FR1319527A - Alternating current telegraph system using a limited frequency band - Google Patents

Alternating current telegraph system using a limited frequency band

Info

Publication number
FR1319527A
FR1319527A FR892064A FR892064A FR1319527A FR 1319527 A FR1319527 A FR 1319527A FR 892064 A FR892064 A FR 892064A FR 892064 A FR892064 A FR 892064A FR 1319527 A FR1319527 A FR 1319527A
Authority
FR
France
Prior art keywords
elements
unit code
frequency band
alternating current
april
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
FR892064A
Other languages
French (fr)
Inventor
Hendrik Cornelis Anthon Duuren
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.)
Nederlanden Staat
Original Assignee
Nederlanden Staat
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 Nederlanden Staat filed Critical Nederlanden Staat
Application granted granted Critical
Publication of FR1319527A publication Critical patent/FR1319527A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M5/00—Conversion of the form of the representation of individual digits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/47—Error detection, forward error correction or error protection, not provided for in groups H03M13/01 - H03M13/37
    • H03M13/51—Constant weight codes; n-out-of-m codes; Berger codes
    • 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
    • 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
    • H04L25/4906—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 binary codes
    • 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
    • H04L25/4906—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 binary codes
    • H04L25/4908—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 binary codes using mBnB codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Probability & Statistics with Applications (AREA)
  • Television Systems (AREA)
  • Dc Digital Transmission (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)

Abstract

929,336. Error detecting telegraph systems. DE STAAT DER NEDERLANDEN, TEN DEZE VERTEGENWOORDIGD DOOR DE DIRECTEUR-GENERAAL DER POSTERIJEN, TELEGRAFIE EN TELEFONIE. April 4, 1962 [April 4, 1961], No. 12940/62. Drawings to Specification. Class 40 (3). The invention provides a means for translating a 5-unit code to an 8-unit code, the 8-unit code being such that no character signal contains more than three consecutive elements having the same polarity and so that there can be no more than three consecutive elements of similar polarity in any sequence of elements. In the embodiment described, a tape transmitter feeds 5-unit signals to set five trigger circuits. Three further triggers are provided, these being set in accordance with the above requirements by means of a number of diode gates which are fed by the first five triggers. There is an additional feature that each character signal has four mark and four space elements, additional gates are necessary to ensure this. Specification 774,509 is referred to.
FR892064A 1961-04-04 1962-03-23 Alternating current telegraph system using a limited frequency band Expired FR1319527A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL263171A NL121716C (en) 1961-04-04 1961-04-04

Publications (1)

Publication Number Publication Date
FR1319527A true FR1319527A (en) 1963-03-01

Family

ID=19752961

Family Applications (1)

Application Number Title Priority Date Filing Date
FR892064A Expired FR1319527A (en) 1961-04-04 1962-03-23 Alternating current telegraph system using a limited frequency band

Country Status (6)

Country Link
BE (1) BE615464A (en)
CH (1) CH394282A (en)
DE (1) DE1206947B (en)
FR (1) FR1319527A (en)
GB (1) GB929336A (en)
NL (1) NL121716C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2073999A5 (en) * 1969-12-18 1971-10-01 Gen Electric

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2469839A1 (en) * 1979-11-14 1981-05-22 Brossard Pierre ENCODER-DECODER FOR DIGITAL TRANSMISSION CHANNELS
US5422881A (en) * 1989-06-30 1995-06-06 Inmos Limited Message encoding
GB8915137D0 (en) * 1989-06-30 1989-08-23 Inmos Ltd Message routing
GB9312071D0 (en) * 1993-06-11 1993-07-28 Inmos Ltd Encoding scheme
GB9312136D0 (en) * 1993-06-11 1993-07-28 Inmos Ltd Transmission of messages
EP0629067B1 (en) * 1993-06-11 2003-01-22 STMicroelectronics Limited 4B6B Coding

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL250403A (en) * 1959-04-15

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2073999A5 (en) * 1969-12-18 1971-10-01 Gen Electric

Also Published As

Publication number Publication date
DE1206947B (en) 1965-12-16
NL263171A (en) 1964-05-25
NL121716C (en) 1967-02-08
GB929336A (en) 1963-06-19
CH394282A (en) 1965-06-30
BE615464A (en) 1962-07-16

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