JPS5685973A - Transmission recording system of facsimile picture signal - Google Patents

Transmission recording system of facsimile picture signal

Info

Publication number
JPS5685973A
JPS5685973A JP16258079A JP16258079A JPS5685973A JP S5685973 A JPS5685973 A JP S5685973A JP 16258079 A JP16258079 A JP 16258079A JP 16258079 A JP16258079 A JP 16258079A JP S5685973 A JPS5685973 A JP S5685973A
Authority
JP
Japan
Prior art keywords
signal
dense
pieces
picture signal
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
JP16258079A
Other languages
Japanese (ja)
Inventor
Koji Ueda
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.)
Sanyo Electric Co Ltd
Original Assignee
Sanyo 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 Sanyo Electric Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP16258079A priority Critical patent/JPS5685973A/en
Publication of JPS5685973A publication Critical patent/JPS5685973A/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)
  • Storing Facsimile Image Data (AREA)

Abstract

PURPOSE:To remarkably reduce the transmission and recording time, by changing the transmission density per line according to whether the picture information is sparse or dense, transmitting the picture information, and recording it by changing the packing density in accordance with the picture information which has been transmitted, by the receiving side. CONSTITUTION:In case when it has been decided by the sparse or dense deciding circuit 7 that a binary picture signal of 1 line portion which has been read from the transmission original 1 is dense, the first detection signal is generated, and the binary picture signal V and the phase signal P are modulated by the carrier frequency and are sent. The number of scanning lines per unit length, namely, the scanning line density becomes 6 pieces/mm.. In case it has been decided that the binary picture signal of 1 line portion is scarse, the second detection signal is generated, a control signal C is generated in the latter half period of the phase signal period by the control signal generating and modulating circuit 11, and this signal C is modulated and sent out by the carrier frequency which is different from that of the binary picture signal V and the phase signal P. Accordingly, the scanning line density becomes 3 pieces/mm.. In case the control signal C has been detected by the receiving side, the scanning line density is recorded as 3 pieces/mm..
JP16258079A 1979-12-13 1979-12-13 Transmission recording system of facsimile picture signal Pending JPS5685973A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16258079A JPS5685973A (en) 1979-12-13 1979-12-13 Transmission recording system of facsimile picture signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16258079A JPS5685973A (en) 1979-12-13 1979-12-13 Transmission recording system of facsimile picture signal

Publications (1)

Publication Number Publication Date
JPS5685973A true JPS5685973A (en) 1981-07-13

Family

ID=15757282

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16258079A Pending JPS5685973A (en) 1979-12-13 1979-12-13 Transmission recording system of facsimile picture signal

Country Status (1)

Country Link
JP (1) JPS5685973A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002368326A (en) * 2001-06-05 2002-12-20 Furukawa Electric Co Ltd:The Method of cooling laser diode module and light source consisting thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002368326A (en) * 2001-06-05 2002-12-20 Furukawa Electric Co Ltd:The Method of cooling laser diode module and light source consisting thereof

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