KR900008517Y1 - Chrominance signal composition circuit - Google Patents
Chrominance signal composition circuit Download PDFInfo
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- KR900008517Y1 KR900008517Y1 KR2019870006143U KR870006143U KR900008517Y1 KR 900008517 Y1 KR900008517 Y1 KR 900008517Y1 KR 2019870006143 U KR2019870006143 U KR 2019870006143U KR 870006143 U KR870006143 U KR 870006143U KR 900008517 Y1 KR900008517 Y1 KR 900008517Y1
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- generator
- chrominance signal
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- 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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- 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
- H04N9/67—Circuits for processing colour signals for matrixing
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Color Television Image Signal Generators (AREA)
Abstract
내용 없음.No content.
Description
제 1 도는 본 고안의 블록도.1 is a block diagram of the present invention.
제 2 도는 본 고안의 회로도.2 is a circuit diagram of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1-4 : 프리앰프 5-7 : 차동 증폭기1-4: Preamplifier 5-7: Differential Amplifier
8 : 색 신호 발생부 9 : 매트릭스부8: color signal generator 9: matrix unit
10-13 : 저역 통과 필터 16 : 프로세스10-13: Low Pass Filter 16: Process
19 : 동기 발생부 20 : 엔코더19: Sync generator 20: Encoder
R1-R16: 저항R 1 -R 16 : resistance
본 고안은 비데오 카메라의 감도 및 해상도를 높여 주도록한 색 신호 합성 회로에 관한 것이다.The present invention relates to a color signal synthesizing circuit for enhancing the sensitivity and resolution of a video camera.
비데오 색 신호의 출력은 칼라 신호(R, G, B)와 휘도신호(Y)로 되어 있는데 이 신호의 합성으로 기준 7가지의 색을 비데오 영상으로 하게 되어 있으며 그 7가지 색은 칼라 신호인 적색(R), 녹색(G), 청색(B)의 3가지 색과 시안(Cy), 마젠타(Mg), 노랑(Ye), 흰색(W)으로 되어 있다.The output of the video color signal is composed of color signals (R, G, B) and luminance signal (Y). By combining these signals, 7 standard colors are used as the video image. It consists of three colors (R), green (G), and blue (B) and cyan (Cy), magenta (Mg), yellow (Ye), and white (W).
이와같은 신호의 합성은 칼라 신호인 R, G, B색으로 합성시키게 되는데 이는 Cy=B+G, Mg=R+B, Ye=R+G, W=R+G+B의 합성으로 얻어진 7가지 색을 비데오 영상으로 하게 되나 이같은 방식의 합성신호는 비데오 신호의 감도를 떨어뜨리고 색번짐(Blooming)현상과 색 흐려짐(Smear) 현상을 초래하게 되어 결과적으로 비데오 신호의 해상도를 떨어뜨리게 되는 것이었다.This signal is synthesized by the color signals R, G, and B colors, which are obtained by the synthesis of Cy = B + G, Mg = R + B, Ye = R + G, and W = R + G + B. Branch colors are used as video images, but the synthesized signal in this manner reduces the sensitivity of the video signal, causes color bleeding and color blur, and consequently, the resolution of the video signal.
본 고안은 이와같은 점을 감안하여 색 신호 발생부의 기준 색 신호를 매트릭스부와 차동증폭기를 통하여 휘도 신호(Y)와 색 신호(R, G, B)를 얻도록 하므로써 비데오 카메라의 감도 및 해상도를 증대시키도록 한 것이다.In view of the above, the present invention obtains the luminance signal (Y) and the color signals (R, G, and B) through the matrix unit and the differential amplifier by using the reference color signal of the color signal generator to improve the sensitivity and resolution of the video camera. It is intended to increase.
