NL7502329A - Pulse code modulation transmission system - transmits as pattern of eve number of polarity changes to facilitate error checking - Google Patents

Pulse code modulation transmission system - transmits as pattern of eve number of polarity changes to facilitate error checking

Info

Publication number
NL7502329A
NL7502329A NL7502329A NL7502329A NL7502329A NL 7502329 A NL7502329 A NL 7502329A NL 7502329 A NL7502329 A NL 7502329A NL 7502329 A NL7502329 A NL 7502329A NL 7502329 A NL7502329 A NL 7502329A
Authority
NL
Netherlands
Prior art keywords
word
bipolar
pattern
transmission system
transmits
Prior art date
Application number
NL7502329A
Other languages
Dutch (nl)
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
Priority to NL7502329A priority Critical patent/NL7502329A/en
Publication of NL7502329A publication Critical patent/NL7502329A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/24—Testing correct operation
    • H04L1/245—Testing correct operation by using the properties of transmission 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
    • H04L25/4917—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 multilevel codes
    • H04L25/4923—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 multilevel codes using ternary codes
    • H04L25/4925—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 multilevel codes using ternary codes using balanced bipolar ternary codes

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Dc Digital Transmission (AREA)

Abstract

PCM transmission system is for transmission in bipolar form of a signal of bit-words of n bits, in which each word containing less than n/2 single bits is inverted before conversion. Each n-bit word is converted to a bipolar (n-m) digit word, the value of the m-bits being determined in the bipolar word as a pattern of an even number of polarity changes per bipolar word. The disparity per bipolar word is zero, so that the disparity can be used as an error check. In particular, (8+2) bits envelopes may be transmitted as 8 digit bipolar words with low redundancy.
NL7502329A 1975-02-27 1975-02-27 Pulse code modulation transmission system - transmits as pattern of eve number of polarity changes to facilitate error checking NL7502329A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7502329A NL7502329A (en) 1975-02-27 1975-02-27 Pulse code modulation transmission system - transmits as pattern of eve number of polarity changes to facilitate error checking

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7502329A NL7502329A (en) 1975-02-27 1975-02-27 Pulse code modulation transmission system - transmits as pattern of eve number of polarity changes to facilitate error checking

Publications (1)

Publication Number Publication Date
NL7502329A true NL7502329A (en) 1976-08-31

Family

ID=19823265

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7502329A NL7502329A (en) 1975-02-27 1975-02-27 Pulse code modulation transmission system - transmits as pattern of eve number of polarity changes to facilitate error checking

Country Status (1)

Country Link
NL (1) NL7502329A (en)

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Legal Events

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