JPS5454518A - Coding system - Google Patents
Coding systemInfo
- 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
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
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)
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)
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 |
-
1977
- 1977-10-11 JP JP52121742A patent/JPS6028453B2/en not_active Expired
Cited By (2)
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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