JPS57210405A - Noise reduction circuit - Google Patents

Noise reduction circuit

Info

Publication number
JPS57210405A
JPS57210405A JP56094670A JP9467081A JPS57210405A JP S57210405 A JPS57210405 A JP S57210405A JP 56094670 A JP56094670 A JP 56094670A JP 9467081 A JP9467081 A JP 9467081A JP S57210405 A JPS57210405 A JP S57210405A
Authority
JP
Japan
Prior art keywords
signal
adder
component
noise
frequency component
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
JP56094670A
Other languages
Japanese (ja)
Other versions
JPS634753B2 (en
Inventor
Akira Hirota
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.)
Victor Company of Japan Ltd
Nippon Victor KK
Original Assignee
Victor Company of Japan Ltd
Nippon Victor 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 Victor Company of Japan Ltd, Nippon Victor KK filed Critical Victor Company of Japan Ltd
Priority to JP56094670A priority Critical patent/JPS57210405A/en
Priority to US06/389,041 priority patent/US4563704A/en
Priority to KR1019820002713A priority patent/KR840001034A/en
Priority to FR8210716A priority patent/FR2508261B1/en
Priority to DE3223066A priority patent/DE3223066C2/en
Priority to GB08217850A priority patent/GB2104338B/en
Publication of JPS57210405A publication Critical patent/JPS57210405A/en
Priority to KR2019870010200U priority patent/KR870003487Y1/en
Priority to KR2019870010865U priority patent/KR870003488Y1/en
Priority to MY309/87A priority patent/MY8700309A/en
Publication of JPS634753B2 publication Critical patent/JPS634753B2/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
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/911—Television signal processing therefor for the suppression of noise
    • 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)
  • Picture Signal Circuits (AREA)
  • Television Signal Processing For Recording (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)

Abstract

PURPOSE:To remove a noise component right after a signal rises, by subtracting a separated high frequency component from an information delay signal, and thus obtaining an information signal removed from the high frequency component. CONSTITUTION:An FM-demodulated playback luminance signal (a) which contains a noise component arrives at an input terminal 1 and passes through a low-pass filter 6 to remove a high frequency component containing the noise component, and the resulting signal (b) is supplied to an adder 7 with the opposite phase. Then, the signal (a) passed through a delay circuit 8 has the same extent of delay (0.5-2musec) with the rising time of the low-pass filter 6 and is supplied to the adder 7 as an in-phase signal (c). The adder 7 subtracts the signal (b) from the signal (c) to extract only a hgh frequency component, and a limiter 9 limits only a large amplitude component, or a signal component to output only a noise component to an adder 4. Since the adder 7 subtracts the complete rising high-level signal of the signal (b) from the signal (c), the noise compnent shortly after the rising is removed.
JP56094670A 1981-06-19 1981-06-19 Noise reduction circuit Granted JPS57210405A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
JP56094670A JPS57210405A (en) 1981-06-19 1981-06-19 Noise reduction circuit
US06/389,041 US4563704A (en) 1981-06-19 1982-06-16 Noise reduction circuit for a video signal
KR1019820002713A KR840001034A (en) 1981-06-19 1982-06-18 Noise reduction circuit
FR8210716A FR2508261B1 (en) 1981-06-19 1982-06-18 NOISE REDUCTION CIRCUIT FOR VIDEO SIGNALS
GB08217850A GB2104338B (en) 1981-06-19 1982-06-21 Noise reduction circuit for a video signal
DE3223066A DE3223066C2 (en) 1981-06-19 1982-06-21 Noise reduction circuit
KR2019870010200U KR870003487Y1 (en) 1981-06-19 1987-06-25 Noise reduced circuit
KR2019870010865U KR870003488Y1 (en) 1981-06-19 1987-07-03 Noise reduced circuit
MY309/87A MY8700309A (en) 1981-06-19 1987-12-30 Noise reduction circuit for a video signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56094670A JPS57210405A (en) 1981-06-19 1981-06-19 Noise reduction circuit

Publications (2)

Publication Number Publication Date
JPS57210405A true JPS57210405A (en) 1982-12-24
JPS634753B2 JPS634753B2 (en) 1988-01-30

Family

ID=14116668

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56094670A Granted JPS57210405A (en) 1981-06-19 1981-06-19 Noise reduction circuit

Country Status (1)

Country Link
JP (1) JPS57210405A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4768094A (en) * 1985-08-30 1988-08-30 Victor Company Of Japan, Ltd. Noise suppressing circuit with gain control
JPH04973A (en) * 1990-04-18 1992-01-06 Mitsubishi Electric Corp Video signal processor

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01145542U (en) * 1988-03-14 1989-10-06
JPH0612199U (en) * 1992-10-16 1994-02-15 アイシン精機株式会社 Vehicle interior imaging device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4768094A (en) * 1985-08-30 1988-08-30 Victor Company Of Japan, Ltd. Noise suppressing circuit with gain control
JPH04973A (en) * 1990-04-18 1992-01-06 Mitsubishi Electric Corp Video signal processor

Also Published As

Publication number Publication date
JPS634753B2 (en) 1988-01-30

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