JPS5664557A - High-speed facsimile device - Google Patents

High-speed facsimile device

Info

Publication number
JPS5664557A
JPS5664557A JP13929379A JP13929379A JPS5664557A JP S5664557 A JPS5664557 A JP S5664557A JP 13929379 A JP13929379 A JP 13929379A JP 13929379 A JP13929379 A JP 13929379A JP S5664557 A JPS5664557 A JP S5664557A
Authority
JP
Japan
Prior art keywords
main memory
access
scanner
area
compressed
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
JP13929379A
Other languages
Japanese (ja)
Inventor
Masaaki Mori
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP13929379A priority Critical patent/JPS5664557A/en
Publication of JPS5664557A publication Critical patent/JPS5664557A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Storing Facsimile Image Data (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

PURPOSE:To simplify the control system of the main memory, by providing two main memory areas having the fixed capacity of the main memory and thus securing the access direction of the main memory set to two ways at one time. CONSTITUTION:The data of the original read by the scanner S is compressed by the data compression circuit DC, and an access is given to the main memory area ME1 within the time of the return signal of the scanner S to store temporarily the compressed data equivalent to one page. Then the scanner S is reset to its original state, and the picture information of the 2nd page is read and compressed. Then an access is given to the area ME1. Simultaneously with this access, an access is given to the secondary memory M2. Thus the data of the 1st page in the area ME1 is transferred to the memory M2. The compressed data stored in the memory M2 is transmitted within the return time of the scanner S to the communication circuit via the main memory area ME2 and the communication control unit CCU each.
JP13929379A 1979-10-30 1979-10-30 High-speed facsimile device Pending JPS5664557A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13929379A JPS5664557A (en) 1979-10-30 1979-10-30 High-speed facsimile device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13929379A JPS5664557A (en) 1979-10-30 1979-10-30 High-speed facsimile device

Publications (1)

Publication Number Publication Date
JPS5664557A true JPS5664557A (en) 1981-06-01

Family

ID=15241900

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13929379A Pending JPS5664557A (en) 1979-10-30 1979-10-30 High-speed facsimile device

Country Status (1)

Country Link
JP (1) JPS5664557A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6051072A (en) * 1983-08-30 1985-03-22 Canon Inc Picture processing method
EP0443247A2 (en) * 1990-02-23 1991-08-28 Canon Kabushiki Kaisha Image communicating apparatus
US5175566A (en) * 1990-02-23 1992-12-29 Canon Kabushiki Kaisha Image communicating apparatus with ink jet printer having controlled capping operation
US5777633A (en) * 1990-02-23 1998-07-07 Canon Kabushiki Kaisha Image communicating apparatus with ink jet printer having controlled capping operation

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6051072A (en) * 1983-08-30 1985-03-22 Canon Inc Picture processing method
EP0443247A2 (en) * 1990-02-23 1991-08-28 Canon Kabushiki Kaisha Image communicating apparatus
US5175566A (en) * 1990-02-23 1992-12-29 Canon Kabushiki Kaisha Image communicating apparatus with ink jet printer having controlled capping operation
US5777633A (en) * 1990-02-23 1998-07-07 Canon Kabushiki Kaisha Image communicating apparatus with ink jet printer having controlled capping operation

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