JPS5588479A - Picture signal coding process system - Google Patents
Picture signal coding process systemInfo
- Publication number
- JPS5588479A JPS5588479A JP16212478A JP16212478A JPS5588479A JP S5588479 A JPS5588479 A JP S5588479A JP 16212478 A JP16212478 A JP 16212478A JP 16212478 A JP16212478 A JP 16212478A JP S5588479 A JPS5588479 A JP S5588479A
- Authority
- JP
- Japan
- Prior art keywords
- output
- selector
- signals
- given
- quantizer
- 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 ensure the high compression to the picture signals with addition of a small number of circuits by varying the coding bit number according to the nature of the DC-AC conversion block and then distributing the bit number to each component of the predictive error signals.
CONSTITUTION: The picture input given from terminal 1 is converted into the digital signals through A/D converter 2 and then applied to Hadamard converter 3 to deliver Hadamard conversion output YN. This output YN is applied to one side of subtractor circuit 4, and then output EN of circuit 4 is applied to mode selector 5 and quantizer 6. The absolute value of the predictive error signal is compared with the prescribed threshold level by selector 5. And then the mode division is given to several units of signals which are under the threshold level simultaneously from the low frequency component among the predictive error signals which are given ordering from the low to high frequency components, thus one mode being selected. Then the control is given to the characteristics of quantizer 6 via selector 5, and at the same time the transmission code is produced at coder 7 by the output of selector 5 as well as output ZN of quantizer 6 to be transmitted to the transmission line.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16212478A JPS6041915B2 (en) | 1978-12-26 | 1978-12-26 | Image signal encoding processing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16212478A JPS6041915B2 (en) | 1978-12-26 | 1978-12-26 | Image signal encoding processing method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5588479A true JPS5588479A (en) | 1980-07-04 |
JPS6041915B2 JPS6041915B2 (en) | 1985-09-19 |
Family
ID=15748489
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16212478A Expired JPS6041915B2 (en) | 1978-12-26 | 1978-12-26 | Image signal encoding processing method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6041915B2 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5746545A (en) * | 1980-07-04 | 1982-03-17 | Philips Nv | Method and device for encoding video signal |
JPS5992688A (en) * | 1982-11-19 | 1984-05-28 | Fuji Photo Film Co Ltd | Adaptive picture compression system |
JPS59185469A (en) * | 1983-04-04 | 1984-10-22 | Fuji Photo Film Co Ltd | Adaptation type picture compressing system |
JPS6057770A (en) * | 1983-09-08 | 1985-04-03 | Matsushita Electric Ind Co Ltd | Method for modulating differential pulse code of picture |
JPS61147692A (en) * | 1984-12-21 | 1986-07-05 | Nec Corp | Data compression/expansion method |
JPS6382079A (en) * | 1986-09-25 | 1988-04-12 | Nec Corp | Method and device for encoding moving picture signal |
JPS63111791A (en) * | 1986-10-30 | 1988-05-17 | Nec Corp | Method and device for coding moving image signal |
JPH08237659A (en) * | 1984-12-21 | 1996-09-13 | Thomson Grand Public | Adaptive decoder for continuous image |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60156513U (en) * | 1984-03-28 | 1985-10-18 | ケル株式会社 | fiber optic connector |
-
1978
- 1978-12-26 JP JP16212478A patent/JPS6041915B2/en not_active Expired
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5746545A (en) * | 1980-07-04 | 1982-03-17 | Philips Nv | Method and device for encoding video signal |
JPS5992688A (en) * | 1982-11-19 | 1984-05-28 | Fuji Photo Film Co Ltd | Adaptive picture compression system |
JPH0161278B2 (en) * | 1982-11-19 | 1989-12-27 | Fuji Photo Film Co Ltd | |
JPS59185469A (en) * | 1983-04-04 | 1984-10-22 | Fuji Photo Film Co Ltd | Adaptation type picture compressing system |
JPS6057770A (en) * | 1983-09-08 | 1985-04-03 | Matsushita Electric Ind Co Ltd | Method for modulating differential pulse code of picture |
JPS61147692A (en) * | 1984-12-21 | 1986-07-05 | Nec Corp | Data compression/expansion method |
JPH08237659A (en) * | 1984-12-21 | 1996-09-13 | Thomson Grand Public | Adaptive decoder for continuous image |
JPS6382079A (en) * | 1986-09-25 | 1988-04-12 | Nec Corp | Method and device for encoding moving picture signal |
JPS63111791A (en) * | 1986-10-30 | 1988-05-17 | Nec Corp | Method and device for coding moving image signal |
JPH0545117B2 (en) * | 1986-10-30 | 1993-07-08 | Nippon Electric Co |
Also Published As
Publication number | Publication date |
---|---|
JPS6041915B2 (en) | 1985-09-19 |
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