KR930015894A - 2D luminance / color signal separation system - Google Patents

2D luminance / color signal separation system Download PDF

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KR930015894A
KR930015894A KR1019910023324A KR910023324A KR930015894A KR 930015894 A KR930015894 A KR 930015894A KR 1019910023324 A KR1019910023324 A KR 1019910023324A KR 910023324 A KR910023324 A KR 910023324A KR 930015894 A KR930015894 A KR 930015894A
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South Korea
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signal
sample
output
color signal
color
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KR1019910023324A
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KR940006627B1 (en
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홍성훈
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이헌조
주식회사 금성사
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/77—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase
    • H04N9/78—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase for separating the brightness signal or the chrominance signal from the colour television signal, e.g. using comb filter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/44—Colour synchronisation
    • H04N9/45—Generation or recovery of colour sub-carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/646—Circuits for processing colour signals for image enhancement, e.g. vertical detail restoration, cross-colour elimination, contour correction, chrominance trapping filters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/648—Video amplifiers

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

본 발명은 컬러 텔레비젼 수상기에 적용되는 구적법 변조된 후도/색도 분리 기술에 관한 것으로, 종래의 티브이에 사용되는 휘도신호/색신호 분리방식인 라인 콤필터나 노취필터 사용에 의하여 발생되는 행잉도트나 크롤링 도트현상, 크로스 컬러에 의한 무지개 무뉘의 번짐현상을 수평방향 2샘플 콤필터와 수직방향 2라인 콤필터 출력신호에 영상의 변화율에 따르는 가중치(Weighting Factor)를 부가하는 방식을 채택하여 해결하고, 움직임 적응형 휘도신호/색신호 분리기의 문제점인 프레임 메모리 사용에 의한 가격상승 문제를 2라인 메모리만을 사용하여 해결하며, 시청자의 화질 판단 정도를 고려할 경우 약간의 수직 해상동 문제를 해결하며, 움직임 계수 발생부에서 IIR필터개념을 이용하여 영상의 일관성이 유지되므로 두더러진 화질 저하현상이 제거되며, 수평, 수직방향으로 영상의 변화정도를 판단하는 제어신호를 티브이와 영상처리방식에 적용 할 수 있다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to quadrature-modulated back / color separation techniques applied to color television receivers, and includes a hanging dot or a crawl generated by using a line comb filter or a notch filter, which is a luminance signal / color signal separation method used in conventional TVs. To solve the phenomenon of bleeding due to the dots and cross colors, the weighting factor according to the rate of change of the image is added to the horizontal two-sample comb filter and the vertical two-line comb filter output signal. It solves the problem of price increase due to the use of frame memory, which is a problem of the adaptive luminance signal / color signal separator, using only two-line memory, and solves the slight vertical resolution problem when considering the quality of the viewer's image quality. Using IIR filter concept to maintain image consistency, eliminating blemishes It said, the control signals that determine the amount of horizontal shift, the image in the vertical direction can be applied to TV and video processing method.

Description

2차원 휘도/색신호 분리 시스템2D luminance / color signal separation system

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제4도는 본 발명의 2차원 휘도/색신호 분리 시스템에 대한 개략블록도, 제5도는 제4도에 대한 상세 블록도, 제6도는 제4도에서 2라인 색신호-콤필터의 상세 블럭도, 제7도는 제4도에서 수평 2샘플 색신호-콤필터의 상세 블럭도, 제8도는 제4도에서 움직임 계수 발생부의 상세 블록도, 제9도는 제7도에서 계수발생부의 주파수 응답특성도.4 is a schematic block diagram of a two-dimensional luminance / color signal separation system of the present invention, FIG. 5 is a detailed block diagram of FIG. 4, FIG. 6 is a detailed block diagram of a two-line color signal-comb filter in FIG. 7 is a detailed block diagram of a horizontal two-sample color signal-comb filter in FIG. 4, FIG. 8 is a detailed block diagram of a motion coefficient generator in FIG. 4, and FIG. 9 is a frequency response characteristic diagram of a coefficient generator in FIG.

