KR940003387A - Adaptive image contour correction circuit - Google Patents

Adaptive image contour correction circuit Download PDF

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Publication number
KR940003387A
KR940003387A KR1019920013761A KR920013761A KR940003387A KR 940003387 A KR940003387 A KR 940003387A KR 1019920013761 A KR1019920013761 A KR 1019920013761A KR 920013761 A KR920013761 A KR 920013761A KR 940003387 A KR940003387 A KR 940003387A
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South Korea
Prior art keywords
output signal
signal
output
delay circuit
sample delay
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KR1019920013761A
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Korean (ko)
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KR0150959B1 (en
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김정훈
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강진구
삼성전자 주식회사
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/14Picture signal circuitry for video frequency region
    • H04N5/142Edging; Contouring
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03HIMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01Frequency selective two-port networks
    • H03H7/12Bandpass or bandstop filters with adjustable bandwidth and fixed centre frequency
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K19/00Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/20Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits characterised by logic function, e.g. AND, OR, NOR, NOT circuits
    • HELECTRICITY
    • H03ELECTRONIC CIRCUITRY
    • H03KPULSE TECHNIQUE
    • H03K5/00Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K2005/00013Delay, i.e. output pulse is delayed after input pulse and pulse length of output pulse is dependent on pulse length of input pulse

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Picture Signal Circuits (AREA)

Abstract

이 발명은 영상 신호처리 시스템에 관한 것으로, 고역통과필터, 절대치 변환수단, 비교수단, 제1 선택수단 및 이득가변수단, 플립플롭부, 제 2선택수단, 승산기, 가산기, 지연수단으로 구성되어 영상신호처리시 발생하는 수직 및 수평 휘도신호의 레벨차이에 따라 윤곽부분을 보정할 수 있는 적응형 화상윤곽 보정회로에 관한 것이다.The present invention relates to a video signal processing system, comprising a high pass filter, an absolute value converting means, a comparing means, a first selecting means and a gain variable stage, a flip-flop portion, a second selecting means, a multiplier, an adder, and a delay means. The present invention relates to an adaptive image contour correction circuit capable of correcting contour portions in accordance with level differences of vertical and horizontal luminance signals generated during signal processing.

Description

적응형 화상윤곽 보정회로Adaptive image contour correction circuit

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

제2도는 이 발명에 따른 적응형 화상윤곽 보정회로의 구성도,2 is a block diagram of an adaptive image contour correction circuit according to the present invention;

제3도는 제2도의 고역통과필터의 일 실시예에 따른 회로도,3 is a circuit diagram according to an embodiment of the high pass filter of FIG.

제4도는 제2도의 비교수단의 일 실시예에 따른 회로도.4 is a circuit diagram according to an embodiment of the comparison means of FIG.

Claims (4)

