FR2039312A1 - - Google Patents

Info

Publication number
FR2039312A1
FR2039312A1 FR7012251A FR7012251A FR2039312A1 FR 2039312 A1 FR2039312 A1 FR 2039312A1 FR 7012251 A FR7012251 A FR 7012251A FR 7012251 A FR7012251 A FR 7012251A FR 2039312 A1 FR2039312 A1 FR 2039312A1
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Withdrawn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
FR7012251A
Other languages
French (fr)
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of FR2039312A1 publication Critical patent/FR2039312A1/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Withdrawn legal-status Critical Current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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/06—DC level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
    • H04L25/061—DC level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing hard decisions only; arrangements for tracking or suppressing unwanted low frequency components, e.g. removal of DC offset
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4904—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using self-synchronising codes, e.g. split-phase codes

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Power Engineering (AREA)
  • Digital Magnetic Recording (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Dc Digital Transmission (AREA)
FR7012251A 1969-04-21 1970-04-03 Withdrawn FR2039312A1 (enrdf_load_stackoverflow)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US81782969A 1969-04-21 1969-04-21
US81776169A 1969-04-21 1969-04-21

Publications (1)

Publication Number Publication Date
FR2039312A1 true FR2039312A1 (enrdf_load_stackoverflow) 1971-01-15

Family

ID=27124201

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7012251A Withdrawn FR2039312A1 (enrdf_load_stackoverflow) 1969-04-21 1970-04-03

Country Status (3)

Country Link
JP (1) JPS4912645B1 (enrdf_load_stackoverflow)
DE (1) DE2017703C3 (enrdf_load_stackoverflow)
FR (1) FR2039312A1 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2420181A1 (fr) * 1978-03-15 1979-10-12 Japan Broadcasting Corp Appareil d'enregistrement et de reproduction magnetique numerique

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1489177A (en) * 1973-10-16 1977-10-19 Gen Electric Co Ltd Digital data signalling systems and apparatus therefor
US3898689A (en) * 1974-08-02 1975-08-05 Bell Telephone Labor Inc Code converter
FR2424601A1 (fr) * 1978-04-25 1979-11-23 Cii Honeywell Bull Procede d'asservissement du signal de lecture d'un support d'informations et dispositif pour le mettre en oeuvre
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
US4635140A (en) * 1982-05-08 1987-01-06 Victor Company Of Japan, Limited Digital recording/playback system with limited frequency range
AT404846B (de) * 1997-06-16 1999-03-25 Chemiefaser Lenzing Ag Zusammensetzung enthaltend feine feststoffteilchen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2420181A1 (fr) * 1978-03-15 1979-10-12 Japan Broadcasting Corp Appareil d'enregistrement et de reproduction magnetique numerique

Also Published As

Publication number Publication date
JPS4912645B1 (enrdf_load_stackoverflow) 1974-03-26
DE2017703B2 (enrdf_load_stackoverflow) 1978-04-13
DE2017703A1 (de) 1970-11-05
DE2017703C3 (de) 1978-12-07

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Legal Events

Date Code Title Description
ST Notification of lapse