JPS57180246A - Digital data signal multiplexing system - Google Patents

Digital data signal multiplexing system

Info

Publication number
JPS57180246A
JPS57180246A JP6424981A JP6424981A JPS57180246A JP S57180246 A JPS57180246 A JP S57180246A JP 6424981 A JP6424981 A JP 6424981A JP 6424981 A JP6424981 A JP 6424981A JP S57180246 A JPS57180246 A JP S57180246A
Authority
JP
Japan
Prior art keywords
signal
digital data
tone
code
multiplexing
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
JP6424981A
Other languages
Japanese (ja)
Inventor
Junichi Kimura
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP6424981A priority Critical patent/JPS57180246A/en
Publication of JPS57180246A publication Critical patent/JPS57180246A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/17—Time-division multiplex systems in which the transmission channel allotted to a first user may be taken away and re-allotted to a second user if the first user becomes inactive, e.g. TASI
    • H04J3/172—Digital speech interpolation, i.e. DSI

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

PURPOSE:To multiplex an audio PCM signal and a digital data signal, by assigning a specific code for separation and pickup at no-tone, in a system multiplexing and transmitting the digital data signal into an audio PCM code train through multiplexing. CONSTITUTION:When a code indicating no-tone out of an audio PCM transmission signal 200 is detected by a multiplexing circuit 120, a transmission data frame 204 succeeding to the no-tone code is read out and transmitted. Thereafter, when codes other than the no-tone code are detected, the transmission data frame 204 is stopped and then, a re-corded PCM signal 201 is transmitted. At a reception side, a digital data multiplexing signal 300 is inputted and when a specific code succeeding to the no-tone signal is detected, a reception data frame 302 is transmitted to a digital data reproducing circuit 150 and a restored digital data reception signal 303 is outputted.
JP6424981A 1981-04-30 1981-04-30 Digital data signal multiplexing system Pending JPS57180246A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6424981A JPS57180246A (en) 1981-04-30 1981-04-30 Digital data signal multiplexing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6424981A JPS57180246A (en) 1981-04-30 1981-04-30 Digital data signal multiplexing system

Publications (1)

Publication Number Publication Date
JPS57180246A true JPS57180246A (en) 1982-11-06

Family

ID=13252688

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6424981A Pending JPS57180246A (en) 1981-04-30 1981-04-30 Digital data signal multiplexing system

Country Status (1)

Country Link
JP (1) JPS57180246A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5999898A (en) * 1982-11-29 1984-06-08 Nec Corp Multiplex transmission system of voice line

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5999898A (en) * 1982-11-29 1984-06-08 Nec Corp Multiplex transmission system of voice line

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