JPS5781780A - Facsimile communication system - Google Patents

Facsimile communication system

Info

Publication number
JPS5781780A
JPS5781780A JP55158707A JP15870780A JPS5781780A JP S5781780 A JPS5781780 A JP S5781780A JP 55158707 A JP55158707 A JP 55158707A JP 15870780 A JP15870780 A JP 15870780A JP S5781780 A JPS5781780 A JP S5781780A
Authority
JP
Japan
Prior art keywords
encoding
encoding mode
picture information
transmission controlling
modem
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
JP55158707A
Other languages
Japanese (ja)
Other versions
JPS6359582B2 (en
Inventor
Hideo Kasahara
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP55158707A priority Critical patent/JPS5781780A/en
Publication of JPS5781780A publication Critical patent/JPS5781780A/en
Publication of JPS6359582B2 publication Critical patent/JPS6359582B2/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

Landscapes

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

Abstract

PURPOSE:To eliminate the need for inversion of the transmitting priority at the time of transfer of picture information and for retraining, by installing a forward channel to be used for transferring the picture information and a backward channel to be used for monitoring conditions of the picture information. CONSTITUTION:An encoding section 104 is set to an one-dimensional encoding mode at an initial state. Whe encoding on the 1st line is completd at the encoding section 104, the mode is automatically switched to a two-dimensional sequential encoding mode, and encodings on pictures at and after the 2nd line are performed under the two-dimentional sequential encoding mode. Picture information thus encoded is given to a forward channel of an MODEM 102 through a buffer memory 103 based on the transmission controlling procedure of a transmission controlling section 105 under the control of the transmission controlling section 105, and the information is modulated by the MODEM 102. If an abnormality is reported at the transmission controlling section 102 at this time, designation for changing the encoding mode is issued through a backward channel of an MODEM 202 to request the one-dimentional encoding mode to the originating station.
JP55158707A 1980-11-11 1980-11-11 Facsimile communication system Granted JPS5781780A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55158707A JPS5781780A (en) 1980-11-11 1980-11-11 Facsimile communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55158707A JPS5781780A (en) 1980-11-11 1980-11-11 Facsimile communication system

Publications (2)

Publication Number Publication Date
JPS5781780A true JPS5781780A (en) 1982-05-21
JPS6359582B2 JPS6359582B2 (en) 1988-11-21

Family

ID=15677590

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55158707A Granted JPS5781780A (en) 1980-11-11 1980-11-11 Facsimile communication system

Country Status (1)

Country Link
JP (1) JPS5781780A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60199267A (en) * 1984-03-23 1985-10-08 Ricoh Co Ltd Facsimile equipment

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5361216A (en) * 1976-11-12 1978-06-01 Fujitsu Ltd Facsimile electric transmission system
JPS5443613A (en) * 1977-09-13 1979-04-06 Ricoh Co Ltd Data compression system
JPS5665564A (en) * 1979-11-02 1981-06-03 Ricoh Co Ltd Facsimile transmission method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5361216A (en) * 1976-11-12 1978-06-01 Fujitsu Ltd Facsimile electric transmission system
JPS5443613A (en) * 1977-09-13 1979-04-06 Ricoh Co Ltd Data compression system
JPS5665564A (en) * 1979-11-02 1981-06-03 Ricoh Co Ltd Facsimile transmission method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60199267A (en) * 1984-03-23 1985-10-08 Ricoh Co Ltd Facsimile equipment

Also Published As

Publication number Publication date
JPS6359582B2 (en) 1988-11-21

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