JPS55133158A - Pulse code communication system - Google Patents

Pulse code communication system

Info

Publication number
JPS55133158A
JPS55133158A JP4145079A JP4145079A JPS55133158A JP S55133158 A JPS55133158 A JP S55133158A JP 4145079 A JP4145079 A JP 4145079A JP 4145079 A JP4145079 A JP 4145079A JP S55133158 A JPS55133158 A JP S55133158A
Authority
JP
Japan
Prior art keywords
code
bit
serial
parallel
converted
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.)
Pending
Application number
JP4145079A
Other languages
Japanese (ja)
Inventor
Tomonori Okada
Koji Yoshimoto
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP4145079A priority Critical patent/JPS55133158A/en
Publication of JPS55133158A publication Critical patent/JPS55133158A/en
Pending 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
    • H04L25/4915—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 pattern inversion or substitution

Landscapes

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

Abstract

PURPOSE:To realize the system which minimizes the possibility of consecutive zeroes on the PCM code transmitted, by inverting the code of a part of bits of binary code. CONSTITUTION:The analog signal inputted to the analog signal input terminal 1 is converted into folded binary code in M bit at the analog digital conversion circuit 2. A part of codes among this M-bit codes is inverted at the code inversion unit 11, the parallel code in M bit is converted into serial code at the parallel serial converter 4 and transmitted on the transmission line 5. The serial code transmitted is converted into parallel code at the serial parallel conversion unit 6, it is inputted to the code inversion unit 12 and a part of bit code among M-bit codes is inverted to correspond to the code inversion unit 11. The folded binary code in M bit is reproduced into analog signal at the digital analog converter 8 and fed to the output terminal 9.
JP4145079A 1979-04-04 1979-04-04 Pulse code communication system Pending JPS55133158A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4145079A JPS55133158A (en) 1979-04-04 1979-04-04 Pulse code communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4145079A JPS55133158A (en) 1979-04-04 1979-04-04 Pulse code communication system

Publications (1)

Publication Number Publication Date
JPS55133158A true JPS55133158A (en) 1980-10-16

Family

ID=12608707

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4145079A Pending JPS55133158A (en) 1979-04-04 1979-04-04 Pulse code communication system

Country Status (1)

Country Link
JP (1) JPS55133158A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2107745A1 (en) 2008-03-31 2009-10-07 Linear Technology Corporation Method and system for bit polarization coding

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2107745A1 (en) 2008-03-31 2009-10-07 Linear Technology Corporation Method and system for bit polarization coding
US7656337B2 (en) 2008-03-31 2010-02-02 Linear Technology Corporation Method and system for bit polarization coding

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