JPS56116369A - Code conversion system for facsimile signal - Google Patents

Code conversion system for facsimile signal

Info

Publication number
JPS56116369A
JPS56116369A JP1946080A JP1946080A JPS56116369A JP S56116369 A JPS56116369 A JP S56116369A JP 1946080 A JP1946080 A JP 1946080A JP 1946080 A JP1946080 A JP 1946080A JP S56116369 A JPS56116369 A JP S56116369A
Authority
JP
Japan
Prior art keywords
line
circuit
code
information
dimension code
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
JP1946080A
Other languages
Japanese (ja)
Inventor
Toyomichi Yamada
Kenshirou Toyosaki
Hiroshi Ogawa
Masao Hiroyama
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP1946080A priority Critical patent/JPS56116369A/en
Publication of JPS56116369A publication Critical patent/JPS56116369A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To reduce processing time by omitting bit processing to a line memory, by using a changing point memory storing the changing position information in place of use of a line memory storing an original signal, in converting the secondary dimension code to the primary dimension code. CONSTITUTION:The secondary dimension code from an input line 21 is detected at a mode code identifying circuit 23 stored in an input buffer memory 22, and the secondary dimension code is converted into the control information with a0a1/a1a2 decoding circuit 24 from the code table provided according to the input in advance on the MH code decoding table 25. The changing point information on the coding line line is calculated with the control information from the circuit 24 at the a1/a2 calculation circuit 26, and the result is fed to the a0 and a1 register 32. With the control of the control circuit 28, it is stored in the present line and previous line changing point memory 27. The information of the changing position thus obtained is in primary dimension run length coding at the a0'/a1 coding circuit 35 to reduce the processing time.
JP1946080A 1980-02-18 1980-02-18 Code conversion system for facsimile signal Pending JPS56116369A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1946080A JPS56116369A (en) 1980-02-18 1980-02-18 Code conversion system for facsimile signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1946080A JPS56116369A (en) 1980-02-18 1980-02-18 Code conversion system for facsimile signal

Publications (1)

Publication Number Publication Date
JPS56116369A true JPS56116369A (en) 1981-09-12

Family

ID=11999925

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1946080A Pending JPS56116369A (en) 1980-02-18 1980-02-18 Code conversion system for facsimile signal

Country Status (1)

Country Link
JP (1) JPS56116369A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58101563A (en) * 1981-12-14 1983-06-16 Ricoh Co Ltd Facsimile device
JPS58101562A (en) * 1981-12-14 1983-06-16 Ricoh Co Ltd Facsimile deivce
JPS58225779A (en) * 1982-06-23 1983-12-27 Fujitsu Ltd Decoding system for picture signal
JPS60224380A (en) * 1984-04-23 1985-11-08 Nec Corp Facsimile data converting device
JPS60502078A (en) * 1983-08-19 1985-11-28 アドバンスト・マイクロ・ディバイシズ・インコ−ポレ−テッド Method and apparatus for decoding two-dimensional facsimile signals
JPS6214578A (en) * 1985-07-11 1987-01-23 Nec Corp Code converting system for facsimile signal
JPS62195979A (en) * 1986-02-24 1987-08-29 Mitsubishi Electric Corp Facsimile code converter
JPH0537794A (en) * 1991-08-01 1993-02-12 Matsushita Graphic Commun Syst Inc Coding and decoding method

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58101563A (en) * 1981-12-14 1983-06-16 Ricoh Co Ltd Facsimile device
JPS58101562A (en) * 1981-12-14 1983-06-16 Ricoh Co Ltd Facsimile deivce
JPS58225779A (en) * 1982-06-23 1983-12-27 Fujitsu Ltd Decoding system for picture signal
JPS6341270B2 (en) * 1982-06-23 1988-08-16 Fujitsu Ltd
JPS60502078A (en) * 1983-08-19 1985-11-28 アドバンスト・マイクロ・ディバイシズ・インコ−ポレ−テッド Method and apparatus for decoding two-dimensional facsimile signals
JPS60224380A (en) * 1984-04-23 1985-11-08 Nec Corp Facsimile data converting device
JPS6214578A (en) * 1985-07-11 1987-01-23 Nec Corp Code converting system for facsimile signal
JPS62195979A (en) * 1986-02-24 1987-08-29 Mitsubishi Electric Corp Facsimile code converter
JPH0537794A (en) * 1991-08-01 1993-02-12 Matsushita Graphic Commun Syst Inc Coding and decoding method

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