JPS5779732A - Waveform coder - Google Patents

Waveform coder

Info

Publication number
JPS5779732A
JPS5779732A JP15483480A JP15483480A JPS5779732A JP S5779732 A JPS5779732 A JP S5779732A JP 15483480 A JP15483480 A JP 15483480A JP 15483480 A JP15483480 A JP 15483480A JP S5779732 A JPS5779732 A JP S5779732A
Authority
JP
Japan
Prior art keywords
correlation
output
sampling interval
circuit
delta 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
JP15483480A
Other languages
Japanese (ja)
Inventor
Fumio Akashi
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP15483480A priority Critical patent/JPS5779732A/en
Publication of JPS5779732A publication Critical patent/JPS5779732A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M3/00—Conversion of analogue values to or from differential modulation
    • H03M3/02—Delta modulation, i.e. one-bit differential modulation
    • H03M3/022—Delta modulation, i.e. one-bit differential modulation with adaptable step size, e.g. adaptive delta modulation [ADM]

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

PURPOSE:To improve the efficiency, by taking correlativity of two consecutive signals of delta modulation and controlling the sampling interval with the output of correlativity. CONSTITUTION:An analog signal at a terminal 1 is sampled at a sampling circuit 2 and compared with the output of an integrating circuit at a comparison circuit 3 to be delta modulation signal.A delta modulation signal is applied to an integrator 5 and a shift register 6 and delayed for one sampling interval. The correlation between the output of the shift register 6 and the comparison circuit 3 is taken at a correlator 7, the output of correlation is applied to a sampling interval control circuit 8, allowing to make longer the sampling interval with correlation and make shorter it without correlation.
JP15483480A 1980-11-04 1980-11-04 Waveform coder Pending JPS5779732A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15483480A JPS5779732A (en) 1980-11-04 1980-11-04 Waveform coder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15483480A JPS5779732A (en) 1980-11-04 1980-11-04 Waveform coder

Publications (1)

Publication Number Publication Date
JPS5779732A true JPS5779732A (en) 1982-05-19

Family

ID=15592893

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15483480A Pending JPS5779732A (en) 1980-11-04 1980-11-04 Waveform coder

Country Status (1)

Country Link
JP (1) JPS5779732A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62500554A (en) * 1984-10-05 1987-03-05 ビ−エスア−ル　ノ−ス　アメリカ　リミテツド Analog-digital converter

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4991181A (en) * 1972-12-28 1974-08-30
JPS54100652A (en) * 1978-01-25 1979-08-08 Mitsubishi Electric Corp Sampler

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4991181A (en) * 1972-12-28 1974-08-30
JPS54100652A (en) * 1978-01-25 1979-08-08 Mitsubishi Electric Corp Sampler

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62500554A (en) * 1984-10-05 1987-03-05 ビ−エスア−ル　ノ−ス　アメリカ　リミテツド Analog-digital converter

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