JPS55132144A - Circuit selection system for television signal - Google Patents
Circuit selection system for television signalInfo
- Publication number
- JPS55132144A JPS55132144A JP3914879A JP3914879A JPS55132144A JP S55132144 A JPS55132144 A JP S55132144A JP 3914879 A JP3914879 A JP 3914879A JP 3914879 A JP3914879 A JP 3914879A JP S55132144 A JPS55132144 A JP S55132144A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- station
- signal
- television
- stand
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/74—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus
Abstract
PURPOSE:To attain simplification and economization by eliminating the need for the conventionally-needed remote control function by transmitting signal transmission circuit information of another television station via the same transmission line as a circuit switching signal. CONSTITUTION:With regard to main circuits 4(stand-by circuit), 5(in-use telephone circuit) and 6(in-use television circuit), signals are transmitted from transmitting station 1 to receiving station 2 via intermediate repeating station 3 and as for control line 33, they are sent in the opposite direction to main circuits. Then, a B station signal can be transmitted by using the in-use television circuit (In-use television circuit input is 24 and B station signal input is 25 with television stand-by operation input.) by closing in-use television circuit selective transmitting terminal switch 26 for another television station signal (b station signal) and in-use television circuit selective receiving terminal switch 30 for the signal. Further, repeating station 3, equipped with demodulator 10 and circuit selective switches 31 and 32 selecting the B station signal transmitted via the in-use television circuit or stand-by circuit, controls switches 31 and 32 to send a B station signal video output from output 40.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3914879A JPS55132144A (en) | 1979-03-30 | 1979-03-30 | Circuit selection system for television signal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3914879A JPS55132144A (en) | 1979-03-30 | 1979-03-30 | Circuit selection system for television signal |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55132144A true JPS55132144A (en) | 1980-10-14 |
Family
ID=12545014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3914879A Pending JPS55132144A (en) | 1979-03-30 | 1979-03-30 | Circuit selection system for television signal |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55132144A (en) |
-
1979
- 1979-03-30 JP JP3914879A patent/JPS55132144A/en active Pending
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