JPS55128967A - Encoding device - Google Patents

Encoding device

Info

Publication number
JPS55128967A
JPS55128967A JP3645279A JP3645279A JPS55128967A JP S55128967 A JPS55128967 A JP S55128967A JP 3645279 A JP3645279 A JP 3645279A JP 3645279 A JP3645279 A JP 3645279A JP S55128967 A JPS55128967 A JP S55128967A
Authority
JP
Japan
Prior art keywords
encoding
bit
stored
buffer memory
code table
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.)
Granted
Application number
JP3645279A
Other languages
Japanese (ja)
Other versions
JPS6351429B2 (en
Inventor
Takanori Masuda
Mitsuhide Nagasawa
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 JP3645279A priority Critical patent/JPS55128967A/en
Publication of JPS55128967A publication Critical patent/JPS55128967A/en
Publication of JPS6351429B2 publication Critical patent/JPS6351429B2/ja
Granted 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
    • H04N1/417—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information using predictive or differential encoding

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Storing Facsimile Image Data (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

PURPOSE:To realize the high-speed encoding process by constructing the encoding device with encoding control data storing ROM, the input picture signal storing buffer memory, the encoding code table storing ROM, the picture element number counter, the transmission data producing counter and others. CONSTITUTION:For encoding device ENC which converts the binary coded picture signal into the serial data through the encoding compression, the picture signals equivalent to two lines of coding and reference each are stored into RAM5 of buffer memory BUF. For the process of each line, the simultaneous reading is given by one bit and then the presence or absence of the changing point is examined by changing point detector 14 and then encoded to be stored in changing picture element number counters 6 and 15. Both the encoding control data stored in ROM3 and the encoding code table data stored in ROM7 are read out to the common bus to be applied to bit detector 8 and transmission data producing counter 13, and then transferred by one bit in accordance with the bit request signal of transmission control part TCO.
JP3645279A 1979-03-28 1979-03-28 Encoding device Granted JPS55128967A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3645279A JPS55128967A (en) 1979-03-28 1979-03-28 Encoding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3645279A JPS55128967A (en) 1979-03-28 1979-03-28 Encoding device

Related Child Applications (3)

Application Number Title Priority Date Filing Date
JP16119079A Division JPS55128968A (en) 1979-12-12 1979-12-12 Encoding system
JP16119279A Division JPS55128970A (en) 1979-12-12 1979-12-12 Encoding system
JP16119179A Division JPS5616376A (en) 1979-12-12 1979-12-12 Coding device

Publications (2)

Publication Number Publication Date
JPS55128967A true JPS55128967A (en) 1980-10-06
JPS6351429B2 JPS6351429B2 (en) 1988-10-13

Family

ID=12470201

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3645279A Granted JPS55128967A (en) 1979-03-28 1979-03-28 Encoding device

Country Status (1)

Country Link
JP (1) JPS55128967A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57141176A (en) * 1981-02-26 1982-09-01 Fujitsu Ltd Detection system for synchronizing signal in facsimile signal
JPS58177069A (en) * 1982-04-08 1983-10-17 Sharp Corp Facsimile device
JPS59175283A (en) * 1983-03-24 1984-10-04 Nec Corp Coding circuit of facsimile
JPS6019360A (en) * 1983-07-12 1985-01-31 Nec Corp Decoding circuit of facsimile

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57141176A (en) * 1981-02-26 1982-09-01 Fujitsu Ltd Detection system for synchronizing signal in facsimile signal
JPS6151463B2 (en) * 1981-02-26 1986-11-08 Fujitsu Ltd
JPS58177069A (en) * 1982-04-08 1983-10-17 Sharp Corp Facsimile device
JPH023351B2 (en) * 1982-04-08 1990-01-23 Sharp Kk
JPS59175283A (en) * 1983-03-24 1984-10-04 Nec Corp Coding circuit of facsimile
JPH0220034B2 (en) * 1983-03-24 1990-05-07 Nippon Electric Co
JPS6019360A (en) * 1983-07-12 1985-01-31 Nec Corp Decoding circuit of facsimile
JPH0220195B2 (en) * 1983-07-12 1990-05-08 Nippon Electric Co

Also Published As

Publication number Publication date
JPS6351429B2 (en) 1988-10-13

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