JPS56169965A - Data conversion circuit - Google Patents

Data conversion circuit

Info

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
Application number
JP7385180A
Other languages
Japanese (ja)
Inventor
Hiromasa Isobe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP7385180A priority Critical patent/JPS56169965A/en
Publication of JPS56169965A publication Critical patent/JPS56169965A/en
Pending legal-status Critical Current

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)
  • Processing Or Creating Images (AREA)
  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (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.
JP7385180A 1980-06-02 1980-06-02 Data conversion circuit Pending JPS56169965A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (6)

* Cited by examiner, † Cited by third party
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

Similar Documents

Publication Publication Date Title
JPS56169965A (en) Data conversion circuit
JPS57153375A (en) Automatic conversion system of half-square and full-square characters
JPS5710853A (en) Memory device
JPS5757080A (en) Picture processing device
JPS5616991A (en) Semicondcutor memory unit
JPS55135452A (en) Terminal unit
JPS57169866A (en) Picture magnification varying device
JPS57162193A (en) Large capacity memory device
JPS55102046A (en) Logic circuit
JPS56101247A (en) Audio output device
EP0024720A3 (en) Circuitry for processing data in a data processing system consisting of a central processor, a main memory and an interposed buffer memory
JPS5755447A (en) Data converting circuit
JPS5732196A (en) Channel converter
JPS56117479A (en) Decoding system
JPS57108959A (en) Data storage device of electronic dictionary
JPS6443891A (en) Semiconductor memory device
JPS54158829A (en) Semiconductor memory device
JPS57182859A (en) Monitor device for programmable controller
JPS6479997A (en) P-rom
JPS5680885A (en) Data output control system of memory used for reading
JPS5764853A (en) Bus tracing device
JPS5730045A (en) List processor
JPS5561842A (en) Character display unit
JPS57162199A (en) Scan out system
JPS6459427A (en) Burst converting circuit