GB1603963A - Digital signal recording system - Google Patents

Digital signal recording system Download PDF

Info

Publication number
GB1603963A
GB1603963A GB18343/78A GB1834378A GB1603963A GB 1603963 A GB1603963 A GB 1603963A GB 18343/78 A GB18343/78 A GB 18343/78A GB 1834378 A GB1834378 A GB 1834378A GB 1603963 A GB1603963 A GB 1603963A
Authority
GB
United Kingdom
Prior art keywords
circuit
pulses
signal
binary data
output
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
GB18343/78A
Other languages
English (en)
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.)
Fujitsu General Ltd
Aerojet Rocketdyne Holdings Inc
Original Assignee
General Corp
Gencorp 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 General Corp, Gencorp Inc filed Critical General Corp
Publication of GB1603963A publication Critical patent/GB1603963A/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
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/0007—Circuits or methods for reducing noise, for correction of distortion, or for changing density of recorded information
    • 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)
  • Dc Digital Transmission (AREA)
GB18343/78A 1977-05-07 1978-05-08 Digital signal recording system Expired GB1603963A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52052354A JPS5821322B2 (ja) 1977-05-07 1977-05-07 デジタル信号の変調方法

Publications (1)

Publication Number Publication Date
GB1603963A true GB1603963A (en) 1981-12-02

Family

ID=12912464

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18343/78A Expired GB1603963A (en) 1977-05-07 1978-05-08 Digital signal recording system

Country Status (4)

Country Link
US (1) US4198663A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5821322B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE2820041A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1603963A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4459623A (en) * 1982-01-18 1984-07-10 Mds Qantel Corporation Method and apparatus for recovering NRZ information from MFM data
JPS5990448A (ja) * 1982-11-16 1984-05-24 Toshiba Corp 復調方式
DE3376037D1 (en) * 1982-12-27 1988-04-21 Telefunken Fernseh & Rundfunk Apparatus for reproducing a digital signal recorded with several heads
JPH0621421U (ja) * 1992-06-30 1994-03-22 クロスター産業株式会社 手提付きバック
JP3011475U (ja) * 1994-11-22 1995-05-30 東海化成品販売株式会社 自動車上に搭載する専用ケース
AU2003237028A1 (en) * 2002-06-25 2004-01-06 Koninklijke Philips Electronics N.V. Operation of a discharge lamp
EP2434648A1 (de) * 2010-09-25 2012-03-28 ATLAS Elektronik GmbH Codierer und Decodierer, Codierverfahren und Decodierverfahren sowie System aus Codierer und Decodierer

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3381086A (en) * 1962-08-16 1968-04-30 Minnesota Mining & Mfg Reproduction of television signals from photographic disc recordings
US3418585A (en) * 1965-12-28 1968-12-24 Ibm Circuit for detecting the presence of a special character in phase-encoded binary data
US3636536A (en) * 1968-03-21 1972-01-18 Leach Corp Derived clock circuit in a phase modulated digital data handling system
US3855426A (en) * 1971-03-11 1974-12-17 Philips Corp Video disc recording and optical playback system therefor
US3842194A (en) * 1971-03-22 1974-10-15 Rca Corp Information records and recording/playback systems therefor
US3815122A (en) * 1973-01-02 1974-06-04 Gte Information Syst Inc Data converting apparatus
US4027335A (en) * 1976-03-19 1977-05-31 Ampex Corporation DC free encoding for data transmission system

Also Published As

Publication number Publication date
US4198663A (en) 1980-04-15
JPS53137103A (en) 1978-11-30
JPS5821322B2 (ja) 1983-04-28
DE2820041A1 (de) 1978-11-16
DE2820041C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1989-01-12

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19960508