JPS56143767A - Redundancy compressor - Google Patents

Redundancy compressor

Info

Publication number
JPS56143767A
JPS56143767A JP4725480A JP4725480A JPS56143767A JP S56143767 A JPS56143767 A JP S56143767A JP 4725480 A JP4725480 A JP 4725480A JP 4725480 A JP4725480 A JP 4725480A JP S56143767 A JPS56143767 A JP S56143767A
Authority
JP
Japan
Prior art keywords
decimal point
picture elements
digits
parts
floating
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
JP4725480A
Other languages
Japanese (ja)
Inventor
Shinichi Tachikake
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP4725480A priority Critical patent/JPS56143767A/en
Publication of JPS56143767A publication Critical patent/JPS56143767A/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)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

PURPOSE:To shorten processing time by counting the numbers of white picture elements and black picture elements appearing on one main scanning line, by converting them into binary floating-decimal point display, and by counting the number of digits of a run-length code from two binary floating-decimal point displaying numerals. CONSTITUTION:Picture elements read successively by a main scan are counted by picture-element number counters 1 and 2 corresponding to black and white picture elements respectively. On the completion of the main scan, binary floating-decimal point converting circuits 3a and 3b perform conversion for floating-decimal point display. Outputs of converting circuits 3a and 3b are separated into mantissa parts 6a and 6b, and exponent parts 7a and 7b; mantissa parts 6a and 6b are supplied to comparator 4 to send the result to subtracting circuit 5, which subtracts by exponent parts 7a and 7b and by ''1'' according to the result of comparator 4, finding the number of digits of run-length code digits.
JP4725480A 1980-04-10 1980-04-10 Redundancy compressor Pending JPS56143767A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4725480A JPS56143767A (en) 1980-04-10 1980-04-10 Redundancy compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4725480A JPS56143767A (en) 1980-04-10 1980-04-10 Redundancy compressor

Publications (1)

Publication Number Publication Date
JPS56143767A true JPS56143767A (en) 1981-11-09

Family

ID=12770127

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4725480A Pending JPS56143767A (en) 1980-04-10 1980-04-10 Redundancy compressor

Country Status (1)

Country Link
JP (1) JPS56143767A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2545671A1 (en) * 1983-05-07 1984-11-09 Nippon Telegraph & Telephone SYSTEM FOR COMPRESSING IMAGE DATA

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2545671A1 (en) * 1983-05-07 1984-11-09 Nippon Telegraph & Telephone SYSTEM FOR COMPRESSING IMAGE DATA

Similar Documents

Publication Publication Date Title
EP0395273A3 (en) Motion dependent video signal processing
JPS5564445A (en) Code converter circuit
ATE78124T1 (en) METHOD AND APPARATUS FOR BINARY-DECIMAL CONVERSION.
JPS56143767A (en) Redundancy compressor
ATE74223T1 (en) ELECTRONIC CASH REGISTER.
GB1354993A (en) Pattern processing apparatus
JPS6434067A (en) Halftone image encoder
EP0050809B1 (en) Segmented display device
GB2228352A (en) Sheet for data code and method of recognizing the code
JPS6477374A (en) Image data compression system
JPS57159378A (en) Optical letter reading device
JPS56162180A (en) Optical reading device of character
JPS57183179A (en) Compressed data processing method
JPS57174979A (en) Picture synthesizer
JPS55163466A (en) Checking method for relay contact transfer testing circuit
ES8405994A1 (en) Code confirmation circuit.
JPS6467081A (en) Discriminating circuit for video signal form
JPS644187A (en) Image input type tracing device
JPS57150278A (en) Picture signal encoding device
JPS57197635A (en) Keyboard device
JPS57178543A (en) Digital comparator
ES8607584A1 (en) System for the digital processing and display of images.
JPS52111335A (en) Ereader for information
JPS5673972A (en) Rejection system of low density picture signal
JPS57173290A (en) Time code generator