JPS55150669A - Noise eliminating circuit - Google Patents

Noise eliminating circuit

Info

Publication number
JPS55150669A
JPS55150669A JP5889079A JP5889079A JPS55150669A JP S55150669 A JPS55150669 A JP S55150669A JP 5889079 A JP5889079 A JP 5889079A JP 5889079 A JP5889079 A JP 5889079A JP S55150669 A JPS55150669 A JP S55150669A
Authority
JP
Japan
Prior art keywords
circuit
signal
att
terminal
noise
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
JP5889079A
Other languages
Japanese (ja)
Other versions
JPS6258191B2 (en
Inventor
Takafumi Okada
Yutaka Tanaka
Atsushi Matsuzaki
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP5889079A priority Critical patent/JPS55150669A/en
Publication of JPS55150669A publication Critical patent/JPS55150669A/en
Publication of JPS6258191B2 publication Critical patent/JPS6258191B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Synchronizing For Television (AREA)
  • Picture Signal Circuits (AREA)

Abstract

PURPOSE:To improve S/N of signals having vertical correlation, by cascading the first attenuator ATT circuit, a one-horizontal period delay circuit, and the second ATT circuit and by connecting the output of the second ATT circuit and the input of the delay circuit. CONSTITUTION:ATT circuit 2 which multiplies a signal level by factor (1-alpha) (0<alpha<1), delay circuit 3 which has gain 1 and delays a signal by the one-horizontal period, and ATT circuit 4 which multiplies a signal level by factor alpha are cascaded to input terminal 1 of the video signal, and the output of circuit 4 is connected to the input of circuit 3. In this constitution, if video signal Vi(n) supplied to terminal 1 has vertical correlation, this signal is taken out to terminal 5 as signal V0(n) of the same level. Meanwhile, when noise is supplied to terminal 1, noise is attenuated because noise is random and has no vertical correlation. Consequently, signals having vertical correlation such as the synchronizing pulse and the burst signal have the S/N improved.
JP5889079A 1979-05-14 1979-05-14 Noise eliminating circuit Granted JPS55150669A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5889079A JPS55150669A (en) 1979-05-14 1979-05-14 Noise eliminating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5889079A JPS55150669A (en) 1979-05-14 1979-05-14 Noise eliminating circuit

Publications (2)

Publication Number Publication Date
JPS55150669A true JPS55150669A (en) 1980-11-22
JPS6258191B2 JPS6258191B2 (en) 1987-12-04

Family

ID=13097369

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5889079A Granted JPS55150669A (en) 1979-05-14 1979-05-14 Noise eliminating circuit

Country Status (1)

Country Link
JP (1) JPS55150669A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5844866A (en) * 1981-09-11 1983-03-15 Hitachi Denshi Ltd Solid-state television camera device
JPS6278974A (en) * 1985-10-02 1987-04-11 Victor Co Of Japan Ltd Noise reducing circuit for video signal
US4684976A (en) * 1985-04-18 1987-08-04 Mitsubishi Denki Kabushiki Kaisha Feedback comb-type filter
JPS62269574A (en) * 1986-05-19 1987-11-24 Nec Home Electronics Ltd Cyclic type noise reduction device
JPS62281681A (en) * 1986-05-30 1987-12-07 Nec Home Electronics Ltd Cycice type noise reducing device
US4888642A (en) * 1987-11-07 1989-12-19 Mitsubishi Denki Kabushiki Kaisha Video signal processor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5844866A (en) * 1981-09-11 1983-03-15 Hitachi Denshi Ltd Solid-state television camera device
US4684976A (en) * 1985-04-18 1987-08-04 Mitsubishi Denki Kabushiki Kaisha Feedback comb-type filter
JPS6278974A (en) * 1985-10-02 1987-04-11 Victor Co Of Japan Ltd Noise reducing circuit for video signal
JPS62269574A (en) * 1986-05-19 1987-11-24 Nec Home Electronics Ltd Cyclic type noise reduction device
JPS62281681A (en) * 1986-05-30 1987-12-07 Nec Home Electronics Ltd Cycice type noise reducing device
US4888642A (en) * 1987-11-07 1989-12-19 Mitsubishi Denki Kabushiki Kaisha Video signal processor

Also Published As

Publication number Publication date
JPS6258191B2 (en) 1987-12-04

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