JPS5767376A - Subscanning method of facsimile - Google Patents

Subscanning method of facsimile

Info

Publication number
JPS5767376A
JPS5767376A JP14303180A JP14303180A JPS5767376A JP S5767376 A JPS5767376 A JP S5767376A JP 14303180 A JP14303180 A JP 14303180A JP 14303180 A JP14303180 A JP 14303180A JP S5767376 A JPS5767376 A JP S5767376A
Authority
JP
Japan
Prior art keywords
block
buffer memory
subscanning
driving
stored
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
JP14303180A
Other languages
Japanese (ja)
Other versions
JPS6028469B2 (en
Inventor
Ryota Suzuki
Hiroshi Ochi
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.)
NTT Inc
Original Assignee
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP14303180A priority Critical patent/JPS6028469B2/en
Publication of JPS5767376A publication Critical patent/JPS5767376A/en
Publication of JPS6028469B2 publication Critical patent/JPS6028469B2/en
Expired 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
    • H04N1/04—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

PURPOSE:To reduce the unevenness of transmission by selecting the driving speed of each divided block of subscanning in accordance with the number of encoded information, dividing also main scanning into plural blocks and synchronizing the driving of a subscanning block with the recording of a main scanning block. CONSTITUTION:An encoded signal is demodulated by a modulator and demodulator (MODEM)1, sent to a buffer memory 2 to store it and decoded by a decoding circuit 3. A buffer memory stored bit detecting circuit 7 detects the number of bits stored in the buffer memory 2 at the completion of driving of the preceeding block and sends a buffer memory stored bit signal 9 representing the number of detected bits to a subscanning control circuit 8. The subscanning control circuit 8 selects the driving speed of the succeeding block, the same as the preceding block, slower by one step or faster by one step, on the basis of the compared result between the number of stored bits previously set up in the buffer memory 2 and the number of encoded bits stored in the buffer memory 2, and also synchronizes the driving pulse of each subscanning block with the recording timing of each main scanning block.
JP14303180A 1980-10-15 1980-10-15 Facsimile sub-scanning method Expired JPS6028469B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14303180A JPS6028469B2 (en) 1980-10-15 1980-10-15 Facsimile sub-scanning method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14303180A JPS6028469B2 (en) 1980-10-15 1980-10-15 Facsimile sub-scanning method

Publications (2)

Publication Number Publication Date
JPS5767376A true JPS5767376A (en) 1982-04-23
JPS6028469B2 JPS6028469B2 (en) 1985-07-04

Family

ID=15329292

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14303180A Expired JPS6028469B2 (en) 1980-10-15 1980-10-15 Facsimile sub-scanning method

Country Status (1)

Country Link
JP (1) JPS6028469B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61255157A (en) * 1985-05-07 1986-11-12 Seiko Instr & Electronics Ltd Raster type recording device
JPS62216585A (en) * 1986-03-18 1987-09-24 Nec Corp Facsimile receiver
US5175632A (en) * 1990-10-10 1992-12-29 Fuji Xerox Co., Ltd. Multiple image processing system
JPH0584978A (en) * 1991-09-30 1993-04-06 Tokyo Electric Co Ltd Recording device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61255157A (en) * 1985-05-07 1986-11-12 Seiko Instr & Electronics Ltd Raster type recording device
JPS62216585A (en) * 1986-03-18 1987-09-24 Nec Corp Facsimile receiver
US5175632A (en) * 1990-10-10 1992-12-29 Fuji Xerox Co., Ltd. Multiple image processing system
JPH0584978A (en) * 1991-09-30 1993-04-06 Tokyo Electric Co Ltd Recording device

Also Published As

Publication number Publication date
JPS6028469B2 (en) 1985-07-04

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