JPS56162572A - Transmission system for facsimile picture signal - Google Patents
Transmission system for facsimile picture signalInfo
- Publication number
- JPS56162572A JPS56162572A JP6670180A JP6670180A JPS56162572A JP S56162572 A JPS56162572 A JP S56162572A JP 6670180 A JP6670180 A JP 6670180A JP 6670180 A JP6670180 A JP 6670180A JP S56162572 A JPS56162572 A JP S56162572A
- Authority
- JP
- Japan
- Prior art keywords
- white
- lines
- skip
- information
- line
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/17—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa the scanning speed being dependent on content of picture
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Abstract
PURPOSE:To compress transmitted data effectively in case of an original with a large white ground by transmitting information showing whether all lines are white or not in addition to information on a white black skip and then by making a white line skip over lines when the all-white line information is transmitted. CONSTITUTION:Picture signals by lines on an original are set to a change coupled device CCD11 and wirtten in a picture memory 12 at addresses A0-A10 from a counter 13 and they are also sent to a change-over switch 18. The said operations are controlled by a controller 14 using a microprocessor, etc. The picture signal from the CCD11 is branched and applied to an all-line-white detecting circuit 15 and a block-by-block all-white detecting circuit 16 and when the circuit 15 detects the information showing that all lines of a block code are white about two lines, a skip line signal SKIPL is sent to a device 14 to edit the block code, thereby controlling a switch 18. Further, the circuit 16 detects white skip information and applied it to the device 14, which compresses effectively the transmitted data of an original with a large white ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6670180A JPS56162572A (en) | 1980-05-20 | 1980-05-20 | Transmission system for facsimile picture signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6670180A JPS56162572A (en) | 1980-05-20 | 1980-05-20 | Transmission system for facsimile picture signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56162572A true JPS56162572A (en) | 1981-12-14 |
Family
ID=13323499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6670180A Pending JPS56162572A (en) | 1980-05-20 | 1980-05-20 | Transmission system for facsimile picture signal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56162572A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60109972A (en) * | 1983-11-18 | 1985-06-15 | Nec Corp | Data compressing and expanding system |
| JPS60206374A (en) * | 1984-03-30 | 1985-10-17 | Fuji Xerox Co Ltd | Binary-coding information compressing and encoding system |
-
1980
- 1980-05-20 JP JP6670180A patent/JPS56162572A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60109972A (en) * | 1983-11-18 | 1985-06-15 | Nec Corp | Data compressing and expanding system |
| JPS60206374A (en) * | 1984-03-30 | 1985-10-17 | Fuji Xerox Co Ltd | Binary-coding information compressing and encoding system |
| JPH0528026B2 (en) * | 1984-03-30 | 1993-04-23 | Fuji Xerox Co Ltd |
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