JPS5664528A - Digital transmission system - Google Patents

Digital transmission system

Info

Publication number
JPS5664528A
JPS5664528A JP14065979A JP14065979A JPS5664528A JP S5664528 A JPS5664528 A JP S5664528A JP 14065979 A JP14065979 A JP 14065979A JP 14065979 A JP14065979 A JP 14065979A JP S5664528 A JPS5664528 A JP S5664528A
Authority
JP
Japan
Prior art keywords
signal
digital
emphasized
demodulated
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
JP14065979A
Other languages
Japanese (ja)
Inventor
Makoto Nakamura
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP14065979A priority Critical patent/JPS5664528A/en
Publication of JPS5664528A publication Critical patent/JPS5664528A/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 improve the quality of the voice to be demodulated and reproduced, by adding the pre-emphasis circuit and the deemphasis circuit to the digital modulator and the digital demodulator at the transmission and reception sides. CONSTITUTION:The high-band component is emphasized through the pre-emphasis circuit 11 for the input signal e.g. the voice signal led to the input terminal 1 at the transmission side 10. This voice signal is then converted into the digital signal by the digital modulator 12 to be transmitted to the transmission line 3 through the output terminal 2. The digital signal transmitted to the input terminal 4 at the reception side 20 from the transmission side 10 via the line 3 is converted into the analog signal through the digital demodulator 21 and then demodulated. The low- band component is emphasized for the demodulated signal at the deemphasis circuit 22. Thus the emphasized signal is extracted at the output terminal 5 in the form the reproduced signal.
JP14065979A 1979-10-31 1979-10-31 Digital transmission system Pending JPS5664528A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14065979A JPS5664528A (en) 1979-10-31 1979-10-31 Digital transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14065979A JPS5664528A (en) 1979-10-31 1979-10-31 Digital transmission system

Publications (1)

Publication Number Publication Date
JPS5664528A true JPS5664528A (en) 1981-06-01

Family

ID=15273775

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14065979A Pending JPS5664528A (en) 1979-10-31 1979-10-31 Digital transmission system

Country Status (1)

Country Link
JP (1) JPS5664528A (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
JPH0420124A (en) * 1990-05-15 1992-01-23 Matsushita Electric Ind Co Ltd Digital signal processor

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
JPH0420124A (en) * 1990-05-15 1992-01-23 Matsushita Electric Ind Co Ltd Digital signal processor

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