JPS56140783A - Multiplex broadcast system - Google Patents

Multiplex broadcast system

Info

Publication number
JPS56140783A
JPS56140783A JP4423180A JP4423180A JPS56140783A JP S56140783 A JPS56140783 A JP S56140783A JP 4423180 A JP4423180 A JP 4423180A JP 4423180 A JP4423180 A JP 4423180A JP S56140783 A JPS56140783 A JP S56140783A
Authority
JP
Japan
Prior art keywords
adder
signal
modulator
modulation
output
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
JP4423180A
Other languages
Japanese (ja)
Inventor
Teruzo Kawamoto
Toshimitsu Fujimori
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP4423180A priority Critical patent/JPS56140783A/en
Publication of JPS56140783A publication Critical patent/JPS56140783A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To select and enjoy as much number of programs as possible at a specified station, by transmitting both the synthetic aural signal and the video signal produced through inserting two video signals alternately with every line or field. CONSTITUTION:The 1st and 2nd video signals are applied to the 1st and 2nd NAND gates 1 and 2, respectively. The output of the adder 5 is turned into the video signal in which the 1st and 2nd video signals are replaced alternately with every line or field. On the other hand, the 2nd aural signal that received a modulation by the FM modulator 6 is added with the 1st aural signal through an adder 7, and then an FM modulation is carried out by the modulator 8. The output of FM modulation is added with the synthetic video signal supplied from the adder 5 through the adder 9. The output of the adder 9 is modulated by the RF modulator 10 and then radiated through the transmission antenna 11. The transmitted signal is received at the reception side, and either one of the signals is selected for looking and listening.
JP4423180A 1980-04-03 1980-04-03 Multiplex broadcast system Pending JPS56140783A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4423180A JPS56140783A (en) 1980-04-03 1980-04-03 Multiplex broadcast system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4423180A JPS56140783A (en) 1980-04-03 1980-04-03 Multiplex broadcast system

Publications (1)

Publication Number Publication Date
JPS56140783A true JPS56140783A (en) 1981-11-04

Family

ID=12685753

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4423180A Pending JPS56140783A (en) 1980-04-03 1980-04-03 Multiplex broadcast system

Country Status (1)

Country Link
JP (1) JPS56140783A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5442398A (en) * 1992-07-06 1995-08-15 Kabushiki Kaisha Toshiba Method and apparatus for transmitting a video signal, and apparatus for receiving a video signal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5442398A (en) * 1992-07-06 1995-08-15 Kabushiki Kaisha Toshiba Method and apparatus for transmitting a video signal, and apparatus for receiving a video signal
US5504528A (en) * 1992-07-06 1996-04-02 Kabushiki Kaisha Toshiba Method and apparatus for transmitting a video signal, and apparatus for receiving a video signal

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