KR940017731A - Noise canceller of digital video signal - Google Patents

Noise canceller of digital video signal Download PDF

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KR940017731A
KR940017731A KR1019920025635A KR920025635A KR940017731A KR 940017731 A KR940017731 A KR 940017731A KR 1019920025635 A KR1019920025635 A KR 1019920025635A KR 920025635 A KR920025635 A KR 920025635A KR 940017731 A KR940017731 A KR 940017731A
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signal
video signal
output
comparator
maximum
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KR0135863B1 (en
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황덕원
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윤종용
삼성전자 주식회사
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Priority to JP5268890A priority patent/JP2859526B2/en
Priority to CN93119833A priority patent/CN1041265C/en
Priority to DE69319840T priority patent/DE69319840T2/en
Priority to US08/143,618 priority patent/US5448309A/en
Priority to EP93308724A priority patent/EP0595663B1/en
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    • 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

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

Abstract

본 발명은 디지탈 영상신호의 잡은 제거장치에 관한 것으로 제1지연기, 제2지연기, 최소/최대비교기, 최대/최소비교기, 합산기, 감산기, 상관성검출기 및 출력선택기를 구비하여, 종래의 잡음 제거기에서 잡음을 제거할 때 신호성분까지도 왜곡되었던 것을 본 발명에 의한 상관성검출기를 이용하여 감산기의 출력신호와 지연기의 출력신호중 하나를 선택하여 출력함으로써, 신호의 에지(edge)부분과 같은 비상관 부분의 신호처리시에도 신호의 에지(edge)에 영향을 주지않고 잡음을 효과적으로 제거할 수 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for removing digital video signals, comprising a first delayer, a second delayer, a minimum / maximum comparator, a maximum / minimum comparator, a summer, a subtractor, a correlation detector, and an output selector. When the noise is removed from the eliminator, the signal component is distorted, so that one of the output signal of the subtractor and the output signal of the delayer is selected and output by using the correlation detector according to the present invention, so that it is uncorrelated, such as the edge of the signal. Even during signal processing of the part, noise can be effectively removed without affecting the edge of the signal.

Description

디지탈 영상신호의 잡음 제거기(Noise canceller)Noise canceller of digital video signal

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

제2도는 본 발명에 의한 디지탈 영상신호의 잡음 제거기를 도시한 블럭도이고, 제3A도는 디지탈 비디오 입력신호인 제1영상신호를 도시한 파형도이고, 제3B도는 제3A도에 도시된 제1영상신호가 1H만큼 지연된의 제2영상신호를 도시한 파형도이고, 제3C도는 제3B도에 도시된 제2영상신호가 1H만큼 지연된 제3영상신호를 도시한 파형도이고, 제3D도는 제3A도에 도시된 제1영상신호와 제3B도에 도시된 제2영상신호를 비교하여 구한 최소값을 도시한 파형도이고, 제3E도는 제3B도에 도시된 제2영상신호와 제3C에 도시된 제3영상신호를 비교하여 구한 최소값을 도시한 파형도이고, 제3F도는 제3A도에 도시된 제1영상신호와 제3B도에 도시된 제2영상신호를 비교하여 구한 최대값을 도시한 파형도이고, 제3G도는 제3B도에 도시된 제2영상신호와 제3C도에 도시된 제3영상신호를 비교하여 구한 최대값을 도시한 파형도이고, 제5A∼5E도는 종래의 장치와 본 발명에 의한 장치의 효과를 비교하여 도시한 파형도이다.FIG. 2 is a block diagram showing a noise canceller of a digital video signal according to the present invention, FIG. 3A is a waveform diagram showing a first video signal which is a digital video input signal, and FIG. 3B is a first diagram shown in FIG. 3A. FIG. 3C is a waveform diagram showing a second video signal delayed by 1H, and FIG. 3C is a waveform diagram showing a third video signal delayed by 1H in the second video signal shown in FIG. 3B. FIG. 3A is a waveform diagram showing the minimum value obtained by comparing the first video signal shown in FIG. 3A with the second video signal shown in FIG. 3B. FIG. 3E is a second video signal shown in FIG. 3F is a waveform diagram showing the minimum value obtained by comparing the third image signal, and FIG. 3F is a graph showing the maximum value obtained by comparing the first image signal shown in FIG. 3A and the second image signal shown in FIG. 3B. FIG. 3G is a waveform diagram, and FIG. 3G is a second video signal shown in FIG. 3B and a third video signal shown in FIG. 3C. Fig. 5A to 5E are waveform diagrams showing the effects of the conventional apparatus and the apparatus according to the present invention.

