JPS56117479A - Decoding system - Google Patents

Decoding system

Info

Publication number
JPS56117479A
JPS56117479A JP2142180A JP2142180A JPS56117479A JP S56117479 A JPS56117479 A JP S56117479A JP 2142180 A JP2142180 A JP 2142180A JP 2142180 A JP2142180 A JP 2142180A JP S56117479 A JPS56117479 A JP S56117479A
Authority
JP
Japan
Prior art keywords
conversion table
picture signal
changing point
memory part
memory
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
JP2142180A
Other languages
Japanese (ja)
Other versions
JPS6132866B2 (en
Inventor
Kyoji Koseki
Naomi Kimura
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 JP2142180A priority Critical patent/JPS56117479A/en
Publication of JPS56117479A publication Critical patent/JPS56117479A/en
Publication of JPS6132866B2 publication Critical patent/JPS6132866B2/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
    • H04N1/419—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)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE:To reduce the time of decoding, by detecting only the changing point of a received run length code and then reproducing a picture signal with use of the changing point and a conversion table. CONSTITUTION:The run length codes S given from the communication circuit 1 are summed up by the counter 5 via the receiving circuit 2. The changing point, i.e., the result of totalization is set at ''1'' and then written into the buffer memory P successively. Then the contents of the memory P is read out by the reading circuit 7 and with every 4-bit addresses to be stored in the register 8. The output of the register 8 addresses the fixed memory part 10 that stores the conversion table (b) in the form of an address. The picture signal sent from the addressed conversion table is transmitted to the memory part 4. The signal memory part 9 gives a decision to white or black of the final bit of the picture signal and then stores 0 and 1 for white and black respectively. In such way, the time of decoding is reduced.
JP2142180A 1980-02-22 1980-02-22 Decoding system Granted JPS56117479A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2142180A JPS56117479A (en) 1980-02-22 1980-02-22 Decoding system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2142180A JPS56117479A (en) 1980-02-22 1980-02-22 Decoding system

Publications (2)

Publication Number Publication Date
JPS56117479A true JPS56117479A (en) 1981-09-14
JPS6132866B2 JPS6132866B2 (en) 1986-07-30

Family

ID=12054528

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2142180A Granted JPS56117479A (en) 1980-02-22 1980-02-22 Decoding system

Country Status (1)

Country Link
JP (1) JPS56117479A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4870498A (en) * 1987-09-15 1989-09-26 Printware, Inc. Decompressing run-length-encoded to transition-encoded font image information in an image generator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4870498A (en) * 1987-09-15 1989-09-26 Printware, Inc. Decompressing run-length-encoded to transition-encoded font image information in an image generator

Also Published As

Publication number Publication date
JPS6132866B2 (en) 1986-07-30

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