JPS5635543A - Instantaneous companding signal transmission system - Google Patents

Instantaneous companding signal transmission system

Info

Publication number
JPS5635543A
JPS5635543A JP10974179A JP10974179A JPS5635543A JP S5635543 A JPS5635543 A JP S5635543A JP 10974179 A JP10974179 A JP 10974179A JP 10974179 A JP10974179 A JP 10974179A JP S5635543 A JPS5635543 A JP S5635543A
Authority
JP
Japan
Prior art keywords
signal
amplitude
transmission side
gain
transmission
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
JP10974179A
Other languages
Japanese (ja)
Inventor
Takanobu Ayabe
Yoichi Imaizumi
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 JP10974179A priority Critical patent/JPS5635543A/en
Publication of JPS5635543A publication Critical patent/JPS5635543A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/62—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
    • H04B1/64—Volume compression or expansion arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

PURPOSE:To decrease greatly the number of the bits which are used for transmission of the digital signal, by compressing the amplitude at the transmission side and by the control signal in accordance with the signal amplitude and thus securing the polygonal line property. CONSTITUTION:The signal receiver 7 separates the signal sent through the transmission line 6 into the signal showing the presence or absence of the control signal S and the normal digital signal. Then the digital signal is applied to the D/A converter 8 to be turned into the analog signal to be then supplied to the variable gain amplifier 10. At the same time, the signal showing the presence or absence of the signal S is decided by the deciding circuit 9. And when the signal S is present, a control is given to change greatly the gain of the amplifier 10 on the contrary to the transmission side. And in case the signal S is absent, no change is given to the gain to have the normal amplification. As a result, the signals higher than the input signal level at the transmission side are transmitted with the compressed amplitude and then amplitude at the reception side with an increased gain. Accordingly, the received signal level at the expanded receiving signal using device 11 becomes similar to the transmission side.
JP10974179A 1979-08-30 1979-08-30 Instantaneous companding signal transmission system Pending JPS5635543A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10974179A JPS5635543A (en) 1979-08-30 1979-08-30 Instantaneous companding signal transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10974179A JPS5635543A (en) 1979-08-30 1979-08-30 Instantaneous companding signal transmission system

Publications (1)

Publication Number Publication Date
JPS5635543A true JPS5635543A (en) 1981-04-08

Family

ID=14518064

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10974179A Pending JPS5635543A (en) 1979-08-30 1979-08-30 Instantaneous companding signal transmission system

Country Status (1)

Country Link
JP (1) JPS5635543A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4403052A (en) * 1982-08-30 1983-09-06 Allied Corporation Injection moldable poly(ethylene terephthalate)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4403052A (en) * 1982-08-30 1983-09-06 Allied Corporation Injection moldable poly(ethylene terephthalate)

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