JPS57193158A - Transmission system - Google Patents

Transmission system

Info

Publication number
JPS57193158A
JPS57193158A JP56077797A JP7779781A JPS57193158A JP S57193158 A JPS57193158 A JP S57193158A JP 56077797 A JP56077797 A JP 56077797A JP 7779781 A JP7779781 A JP 7779781A JP S57193158 A JPS57193158 A JP S57193158A
Authority
JP
Japan
Prior art keywords
bit
frame
spare
words
spare bit
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.)
Granted
Application number
JP56077797A
Other languages
Japanese (ja)
Other versions
JPS641988B2 (en
Inventor
Masakazu Mori
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP56077797A priority Critical patent/JPS57193158A/en
Publication of JPS57193158A publication Critical patent/JPS57193158A/en
Publication of JPS641988B2 publication Critical patent/JPS641988B2/ja
Granted legal-status Critical Current

Links

Classifications

    • 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

Landscapes

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

Abstract

PURPOSE:To transmit a spare bit without disturbing a BSI characteristic given to a mB-nB code, by suitably selecting a word interval inserting a frame bit or the spare bit, in the transmission system of the mB-nB code system. CONSTITUTION:At the transmission section, an original signal (a) is made for the mB-nB conversion by dividing the signal into words W0, W1-Wp-1, Wp+1- W2p-1 in each m-bit, but no mB-nB conversion is made for specific words of a constant interval, W0, Wp, W2p-, and a frame bit or a spare bit (x) is simply added to the original signal for transmission. At the reception side, a frame synchronizing is taken through the frame bit to separate the spare bit (x). Further, for the words W1-Wp-1, Wp+1- not including the frame bit or the spare bit (x), the mB-nB inversion is made to restore the original signal and for the words W0, Wp, W2p- including the frame bit or the spare bit (x), the remaining bits after separation of the frame bit or the spare bit are picked up as they are without the mB-nB inversion.
JP56077797A 1981-05-22 1981-05-22 Transmission system Granted JPS57193158A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56077797A JPS57193158A (en) 1981-05-22 1981-05-22 Transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56077797A JPS57193158A (en) 1981-05-22 1981-05-22 Transmission system

Publications (2)

Publication Number Publication Date
JPS57193158A true JPS57193158A (en) 1982-11-27
JPS641988B2 JPS641988B2 (en) 1989-01-13

Family

ID=13643982

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56077797A Granted JPS57193158A (en) 1981-05-22 1981-05-22 Transmission system

Country Status (1)

Country Link
JP (1) JPS57193158A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60167550A (en) * 1984-02-09 1985-08-30 Nec Corp Code converter
JPH0239740A (en) * 1988-07-29 1990-02-08 Fujitsu Ltd Bsi light transmitting system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5468617A (en) * 1977-11-11 1979-06-01 Mitsubishi Electric Corp Signal recorder-reproducer

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5468617A (en) * 1977-11-11 1979-06-01 Mitsubishi Electric Corp Signal recorder-reproducer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60167550A (en) * 1984-02-09 1985-08-30 Nec Corp Code converter
JPH0239740A (en) * 1988-07-29 1990-02-08 Fujitsu Ltd Bsi light transmitting system

Also Published As

Publication number Publication date
JPS641988B2 (en) 1989-01-13

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