KR920007477A - Luminance / Color Signal Separation Circuit - Google Patents

Luminance / Color Signal Separation Circuit Download PDF

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Publication number
KR920007477A
KR920007477A KR1019900015734A KR900015734A KR920007477A KR 920007477 A KR920007477 A KR 920007477A KR 1019900015734 A KR1019900015734 A KR 1019900015734A KR 900015734 A KR900015734 A KR 900015734A KR 920007477 A KR920007477 A KR 920007477A
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South Korea
Prior art keywords
signal
luminance
output
separation
subtractor
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KR1019900015734A
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Korean (ko)
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KR930005614B1 (en
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김기현
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이헌조
주식회사 금성사
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Publication of KR920007477A publication Critical patent/KR920007477A/en
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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

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

Abstract

내용 없음.No content.

Description

휘도/색도신호 분리회로Luminance / Color Signal Separation Circuit

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

제1도는 일반적인 휘도/색도신호 분리회로에 대한 블록도.1 is a block diagram of a general luminance / chromatic signal separation circuit.

제2도는 본 발명의 휘도/색도신호 분리회로에 대한 블록도.2 is a block diagram of a luminance / chromatic signal separation circuit of the present invention.

제3도는 제2도에서 제어신호발생부(300)의 상세 블록도.3 is a detailed block diagram of the control signal generator 300 in FIG.

제4도는 제2도에서 휘도 색도신호 분리필터(400)의 상세 블록도.4 is a detailed block diagram of the luminance chromaticity signal separation filter 400 in FIG.

제5도는 복합영상신호의 주파수 스펙트럼도.5 is a frequency spectrum diagram of a composite video signal.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

100,403 : 저역통과필터 300 : 302,317,406 : 감산기100,403: Low pass filter 300: 302,317,406: Subtractor

300 : 제어신호발생부 300A : 저역휘도신호 변화검출부300: control signal generator 300A: low luminance signal change detection unit

300B : 고역 휘도신호 변화검출부300B: high frequency luminance signal change detector

301-303,305,307-310,312,315,401,500 : 지연기301-303,305,307-310,312,315,401,500: Delay

304,306,318 : 임계값설정부 311,316,402,404,600 : 가산기304, 306, 318: Threshold setting unit 311, 316, 402, 404, 600: Adder

400 : 휘도,색도신호 분리필터 405 : 선택부400: luminance and chroma signal separation filter 405: selection unit

CP31-CP33 : 비교기 MP31-MP37 : 승산기CP31-CP33: Comparator MP31-MP37: Multiplier

NR31 : 노아게이트 AD31 : 앤드게이트NR31: Noah gate AD31: Andgate

Claims (4)

