JPS5454518A - Coding system - Google Patents

Coding system

Info

Publication number
JPS5454518A
JPS5454518A JP12174277A JP12174277A JPS5454518A JP S5454518 A JPS5454518 A JP S5454518A JP 12174277 A JP12174277 A JP 12174277A JP 12174277 A JP12174277 A JP 12174277A JP S5454518 A JPS5454518 A JP S5454518A
Authority
JP
Japan
Prior art keywords
circuit
signal
expected
integrator
output
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
JP12174277A
Other languages
Japanese (ja)
Other versions
JPS6028453B2 (en
Inventor
Hideo Kuroda
Hiroshi Morita
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP52121742A priority Critical patent/JPS6028453B2/en
Publication of JPS5454518A publication Critical patent/JPS5454518A/en
Publication of JPS6028453B2 publication Critical patent/JPS6028453B2/en
Expired legal-status Critical Current

Links

Abstract

PURPOSE: To decrease the deterioration in the SN ratio in the decoding signal, by shifting the dynamic range of the quantizer according to the output value of integrator so that the effect of the delivery line error can remarkably be reduced in a shor time.
CONSTITUTION: The differential unit 3 takes difference between the input signal converted 2 into digital signal and the output signal of the delay circuit 8, that is, the expected value, and quantizes 4 the expected error signal (e) and delivers the output signal to the weighting circuit 5 and the code assignment circuit 9. Next, the integrator 6 adds the expected error signal including the quantized error fed from the circuit 5 to the output value of itself, and after this is delayed by one sampling period at the circuit 8, it is outputted as the expected signal for the next sampling. Further, the discriminating circuit 10 controls the code assignment of the circuit 9 and the dynamic range of the quantizer 4 depending on the output amplitude of the integrator 6
COPYRIGHT: (C)1979,JPO&Japio
JP52121742A 1977-10-11 1977-10-11 Encoding method Expired JPS6028453B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52121742A JPS6028453B2 (en) 1977-10-11 1977-10-11 Encoding method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52121742A JPS6028453B2 (en) 1977-10-11 1977-10-11 Encoding method

Publications (2)

Publication Number Publication Date
JPS5454518A true JPS5454518A (en) 1979-04-28
JPS6028453B2 JPS6028453B2 (en) 1985-07-04

Family

ID=14818746

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52121742A Expired JPS6028453B2 (en) 1977-10-11 1977-10-11 Encoding method

Country Status (1)

Country Link
JP (1) JPS6028453B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5731278A (en) * 1980-07-31 1982-02-19 Matsushita Electric Ind Co Ltd Estimate coding transmitter
JPS6221390A (en) * 1985-07-19 1987-01-29 Matsushita Electric Ind Co Ltd Encoder

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3217789B2 (en) * 1992-11-17 2001-10-15 富士通株式会社 Digital image communication device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5731278A (en) * 1980-07-31 1982-02-19 Matsushita Electric Ind Co Ltd Estimate coding transmitter
JPS6221390A (en) * 1985-07-19 1987-01-29 Matsushita Electric Ind Co Ltd Encoder

Also Published As

Publication number Publication date
JPS6028453B2 (en) 1985-07-04

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