JPS5457905A - Delta modulation and demodulation system - Google Patents

Delta modulation and demodulation system

Info

Publication number
JPS5457905A
JPS5457905A JP12479777A JP12479777A JPS5457905A JP S5457905 A JPS5457905 A JP S5457905A JP 12479777 A JP12479777 A JP 12479777A JP 12479777 A JP12479777 A JP 12479777A JP S5457905 A JPS5457905 A JP S5457905A
Authority
JP
Japan
Prior art keywords
signals
delta
characteristic
output
input
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
JP12479777A
Other languages
Japanese (ja)
Inventor
Masaru Asahara
Ryushiro Yoshizawa
Takao Hara
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 JP12479777A priority Critical patent/JPS5457905A/en
Publication of JPS5457905A publication Critical patent/JPS5457905A/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

Abstract

PURPOSE:To suppress the occurrence of cross modulation distortion for two signals without deteriorating the frequency characteristic of a transmission band and S/N, by attenuating enough high-band components of input signals in the SCPC satellite communication system, etc. CONSTITUTION:Input signals, which consist of sound signals or MF signals, from an exchange are coded dependently upon delta modulation in delta modulator 13 after having high-band components suppressed enough by input equalizer 12 which has characteristic A, and the coded output is transmitted through a modulator and a transmitter. In the receiving side, demodulated signals are applied to delta demodulator 16 to reproduce low-frequency signals. Then, original signals are reproduced faithfully by causing these signals to pass through output equalizer 17 which has characteristic B, and the output is transmitted to an exchange.
JP12479777A 1977-10-18 1977-10-18 Delta modulation and demodulation system Pending JPS5457905A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12479777A JPS5457905A (en) 1977-10-18 1977-10-18 Delta modulation and demodulation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12479777A JPS5457905A (en) 1977-10-18 1977-10-18 Delta modulation and demodulation system

Publications (1)

Publication Number Publication Date
JPS5457905A true JPS5457905A (en) 1979-05-10

Family

ID=14894350

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12479777A Pending JPS5457905A (en) 1977-10-18 1977-10-18 Delta modulation and demodulation system

Country Status (1)

Country Link
JP (1) JPS5457905A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5992642A (en) * 1982-11-19 1984-05-28 Sanyo Electric Co Ltd Encoding transmission system
US4700361A (en) * 1983-10-07 1987-10-13 Dolby Laboratories Licensing Corporation Spectral emphasis and de-emphasis

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5992642A (en) * 1982-11-19 1984-05-28 Sanyo Electric Co Ltd Encoding transmission system
US4700361A (en) * 1983-10-07 1987-10-13 Dolby Laboratories Licensing Corporation Spectral emphasis and de-emphasis

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