JPS5627547A - Method and device for predictive coding and decoding - Google Patents

Method and device for predictive coding and decoding

Info

Publication number
JPS5627547A
JPS5627547A JP10379979A JP10379979A JPS5627547A JP S5627547 A JPS5627547 A JP S5627547A JP 10379979 A JP10379979 A JP 10379979A JP 10379979 A JP10379979 A JP 10379979A JP S5627547 A JPS5627547 A JP S5627547A
Authority
JP
Japan
Prior art keywords
circuit
signal
output
predictor
predicted
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.)
Granted
Application number
JP10379979A
Other languages
Japanese (ja)
Other versions
JPS6244730B2 (en
Inventor
Kazuo Ochiai
Taku Arazeki
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 JP10379979A priority Critical patent/JPS5627547A/en
Publication of JPS5627547A publication Critical patent/JPS5627547A/en
Publication of JPS6244730B2 publication Critical patent/JPS6244730B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/3002—Conversion to or from differential modulation
    • H03M7/3044—Conversion to or from differential modulation with several bits only, i.e. the difference between successive samples being coded by more than one bit, e.g. differential pulse code modulation [DPCM]

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE:To attain excellent communication by a system that transmits and receives information codes as to every sample and other signals, by returning transmitted codes of a signal except information codes to a predicted-value calculating circuit when transmitting them. CONSTITUTION:A signal from input terminal 101 is led to subtracting circuit 102, where a signal from predictor 16 is substracted from it and its output is applied to quantizing circuit 103. Signal inserting circuit 104 inserts a signal from terminal 108 at fixed bit positions of circuit 103. The output of circuit 104 is sent out to the transmission line and also returned to predicted-value calculating circuit 107. The output of circuit 104 and that of predictor 106 are added together by adding circuit 105, whose output is a new input to predictor 106. This is returned to predicted- value calculating circuit 107, so that since the input to circuit 107 agrees with the output of the decoding circuit at the reception side at any time, excellent communication can be carried out.
JP10379979A 1979-08-14 1979-08-14 Method and device for predictive coding and decoding Granted JPS5627547A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10379979A JPS5627547A (en) 1979-08-14 1979-08-14 Method and device for predictive coding and decoding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10379979A JPS5627547A (en) 1979-08-14 1979-08-14 Method and device for predictive coding and decoding

Publications (2)

Publication Number Publication Date
JPS5627547A true JPS5627547A (en) 1981-03-17
JPS6244730B2 JPS6244730B2 (en) 1987-09-22

Family

ID=14363437

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10379979A Granted JPS5627547A (en) 1979-08-14 1979-08-14 Method and device for predictive coding and decoding

Country Status (1)

Country Link
JP (1) JPS5627547A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5923939A (en) * 1982-07-30 1984-02-07 Nec Corp System for compensating bit steal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5923939A (en) * 1982-07-30 1984-02-07 Nec Corp System for compensating bit steal
JPH0417491B2 (en) * 1982-07-30 1992-03-26 Nippon Electric Co

Also Published As

Publication number Publication date
JPS6244730B2 (en) 1987-09-22

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