Claims (4)

4fsc로 샘플링된 디지탈 복합영상신호(CV)를 3.58MHZ의 색부반송파(Fsc(를 중심으로 2.1-4.7MHZ 대역의 신호를 통과시키는 대역필터(13)와, 910샘플, 2×910샘플 지연된 상기 대역필터(13)의 출력신호를 합성하여 수직방향에 대해 2라인 콤필터링된 색신호를 출력하는 2라인 색신호-콤필터(20)와, 908샘플, 910샘플, 912샘플 지연된 상기 대역필터(13)의 출력 신호를 합성해서 수평방향에 대하여 2샘플형 콤필터링된 색신호를 출력하는 수평2샘플 색신호-콤필터(30)와, 상기 대역필터(13)의 출력신호를 입력하는 수평방향, 수직방향으로의 영상 변화량을 측정하고, 그 수평, 수직 방향으로의 영상변화량을 서로 비교하여 그에 따른 움직임 계수(K)를 출력하는 움직임 계수 발생부(40)와, 상기 2라인 색신호콤필터(20), 수평2샘플 색신호 콤필터(30)에 출력되는 각각의 색신호에 대하여 상기 움직임계수 발생부(40)에 출력되는 움직임계(K),(1-K)를 각기 곱하는 k증폭기(51A), 1-k증폭기(51B)와, 상기 k증폭기(51A), 1-k증폭기(51B)의 출력신호를 더하여 그 결과치를 최종의 색신호(C)로 출력하는 가산기(52A)와, 상기 디지탈 복합영상신호(CV)에서 상기 가산기(52A)의 출력신호를 감산하여 그 결과치를 최종의 휘도신호(Y)로 출력하는 감산기(52B)로 구성한 것을 특징으로 하는 2차원 휘도/색신호 분리 시스템.A band filter 13 for passing a digital composite video signal (CV) sampled at 4 fsc and a color subcarrier (3.58 MHZ) of a frequency band of 2.1 to 4.7 MHZ (Fsc), and a 910 sample and a 2 x 910 sample delayed band. A two-line color signal-comb filter 20 for synthesizing the output signal of the filter 13 and outputting a two-line com-filtered color signal with respect to the vertical direction, and a 908 sample, 910 sample, and 912 sample delayed band filter 13; A horizontal two-sample color signal-comb filter 30 for synthesizing the output signals and outputting a two-sample comb-filtered color signal with respect to the horizontal direction, and horizontal and vertical directions for inputting the output signal of the band filter 13; A motion coefficient generator 40 for measuring the amount of image change and comparing the amount of change in the horizontal and vertical directions with each other and outputting a motion coefficient K according to the two-line color signal comb filter 20 and horizontal 2 For each color signal output to the sample color signal comb filter 30 K-amplifiers 51A, 1-k amplifiers 51B, and k-amplifiers 51A, 1-k, which multiply the motion systems K, 1-K outputted to the motion coefficient generator 40, respectively. The adder 52A adds the output signal of the amplifier 51B and outputs the result as the final color signal C. The output signal of the adder 52A is subtracted from the digital composite video signal CV. A two-dimensional luminance / color signal separation system comprising a subtractor (52B) for outputting the final luminance signal (Y). 제1항에 있어서, 2라인 색신호-콤필터(20)는 상기 대역필터(13)의 출력신호를 910샘플 지연시키는 910샘플 지연기(21)와, 상기 910샘플 지연기(21)의 출력신호를 다시 910샘플 지연시키는 910샘플지연기(22)와 상기 대역필터(13)의 출력신호910샘플 지연기(22)의 출력신호를 각각 1/2증폭하는 1/2증폭기(23A),(23B)와, 상기 910샘플 지연기(21)를 출력신호에서 상기 1/2증폭기(23A),(23B)의 출력신호를 감산하여 수직 방향에 대해 2라인 콤필터링된 색신호를 출력하는 감산기(24)와, 상기 감산기(24)의 출력신호를 ½증폭하는 1/2증폭기(23C)로 구성한 것을 특징으로 하는 2차원 휘도/색신호 분리 시스템.The two-line color signal comb filter (20) according to claim 1, further comprising: a 910 sample delayer (21) for delaying the output signal of the bandpass filter (910) by 910 samples, and an output signal of the 910 sample delayer (21). 1/2 amplifiers 23A and 23B which respectively amplify the output signals of the 910 sample delayer 22 and the output signal 910 sample delayer 22 of the band filter 13 to delay the 910 samples again. And a subtractor 24 for subtracting the output signals of the 1/2 amplifiers 23A and 23B from the output signal of the 910 sample delayer 21 and outputting two-line com-filtered color signals in the vertical direction. And a half amplifier (23C) for half amplifying the output signal of the subtractor (24). 