JPS5779769A - Image transmitter - Google Patents
Image transmitterInfo
- Publication number
- JPS5779769A JPS5779769A JP15517680A JP15517680A JPS5779769A JP S5779769 A JPS5779769 A JP S5779769A JP 15517680 A JP15517680 A JP 15517680A JP 15517680 A JP15517680 A JP 15517680A JP S5779769 A JPS5779769 A JP S5779769A
- Authority
- JP
- Japan
- Prior art keywords
- signals
- transmission
- discriminates
- gate
- block
- 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
- H04N1/413—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information
- H04N1/415—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information in which the picture-elements are subdivided or grouped into fixed one-dimensional or two-dimensional blocks
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
Abstract
PURPOSE:To reduce the transmission time, by detecting unnecessary information and compressing this information without transmission. CONSTITUTION:A video signal read out at an original reader 1 is sequentially stored to line memories 2, 3 and inputted to a discriminating circuit 8, AND gate 15 and exclusive OR gate 4. The discriminating circuit 8 discriminates if black signal is included in one block signal train transferred to a shift register 9 or all are white signals. If the circuit 8 discriminates all are white signals, the transmission of all the signals belonging to the block is inhibited a control signal is transmitted instead of said signals.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15517680A JPS5779769A (en) | 1980-11-06 | 1980-11-06 | Image transmitter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15517680A JPS5779769A (en) | 1980-11-06 | 1980-11-06 | Image transmitter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5779769A true JPS5779769A (en) | 1982-05-19 |
Family
ID=15600149
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15517680A Pending JPS5779769A (en) | 1980-11-06 | 1980-11-06 | Image transmitter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5779769A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6184163A (en) * | 1984-10-01 | 1986-04-28 | Yonezawa Nihondenki Kk | Encoding system for image data |
JPS6447171A (en) * | 1987-08-18 | 1989-02-21 | Sanyo Electric Co | System for coding picture data |
JPS6447173A (en) * | 1987-08-18 | 1989-02-21 | Fujitsu Ltd | System for compressing picture data |
JPH02287494A (en) * | 1989-04-28 | 1990-11-27 | Moji Zukei Center:Kk | Character information compressing method |
-
1980
- 1980-11-06 JP JP15517680A patent/JPS5779769A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6184163A (en) * | 1984-10-01 | 1986-04-28 | Yonezawa Nihondenki Kk | Encoding system for image data |
JPS6447171A (en) * | 1987-08-18 | 1989-02-21 | Sanyo Electric Co | System for coding picture data |
JPS6447173A (en) * | 1987-08-18 | 1989-02-21 | Fujitsu Ltd | System for compressing picture data |
JPH02287494A (en) * | 1989-04-28 | 1990-11-27 | Moji Zukei Center:Kk | Character information compressing method |
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