JPS5553969A - Picture signal encoder - Google Patents
Picture signal encoderInfo
- Publication number
- JPS5553969A JPS5553969A JP12748578A JP12748578A JPS5553969A JP S5553969 A JPS5553969 A JP S5553969A JP 12748578 A JP12748578 A JP 12748578A JP 12748578 A JP12748578 A JP 12748578A JP S5553969 A JPS5553969 A JP S5553969A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- predictive
- samples
- picture
- predictive error
- 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 give the compression encoding to the picture signal including the mesh-spot picture by encoding the predictive error signal obtained through the automatic selection of distance D corresponding to the change of the mesh-spot pitch.
CONSTITUTION: Binary coded picture signal X is delayed by a fixed amount through register 2, line memory 5 and others to obtain samples A1∼A4 corresponding to picture elements a1∼a4. On the other hand, samples B1∼B4 delaying by the sample number equivalent to distance D are obtained through variable delay circuits 3a and 3b and then applied to ROM6 along with samples A1∼A4 to generate predictive value Pi. Value Pi is then supplied to exclusive logic sum circuit 7a, and thus predictive error signal Yi is delivered to be memorized in shift register 8. Comparator 10 transmits signal M to multiplexer 12a to select the minimum predictive noncoincidence number through counting and comparison. Here signal Yp featuring the minumum predictive error is delivered. Both signals Yp and M are sent to encoder 13 for the compression encoding, and thus the compression code is drawn out through output terminal 20.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12748578A JPS5553969A (en) | 1978-10-17 | 1978-10-17 | Picture signal encoder |
GB7905760A GB2016872B (en) | 1978-02-23 | 1979-02-19 | Digital facsimile transmission system for screened pictures |
US06/014,508 US4215375A (en) | 1978-02-23 | 1979-02-23 | Digital facsimile transmission system for screened pictures |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12748578A JPS5553969A (en) | 1978-10-17 | 1978-10-17 | Picture signal encoder |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5553969A true JPS5553969A (en) | 1980-04-19 |
JPS6145913B2 JPS6145913B2 (en) | 1986-10-11 |
Family
ID=14961098
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12748578A Granted JPS5553969A (en) | 1978-02-23 | 1978-10-17 | Picture signal encoder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5553969A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7221483B2 (en) | 2000-09-05 | 2007-05-22 | Ricoh Company, Ltd. | Image encoding method and apparatus, image decoding method and apparatus, image processing apparatus, image formation apparatus, and computer-executable programs |
-
1978
- 1978-10-17 JP JP12748578A patent/JPS5553969A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7221483B2 (en) | 2000-09-05 | 2007-05-22 | Ricoh Company, Ltd. | Image encoding method and apparatus, image decoding method and apparatus, image processing apparatus, image formation apparatus, and computer-executable programs |
Also Published As
Publication number | Publication date |
---|---|
JPS6145913B2 (en) | 1986-10-11 |
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