JPS57210406A - Noise reduction circuit - Google Patents

Noise reduction circuit

Info

Publication number
JPS57210406A
JPS57210406A JP56094671A JP9467181A JPS57210406A JP S57210406 A JPS57210406 A JP S57210406A JP 56094671 A JP56094671 A JP 56094671A JP 9467181 A JP9467181 A JP 9467181A JP S57210406 A JPS57210406 A JP S57210406A
Authority
JP
Japan
Prior art keywords
signal
component
noise component
adder
high frequency
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
JP56094671A
Other languages
Japanese (ja)
Other versions
JPS634754B2 (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 JP56094671A priority Critical patent/JPS57210406A/en
Priority to US06/389,041 priority patent/US4563704A/en
Priority to FR8210716A priority patent/FR2508261B1/en
Priority to KR1019820002713A priority patent/KR840001034A/en
Priority to GB08217850A priority patent/GB2104338B/en
Priority to DE3223066A priority patent/DE3223066C2/en
Publication of JPS57210406A publication Critical patent/JPS57210406A/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 JPS634754B2 publication Critical patent/JPS634754B2/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

Abstract

PURPOSE:To remove a noise component shortely after a signal rises, by subtracting a separated high frequency component from an information signal, and thus obtaining information 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 is delayed by rising time (0.5-2musec) through a delay circuit 8, and a low-pass filter 6 removes a high frequency component containing the noise component to obtain a signal (c), which is supplied to an adder 7 with the opposite phase. Then, a limiter 8 limits the amplitude of only a large amplitude signal component to output only a small amplitude component or the noise component to an adder 4. The adder 4 subtracts the noise component of the output of the limiter 9 from the signal (a), so that a signal (d) removed from the noise component appears at an output terminal 5.
JP56094671A 1981-06-19 1981-06-19 Noise reduction circuit Granted JPS57210406A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
JP56094671A JPS57210406A (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
FR8210716A FR2508261B1 (en) 1981-06-19 1982-06-18 NOISE REDUCTION CIRCUIT FOR VIDEO SIGNALS
KR1019820002713A KR840001034A (en) 1981-06-19 1982-06-18 Noise reduction circuit
DE3223066A DE3223066C2 (en) 1981-06-19 1982-06-21 Noise reduction circuit
GB08217850A GB2104338B (en) 1981-06-19 1982-06-21 Noise reduction circuit for a video signal
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
JP56094671A JPS57210406A (en) 1981-06-19 1981-06-19 Noise reduction circuit

Publications (2)

Publication Number Publication Date
JPS57210406A true JPS57210406A (en) 1982-12-24
JPS634754B2 JPS634754B2 (en) 1988-01-30

Family

ID=14116695

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56094671A Granted JPS57210406A (en) 1981-06-19 1981-06-19 Noise reduction circuit

Country Status (1)

Country Link
JP (1) JPS57210406A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61159876A (en) * 1984-12-29 1986-07-19 Victor Co Of Japan Ltd Noise elimination circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61159876A (en) * 1984-12-29 1986-07-19 Victor Co Of Japan Ltd Noise elimination circuit

Also Published As

Publication number Publication date
JPS634754B2 (en) 1988-01-30

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