JPS5871764A - Subscan controlling method for facsimile or the like using redundancy suppressing and coding system - Google Patents

Subscan controlling method for facsimile or the like using redundancy suppressing and coding system

Info

Publication number
JPS5871764A
JPS5871764A JP17118781A JP17118781A JPS5871764A JP S5871764 A JPS5871764 A JP S5871764A JP 17118781 A JP17118781 A JP 17118781A JP 17118781 A JP17118781 A JP 17118781A JP S5871764 A JPS5871764 A JP S5871764A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
line
memory
vnext
vj
lm
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
JP17118781A
Other versions
JPS6020950B2 (en )
Inventor
Makoto Matsuki
Ryota Suzuki
Original Assignee
Nippon Telegr & Teleph Corp <Ntt>
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

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/17Scanning 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

Abstract

PURPOSE:To realize a subscan controlling method which cannt be stopped emergently with only a small capacity of a line memory, by controlling selectively the subscanning speed in accordance with the volume of picture signals stored in the line memory. CONSTITUTION:The information fed through an incoming path 1 of picture signals whose redundancy is suppressed and coded is stored in a buffer memory 2 and then converted into the information of 1 line through a decoder 3 to be stored in a line memory 4. The 1-line information of the memory 4 is recorded by a recording circuit 6. The subscanning speed is controlled by a subscanning speed control part 7 every time a line is recorded. In this case, the next subscanning speed VNEXT is decided as VNEXT=Vj+1, VNEXT=Vj and VNEXT=Vj-1 in the case of LM>j, LM=j and LM<j, respectively, where LM is the line memory capacity detected by a line memory capacity detecting part 5 and Vj is the present subscanning speed. In such way, the feed variance due to the variation of speed can be reduced since the subscanning speed is varied by one step. Furthermore, the scanning can be stopped at the minimum subscanning speed even in an emergent stop mode and when the memory 4 is free.
JP17118781A 1981-10-26 1981-10-26 Expired JPS6020950B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17118781A JPS6020950B2 (en) 1981-10-26 1981-10-26

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17118781A JPS6020950B2 (en) 1981-10-26 1981-10-26

Publications (2)

Publication Number Publication Date
JPS5871764A true true JPS5871764A (en) 1983-04-28
JPS6020950B2 JPS6020950B2 (en) 1985-05-24

Family

ID=15918610

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17118781A Expired JPS6020950B2 (en) 1981-10-26 1981-10-26

Country Status (1)

Country Link
JP (1) JPS6020950B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5032929A (en) * 1988-04-25 1991-07-16 Fujitsu Limited Document reading device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5032929A (en) * 1988-04-25 1991-07-16 Fujitsu Limited Document reading device

Also Published As

Publication number Publication date Type
JP1297833C (en) grant
JPS6020950B2 (en) 1985-05-24 grant

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