JPS56169965A - Data conversion circuit - Google Patents
Data conversion circuitInfo
- Publication number
- JPS56169965A JPS56169965A JP7385180A JP7385180A JPS56169965A JP S56169965 A JPS56169965 A JP S56169965A JP 7385180 A JP7385180 A JP 7385180A JP 7385180 A JP7385180 A JP 7385180A JP S56169965 A JPS56169965 A JP S56169965A
- Authority
- JP
- Japan
- Prior art keywords
- rom8
- address
- original
- output signal
- mode designation
- 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
- H04N1/419—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information in which encoding of the length of a succession of picture-elements of the same value along a scanning line is the only encoding step
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Image Signal Circuits (AREA)
- Processing Or Creating Images (AREA)
- Image Processing (AREA)
Abstract
PURPOSE:To perform a specified change of data with a mode designation bit, by providing the mode designation bit at a part of the address of a data conversion circuit having an ROM and arranging a plurality of conversion data to one ROM. CONSTITUTION:The background of an original 1 is white, then a mode designation bit selecting switch 5 is set to the OFF position, and the input of an address A2 of an ROM8 is kept 0 at all times via a power supply potential holding buffer 7. Further, when the background is black, the switch 5 is turned on, and the address A2 of the ROM8 is set to 1. The address A2 is set to the upper and lower stages of the ROM8, the characters of the original 1 are read in at a readout device 2, so that the output can be accessed with addresses A1, A0 of the ROM8 via input buffers 3, 4. When the output signal of the device 2 is 00,01, the output signal of the ROM8 is taken as 0, the white color of the original 1 is fed to a recorder 10. When the output signal is 10, 11, the output signal is taken to 1, and the black color of the original 1 is displayed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7385180A JPS56169965A (en) | 1980-06-02 | 1980-06-02 | Data conversion circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7385180A JPS56169965A (en) | 1980-06-02 | 1980-06-02 | Data conversion circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56169965A true JPS56169965A (en) | 1981-12-26 |
Family
ID=13530059
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7385180A Pending JPS56169965A (en) | 1980-06-02 | 1980-06-02 | Data conversion circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56169965A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61115183A (en) * | 1984-11-09 | 1986-06-02 | Toshiba Corp | Density gradation converting system in dark and light image processing |
JPS6251370A (en) * | 1985-08-30 | 1987-03-06 | Hitachi Electronics Eng Co Ltd | Scanner |
JPS6297474A (en) * | 1985-10-23 | 1987-05-06 | Toshiba Corp | Image processor |
JPS62163181A (en) * | 1986-01-14 | 1987-07-18 | Canon Inc | Picture processing circuit |
JPS63111582A (en) * | 1986-10-29 | 1988-05-16 | Canon Inc | Image processor |
-
1980
- 1980-06-02 JP JP7385180A patent/JPS56169965A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61115183A (en) * | 1984-11-09 | 1986-06-02 | Toshiba Corp | Density gradation converting system in dark and light image processing |
JPH0550783B2 (en) * | 1984-11-09 | 1993-07-29 | Tokyo Shibaura Electric Co | |
JPS6251370A (en) * | 1985-08-30 | 1987-03-06 | Hitachi Electronics Eng Co Ltd | Scanner |
JPS6297474A (en) * | 1985-10-23 | 1987-05-06 | Toshiba Corp | Image processor |
JPS62163181A (en) * | 1986-01-14 | 1987-07-18 | Canon Inc | Picture processing circuit |
JPS63111582A (en) * | 1986-10-29 | 1988-05-16 | Canon Inc | Image processor |
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