KR950002394A - Impulse noise canceller of video signal - Google Patents

Impulse noise canceller of video signal Download PDF

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Publication number
KR950002394A
KR950002394A KR1019930011520A KR930011520A KR950002394A KR 950002394 A KR950002394 A KR 950002394A KR 1019930011520 A KR1019930011520 A KR 1019930011520A KR 930011520 A KR930011520 A KR 930011520A KR 950002394 A KR950002394 A KR 950002394A
Authority
KR
South Korea
Prior art keywords
noise
video signal
signal
pulse
detector
Prior art date
Application number
KR1019930011520A
Other languages
Korean (ko)
Inventor
음두찬
Original Assignee
김광호
삼성전자 주식회사
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 김광호, 삼성전자 주식회사 filed Critical 김광호
Priority to KR1019930011520A priority Critical patent/KR950002394A/en
Priority to JP6141527A priority patent/JPH0758984A/en
Publication of KR950002394A publication Critical patent/KR950002394A/en

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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
    • H04N5/213—Circuitry for suppressing or minimising impulsive noise

Abstract

본 발명은 영상신호를 임펄스성 노이즈를 제거하는 장치에 관한 것으로, 영상신호를 입력하여 화이트(white) 노이즈와 블랙(black) 노이즈를 검출하여 펄스신호를 출력하는 노이즈 검출기와 노이즈 검출기의 출력을 입력하여 소정의 시간만큼 펄스신호의 폭을 확장하여 원도우신호를 출력하는 펄스 확장기와 영상신호를 입력하여 윈도우신호에 따라 정상시에는 영상신호를 그대로 출력하고 노이즈가 검출되면 검출시의 영상레벨을 홀드하여 출력하는 트랙＆홀드회로를 구비하여 간단한 구성으로 영상신호에 포함된 임펄스 노이즈를 제거한다.The present invention relates to an apparatus for removing impulsive noise from an image signal, and inputs an output of a noise detector and an output of a noise detector to detect a white noise and a black noise by inputting the image signal and output a pulse signal. Input the video signal and pulse expander which outputs the window signal by extending the width of the pulse signal by a predetermined time, and outputs the video signal as it is in accordance with the window signal, and when the noise is detected, it holds the video level at detection An output track and hold circuit is provided to remove the impulse noise included in the video signal with a simple configuration.

Description

영상신호의 임펄스 노이즈 제거기Impulse noise canceller of video signal

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제3도는 본 발명에 의한 영상신호의 임펄스 노이즈 제거기를 도시한 블럭도, 제4A~D도는 제3도의 장치의 각 부분에서의 신호파형을 도시한 동작파형도, 제5A, B도는 제1도와 제3도의 트랙＆홀드회로의 동작을 설명하기 위하여 도시한 파형도, 제6도는 본 발명의 다른 실시예를 도시한 블럭도이다.FIG. 3 is a block diagram showing an impulse noise canceller of a video signal according to the present invention, and FIGS. 4A to D are operation waveform diagrams showing signal waveforms at respective parts of the apparatus of FIG. FIG. 6 is a waveform diagram for explaining the operation of the track and hold circuit of FIG. 3. FIG. 6 is a block diagram showing another embodiment of the present invention.

Claims (3)

