JPS5583358A - Sound signal transmitter-receiver - Google Patents

Sound signal transmitter-receiver

Info

Publication number
JPS5583358A
JPS5583358A JP16546878A JP16546878A JPS5583358A JP S5583358 A JPS5583358 A JP S5583358A JP 16546878 A JP16546878 A JP 16546878A JP 16546878 A JP16546878 A JP 16546878A JP S5583358 A JPS5583358 A JP S5583358A
Authority
JP
Japan
Prior art keywords
pulse
signal
modulation
modulated wave
phase
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
JP16546878A
Other languages
Japanese (ja)
Inventor
Takao Ikegami
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Priority to JP16546878A priority Critical patent/JPS5583358A/en
Publication of JPS5583358A publication Critical patent/JPS5583358A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J9/00—Multiplex systems in which each channel is represented by a different type of modulation of the carrier

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Stereophonic System (AREA)
  • Circuits Of Receivers In General (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To make it possible to 1st and 2nd sound signals without mutual radio interference by sending both sound signals from LED after pulse-width modulation and pulse-phase modulation. CONSTITUTION:Pulse-width modulator 1 provides pulse modulation by sound signal S1 and its output is sent out by putting LED5 into operation; and pulse-phase modulator 2 attains pulse phase modulation by sound signal S2 and its output is sent out by letting LED6 come on. modulated wave light emitted by LEDs 5 and 6 are detected by photo detecting element 7 at the same time and converted into an electric signal, and FM detector 9 demodulates the pulse-phase modulated wave to regenerate signal S1 from speaker 13 while LPF10 demodulates the pulse-width modulated wave to regenerate signal S2 from speaker 14. Consequently, two kinds of sound signals can be sent without mutual radio interference.
JP16546878A 1978-12-20 1978-12-20 Sound signal transmitter-receiver Pending JPS5583358A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16546878A JPS5583358A (en) 1978-12-20 1978-12-20 Sound signal transmitter-receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16546878A JPS5583358A (en) 1978-12-20 1978-12-20 Sound signal transmitter-receiver

Publications (1)

Publication Number Publication Date
JPS5583358A true JPS5583358A (en) 1980-06-23

Family

ID=15812979

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16546878A Pending JPS5583358A (en) 1978-12-20 1978-12-20 Sound signal transmitter-receiver

Country Status (1)

Country Link
JP (1) JPS5583358A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6313434A (en) * 1986-07-03 1988-01-20 Stanley Electric Co Ltd Sound signal communicating method for acoustic equipment for vehicle
JPH04123633U (en) * 1991-04-26 1992-11-10 新日本無線株式会社 optical audio transmission system
JPH05327624A (en) * 1992-05-26 1993-12-10 Sharp Corp Optical transmitter-receiver

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6313434A (en) * 1986-07-03 1988-01-20 Stanley Electric Co Ltd Sound signal communicating method for acoustic equipment for vehicle
JPH04123633U (en) * 1991-04-26 1992-11-10 新日本無線株式会社 optical audio transmission system
JPH05327624A (en) * 1992-05-26 1993-12-10 Sharp Corp Optical transmitter-receiver

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