JPS5579570A - Method and device for band compression - Google Patents
Method and device for band compressionInfo
- Publication number
- JPS5579570A JPS5579570A JP15387478A JP15387478A JPS5579570A JP S5579570 A JPS5579570 A JP S5579570A JP 15387478 A JP15387478 A JP 15387478A JP 15387478 A JP15387478 A JP 15387478A JP S5579570 A JPS5579570 A JP S5579570A
- Authority
- JP
- Japan
- Prior art keywords
- signals
- signal
- group
- coded
- memory unit
- 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
Links
Abstract
PURPOSE: To compress a signal at a high rate wihtout deteriorating picture quality by converting a picture into a binary picture signal and then by making use of correlations between upper and lower, and right and left picture elements.
CONSTITUTION: A signal from read scanner 201 is coded by A/D converter 202 into a binary signal, which is stored in memory unit 223. Next, switches 203 and 206 are connected to terminals 204 and 206 to code 210 signals of group 1 for two lines at a time, and coded signals are stored in buffer memory unit 211. With switches 203 and 206 connected to terminals 205 and 208, signals of group 2 to coincidence and dissidence signal generating circuit 209. Signals of group 1 are applied to forecasting circuit 801, which forecasts signals between scanning lines, and they are compared 802 with signals of group 2. Then, when both signals agree each other, "0" is generated and when disagreeing, "1" is generated. This output "1" is coded by coder 210 by using a correction signal. Those signals are stored in buffer memory unit 211.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15387478A JPS5579570A (en) | 1978-12-12 | 1978-12-12 | Method and device for band compression |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15387478A JPS5579570A (en) | 1978-12-12 | 1978-12-12 | Method and device for band compression |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5579570A true JPS5579570A (en) | 1980-06-16 |
Family
ID=15571990
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15387478A Pending JPS5579570A (en) | 1978-12-12 | 1978-12-12 | Method and device for band compression |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5579570A (en) |
-
1978
- 1978-12-12 JP JP15387478A patent/JPS5579570A/en active Pending
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