JPS5772469A - Binary circuit in facsimile - Google Patents

Binary circuit in facsimile

Info

Publication number
JPS5772469A
JPS5772469A JP54122203A JP12220379A JPS5772469A JP S5772469 A JPS5772469 A JP S5772469A JP 54122203 A JP54122203 A JP 54122203A JP 12220379 A JP12220379 A JP 12220379A JP S5772469 A JPS5772469 A JP S5772469A
Authority
JP
Japan
Prior art keywords
diode
slice level
speed
black
larger
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
JP54122203A
Other languages
Japanese (ja)
Other versions
JPS6343945B2 (en
Inventor
Makoto Yamamoto
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.)
JIYUUJIYOU ENGINEERING KK
JUJO ENG CO Ltd
JUJO ENG KK
Original Assignee
JIYUUJIYOU ENGINEERING KK
JUJO ENG CO Ltd
JUJO ENG KK
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 JIYUUJIYOU ENGINEERING KK, JUJO ENG CO Ltd, JUJO ENG KK filed Critical JIYUUJIYOU ENGINEERING KK
Priority to JP54122203A priority Critical patent/JPS5772469A/en
Publication of JPS5772469A publication Critical patent/JPS5772469A/en
Publication of JPS6343945B2 publication Critical patent/JPS6343945B2/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
    • H04N1/40—Picture signal circuits
    • H04N1/403—Discrimination between the two tones in the picture signal of a two-tone original

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Manipulation Of Pulses (AREA)

Abstract

PURPOSE:To transmit a binary signal faithful to the original, by making the speed of reset of a slice level at the point for change from black to white of the picture signal higher than the speed of drop of the slice level at the point for change from white to black in the picture signal. CONSTITUTION:A slice level determining circuit 19 consists of a clamp circuit 17, which consists of resistances R1-R4, a capacitor C2, a charging diode D1, a discharging diode D2, and a diode D3 for input of a set value, and an integrator 18. A picture signal L1 and a slice level signal L2 are inputted to a comparator 8 to discriminate white or black. If R2/R1=R4/R3 is trure when resistances R1 and R2 have resistance values very larger than those of R3 and R4, a current I1 flowed to the diode D1 is larger than a current I2 flowed to the diode D2, and the time constant is larger. Thus, the speed of charging of the capacitor C2 is higher than the speed of discharging sufficiently, and the reset of the slice level is rapider.
JP54122203A 1979-09-21 1979-09-21 Binary circuit in facsimile Granted JPS5772469A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54122203A JPS5772469A (en) 1979-09-21 1979-09-21 Binary circuit in facsimile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54122203A JPS5772469A (en) 1979-09-21 1979-09-21 Binary circuit in facsimile

Publications (2)

Publication Number Publication Date
JPS5772469A true JPS5772469A (en) 1982-05-06
JPS6343945B2 JPS6343945B2 (en) 1988-09-01

Family

ID=14830101

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54122203A Granted JPS5772469A (en) 1979-09-21 1979-09-21 Binary circuit in facsimile

Country Status (1)

Country Link
JP (1) JPS5772469A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01145530U (en) * 1988-03-15 1989-10-06
JPH0522936U (en) * 1991-04-12 1993-03-26 デルタ工業株式会社 Shift lock device for automobile chain lever

Also Published As

Publication number Publication date
JPS6343945B2 (en) 1988-09-01

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