JPS5669968A - Facsimile equipment - Google Patents

Facsimile equipment

Info

Publication number
JPS5669968A
JPS5669968A JP14602379A JP14602379A JPS5669968A JP S5669968 A JPS5669968 A JP S5669968A JP 14602379 A JP14602379 A JP 14602379A JP 14602379 A JP14602379 A JP 14602379A JP S5669968 A JPS5669968 A JP S5669968A
Authority
JP
Japan
Prior art keywords
recording
lines
reading
buffers
buffer memory
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
JP14602379A
Other languages
Japanese (ja)
Inventor
Mitsuru Kondo
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 JP14602379A priority Critical patent/JPS5669968A/en
Publication of JPS5669968A publication Critical patent/JPS5669968A/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
    • H04N1/411—Bandwidth or redundancy reduction for the transmission or storage or reproduction of two-tone pictures, e.g. black and white pictures
    • H04N1/413—Systems or arrangements allowing the picture to be reproduced without loss or modification of picture-information

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Storing Facsimile Image Data (AREA)
  • Fax Reproducing Arrangements (AREA)

Abstract

PURPOSE:To reduce the capacity of a buffer memory by equally dividing a buffer memory by three for facsimile, by pairing two parts for a recording part and read part and by using them for a data compression/expansion part sequentially by turns. CONSTITUTION:Of the facsimile equipment that scans 32 lines simultaneously, the 48-line buffer is equally divided by three. For a one-way scan, two parts (e.g. buffers A and B) are paired and connected to recording part WE (or read part) by switch SWII to perform recording (or reading) for 32 lines, and the remaining one part (e.g. buffer C) is connected to data compression/expansion part DCR by switch SWI for recording (or reading) for 16 lines. For a return scan, either of buffers A and B is connected to DCR to perform recording (or reading) for 16 lines. Therefore, the capacity of the buffer memory can be reduced in comparison with the conventional system that use two 32-line buffers by turns.
JP14602379A 1979-11-13 1979-11-13 Facsimile equipment Pending JPS5669968A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14602379A JPS5669968A (en) 1979-11-13 1979-11-13 Facsimile equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14602379A JPS5669968A (en) 1979-11-13 1979-11-13 Facsimile equipment

Publications (1)

Publication Number Publication Date
JPS5669968A true JPS5669968A (en) 1981-06-11

Family

ID=15398346

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14602379A Pending JPS5669968A (en) 1979-11-13 1979-11-13 Facsimile equipment

Country Status (1)

Country Link
JP (1) JPS5669968A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61161070A (en) * 1985-01-08 1986-07-21 Fuji Xerox Co Ltd Image data storage device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61161070A (en) * 1985-01-08 1986-07-21 Fuji Xerox Co Ltd Image data storage device

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