GB929336A - A.c. telegraph system using a limited frequency band - Google Patents

A.c. telegraph system using a limited frequency band

Info

Publication number
GB929336A
GB929336A GB1294062A GB1294062A GB929336A GB 929336 A GB929336 A GB 929336A GB 1294062 A GB1294062 A GB 1294062A GB 1294062 A GB1294062 A GB 1294062A GB 929336 A GB929336 A GB 929336A
Authority
GB
United Kingdom
Prior art keywords
elements
unit code
april
character signal
triggers
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
GB1294062A
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
Publication of GB929336A publication Critical patent/GB929336A/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)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (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.
GB1294062A 1961-04-04 1962-04-04 A.c. telegraph system using a limited frequency band Expired GB929336A (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
GB929336A true GB929336A (en) 1963-06-19

Family

ID=19752961

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1294062A Expired GB929336A (en) 1961-04-04 1962-04-04 A.c. 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 (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
US5327127A (en) * 1989-06-30 1994-07-05 Inmos Limited Message encoding which utilizes control codes and data codes
US5422881A (en) * 1989-06-30 1995-06-06 Inmos Limited Message encoding
US5644569A (en) * 1993-06-11 1997-07-01 Sgs-Thomson Microelectronics Limited Transmission of messages
US5692021A (en) * 1993-06-11 1997-11-25 Sgs-Thomson Microelectronics Limited Encoding digital data
US5805087A (en) * 1993-06-11 1998-09-08 Stmicroelectronics, Ltd. Encoding scheme

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3713123A (en) * 1969-12-18 1973-01-23 Gen Electric High density data recording and error tolerant data reproducing system

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 (7)

* 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
US5327127A (en) * 1989-06-30 1994-07-05 Inmos Limited Message encoding which utilizes control codes and data codes
US5422881A (en) * 1989-06-30 1995-06-06 Inmos Limited Message encoding
US5422879A (en) * 1989-06-30 1995-06-06 Inmos Limited Data flow control mechanism utilizing low level flow control codes
US5644569A (en) * 1993-06-11 1997-07-01 Sgs-Thomson Microelectronics Limited Transmission of messages
US5692021A (en) * 1993-06-11 1997-11-25 Sgs-Thomson Microelectronics Limited Encoding digital data
US5805087A (en) * 1993-06-11 1998-09-08 Stmicroelectronics, Ltd. Encoding scheme

Also Published As

Publication number Publication date
DE1206947B (en) 1965-12-16
FR1319527A (en) 1963-03-01
BE615464A (en) 1962-07-16
NL121716C (en) 1967-02-08
CH394282A (en) 1965-06-30
NL263171A (en) 1964-05-25

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