JPS5779769A - Image transmitter - Google Patents

Image transmitter

Info

Publication number
JPS5779769A
JPS5779769A JP15517680A JP15517680A JPS5779769A JP S5779769 A JPS5779769 A JP S5779769A JP 15517680 A JP15517680 A JP 15517680A JP 15517680 A JP15517680 A JP 15517680A JP S5779769 A JPS5779769 A JP S5779769A
Authority
JP
Japan
Prior art keywords
signals
transmission
discriminates
gate
block
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
JP15517680A
Other languages
Japanese (ja)
Inventor
Hiroshi Shinoda
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP15517680A priority Critical patent/JPS5779769A/en
Publication of JPS5779769A publication Critical patent/JPS5779769A/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
    • H04N1/415—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information in which the picture-elements are subdivided or grouped into fixed one-dimensional [1D] or two-dimensional [2D] blocks

Landscapes

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

Abstract

PURPOSE:To reduce the transmission time, by detecting unnecessary information and compressing this information without transmission. CONSTITUTION:A video signal read out at an original reader 1 is sequentially stored to line memories 2, 3 and inputted to a discriminating circuit 8, AND gate 15 and exclusive OR gate 4. The discriminating circuit 8 discriminates if black signal is included in one block signal train transferred to a shift register 9 or all are white signals. If the circuit 8 discriminates all are white signals, the transmission of all the signals belonging to the block is inhibited a control signal is transmitted instead of said signals.
JP15517680A 1980-11-06 1980-11-06 Image transmitter Pending JPS5779769A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15517680A JPS5779769A (en) 1980-11-06 1980-11-06 Image transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15517680A JPS5779769A (en) 1980-11-06 1980-11-06 Image transmitter

Publications (1)

Publication Number Publication Date
JPS5779769A true JPS5779769A (en) 1982-05-19

Family

ID=15600149

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15517680A Pending JPS5779769A (en) 1980-11-06 1980-11-06 Image transmitter

Country Status (1)

Country Link
JP (1) JPS5779769A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6184163A (en) * 1984-10-01 1986-04-28 Yonezawa Nihondenki Kk Encoding system for image data
JPS6447173A (en) * 1987-08-18 1989-02-21 Fujitsu Ltd System for compressing picture data
JPS6447171A (en) * 1987-08-18 1989-02-21 Sanyo Electric Co System for coding picture data
JPH02287494A (en) * 1989-04-28 1990-11-27 Moji Zukei Center:Kk Character information compressing method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6184163A (en) * 1984-10-01 1986-04-28 Yonezawa Nihondenki Kk Encoding system for image data
JPS6447173A (en) * 1987-08-18 1989-02-21 Fujitsu Ltd System for compressing picture data
JPS6447171A (en) * 1987-08-18 1989-02-21 Sanyo Electric Co System for coding picture data
JPH02287494A (en) * 1989-04-28 1990-11-27 Moji Zukei Center:Kk Character information compressing method

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