제1항에 있어서, 수평 2샘플 색신호-콤필터(30)는 908샘플지연기(21A)의 출력신호를 1/2증폭하는 1/2증폭기(31A)와, 1샘플 지연기(222B)에 출력되는 912샘플 지연된 신호를 1/2증폭하는 1/2증폭기(31B)와, 1샘플 지연기(21C)에 출력되는 910샘플 지연된 신호에서 상기 1/2증폭기(31A),(31B)의 출력신호를 감산하여 수평방향에 대해 2샘플형 콤필터링된 색신호를 출력하는 감산기(33)와, 상기 감산기(33)의 출력신호를 다시 1/2증폭출력하는 1/2증폭기(31C)로 구성한 것을 특징으로 하는 2차원 휘도/색신호 분리 시스템.The horizontal two-sample color signal-comb filter (30) is provided with a half amplifier (31A) for half amplifying the output signal of the 908 sample delay (21A) and one sample delay (222B). A half amplifier 31B for half amplifying the output 912 sample delayed signal, and an output of the half amplifiers 31A and 31B for the 910 sample delayed signal output to the one sample delay 21C. A subtractor 33 for subtracting the signal to output a two-sampled comb filtered color signal in the horizontal direction, and a half amplifier 31C for outputting the output signal of the subtractor 33 amplified again. A two-dimensional luminance / color signal separation system. 제1항에 있어서, 움직임계수 발생부(40)는 상기 대역필터(13)의 출력신호와 2라인 샘플지연된 신호의 차를 구하는 감산기(41A)와, 908샘플 지연된 신호와 912샘플 지연된 신호의 차를 구하는 감산기(41B)와, 상기 감산기(41A),(41B)각각의 출력신호에 대해 각기 절대값을 산출하는 절대값 산출기(42A),(42B)와, 상기 절대값 산출기(42B)의 출력단에 접속되어 수평 변화율과 수직 변화율의 비중율 조정하는증폭기(43)와, 상기 절대 값 산출기(42A)에 출력되는 수직방향의 영상신호 변화량과증폭기(43)에 출력되는 수평방향의 영상신호 변화량을 비교하여 그에따른 움직임 계수값을 출력하는 비교기(44)와, 상기 비교기(44)의 출력값에 1샘플 메모리(46)를 통해 궤환된 현재 움직임 계수(K)를 더하여 그 비교기(44)의 출력이 일괄성을 갖지 못하는 경우, 그 일괄성을 보상해 주는 움직임계수 발생기(40´)로 구성한 것을 특징으로 하는 2차원 휘도, 색신호 분리 시스템.The motion coefficient generator (40) according to claim 1, wherein the motion coefficient generator (40) obtains a difference between the subtractor (41A) for obtaining the difference between the output signal of the band filter (13) and the two-line sample delayed signal, and the difference between the 908 sample delayed signal and the 912 sample delayed signal. A subtractor 41B for obtaining the?, Absolute value calculators 42A and 42B for calculating absolute values for the respective output signals of the subtractor 41A, 41B, and the absolute value calculator 42B; Connected to the output terminal of The amount of change in the vertical video signal output to the amplifier 43 and the absolute value calculator 42A, and A comparator 44 which compares the change amount of the video signal in the horizontal direction output to the amplifier 43 and outputs a motion coefficient value according thereto, and the current motion fed back through the one sample memory 46 to the output value of the comparator 44. A two-dimensional luminance and color signal separation system comprising a motion coefficient generator (40 ') that compensates for the collectiveness when the output of the comparator (44) is not added by adding the coefficient (K). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019910023324A 1991-12-18 1991-12-18 Luma/chroma signal separation KR940006627B1 (en)

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Application Number Priority Date Filing Date Title
KR1019910023324A KR940006627B1 (en) 1991-12-18 1991-12-18 Luma/chroma signal separation

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Application Number Priority Date Filing Date Title
KR1019910023324A KR940006627B1 (en) 1991-12-18 1991-12-18 Luma/chroma signal separation

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KR930015894A true KR930015894A (en) 1993-07-24
KR940006627B1 KR940006627B1 (en) 1994-07-23

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KR1019910023324A KR940006627B1 (en) 1991-12-18 1991-12-18 Luma/chroma signal separation

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