JPS5784680A - Data compression system - Google Patents

Data compression system

Info

Publication number
JPS5784680A
JPS5784680A JP16046180A JP16046180A JPS5784680A JP S5784680 A JPS5784680 A JP S5784680A JP 16046180 A JP16046180 A JP 16046180A JP 16046180 A JP16046180 A JP 16046180A JP S5784680 A JPS5784680 A JP S5784680A
Authority
JP
Japan
Prior art keywords
data
counter
white
memory
black
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
JP16046180A
Other languages
Japanese (ja)
Inventor
Masashi Gomi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP16046180A priority Critical patent/JPS5784680A/en
Publication of JPS5784680A publication Critical patent/JPS5784680A/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)
  • Image Processing (AREA)

Abstract

PURPOSE:To increase the compression efficiency, by transmitting the state of data and number of consecutiveness through coding, when the data of consecutive blocks are all the same, in the data compression of each block. CONSTITUTION:One optical scanning region on an original 1 is of band phase, which is split into video elements. The contrast information is stored in a memory B1. A counter K1 counts a clock pulse reading out the memory B1 one by one bit. When the content of the memory B1 changes (that is, if the changing point of white/black is present), the content of the counter K1 is transferred to a register R. When the count value of the counter K1 is monitored and the data for one scanning share are all white, the counter K1 makes count until the black data inputs next, and the data indicating consecutively white is transmitted at a bundle.
JP16046180A 1980-11-14 1980-11-14 Data compression system Pending JPS5784680A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16046180A JPS5784680A (en) 1980-11-14 1980-11-14 Data compression system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16046180A JPS5784680A (en) 1980-11-14 1980-11-14 Data compression system

Publications (1)

Publication Number Publication Date
JPS5784680A true JPS5784680A (en) 1982-05-27

Family

ID=15715435

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16046180A Pending JPS5784680A (en) 1980-11-14 1980-11-14 Data compression system

Country Status (1)

Country Link
JP (1) JPS5784680A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60109972A (en) * 1983-11-18 1985-06-15 Nec Corp Data compressing and expanding system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60109972A (en) * 1983-11-18 1985-06-15 Nec Corp Data compressing and expanding system

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