JPS5639674A - Signal tone transmission system - Google Patents

Signal tone transmission system

Info

Publication number
JPS5639674A
JPS5639674A JP11501679A JP11501679A JPS5639674A JP S5639674 A JPS5639674 A JP S5639674A JP 11501679 A JP11501679 A JP 11501679A JP 11501679 A JP11501679 A JP 11501679A JP S5639674 A JPS5639674 A JP S5639674A
Authority
JP
Japan
Prior art keywords
sound signal
signal
audible tone
tone signal
information
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.)
Granted
Application number
JP11501679A
Other languages
Japanese (ja)
Other versions
JPS5932942B2 (en
Inventor
Akira Kawasaki
Tatsuki Hayashi
Makoto Hiraoka
Yutaka Moriyama
Takeshi Sakai
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 JP11501679A priority Critical patent/JPS5932942B2/en
Publication of JPS5639674A publication Critical patent/JPS5639674A/en
Publication of JPS5932942B2 publication Critical patent/JPS5932942B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

PURPOSE:To prevent the absence of an audible tone signal, such as a busy tone, accompanying band compression, by independently coding a sound signal and audible tone signal and then by sending them in the same information frame. CONSTITUTION:To transmit a sound signal and audible tone signal via switchboard 2, the sound signal is band-compressed 7 on the basis of its feature spectrum information and the digital sound signal is transmitted in the form of frame information via the circuit. Further, the audible tone signal is separated from the sound signal through filters 8 and 9 and coded 9 and 11 into predetermined codes and coded signals are sent onto the circuit in the frame information. At the reception side, the sound signal and audible tone signal are reproduced on the basis of the frame information.
JP11501679A 1979-09-07 1979-09-07 Signal tone transmission method Expired JPS5932942B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11501679A JPS5932942B2 (en) 1979-09-07 1979-09-07 Signal tone transmission method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11501679A JPS5932942B2 (en) 1979-09-07 1979-09-07 Signal tone transmission method

Publications (2)

Publication Number Publication Date
JPS5639674A true JPS5639674A (en) 1981-04-15
JPS5932942B2 JPS5932942B2 (en) 1984-08-11

Family

ID=14652162

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11501679A Expired JPS5932942B2 (en) 1979-09-07 1979-09-07 Signal tone transmission method

Country Status (1)

Country Link
JP (1) JPS5932942B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6386933A (en) * 1986-09-30 1988-04-18 Nec Corp Voice information transmission system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6386933A (en) * 1986-09-30 1988-04-18 Nec Corp Voice information transmission system

Also Published As

Publication number Publication date
JPS5932942B2 (en) 1984-08-11

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