JPS5632871A - Facsimile signal receiver - Google Patents

Facsimile signal receiver

Info

Publication number
JPS5632871A
JPS5632871A JP10816579A JP10816579A JPS5632871A JP S5632871 A JPS5632871 A JP S5632871A JP 10816579 A JP10816579 A JP 10816579A JP 10816579 A JP10816579 A JP 10816579A JP S5632871 A JPS5632871 A JP S5632871A
Authority
JP
Japan
Prior art keywords
transmission time
block
scanning line
substitute
transmission
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
JP10816579A
Other languages
Japanese (ja)
Inventor
Kunihiko Sekiya
Katsuhiko Kuma
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP10816579A priority Critical patent/JPS5632871A/en
Publication of JPS5632871A publication Critical patent/JPS5632871A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE:To reduce the deterioration of a picture by limiting the substitute recording of excessive scanning lines by deciding whether a synchronizing signal is normal or not by checking the volume of transmitted information by a facsimile signal receiver. CONSTITUTION:Data for one scanning line transmitted through transmission line 1 are coded as one block and a fascimile signal with an added synchronizing signal that indicates punctuation of the block is received to check the transmission time of the block. When this transmission time is shorter than the shortest transmission time of one block previously fixed between the transmission side and reception side, a decision on that the detected synchronizing signal is not normal is made and the substitute scanning line of the corresponding block is not recorded. When the transmission time of two continuous blocks is shorter than the shortest transmission time and the sum of both the transmission times is longer than the shortest transmission time, data for one scanning line right before two corresponding blocks is recorded at the substitute scanning line. Thus, the recording of an excessive substitute scanning line can be limited, so that the deterioration of the quality of a recording picture can be prevented.
JP10816579A 1979-08-27 1979-08-27 Facsimile signal receiver Pending JPS5632871A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10816579A JPS5632871A (en) 1979-08-27 1979-08-27 Facsimile signal receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10816579A JPS5632871A (en) 1979-08-27 1979-08-27 Facsimile signal receiver

Publications (1)

Publication Number Publication Date
JPS5632871A true JPS5632871A (en) 1981-04-02

Family

ID=14477614

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10816579A Pending JPS5632871A (en) 1979-08-27 1979-08-27 Facsimile signal receiver

Country Status (1)

Country Link
JP (1) JPS5632871A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62250883A (en) * 1986-04-21 1987-10-31 Meidensha Electric Mfg Co Ltd Automatic change-over mechanism for inverter
JPH0613399U (en) * 1993-04-22 1994-02-18 株式会社明電舎 Inverter automatic switching device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62250883A (en) * 1986-04-21 1987-10-31 Meidensha Electric Mfg Co Ltd Automatic change-over mechanism for inverter
JPH0613399U (en) * 1993-04-22 1994-02-18 株式会社明電舎 Inverter automatic switching device

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