JPS6427358A - Frequency division multiplex interphone transmission system - Google Patents

Frequency division multiplex interphone transmission system

Info

Publication number
JPS6427358A
JPS6427358A JP17012488A JP17012488A JPS6427358A JP S6427358 A JPS6427358 A JP S6427358A JP 17012488 A JP17012488 A JP 17012488A JP 17012488 A JP17012488 A JP 17012488A JP S6427358 A JPS6427358 A JP S6427358A
Authority
JP
Japan
Prior art keywords
voice signal
incoming voice
bpf
outgoing
carrier
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
JP17012488A
Other languages
Japanese (ja)
Inventor
Toyoji Suzuki
Masahiko Takeda
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.)
Aiphone Co Ltd
Original Assignee
Aiphone 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 Aiphone Co Ltd filed Critical Aiphone Co Ltd
Priority to JP17012488A priority Critical patent/JPS6427358A/en
Publication of JPS6427358A publication Critical patent/JPS6427358A/en
Pending legal-status Critical Current

Links

Landscapes

  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)

Abstract

PURPOSE:To attain modulation/demodulation of a video signal with less noise through one transmission cable by using an incoming voice signal carrier and an outgoing voice signal carrier attenuated to a degree not giving any disturbance different from a video signal carrier. CONSTITUTION:An outgoing voice signal reception circuit 9 is so constituted that it receives an outgoing voice signal from a BPF 6 and sends the demodulated outgoing voicesignal to a speaker 11. The incoming voice signal transmission circuit 9 uses an incoming voice signal generated from a microphone 12 so as to modulate the incoming voice signal carrier and sends the modulated incoming voice signal to a BPF 7. The incoming voice signal carrier has a frequency of 6MHz and is attenuated to a degree not giving any disturbance on the modulated video signal. A master set 2 in a room consists of a signal interface 13, a television monitor 17, an incoming voice signal reception circuit 18, an outgoing voice signal transmission circuit 19 and a handset 20. A BPF 14 is used for a video signal of 4MHz band, a BPF 15 is used for an incoming voice signal in 6MHz and a BPF 16 is for an outgoing voice signal.
JP17012488A 1988-07-08 1988-07-08 Frequency division multiplex interphone transmission system Pending JPS6427358A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17012488A JPS6427358A (en) 1988-07-08 1988-07-08 Frequency division multiplex interphone transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17012488A JPS6427358A (en) 1988-07-08 1988-07-08 Frequency division multiplex interphone transmission system

Publications (1)

Publication Number Publication Date
JPS6427358A true JPS6427358A (en) 1989-01-30

Family

ID=15899089

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17012488A Pending JPS6427358A (en) 1988-07-08 1988-07-08 Frequency division multiplex interphone transmission system

Country Status (1)

Country Link
JP (1) JPS6427358A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02101653U (en) * 1989-01-31 1990-08-13
JPH02268055A (en) * 1989-04-09 1990-11-01 Matsushita Electric Works Ltd Interphone system for loudspeaker talking system
WO1993011637A1 (en) * 1991-12-05 1993-06-10 Inline Connection Corporation Rf broadcast and cable television distribution system and two-way rf communication
US6181783B1 (en) 1989-07-14 2001-01-30 Inline Connection Corporation Data and telephone wiring terminal
US6192399B1 (en) 1997-07-11 2001-02-20 Inline Connections Corporation Twisted pair communication system
US6236718B1 (en) 1989-07-14 2001-05-22 Inline Connections Corporation Video transmission and control system utilizing internal telephone lines

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49115416A (en) * 1973-03-05 1974-11-05
JPS5714576B2 (en) * 1977-02-09 1982-03-25

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49115416A (en) * 1973-03-05 1974-11-05
JPS5714576B2 (en) * 1977-02-09 1982-03-25

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02101653U (en) * 1989-01-31 1990-08-13
JPH02268055A (en) * 1989-04-09 1990-11-01 Matsushita Electric Works Ltd Interphone system for loudspeaker talking system
US6181783B1 (en) 1989-07-14 2001-01-30 Inline Connection Corporation Data and telephone wiring terminal
US6185284B1 (en) 1989-07-14 2001-02-06 Inline Connections Corporation Voice and data transmission over twisted wire pairs
US6236718B1 (en) 1989-07-14 2001-05-22 Inline Connections Corporation Video transmission and control system utilizing internal telephone lines
WO1993011637A1 (en) * 1991-12-05 1993-06-10 Inline Connection Corporation Rf broadcast and cable television distribution system and two-way rf communication
US6192399B1 (en) 1997-07-11 2001-02-20 Inline Connections Corporation Twisted pair communication system
US7110511B2 (en) 1997-07-11 2006-09-19 Inline Connection Corporation Twisted pair communication system

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