영상신호의 노이즈 제거기에 있어서, 상기 영상신호를 입력하여 화이트(white) 노이즈와 블랙(black)노이즈를 검출하여 펄스신호를 출력하는 노이즈 검출기; 상기 노이즈 검출기의 출력을 입력하여 소정의 시간만큼 상기 펄스신호의 폭을 확장하여 원도우신호를 출력하는 펄스 확장기; 상기 영상신호를 입력하여 상기 윈도우신호에 따라 정상시에는 상기 영상신호를 그대로 출력하고 노이즈가 검출되면 상기 검출시의 영상 레벨을 홀드하여 출력하는 트랙＆ 홀드회로를 구비한 것을 특징으로 하는 영상신호의 임펄스 노이즈 제거기.A noise canceller of a video signal, comprising: a noise detector configured to input a video signal to detect white noise and black noise and output a pulse signal; A pulse expander for inputting an output of the noise detector to expand the width of the pulse signal by a predetermined time and outputting a window signal; And a track & hold circuit for inputting the video signal and outputting the video signal as it is in accordance with the window signal and holding and outputting the video level at the detection when noise is detected. Impulse noise canceller. 제1항에 있어서, 상기 노이즈 제거기는 상기 영상신호의 화이트(white) 레벨의 노이즈를 검출하는 화이트(white) 노이즈 검출기와 상기 영상신호의 블랙(black)레벨의 노이즈를 검출하는 블랙(black) 노이즈검출기를 구비한 것을 특징으로 하는 영상신호의 임펄스 노이즈 제거기.The noise canceling device of claim 1, wherein the noise canceller comprises a white noise detector for detecting a white level noise of the video signal and a black noise for detecting a black level noise of the video signal. An impulse noise canceller of a video signal comprising a detector. 영상신호의 노이즈 제거기에 있어서, 상기 영상신호의 화이트(white)레벨의 노이즈를 검출하여 펄스신호를 출력하는 화이트(white) 노이즈 검출기; 상기 화이트(white) 노이즈 검출기의 펄스신호를 입력하여 소정의 시간만큼 펄스폭을 확장하는 제1펄스 확장기; 상기 영상신호의 블랙(black)레벨의 노이즈를 검출하여 펄스신호를 출력하는 블랙(black) 노이즈 검출기; 상기 블랙(black) 노이즈 검출기의 펄스신호를 입력하여 소정의 시간만큼 펄스폭을 확장하는 제2펄스 확장기; 상기 영상신호를 입력하여 상기 제1펄스 확장기와 상기 제1펄스 확장기의 출력에 따라 정상시에는 상기 영상신호를 그대로 출력하고, 노이즈가 검출되면 상기 검출시의 영상레벨을 홀드하여 출력하는 트랙＆홀드회로를 구비한 것을 특징으로 하는 영상 신호의 임펄스 노이즈 제거기.A noise canceller of a video signal, comprising: a white noise detector for detecting a white level noise of the video signal and outputting a pulse signal; A first pulse expander configured to input a pulse signal of the white noise detector to extend a pulse width by a predetermined time; A black noise detector for detecting a black level noise of the video signal and outputting a pulse signal; A second pulse expander configured to expand a pulse width by a predetermined time by inputting a pulse signal of the black noise detector; The track & hold for inputting the video signal and outputting the video signal as it is in normal state according to the output of the first pulse expander and the first pulse expander, and holding and outputting the video level at the detection when noise is detected. And a circuit comprising an impulse noise canceller of the video signal. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930011520A 1993-06-23 1993-06-23 Impulse noise canceller of video signal KR950002394A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1019930011520A KR950002394A (en) 1993-06-23 1993-06-23 Impulse noise canceller of video signal
JP6141527A JPH0758984A (en) 1993-06-23 1994-06-23 Removal circuit of impulse noise of video signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930011520A KR950002394A (en) 1993-06-23 1993-06-23 Impulse noise canceller of video signal

Publications (1)

Publication Number Publication Date
KR950002394A true KR950002394A (en) 1995-01-04

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Application Number Title Priority Date Filing Date
KR1019930011520A KR950002394A (en) 1993-06-23 1993-06-23 Impulse noise canceller of video signal

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JP (1) JPH0758984A (en)
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Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4863626A (en) * 1971-12-06 1973-09-04
JPS4971822A (en) * 1972-11-10 1974-07-11
JPS5535901B2 (en) * 1972-12-25 1980-09-17
JPS5157209A (en) * 1974-11-15 1976-05-19 Hitachi Ltd
JPS5885680A (en) * 1981-11-17 1983-05-23 Matsushita Electric Ind Co Ltd Noise eliminating circuit
JPH0744472B2 (en) * 1984-11-22 1995-05-15 株式会社日立製作所 FM demodulation circuit
JP2548117B2 (en) * 1985-04-24 1996-10-30 松下電器産業株式会社 Video signal processing device
JPS61257081A (en) * 1985-05-10 1986-11-14 Matsushita Electric Ind Co Ltd Noise elimination circuit
JP3090670B2 (en) * 1989-11-21 2000-09-25 日本放送協会 Adaptive rank order filter device

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JPH0758984A (en) 1995-03-03

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