JPS56136082A - Facsimile equipment - Google Patents

Facsimile equipment

Info

Publication number
JPS56136082A
JPS56136082A JP3748480A JP3748480A JPS56136082A JP S56136082 A JPS56136082 A JP S56136082A JP 3748480 A JP3748480 A JP 3748480A JP 3748480 A JP3748480 A JP 3748480A JP S56136082 A JPS56136082 A JP S56136082A
Authority
JP
Japan
Prior art keywords
line
unit
block code
density
scanning
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
JP3748480A
Other languages
Japanese (ja)
Inventor
Hidekazu Hara
Seiichi Hayashi
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP3748480A priority Critical patent/JPS56136082A/en
Publication of JPS56136082A publication Critical patent/JPS56136082A/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
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/17—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa the scanning speed being dependent on content of picture

Landscapes

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

Abstract

PURPOSE:To realize high-speed operation by decreasing scanning line density when the block of the 1st line agree with that of the current line frequently. CONSTITUTION:The output of photoelectric conversion unit 1 which scans a transmitted original and converts optical information into an electric signal is sent to encoding processing unit 7 by way of change-over switches 4 and 5, and line memories 2 and 3 to be made into a block code, which is modulated by modulation part 9 and transmitted. The output of encoding processing unit 7, on the other hand, is applied to read control unit 11 by way of block code comparison and detection unit 13 and scanning-line-density change-over unit 14. Namely, block code comparison and detection unit 13 makes a bit-to-bit comparison between the block code of the last line and that of the current line and, when the rate of the coincidence exceeds a prescribed value, decreases the scanning line density of photoelectric conversion unit 1.
JP3748480A 1980-03-26 1980-03-26 Facsimile equipment Pending JPS56136082A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3748480A JPS56136082A (en) 1980-03-26 1980-03-26 Facsimile equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3748480A JPS56136082A (en) 1980-03-26 1980-03-26 Facsimile equipment

Publications (1)

Publication Number Publication Date
JPS56136082A true JPS56136082A (en) 1981-10-23

Family

ID=12498788

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3748480A Pending JPS56136082A (en) 1980-03-26 1980-03-26 Facsimile equipment

Country Status (1)

Country Link
JP (1) JPS56136082A (en)

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