publications (1)

Publication Number Publication Date
FR2004461A1 true FR2004461A1 (fr) 1969-11-21

Family

ID=24872665

Family Applications (1)

Application Number Title Priority Date Filing Date
FR6908452A Withdrawn FR2004461A1 (fr) 1968-03-21 1969-03-21

Country Status (6)

Country Link
US (1) US3636536A (fr)
BE (1) BE730283A (fr)
DE (1) DE1913622C3 (fr)
FR (1) FR2004461A1 (fr)
GB (1) GB1265712A (fr)
NL (1) NL6903907A (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3725861A (en) * 1971-11-10 1973-04-03 Ibm Apparatus and method for establishing exact record reorientation after error condition in a data storage subsystem
US3727202A (en) * 1972-01-10 1973-04-10 Telex Computer Products Application of an automatic pulse width controlled, monostable multivibrator for detecting phase encoded information on magnetic tape
US3792443A (en) * 1972-04-14 1974-02-12 Honeywell Inc Recording and playback system for self-clocking digital signals
US3827078A (en) * 1972-11-01 1974-07-30 Burroughs Corp Digital data retrieval system with dynamic window skew
US3794987A (en) * 1972-11-01 1974-02-26 Burroughs Corp Mfm readout with assymetrical data window
JPS5821322B2 (ja) * 1977-05-07 1983-04-28 株式会社富士通ゼネラル デジタル信号の変調方法
JPS5834002B2 (ja) * 1979-10-17 1983-07-23 日立電子株式会社 デイジタル信号の磁気記録再生方式
US4417286A (en) * 1981-07-31 1983-11-22 Ncr Corporation Data window expander circuit in a data recovery system
US6429986B1 (en) 1995-09-07 2002-08-06 International Business Machines Corporation Data storage to enhance timing recovery in high density magnetic recording

Also Published As

Publication number Publication date
GB1265712A (fr) 1972-03-08
DE1913622C3 (de) 1979-09-20
BE730283A (fr) 1969-09-01
DE1913622B2 (de) 1979-01-18
NL6903907A (fr) 1969-09-23
US3636536A (en) 1972-01-18
DE1913622A1 (de) 1969-10-09

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Legal Events

Date Code Title Description
ST Notification of lapse