JPS55149569A - Control signal transmission method in facsimile - Google Patents

Control signal transmission method in facsimile

Info

Publication number
JPS55149569A
JPS55149569A JP5832879A JP5832879A JPS55149569A JP S55149569 A JPS55149569 A JP S55149569A JP 5832879 A JP5832879 A JP 5832879A JP 5832879 A JP5832879 A JP 5832879A JP S55149569 A JPS55149569 A JP S55149569A
Authority
JP
Japan
Prior art keywords
circuit
register
control signal
video signal
signal
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.)
Granted
Application number
JP5832879A
Other languages
Japanese (ja)
Other versions
JPS6240900B2 (en
Inventor
Masao Tanaka
Mitsuo Satomi
Hiroshi Kuramoto
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.)
JUJO ENG CO Ltd
JUJO ENG KK
Original Assignee
JUJO ENG CO Ltd
JUJO ENG KK
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 JUJO ENG CO Ltd, JUJO ENG KK filed Critical JUJO ENG CO Ltd
Priority to JP5832879A priority Critical patent/JPS55149569A/en
Priority to DE19803017938 priority patent/DE3017938A1/en
Priority to GB8015489A priority patent/GB2049350B/en
Priority to FR8010381A priority patent/FR2456440A1/en
Publication of JPS55149569A publication Critical patent/JPS55149569A/en
Publication of JPS6240900B2 publication Critical patent/JPS6240900B2/ja
Granted 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
    • H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N1/36—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device for synchronising or phasing transmitter and receiver
    • 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
    • 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
    • H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N1/333—Mode signalling or mode changing; Handshaking therefor
    • H04N1/3333—Mode signalling or mode changing; Handshaking therefor during transmission, input or output of the picture signal; within a single document or page
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N2201/333—Mode signalling or mode changing; Handshaking therefor
    • H04N2201/33307—Mode signalling or mode changing; Handshaking therefor of a particular mode
    • H04N2201/33314—Mode signalling or mode changing; Handshaking therefor of a particular mode of reading or reproducing mode
    • H04N2201/33328—Resolution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N2201/333—Mode signalling or mode changing; Handshaking therefor
    • H04N2201/33307—Mode signalling or mode changing; Handshaking therefor of a particular mode
    • H04N2201/33342—Mode signalling or mode changing; Handshaking therefor of a particular mode of transmission mode
    • H04N2201/3335—Speed or rate

Landscapes

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

Abstract

PURPOSE: To increase the reliability of control signal discrimination and to ensure the phase lock, by taking longer the phase signal transmission period, transmitting the line density control signal during this period and leaving the carrier components.
CONSTITUTION: The signal of one line's share from the scanner 4 is alternately stored in the shift registers 5, 6 with the switch 9. When the readout of the register 5 is made, the video signal of the register 6 is input to the line density discrimination circuit 7, the presence of black information is discriminated, the result is input to the control circuit 8 and stored. After the end of readout of the register 5, the control signal reading out the video signal from the register 6 shorter in case of the absence of black information and longer with the presence, is transmitted to the reception side. Thus, the circuit 8 controls the clocks 11, 12, changes the frequency and sets the readout time and the video signal is output via the modulation circuit 13. Further, the switch 14 turns off, 15 is turned on, and the carrier 18 having the amplitude determined with the resistors R1, R2 and voltage Vc is transmitted via the circuit 13 during the period when the video signal is absent. Thus, the synchronism is kept at the reception side and the line density toward sub-scanning can be selected and received.
COPYRIGHT: (C)1980,JPO&Japio
JP5832879A 1979-05-11 1979-05-11 Control signal transmission method in facsimile Granted JPS55149569A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP5832879A JPS55149569A (en) 1979-05-11 1979-05-11 Control signal transmission method in facsimile
DE19803017938 DE3017938A1 (en) 1979-05-11 1980-05-09 METHOD AND CIRCUIT FOR TRANSMITTING CONTROL SIGNALS IN A FACSIMILE TELEGRAPH
GB8015489A GB2049350B (en) 1979-05-11 1980-05-09 Method of transmitting facsimile control signals
FR8010381A FR2456440A1 (en) 1979-05-11 1980-05-09 METHOD FOR TRANSMITTING CONTROL SIGNALS FOR FAC-SIMILE TELEGRAPHY

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5832879A JPS55149569A (en) 1979-05-11 1979-05-11 Control signal transmission method in facsimile

Publications (2)

Publication Number Publication Date
JPS55149569A true JPS55149569A (en) 1980-11-20
JPS6240900B2 JPS6240900B2 (en) 1987-08-31

Family

ID=13081221

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5832879A Granted JPS55149569A (en) 1979-05-11 1979-05-11 Control signal transmission method in facsimile

Country Status (4)

Country Link
JP (1) JPS55149569A (en)
DE (1) DE3017938A1 (en)
FR (1) FR2456440A1 (en)
GB (1) GB2049350B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5940769A (en) * 1982-08-30 1984-03-06 Fujitsu Ltd Facsimile transmission control system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54110718A (en) * 1978-02-17 1979-08-30 Nippon Telegr & Teleph Corp <Ntt> Facsimile signal transmission/reception method

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1180819A (en) * 1966-10-03 1970-02-11 Nippon Electric Co Improvements in or relating to Phototelegraph Receivers.
US3670099A (en) * 1968-03-18 1972-06-13 Itek Corp Facsimile system utilizing pre-scan detection of indicia
US3955045A (en) * 1974-03-08 1976-05-04 Exxon Research And Engineering Company Method and apparatus for time compression of facsimile transmissions
US4130839A (en) * 1977-09-12 1978-12-19 Minnesota Mining And Manufacturing Company Circuitry for a facsimile receiver for regeneration of carrier for an amplitude modulated suppressed carrier signal

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54110718A (en) * 1978-02-17 1979-08-30 Nippon Telegr & Teleph Corp <Ntt> Facsimile signal transmission/reception method

Also Published As

Publication number Publication date
JPS6240900B2 (en) 1987-08-31
GB2049350A (en) 1980-12-17
DE3017938A1 (en) 1980-11-13
FR2456440A1 (en) 1980-12-05
GB2049350B (en) 1984-03-28

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