즉 휘도 신호(Y)의 합성과 색 신호(R, G, B)의 합성을 살펴보면 Y=W+Ye+Cy+G, R=(W+Ye)-(Cy+G), B=(W+Cy)-(Ye+G), G=(Ye+Cy+G )-W로 합성되게 한 것이다.In other words, the synthesis of the luminance signal Y and the synthesis of the color signals R, G, and B are described as follows: Y = W + Ye + Cy + G, R = (W + Ye)-(Cy + G), and B = (W + Cy)-(Ye + G), G = (Ye + Cy + G) -W.
이를 첨부 도면에 의하여 상세히 설명하면 다음과 같다.This will be described in detail with reference to the accompanying drawings.
동기 발생부(19)의 동기 신호가 구동회로(18)를 통하여 인가되는 색 신호 발생부(8)에서 출력되는 색 신호(G, Cy, W, Ye)는 프리앰프(1-4)를 통하여 매트릭스부(9)에 인가되게 구성하고 저항(R1-R16)으로 구성된 매트릭스부(9)의 휘도 신호(Y)는 저역 통과 필터(10)를 거친 후 앰프와 클램프 회로로 구성된 휘도 신호 증폭부(14)와 트랩 회로로 구성된 휘도 신호 윤곽부(15)를 통하여 프로세스(16)에 인가되게 구성하며 매트릭스부(9)의 색 신호(R, G, B)의 차동 증폭기(5-7)와 저역 통과 필터(11-13)를 통하여 프로세스(16)에 인가되게 구성한다.The color signals G, Cy, W, and Ye output from the color signal generator 8, to which the synchronization signal from the synchronization generator 19 is applied through the driving circuit 18, are transferred through the preamps 1-4. The luminance signal Y of the matrix portion 9 configured to be applied to the matrix portion 9 and composed of resistors R 1 -R 16 passes through the low pass filter 10 and then amplifies the luminance signal composed of an amplifier and a clamp circuit. The differential amplifiers 5-7 of the color signals R, G, and B of the matrix unit 9, which are configured to be applied to the process 16 through the luminance signal contour 15 consisting of the unit 14 and the trap circuit. And a low pass filter (11-13) to be applied to the process (16).
그리고 화이트 밸런스(17)가 연결된 프로세스(16)의 출력신호(B-Y, Y, R-Y)는 동기 발생부(19)가 연결된 엔코더(20)를 통한 후 증폭기(21)를 통하여 비데오 신호로 출력되게 구성한다.The output signals BY, Y, and RY of the process 16 to which the white balance 17 is connected are configured to be output as video signals through the amplifier 21 after the encoder 20 to which the synchronization generator 19 is connected. do.
이와같이 구성된 본 고안에서 동기 발생부(19)의 동기 신호가 구동회로(18)를 통하여 인가되는 색 신호 발생부(8)에서는 4개의 보색계 색 신호(G, Cy, W, Ye)를 발생시키게 되며 이때의 색 신호 발생부(8)에서 발생되는 색 신호는 아주 미약하기 때문에 프리앰프(1-4)를 통하여 증폭시킨후 저항(R1-R16)으로 구성된 매트릭스부(9)에 인가시시게 된다.In the present invention configured as described above, the color signal generator 8 to which the synchronization signal of the synchronization generator 19 is applied through the driving circuit 18 generates four complementary color signals G, Cy, W, and Ye. In this case, since the color signal generated by the color signal generator 8 is very weak, the color signal is amplified through the preamps 1-4 and applied to the matrix unit 9 composed of resistors R 1 -R 16 . It is sour.
그리고 저항(R1-R16)으로 구성된 매트릭스부(9)에서는 차동 증폭기(5-7)를 통하여 보색계 색 신호(G, Cy, W, Ye)를 합성시켜 휘도 신호(Y)와 색 신호(R, G, B)를 출력시키게 되는데 이때의 합성방식은 다음과 같다.In the matrix unit 9 composed of resistors R 1 -R 16 , the complementary color signals G, Cy, W, and Ye are synthesized through the differential amplifiers 5-7 to generate the luminance signal Y and the color signal. (R, G, B) is outputted, and the synthesis method is as follows.
