JPS567564A - Transmission recording system for facsimile video signal - Google Patents
Transmission recording system for facsimile video signalInfo
- Publication number
- JPS567564A JPS567564A JP8333279A JP8333279A JPS567564A JP S567564 A JPS567564 A JP S567564A JP 8333279 A JP8333279 A JP 8333279A JP 8333279 A JP8333279 A JP 8333279A JP S567564 A JPS567564 A JP S567564A
- Authority
- JP
- Japan
- Prior art keywords
- white
- black
- unit
- video signal
- signal
- 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
- H04N1/41—Bandwidth or redundancy reduction
- H04N1/411—Bandwidth or redundancy reduction for the transmission or storage or reproduction of two-tone pictures, e.g. black and white pictures
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
Abstract
PURPOSE:To decrease the transmission time, by taking two video elements adjacent on each line of original as one unit, judging ''white'' when the both of each one unit are white, and transmitting the black-and-while run length number in compressed code. CONSTITUTION:The output from the original read-in means 1 of self-scanning type is sequentially binarized at the binary circuit 2, and the vido signal of white and black binary type is contained in the first buffer memory 3. This signal is introduced to the shift register 4 and to the controller 8 through the OR gates 5, 6, and exclusive OR gate 7. The controller 8 takes consecutive 2 bits of video signal as one unit, and if both of one units are white, it is judged as ''white'' and if at least one is black, it is judged as ''black'', the number of run lengths for white and black is converted into compression code at the coding memory 13 and transmitted to the reception side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8333279A JPS567564A (en) | 1979-06-29 | 1979-06-29 | Transmission recording system for facsimile video signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8333279A JPS567564A (en) | 1979-06-29 | 1979-06-29 | Transmission recording system for facsimile video signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS567564A true JPS567564A (en) | 1981-01-26 |
Family
ID=13799468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8333279A Pending JPS567564A (en) | 1979-06-29 | 1979-06-29 | Transmission recording system for facsimile video signal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS567564A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4475127A (en) * | 1981-02-24 | 1984-10-02 | Nippon Electric Co., Ltd. | System for transmitting a video signal with short runs avoided in a signal encoded from the video signal |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5176009A (en) * | 1974-12-26 | 1976-07-01 | Sharp Kk | FUAKUSHI MIRISOCHI |
| JPS5280712A (en) * | 1975-12-27 | 1977-07-06 | Oki Electric Ind Co Ltd | Facsimile signal band compression system |
-
1979
- 1979-06-29 JP JP8333279A patent/JPS567564A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5176009A (en) * | 1974-12-26 | 1976-07-01 | Sharp Kk | FUAKUSHI MIRISOCHI |
| JPS5280712A (en) * | 1975-12-27 | 1977-07-06 | Oki Electric Ind Co Ltd | Facsimile signal band compression system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4475127A (en) * | 1981-02-24 | 1984-10-02 | Nippon Electric Co., Ltd. | System for transmitting a video signal with short runs avoided in a signal encoded from the video signal |
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