JPS5673937A - Pcm communication system - Google Patents

Pcm communication system

Info

Publication number
JPS5673937A
JPS5673937A JP15044279A JP15044279A JPS5673937A JP S5673937 A JPS5673937 A JP S5673937A JP 15044279 A JP15044279 A JP 15044279A JP 15044279 A JP15044279 A JP 15044279A JP S5673937 A JPS5673937 A JP S5673937A
Authority
JP
Japan
Prior art keywords
pcm
signal
signals
output
multiplex
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
JP15044279A
Other languages
Japanese (ja)
Inventor
Takashi Matsuda
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP15044279A priority Critical patent/JPS5673937A/en
Publication of JPS5673937A publication Critical patent/JPS5673937A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
    • H04M3/561—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities by multiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

PURPOSE:To obtain the PCM communication system suitable for conference telephone, etc. by multiplexing a plurality sets of PCM signals in time sharing, and by obtaining synthesized output by D/A-converting multiplex PCM signal directly. CONSTITUTION:A signal in PCM transmitters 11-1 and 2 is multiplexed at a PCM multiplex device 12 and decoded at a PCM receiver to obtain the synthesized analog signal output. In the multiplex signal, the signal B is sectionally inserted between the signals A. A D/A converter 16 makes a PCM signal into two PAM signals, and the sampling frequency components are sufficiently suppressed through a low pass filter 18 under the control of a control signal from a timing signal generating circuit 17, and an instantaneous average value of both the A and B signals, that is, the analog signal of the sum component of both the signals, is output at the output terminals.
JP15044279A 1979-11-20 1979-11-20 Pcm communication system Pending JPS5673937A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15044279A JPS5673937A (en) 1979-11-20 1979-11-20 Pcm communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15044279A JPS5673937A (en) 1979-11-20 1979-11-20 Pcm communication system

Publications (1)

Publication Number Publication Date
JPS5673937A true JPS5673937A (en) 1981-06-19

Family

ID=15497013

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15044279A Pending JPS5673937A (en) 1979-11-20 1979-11-20 Pcm communication system

Country Status (1)

Country Link
JP (1) JPS5673937A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5830360U (en) * 1981-08-24 1983-02-28 株式会社山武 Average value calculation device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5830360U (en) * 1981-08-24 1983-02-28 株式会社山武 Average value calculation device

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