JPS56106470A - Compressing system of facsimile information - Google Patents

Compressing system of facsimile information

Info

Publication number
JPS56106470A
JPS56106470A JP830880A JP830880A JPS56106470A JP S56106470 A JPS56106470 A JP S56106470A JP 830880 A JP830880 A JP 830880A JP 830880 A JP830880 A JP 830880A JP S56106470 A JPS56106470 A JP S56106470A
Authority
JP
Japan
Prior art keywords
picture information
information
signal
coding
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
JP830880A
Other languages
Japanese (ja)
Inventor
Sadao Egami
Shuichi Hirano
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 JP830880A priority Critical patent/JPS56106470A/en
Publication of JPS56106470A publication Critical patent/JPS56106470A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Transmission Control (AREA)

Abstract

PURPOSE:To perform a condensation of information, by dividing equally both the synchronous signal and the section of picture information, coding the presence or absence of the picture information in each block as well as the total number of the present or absent block of picture information and then transmitting the picture information of the block having the picture information. CONSTITUTION:The transmitted original 1 is read by a line by the reading part 2 and then supplied to the coding part 3. The part 3 codes the synchronous signal and the section of picture information that are divided equally and sends them to the modulating part 4. The modulated signal is transmitted to the transmission line 7 from the transmission network control unit 5. The part 4 gives a coding to the presence or absence of the picture information within a block to turn it into a control signal, and also gives a coding to the total number of the blocks having information or no information to turn it into a check signal. Thus a condensation is given to the facsimile signal and at the same time the detection is facilitated for the synchronous signal. In such a way, a detection is made possible for an error.
JP830880A 1980-01-29 1980-01-29 Compressing system of facsimile information Pending JPS56106470A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP830880A JPS56106470A (en) 1980-01-29 1980-01-29 Compressing system of facsimile information

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP830880A JPS56106470A (en) 1980-01-29 1980-01-29 Compressing system of facsimile information

Publications (1)

Publication Number Publication Date
JPS56106470A true JPS56106470A (en) 1981-08-24

Family

ID=11689517

Family Applications (1)

Application Number Title Priority Date Filing Date
JP830880A Pending JPS56106470A (en) 1980-01-29 1980-01-29 Compressing system of facsimile information

Country Status (1)

Country Link
JP (1) JPS56106470A (en)

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