단자(IN)로 입력된 영상신호(특히 휘도신호)의 고역성분만을 추출하기 위한 고역통과필터와, 상기 고역통과필터에서 출력된 신호를 양의 영역데이타로 치환하기 위해 절대치를 행하는 절대치 변환수단과, 상기 절대치 변환수단의 출력신호(201)와, 제1, 제2, 제3기준신호(ref1, ref2, ref3)를 비교하여 윤곽강조여부 및 윤곽강조 레벨크기를 결정하는 신호(S1,S0,C)를 출력하는 비교수단과, 상기 비교수단의 출력신호(S1,S0)에 따른 여러종류의 신호레벨을 이득조절신호(Gain)에 의해 이득을 조절하여 선택적으로 출력하는 제1선택수단 및 이득가변수단과, 상기 고역통과필터의 출력신호(10')를 일시저장하여 출력하는 플립플롭부와, 상기 비교수단의 출력신호(C)에 따라 상기 플립플롭부의 출력신호(Q,Q)를 선택적으로 출력하는 제2선택수단과, 상기 제1선택수단 및 이득가변수단의 출력신호와 제2선택수단의 출력신호간의 승산을 행하는 승산기와, 단자(IN)로 입력된 영상신호(특히 휘도신호)를 일정한 주기동안 지연시켜 출력하는 지연수단과, 상기 승산기의 출력신호와 지연수단의 출력신호를 상기 비교수단의 출력신호(C)에 따라 가산하는 가산기로 구성된 적응형 화상윤곽 보정회로.A high pass filter for extracting only the high frequency components of the image signal (especially the luminance signal) input to the terminal IN, an absolute value converting means for performing absolute values to replace the signal output from the high pass filter with positive area data; And comparing the output signal 20 1 of the absolute value converting means with the first, second, and third reference signals ref1, ref2, ref3 to determine whether the contour emphasis and the contour emphasis level are determined (S1, S0). Comparison means for outputting C, first selection means for selectively outputting various types of signal levels according to the output signals S1 and S0 of the comparison means by adjusting gain by a gain control signal Gain; A gain-flop stage, a flip-flop unit for temporarily storing and outputting the output signal 10 'of the high pass filter, and output signals Q and Q of the flip-flop unit according to the output signal C of the comparing means. Second selection means for selectively outputting the first selection means, and A multiplier for multiplying between the output signal of the gain variable stage and the output signal of the second selection means, delay means for delaying and outputting a video signal (especially a luminance signal) input to the terminal IN for a predetermined period, and An adaptive image contour correction circuit comprising an adder which adds an output signal and an output signal of the delay means according to the output signal C of the comparison means. 제1항에 있어서, 상기 고역통과필터는 단자(IN)를 통해 입력된 영상신호가 제1한샘플 지연회로가 제1계수회로에 제공되고, 제1한샘플지연회로의 출력신호는 제2한샘플 지연회로에 제공되며, 제2한샘플 지연회로의 출력신호는 제3한샘플 지연회로와 제2계수회로에 각각 제공되고, 제3한샘플 지연회로의 출력신호는 제4한샘플 지연회로에 제공되며, 제4한샘플 지연회로의 출력신호는 제3계수회로에 제공되고, 상기 제1, 제3계수회로의 출력신호는 가산기(13)에 제공되고, 상기 제1, 제3계수회로의 출력신호는 가산기(13)에 제공되어 가산된 후 승산기(14)에 제공되어 제2계수회로의 출력신호와 곱해져 출력신호(10')를 제공함을 특징으로 하는 적응형 화상윤곽 보정회로.2. The high pass filter of claim 1, wherein the first delay circuit comprises a first sample delay circuit having a first sample delay circuit inputted through a terminal IN, and an output signal of the first sample delay circuit. The output signal of the second sample delay circuit is provided to the third sample delay circuit and the second coefficient circuit, respectively, and the output signal of the third sample delay circuit is supplied to the fourth sample delay circuit. And an output signal of the fourth sample delay circuit is provided to the third coefficient circuit, and output signals of the first and third coefficient circuits are provided to the adder 13, and the output signal of the first and third coefficient circuits is And the output signal is added to the adder (13) and then added to the multiplier (14) to multiply with the output signal of the second coefficient circuit to provide an output signal (10 '). 제1항에 있어서, 상기 비교수단은 제1, 제2, 제3기준신호(ref1, ref2, ref3)와 상기 절대치 변환 수단으로부터의 출력신호(20')를 조합하여 출력하는 제1, 제2, 제3비교기와, 상기 제1, 제2, 제3비교기 각각의 출력신호를 논리곱하여 출력하는 앤드게이트와, 상기 제1, 제2비교기의 출력신호를 조합하여 출력하는 제1익스클루시브 오아게이트와, 제2, 제3비교기의 출력신호를 조합하여 출력하는 제2익스클루시브 오아게이트와, 상기 앤드게이트의 출력신호와 제1익스클루시브 오아게이트의 출력신호를 논리곱하여 논리데이타를 출력하는 제1오아게이트와, 상기 앤드게이트의 출력신호와 제2익스클루시브 오아게이트의 출력신호를 논리곱하여 논리데이타를 출력하는 제2오아게이트와, 상기 제1, 제2오아게이트의 출력신호(S1,S0)를 조합하여 출력하는 노아게이트(NOR1)로 구성됨을 특징으로 하는 적응형 화상윤곽 보정회로.2. The apparatus of claim 1, wherein the comparison means combines the first, second, and third reference signals ref1, ref2, ref3 and the output signal 20 'from the absolute value converting means. , A first comparator with a third comparator, an AND gate for logically multiplying the output signals of the first, second, and third comparators, and an output signal of the first and second comparators; Logic data is output by logically multiplying a gate, a second exclusive oragate which combines the output signals of the second and third comparators, and an output signal of the AND gate and an output signal of the first exclusive oragate. A second or gate which outputs logical data by logically multiplying the first or the output signal of the AND gate and the output signal of the second exclusive oragate, and the output signals of the first and second Noah gate (NOR1) that combines S1, S0) Adaptive image contour correction circuit, characterized by configured. 제1항에 있어서, 상기 비교수단의 제1, 제2, 제3기준신호(ref1, ref2, ref3)는 사용자에 의해 임의로 그 값을 가변할 수 있도로 한 적응형 화상윤곽 보정회로.The adaptive image contour correction circuit according to claim 1, wherein the first, second, and third reference signals (ref1, ref2, ref3) of the comparing means can be arbitrarily changed by a user. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920013761A 1992-07-31 1992-07-31 The compensation circuit of an adaptive picture contour KR0150959B1 (en)

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Application Number Priority Date Filing Date Title
KR1019920013761A KR0150959B1 (en) 1992-07-31 1992-07-31 The compensation circuit of an adaptive picture contour

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Application Number Priority Date Filing Date Title
KR1019920013761A KR0150959B1 (en) 1992-07-31 1992-07-31 The compensation circuit of an adaptive picture contour

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KR940003387A true KR940003387A (en) 1994-02-21
KR0150959B1 KR0150959B1 (en) 1998-10-15

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