JPS54110718A - Facsimile signal transmission/reception method - Google Patents

Facsimile signal transmission/reception method

Info

Publication number
JPS54110718A
JPS54110718A JP1794678A JP1794678A JPS54110718A JP S54110718 A JPS54110718 A JP S54110718A JP 1794678 A JP1794678 A JP 1794678A JP 1794678 A JP1794678 A JP 1794678A JP S54110718 A JPS54110718 A JP S54110718A
Authority
JP
Japan
Prior art keywords
signal
information
picture
compression
phase
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
JP1794678A
Other languages
Japanese (ja)
Other versions
JPS6255343B2 (en
Inventor
Hironari Inagaki
Jinichi Tomomune
Yoshiyuki Aida
Yasuyuki Kojima
Masayoshi Sunada
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
Nippon Telegraph and Telephone Corp
Panasonic System Solutions Japan Co Ltd
Original Assignee
Matsushita Graphic Communication Systems Inc
Hitachi Ltd
Nippon Telegraph and Telephone Corp
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 Matsushita Graphic Communication Systems Inc, Hitachi Ltd, Nippon Telegraph and Telephone Corp filed Critical Matsushita Graphic Communication Systems Inc
Priority to JP1794678A priority Critical patent/JPS54110718A/en
Publication of JPS54110718A publication Critical patent/JPS54110718A/en
Publication of JPS6255343B2 publication Critical patent/JPS6255343B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Facsimile Scanning Arrangements (AREA)
  • Facsimile Transmission Control (AREA)

Abstract

PURPOSE: To ensure an highly effective transmission with no contamination given to the picture signal by compounding the control signal showing the degree of compression of the scanning line and the pilot signal showing a fixed period within the phase section via the information decision signal and the output of the memory circuit and then transmitting the composite signal.
CONSTITUTION: The 1-line picture information is read out from photoelectric conversion circuit 2 at the start of the phase period, and the inquiry is given to information quantity decision circuit 4 from phase generating circuit 1 at the terminating point of the phase period whether it is PSL containing the black signal line or NSL containing no black signal. Then the control signal showing the degree of compression of the scanning line is compounded (5) with pilot signal PSiG via information decision signal CSiG and the output of memory circuit 3, and then transmitted after modulation 6 to be received at the receiver side for demodulation. In such way, the scanning line is compressed in case the quantity of the transmission picture information is small, and the control signal showing the compression is transmitted to control the scanning of the receiver side. As a result, a highly effective transmission is ensured with no contamination of the reception picture.
COPYRIGHT: (C)1979,JPO&Japio
JP1794678A 1978-02-17 1978-02-17 Facsimile signal transmission/reception method Granted JPS54110718A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1794678A JPS54110718A (en) 1978-02-17 1978-02-17 Facsimile signal transmission/reception method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1794678A JPS54110718A (en) 1978-02-17 1978-02-17 Facsimile signal transmission/reception method

Publications (2)

Publication Number Publication Date
JPS54110718A true JPS54110718A (en) 1979-08-30
JPS6255343B2 JPS6255343B2 (en) 1987-11-19

Family

ID=11957933

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1794678A Granted JPS54110718A (en) 1978-02-17 1978-02-17 Facsimile signal transmission/reception method

Country Status (1)

Country Link
JP (1) JPS54110718A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55149569A (en) * 1979-05-11 1980-11-20 Jujo Eng Kk Control signal transmission method in facsimile

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5280713A (en) * 1975-12-26 1977-07-06 Nippon Telegr & Teleph Corp <Ntt> Facsimile transmission system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5280713A (en) * 1975-12-26 1977-07-06 Nippon Telegr & Teleph Corp <Ntt> Facsimile transmission system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55149569A (en) * 1979-05-11 1980-11-20 Jujo Eng Kk Control signal transmission method in facsimile
JPS6240900B2 (en) * 1979-05-11 1987-08-31 Murata Machinery Ltd

Also Published As

Publication number Publication date
JPS6255343B2 (en) 1987-11-19

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