FR2199231B1 - - Google Patents

Info

Publication number
FR2199231B1
FR2199231B1 FR7328909A FR7328909A FR2199231B1 FR 2199231 B1 FR2199231 B1 FR 2199231B1 FR 7328909 A FR7328909 A FR 7328909A FR 7328909 A FR7328909 A FR 7328909A FR 2199231 B1 FR2199231 B1 FR 2199231B1
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.)
Expired
Application number
FR7328909A
Other languages
French (fr)
Other versions
FR2199231A1 (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.)
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 FR2199231A1 publication Critical patent/FR2199231A1/fr
Application granted granted Critical
Publication of FR2199231B1 publication Critical patent/FR2199231B1/fr
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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K9/00—Demodulating pulses which have been modulated with a continuously-variable signal
    • H03K9/06—Demodulating pulses which have been modulated with a continuously-variable signal of frequency- or rate-modulated pulses
    • 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
    • H04L25/4902—Pulse width modulation; Pulse position modulation
    • 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)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Manipulation Of Pulses (AREA)
  • Analogue/Digital Conversion (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
  • Dc Digital Transmission (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
FR7328909A 1972-09-07 1973-07-30 Expired FR2199231B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US28713272A 1972-09-07 1972-09-07

Publications (2)

Publication Number Publication Date
FR2199231A1 FR2199231A1 (en) 1974-04-05
FR2199231B1 true FR2199231B1 (en) 1976-05-07

Family

ID=23101591

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7328909A Expired FR2199231B1 (en) 1972-09-07 1973-07-30

Country Status (9)

Country Link
JP (1) JPS4966116A (en)
BE (1) BE804062A (en)
CA (1) CA1037570A (en)
CH (1) CH573691A5 (en)
FR (1) FR2199231B1 (en)
GB (1) GB1442444A (en)
IT (1) IT992697B (en)
NL (1) NL7311473A (en)
SE (1) SE392551B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5789769A (en) * 1980-11-26 1982-06-04 Nippon Denso Co Ltd Controller for copying machine group
CN114090482B (en) * 2021-09-28 2024-06-07 荣湃半导体（上海）有限公司 Delay counteracting method for transmission data

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3631422A (en) * 1969-02-03 1971-12-28 Ibm System for detection of data time interval measurement
US3711843A (en) * 1970-04-27 1973-01-16 Olivetti & Co Spa Self-adapting synchronization system for reading information from a moving support
US3708748A (en) * 1970-04-27 1973-01-02 Ibm Retrospective pulse modulation and apparatus therefor
US3720927A (en) * 1971-01-25 1973-03-13 Redactron Corp Speed insensitive reading and writing apparatus for digital information
FR2136906B1 (en) * 1971-05-07 1975-07-04 Automatisme Cie Gle
JPS4861122A (en) * 1971-12-02 1973-08-27

Also Published As

Publication number Publication date
GB1442444A (en) 1976-07-14
CA1037570A (en) 1978-08-29
FR2199231A1 (en) 1974-04-05
JPS4966116A (en) 1974-06-26
BE804062A (en) 1973-12-17
DE2343472B2 (en) 1975-08-21
NL7311473A (en) 1974-03-11
CH573691A5 (en) 1976-03-15
SE392551B (en) 1977-03-28
IT992697B (en) 1975-09-30
DE2343472A1 (en) 1974-03-28

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Legal Events

Date Code Title Description
ST Notification of lapse