JPS579155A - Signal trnsmission system - Google Patents

Signal trnsmission system

Info

Publication number
JPS579155A
JPS579155A JP8271280A JP8271280A JPS579155A JP S579155 A JPS579155 A JP S579155A JP 8271280 A JP8271280 A JP 8271280A JP 8271280 A JP8271280 A JP 8271280A JP S579155 A JPS579155 A JP S579155A
Authority
JP
Japan
Prior art keywords
signal
circuit
carrier
switcher
trnsmission
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
JP8271280A
Other languages
Japanese (ja)
Inventor
Koichiro Akima
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP8271280A priority Critical patent/JPS579155A/en
Publication of JPS579155A publication Critical patent/JPS579155A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/24—Half-wave signalling systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Facsimiles In General (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

PURPOSE:To prevent the deterioration in S/N, by transmitting two types of signals through 180 deg. different phase of carrier. CONSTITUTION:A carrier A is applied to a switcher 12 and a phase inversion circuit 13. A control circuit 14 is switched every two-changes of video signal level for the carriers A, B for output, in a time band transmitting the video signal. In the time band when the control signal is transmitted, the circuit 14 supplies a signal outputting the carrier A to the switcher 12. With this state, a switcher 18 supplies a control signal D to a modulation circuit 15 with the signal supplied from the circuit 14. In the circuit 15, the carrier A is modulated with the signal D and transmitted to a transmission line 19 as the signal E.
JP8271280A 1980-06-20 1980-06-20 Signal trnsmission system Pending JPS579155A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8271280A JPS579155A (en) 1980-06-20 1980-06-20 Signal trnsmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8271280A JPS579155A (en) 1980-06-20 1980-06-20 Signal trnsmission system

Publications (1)

Publication Number Publication Date
JPS579155A true JPS579155A (en) 1982-01-18

Family

ID=13782012

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8271280A Pending JPS579155A (en) 1980-06-20 1980-06-20 Signal trnsmission system

Country Status (1)

Country Link
JP (1) JPS579155A (en)

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