NTSC 복합영상신호(CV)에서 휘도신호와 색도신호를 분리하는 시스템에 있어서, 복합영상신호(CV)에서 저역의 휘도신호를 추출하는 저역통과필터(100)와, 복합영상신호(CV)에서 상기 저역통과필터(100)의 출력신호를 빼내는 감산기(200)와, 상기 저역통과필터(100)의 출력신호 및 휘도변화신호를 제공받아 휘도, 색도신호의 분리를 제어하는 제어신호 발생부(300)와, 색도성분이 섞여 있는 부분으로 분리된 성분의 휘도, 색도신호를 분리할때 주사선간의 색도신호가 180°의 위상차를 갖는 것을 이용하여 분리하는 것과 140ns의 사이를 두고 색도신호의 위상차가 180°를 갖는 것을 이용하여 분리하되, 상기 제어신호발생부(300)의 제어에 따라 그들중의 하나를 선택하는 휘도, 색도신호 분리필터(400)와, 상기 저역통과필터(100)의 출력신호를 상기 휘도, 색도신호 분리필터(400)에서 필요로 하는 분리시간 만큼 지연시키는 지연기(500)와, 상기 휘도, 색도신호를 분리필터(400)에서 출력되는 고역의 휘도신호(YH)에 상기 지연기(500)에서 출력되는 저역의 휘도신호(YL)를 더하는 가산기(600)로 구성된 것을 특징으로 하는 휘도/색도신호 분리회로.A system for separating a luminance signal and a chroma signal from an NTSC composite video signal (CV), the low pass filter (100) extracting a low luminance signal from a composite video signal (CV), and the composite image signal (CV) A subtractor 200 for extracting the output signal of the low pass filter 100 and a control signal generator 300 for controlling the separation of luminance and chroma signals by receiving the output signal and the luminance change signal of the low pass filter 100. The phase difference of chromaticity signal is 180 ° between 140ns and the separation of chromaticity signal between scanning lines when separating brightness and chromaticity signal of separated component into chromatic components. Separating using the one having, and the luminance, chromaticity signal separation filter 400 for selecting one of them under the control of the control signal generator 300 and the output signal of the low pass filter 100 Separated luminance and chroma signal Output from the delay unit 500 and the brightness, remove the chrominance signal filter 400, a luminance signal wherein the retarder 500 to the (Y H) of the high-frequency output from the delaying by separation time required by 400 A luminance / chromatic signal separation circuit comprising: an adder (600) to add a low-frequency luminance signal (Y L ). 제1항에 있어서, 휘도, 색도신호 분리 수행지점의 주변에서 저역의 휘도성분 레벨 변화를 검출하여 이의 값이 임계값 이상이 될 때 휘도, 색도 분리필터(400)가 주사선간의 위상차를 이용하여 색도, 휘도신호를 분리하게 제어신호를 출력하는 저역휘도 변화검출부(300A)를 구성한 것을 특징으로 하는 휘도/색도신호 분리회로.The luminance and chromaticity separation filter 400 uses a phase difference between scan lines when a change in the luminance component level of a low range is detected around the point where the luminance and chromaticity signal separation is performed, and the value thereof is greater than or equal to a threshold value. And a low-pass luminance change detection unit (300A) for outputting a control signal to separate the luminance signal. 제1항에 있어서, 휘도색도신호 분리 수행지점 주변의 여러샘플들로부터 그 지점의 고역의 휘도레벨을 검출하고, 이전주사선의 동일 지점에서도 상기와 같이 고역의 휘도 레벨을 검출하여 그들의 차가 임계값을 넘을때 그에따른 제어신호를 상기 휘도, 색도신호 분리필터(400)에 출력하게 구성된 것을 특징으로 하는 휘도/색도신호 분리회로.The method of claim 1, wherein the luminance level of the high range is detected from several samples around the luminance chromatic signal separation performing point, and the luminance level of the high region is detected as described above even at the same point of the previous scan line, and their difference is determined. The luminance / chromatic signal separation circuit, characterized in that configured to output the control signal according to the intensity, chroma signal separation filter 400 accordingly. 제1항에 있어서, 상기 감산기(200)의 출력신호를 1 수평라인 지연시키는 지연기(401)와, 상기 지연기(401)의 출력신호와 상기 감산기(200)의 출력신호를 더하는 가산기(402)와, 상기 감산기(200)의 출력신호에서 휘도신호를 추출하는 저역통과필터(403)와, 상기 가산기(402)에 상기 저역통과필터(403)의 출력신호를 더하는 가산기(404)와, 상기 제어신호 발생부(300)의 제어에 따라 상기 가산기(402), (404)의 출력신호를 선택적으로 받아들이는 선택부(405)와, 상기 감산기(200)의 출력신호에서 상기 선택부(405)의 출력신호를 감산하여 색도신호(Cout)를 출력하는 감산기(406)로 상기 휘도, 색도신호 분리필터(400)를 구성한 것을 특징으로 하는 휘도, 색도신호 분리회로.The adder 402 of claim 1, further comprising: a delayer 401 for delaying the output signal of the subtractor 200 by one horizontal line, and an adder 402 for adding the output signal of the delayer 401 and the output signal of the subtractor 200. ), A low pass filter 403 for extracting a luminance signal from the output signal of the subtractor 200, an adder 404 for adding an output signal of the low pass filter 403 to the adder 402, and A selection unit 405 for selectively receiving output signals of the adders 402 and 404 under the control of the control signal generator 300, and the selection unit 405 from the output signal of the subtractor 200. And a luminance and chroma signal separation filter (400) comprising a subtractor (406) for subtracting an output signal of the output signal to output a chroma signal (Cout). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019900015734A 1990-09-29 1990-09-29 Separating circuit of y/c KR930005614B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019900015734A KR930005614B1 (en) 1990-09-29 1990-09-29 Separating circuit of y/c

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Application Number Priority Date Filing Date Title
KR1019900015734A KR930005614B1 (en) 1990-09-29 1990-09-29 Separating circuit of y/c

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KR920007477A true KR920007477A (en) 1992-04-28
KR930005614B1 KR930005614B1 (en) 1993-06-23

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