JPS55120248A - Sound signal/control signal simultaneous transmission system - Google Patents

Sound signal/control signal simultaneous transmission system

Info

Publication number
JPS55120248A
JPS55120248A JP2688779A JP2688779A JPS55120248A JP S55120248 A JPS55120248 A JP S55120248A JP 2688779 A JP2688779 A JP 2688779A JP 2688779 A JP2688779 A JP 2688779A JP S55120248 A JPS55120248 A JP S55120248A
Authority
JP
Japan
Prior art keywords
signal
sound
control signal
diffused
false random
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
JP2688779A
Other languages
Japanese (ja)
Inventor
Akio Sasaki
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 Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP2688779A priority Critical patent/JPS55120248A/en
Publication of JPS55120248A publication Critical patent/JPS55120248A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B15/00—Suppression or limitation of noise or interference

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To enable sound transmission of high quality on a radio communication system and also to reduce sound malfunctions by transmitting a control signal in a sound channel by a false random signal through spectral diffusion. CONSTITUTION:Control signal S1 is diffused into the band of false random signal fp in mixer 3 centering on the center frequency of signal S1 to obtain diffused control signal f1d. Signal f1d is added 5 to sound signal S2 and addition signal F1 is sent to transmission line 6. On the reception side, input signal F2 is reverse diffused by false random signal fn in mixer 7 to obtain reverse-diffused control signal F3 and from signal F4 whose S/N has been improved by BPF9, only control signal S1 is discriminated and detected 10. Thus, sound malfunctions can be reduced on the basis of the diversity effect on the spectral diffusion system without deteriorating the quality of sound signal S2, thereby making use of channels efficiently.
JP2688779A 1979-03-08 1979-03-08 Sound signal/control signal simultaneous transmission system Pending JPS55120248A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2688779A JPS55120248A (en) 1979-03-08 1979-03-08 Sound signal/control signal simultaneous transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2688779A JPS55120248A (en) 1979-03-08 1979-03-08 Sound signal/control signal simultaneous transmission system

Publications (1)

Publication Number Publication Date
JPS55120248A true JPS55120248A (en) 1980-09-16

Family

ID=12205766

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2688779A Pending JPS55120248A (en) 1979-03-08 1979-03-08 Sound signal/control signal simultaneous transmission system

Country Status (1)

Country Link
JP (1) JPS55120248A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6051355A (en) * 1983-07-21 1985-03-22 ソシエテ・ナシオナル・デテユ−ド・エ・ドウ・コンストリユクシオン・ドウ・モト−ル・ダヴイアシオン、“エス．エヌ．ウ．セ．エム．ア−．” Method and device for coding and decoding wide band signal

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS529311A (en) * 1975-07-12 1977-01-24 Yuuseidaijin Ssra communication system using line separator signal

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS529311A (en) * 1975-07-12 1977-01-24 Yuuseidaijin Ssra communication system using line separator signal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6051355A (en) * 1983-07-21 1985-03-22 ソシエテ・ナシオナル・デテユ−ド・エ・ドウ・コンストリユクシオン・ドウ・モト−ル・ダヴイアシオン、“エス．エヌ．ウ．セ．エム．ア−．” Method and device for coding and decoding wide band signal
JPH0522420B2 (en) * 1983-07-21 1993-03-29 Nashionaru Dechuudo E Do Konsutoryukushion De Motooru Dabiashion Soc

Similar Documents

Publication Publication Date Title
GB927570A (en) Multiplex repeater terminal
DE3485534D1 (en) WIRELESS PHONE.
FR2044847A5 (en)
GB2000926A (en) Channel Selector for Television Receiver
JPS55120248A (en) Sound signal/control signal simultaneous transmission system
SE8103035L (en) RADIORECEIVER
JPS5255405A (en) Pilot test system
JPS56114457A (en) Wavelength-multiplex ring bus system
JPS562756A (en) Simultaneous transmission and receiving mobile radio system
JPS5245813A (en) Wireless telephone system
JPS648738A (en) Radio communication system
JPS5673936A (en) S/n monitor
JPS524722A (en) Diversity reception system
JPS5656053A (en) Multiplex communication system for sound signal and data or picture signal
JPS562788A (en) Order telephone service system
JPS5210015A (en) Transmitter and receiver with wide band range cable
JPS534413A (en) Hybrid multiplez transmission systen for broacdast lines and telephone lines
JPS56169950A (en) Multiplex communication system
JPS5612188A (en) Remote control system
JPS5539426A (en) Emergency calling system for radio communication system
JPS5694895A (en) Conference-type communication process system
JPS5767337A (en) Community receiving device
JPS5354404A (en) Ssb communication system
Ulanov Reception of Complex Signals in Parallel Channels on a Background of White Noise and Spectrum-Concentrated Interference.
FR2357118A1 (en) Bilateral digital radio communications system - has OR=gate which eliminates one of binary signals and accepts received binary signal