JPS5698950A - Transmission system of digital modulation wave - Google Patents

Transmission system of digital modulation wave

Info

Publication number
JPS5698950A
JPS5698950A JP114980A JP114980A JPS5698950A JP S5698950 A JPS5698950 A JP S5698950A JP 114980 A JP114980 A JP 114980A JP 114980 A JP114980 A JP 114980A JP S5698950 A JPS5698950 A JP S5698950A
Authority
JP
Japan
Prior art keywords
signal
sample
bits
digital modulation
modulation
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
JP114980A
Other languages
Japanese (ja)
Inventor
Masao Kasuga
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.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan 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 Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Priority to JP114980A priority Critical patent/JPS5698950A/en
Priority to NLAANVRAGE8006810,A priority patent/NL190093C/en
Priority to GB8040416A priority patent/GB2070361B/en
Priority to DE3047447A priority patent/DE3047447C2/en
Priority to US06/217,949 priority patent/US4355304A/en
Publication of JPS5698950A publication Critical patent/JPS5698950A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
    • H04B14/046—Systems or methods for reducing noise or bandwidth
    • H04B14/048—Non linear compression or expansion
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/007—Volume compression or expansion in amplifiers of digital or coded signals

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

PURPOSE:To transmit the information with high quality in less number of bits, by taking the modulation signal as the difference signal and making digital modulation for the signal obtained thru the gain control, in transmitting the number of bits of modulation wave with compression. CONSTITUTION:The output analog signal of a voltage comparator 3 is the analog difference signal which is the subtraction of the analog signal at present for the analog signal at the time before one sample interval. After this is sample-held at the sample hold circuit 6, it is fed to the variable gain amplifier 7 and the signal prediction circuit 8. The sample difference signal picked up from the said gain amplifier 7 is a signal within a certain level, and it is fed to an AD converter 19 and in digital modulation with quantization and coding. Thus, the information with high quality can be transmitted in less number of bits.
JP114980A 1979-12-17 1980-01-09 Transmission system of digital modulation wave Pending JPS5698950A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP114980A JPS5698950A (en) 1980-01-09 1980-01-09 Transmission system of digital modulation wave
NLAANVRAGE8006810,A NL190093C (en) 1979-12-17 1980-12-16 COMPRESSING AND EXPANDING SYSTEM.
GB8040416A GB2070361B (en) 1979-12-17 1980-12-17 Gain control
DE3047447A DE3047447C2 (en) 1979-12-17 1980-12-17 Digital amplifier for expanding or narrowing the dynamic range of a digital input signal sent to the amplifier as required
US06/217,949 US4355304A (en) 1979-12-17 1980-12-18 Digital compandor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP114980A JPS5698950A (en) 1980-01-09 1980-01-09 Transmission system of digital modulation wave

Publications (1)

Publication Number Publication Date
JPS5698950A true JPS5698950A (en) 1981-08-08

Family

ID=11493376

Family Applications (1)

Application Number Title Priority Date Filing Date
JP114980A Pending JPS5698950A (en) 1979-12-17 1980-01-09 Transmission system of digital modulation wave

Country Status (1)

Country Link
JP (1) JPS5698950A (en)

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