JPS55147048A - Emergency radio broadcast system - Google Patents

Emergency radio broadcast system

Info

Publication number
JPS55147048A
JPS55147048A JP5538779A JP5538779A JPS55147048A JP S55147048 A JPS55147048 A JP S55147048A JP 5538779 A JP5538779 A JP 5538779A JP 5538779 A JP5538779 A JP 5538779A JP S55147048 A JPS55147048 A JP S55147048A
Authority
JP
Japan
Prior art keywords
emergency broadcast
signal
broadcast
switch
emergency
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
JP5538779A
Other languages
Japanese (ja)
Inventor
Yosaji Kobayashi
Yoshitaka Kato
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.)
NIPPON TV HOUSOUMOU KK
Nippon Television Network Corp
Original Assignee
NIPPON TV HOUSOUMOU KK
Nippon Television Network Corp
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 NIPPON TV HOUSOUMOU KK, Nippon Television Network Corp filed Critical NIPPON TV HOUSOUMOU KK
Priority to JP5538779A priority Critical patent/JPS55147048A/en
Publication of JPS55147048A publication Critical patent/JPS55147048A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
    • H04H20/59—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for emergency or urgency

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

PURPOSE:To apply the switch automatically at the reception side and to enable to receive emergency broadcast, by the broadcast of the emergency broadcast identifying signal representing the emergency broadcast at the start of emergency radio broadcast together with the emergency broadcast signal. CONSTITUTION:The band pass filter 26 and the mixing circuit 25 are connected between the terminals t1 and t2 at the program signal 10. On the other hand, the oscillator 23 transmitting the emergency broadcast identifying signal 11 grounded via the switches 21, 22 and the oscillator 24 transmitting the emergency broadcast end signal 12 are connected to the circuit 25. The switches 21, 22 are closed normally and grounded, but before a given time at the start of emergency broadcast, the switch 21 is open and the switch 22 is open after the end. The filter 26 eliminates the frequency of the signals 11, 12 in the signal 10 and the signals 11, 12 are superimposed on the circuit 25 without adverse effect. At the reception side, the signals 11, 12 are detected with separation, the switch of the receiver is automatically closed with this detection, enabling to receive the emergency broadcast at an arbitrary time easily.
JP5538779A 1979-05-04 1979-05-04 Emergency radio broadcast system Pending JPS55147048A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5538779A JPS55147048A (en) 1979-05-04 1979-05-04 Emergency radio broadcast system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5538779A JPS55147048A (en) 1979-05-04 1979-05-04 Emergency radio broadcast system

Publications (1)

Publication Number Publication Date
JPS55147048A true JPS55147048A (en) 1980-11-15

Family

ID=12997087

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5538779A Pending JPS55147048A (en) 1979-05-04 1979-05-04 Emergency radio broadcast system

Country Status (1)

Country Link
JP (1) JPS55147048A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4476488A (en) * 1983-03-23 1984-10-09 Zenith Electronics Corporation Control circuit for CATV alert system
US4575750A (en) * 1984-05-31 1986-03-11 Marty Callahan Communications apparatus for use with cable television systems

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4917884A (en) * 1972-06-07 1974-02-16
JPS49129402A (en) * 1973-04-10 1974-12-11

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4917884A (en) * 1972-06-07 1974-02-16
JPS49129402A (en) * 1973-04-10 1974-12-11

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4476488A (en) * 1983-03-23 1984-10-09 Zenith Electronics Corporation Control circuit for CATV alert system
US4575750A (en) * 1984-05-31 1986-03-11 Marty Callahan Communications apparatus for use with cable television systems

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