먼저 휘도 신호(Y)의 합성은 Y=W+Ye+Cy+G=(R+G+B)+(G+R)+(G+B) +G=2R+2B+4G 이고 적색 신호(R)의 합성은 R=(W+Ye)-(Cy+G)=(R+G+B)+(G+R)-(G+B)-G=2R 이며 청색 신호(B)의 합성은 B=(W+Cy)-(Ye+G)=(R+G+B)+(G+B)-(R+G)-G=2B 이고 녹색 신호(G)의 합성은 G=(Ye+Cy+G)-W=(R+G)+(B+G)+G-(R+G+B)=2G 이다.First, the synthesis of the luminance signal Y is Y = W + Ye + Cy + G = (R + G + B) + (G + R) + (G + B) + G = 2R + 2B + 4G and the red signal ( The synthesis of R) is R = (W + Ye)-(Cy + G) = (R + G + B) + (G + R)-(G + B) -G = 2R and the synthesis of blue signal (B) Is B = (W + Cy)-(Ye + G) = (R + G + B) + (G + B)-(R + G) -G = 2B and the synthesis of the green signal (G) is G = ( Ye + Cy + G) -W = (R + G) + (B + G) + G- (R + G + B) = 2G.
이와 같이 출력된 칼라 신호(R, G, B)를 저역통과 필터(11-13)를 통하여 프로세스(16)에 인가시키고 휘도 신호(Y)는 저역통과필터(10)를 거친후 휘도신호증폭부(14)와 휘도 신호 윤곽부(15)를 통하여 프로세스(16)에 인가시키게 된다. 따라서 화이트 밸런스(17)가 연결된 프로세스(16)에서는 이러한 휘도신호(Y)와 색신호(R, G, B)로 출력 신호(B-Y, Y, R-Y)를 만들어 동기 발생부(19)의 동기 신호가 인가되는 엔코더(20)에 인가시킴으로써 엔코더(20)에서는 증폭기(21)를 통하여 비데오 출력신호를 출력시키게 된다.The color signals R, G, and B thus output are applied to the process 16 through the low pass filters 11-13, and the luminance signal Y passes through the low pass filter 10 and then the luminance signal amplification part. And to the process 16 via the luminance signal contour 15. Therefore, in the process 16 to which the white balance 17 is connected, the output signal BY, Y, and RY are generated by the luminance signal Y and the color signals R, G, and B, and the synchronization signal of the synchronization generator 19 is generated. By applying to the encoder 20 to be applied, the encoder 20 outputs a video output signal through the amplifier 21.
이상에서와 같이 본 고안은 종래와는 다르게 매트릭스부와 차동 증폭기를 통하여 휘도 신호(Y)와 색 신호(R, G, B)를 합성시키므로 이러한 비데오 신호를 출력시키는 비데오 카메라의 감도가 좋아지게 되고 색흐림과 색번짐 등이 없어지기 때문에 해상도가 향상되는 효과가 있는 것이다.As described above, the present invention synthesizes the luminance signal (Y) and the color signals (R, G, B) through the matrix unit and the differential amplifier, unlike the prior art, the sensitivity of the video camera outputting such a video signal is improved. Since color blur and color blur are eliminated, the resolution is improved.
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KR2019870006143U KR900008517Y1 (en) | 1987-04-24 | 1987-04-24 | Chrominance signal composition circuit |
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KR2019870006143U KR900008517Y1 (en) | 1987-04-24 | 1987-04-24 | Chrominance signal composition circuit |
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KR880020890U KR880020890U (en) | 1988-11-30 |
KR900008517Y1 true KR900008517Y1 (en) | 1990-09-22 |
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KR2019870006143U KR900008517Y1 (en) | 1987-04-24 | 1987-04-24 | Chrominance signal composition circuit |
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