JPS57132477A - Decoding system for variable length code - Google Patents

Decoding system for variable length code

Info

Publication number
JPS57132477A
JPS57132477A JP56016849A JP1684981A JPS57132477A JP S57132477 A JPS57132477 A JP S57132477A JP 56016849 A JP56016849 A JP 56016849A JP 1684981 A JP1684981 A JP 1684981A JP S57132477 A JPS57132477 A JP S57132477A
Authority
JP
Japan
Prior art keywords
code
inputted
register
eol
circuit
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
JP56016849A
Other languages
Japanese (ja)
Inventor
Toshiaki Yamada
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 JP56016849A priority Critical patent/JPS57132477A/en
Publication of JPS57132477A publication Critical patent/JPS57132477A/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)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Facsimile Transmission Control (AREA)

Abstract

PURPOSE:To prevent affection of a code error from extending to the next line, by achieving sure detection of a line synchronizing signal even with the code error. CONSTITUTION:A data DT of a variable length code is inputted to a shift register 1 in synchronizing with a clock CLK. This clock CLK is also inputted to a 0 consecutive counter 5A of an EOL (line synchronizing signal) detection section 5 to count the number of consecutive 0s of data DT inputted to the register 1, and when the count number reaches 11, it is stored with a 11-storing latch circuit 5B. Thereafter, when 1 is inputted to the least significant bit of the register 1, the AND condition of an AND gate circuit 5C is established and this output is recognized as EOL. In this case, the output of the circuit 5C clears the register 1, code length counter 2, FF3, counter 5A, and circuit 5B respectively. Thus, if there is any error in code, the EOL is surely detected.
JP56016849A 1981-02-09 1981-02-09 Decoding system for variable length code Pending JPS57132477A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56016849A JPS57132477A (en) 1981-02-09 1981-02-09 Decoding system for variable length code

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56016849A JPS57132477A (en) 1981-02-09 1981-02-09 Decoding system for variable length code

Publications (1)

Publication Number Publication Date
JPS57132477A true JPS57132477A (en) 1982-08-16

Family

ID=11927655

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56016849A Pending JPS57132477A (en) 1981-02-09 1981-02-09 Decoding system for variable length code

Country Status (1)

Country Link
JP (1) JPS57132477A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5579565A (en) * 1978-12-12 1980-06-16 Fujitsu Ltd Picture signal decoding system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5579565A (en) * 1978-12-12 1980-06-16 Fujitsu Ltd Picture signal decoding system

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