Claims (1)

현재의 디지탈 비디오 입력 데이타인 제1영상신호를 입력하여 1H만큼 지연시킨 제2영상신호를 출력하는 제1지연기와 상기 제2영상신호를 입력하여 1H만큼 지연시킨 제3영상신호를 출력하는 제2지연기와 상기 제1영상신호, 상기 제2영상신호, 상기 제3영상신호를 입력하여 상호 비교한 후 최소값들을 구하고 상기 최소값들을 다시 비교하여 최소값중 최대값을 출력하는 최소/최대비교기와 상기 제1영상신호, 상기 제2영상신호, 상기 제3영상신호를 입력하여 상호 비교한 후 최대값들을 구하고 상기 최대값들중 최소값을 출력하는 최대/최소비교기와 상기 최소/최대비교기의 출력신호와 상기 최대/최소비교기의 출력신호를 더하여 합산신호를 출력하는 합산기와 상기 합산신호에서 상기 제2영상신호를 감산하여 잡음이 제거된 디지탈 영상신호를 출력하는 감산기를 구비한 영상신호의 잡음 제거기에 있어서, 상기 제1영상신호, 상기 제2영상신호, 상기 제3영상신호로부터 상관성을 검출하여 제어신호를 출력하는 상관성검출기; 및 상기 감산기의 출력신호와 상기 제2영상신호를 입력하여 상기 제어신호에 따라 상관성이 있으면 상기 감산기의 출력을 선택하여 출력하고 상관성이 없으면 상기 제2영상신호를 출력하는 출력선택기를 더 구비한 것을 특징으로 하는 디지탈 영상신호의 잡음 제거기.A first delay for inputting a first video signal that is current digital video input data and outputting a second video signal delayed by 1H and a second outputting a third video signal delayed by 1H by inputting the second video signal A minimum / maximum comparator and a first / first comparator for outputting a maximum value among the minimum values after inputting a delay unit, the first image signal, the second image signal, and the third image signal, comparing each other, and comparing the minimum values again; The maximum / minimum comparator and the minimum / maximum comparator output signal and the maximum / maximum comparator are obtained by comparing the mutual input by inputting the video signal, the second video signal, and the third video signal. And a summation outputting a summation signal by adding an output signal of a minimum comparator and a subtracting second image signal from the summation signal to output a digital video signal from which noise is removed. A noise canceller according to the video signals, correlation detector for detecting the first outputs a control signal to the video signal, the second video signal, the correlation from the third video signal having an acid group; And an output selector for inputting the output signal of the subtractor and the second image signal and selecting and outputting the output of the subtractor if there is a correlation according to the control signal, and outputting the second image signal if there is no correlation. A noise canceller for a digital video signal. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920025635A 1992-10-30 1992-12-26 Noise canceller of digital image signal Expired - Fee Related KR0135863B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
KR1019920025635A KR0135863B1 (en) 1992-12-26 1992-12-26 Noise canceller of digital image signal
JP5268890A JP2859526B2 (en) 1992-10-30 1993-10-27 Noise reduction circuit for video signal
CN93119833A CN1041265C (en) 1992-10-30 1993-10-30 Noise canceler for video signal
DE69319840T DE69319840T2 (en) 1992-10-30 1993-11-01 Noise reduction for video signals
US08/143,618 US5448309A (en) 1992-10-30 1993-11-01 Noise canceler for video signal
EP93308724A EP0595663B1 (en) 1992-10-30 1993-11-01 Noise reduction for video signals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920025635A KR0135863B1 (en) 1992-12-26 1992-12-26 Noise canceller of digital image signal

Publications (2)

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KR940017731A true KR940017731A (en) 1994-07-27
KR0135863B1 KR0135863B1 (en) 1998-04-27

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