KR960010679Y1 - Comb filter - Google Patents
Comb filter Download PDFInfo
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- KR960010679Y1 KR960010679Y1 KR2019930013658U KR930013658U KR960010679Y1 KR 960010679 Y1 KR960010679 Y1 KR 960010679Y1 KR 2019930013658 U KR2019930013658 U KR 2019930013658U KR 930013658 U KR930013658 U KR 930013658U KR 960010679 Y1 KR960010679 Y1 KR 960010679Y1
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- 239000002131 composite material Substances 0.000 claims description 36
- 230000003111 delayed effect Effects 0.000 claims description 23
- 238000001514 detection method Methods 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
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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
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Abstract
내용 없음.No content.
Description
제1도는 종래의 콤필터의 구성을 보인 회로도.1 is a circuit diagram showing the configuration of a conventional comb filter.
제2도는 일반적인 NTSC방식 합성영상신호의 2차원공간 그래프.2 is a two-dimensional spatial graph of a general NTSC composite video signal.
제3도는 종래의 콤필터의 특성을 보인 2차원 공간 그래프.3 is a two-dimensional spatial graph showing the characteristics of a conventional comb filter.
제4도는 본 고안의 콤필터의 구성을 보인 회로도.4 is a circuit diagram showing the configuration of the comb filter of the present invention.
제5도의 (a)-(d)는 제4도의 각부의 출력신호를 보인 2차원 공간 그래프.(A)-(d) of FIG. 5 are two-dimensional spatial graphs showing output signals of respective parts of FIG.
제6도는 제4도의 3.58MHz 트랩회로의 동작특성을 보인 2차원 공간 그래프.6 is a two-dimensional spatial graph showing the operating characteristics of the 3.58 MHz trap circuit of FIG.
* 도면의 주요 부분에 대한 부호의 설명* Explanation of symbols for the main parts of the drawings
100 : 지연부 200 : 색도신호 검출부Delay unit 200 Chromaticity signal detection unit
300 : 휘도신호 검출부 400 : 보정 휘도신호 출력부300: luminance signal detection unit 400: correction luminance signal output unit
410 : ±3.58MHz 트랩회로 420 : 수직보정량 조절부410: ± 3.58 MHz trap circuit 420: Vertical compensation amount adjustment unit
430 : 가산기 CV : 합성영상신호430: adder CV: composite video signal
본 고안은 합성영상신호에서 휘도신호와 색도신호를 분리하여 출력하는 콤필터에 관한 것으로, 특히 합성영상신호에서 휘도신호를 정확히 분리하여 수직방향의 윤곽을 보정하고, 수직해상도의 열화를 개선할 수 있도록 하는 콤필터에 관한 것이다.The present invention relates to a comb filter that separates and outputs a luminance signal and a chroma signal from a composite video signal. In particular, the luminance signal can be accurately separated from the composite video signal, thereby correcting the vertical outline and improving the degradation of the vertical resolution. It is about comb filter to make.
종래의 콤필터는 제1도는 도시된 바와 같이, 입력되는 합성영상신호(CV)를 지연시켜 1H(여기서, H는 수평동기신호의 주파수임) 및 2H 지연 합성영상신호를 출력하는 1H지연기(11)(12)로 된 지연부(10)와, 상기 지연부(10)와, 상기 지연부(10)에서 출력되는 2H지연 합성영상신호를 출력하는 1H지연기(11)(12)로 된 지연부(10)와, 상기 지연부(10)에서 출력되는 2H지연 합성영상신호를 합성영상신호(CV)와 가산한 후 지연부(10)에서 출력되는 1H지연합성영상신호에서 감산하여 색도신호로 출력하는 가산기(21, 24), 1/2증폭기(22, 25) 및 인버터(23)로 된 색도신호 검출부(20)와, 상기 지연부(10)에서 출력되는 1H지연 합성영상신호에서 상기 색도신호 검출부(20)의 출력신호를 감산하여 휘도신호로 출력하는 인버터(31) 및 가산기(32)로 된 휘도신호 검출부(30)로 구성하였다.In the conventional comb filter, as shown in FIG. 1, a 1H delay unit for delaying an input composite video signal CV to output 1H (where H is a frequency of a horizontal synchronization signal) and a 2H delay composite video signal ( 11) a delay unit 10 consisting of 12, a delay unit 10, and a 1H delay unit 11, 12 for outputting a 2H delayed composite video signal outputted from the delay unit 10; The delay unit 10 and the 2H delayed composite video signal output from the delay unit 10 are added to the composite video signal CV, and then subtracted from the 1H delayed composite video signal output from the delay unit 10 to perform a chromaticity signal. The chroma signal detector 20 includes an adder 21, 24, a half amplifier 22, 25, and an inverter 23, and a 1H delayed composite video signal output from the delay unit 10. It consists of an inverter 31 which subtracts the output signal of the chromaticity signal detection unit 20 and outputs it as a luminance signal, and a luminance signal detection unit 30 which is an adder 32.
이와같이 구성된 종래의 콤필터는 입력되는 합성영상신호(CV)가 지연부(10)의 1H지연기(11)를 통해 1H 지연되어 출력됨과 아울러 1H지연기(12)에서 다시 1H 지연되어 출력된다.In the conventional comb filter configured as described above, the input composite video signal CV is output by being delayed by 1H through the 1H delay unit 11 of the delay unit 10 and is further output by being delayed by 1H again in the 1H delay unit 12.
1H지연기(12)에서 출력되는 2H지연 합성영상신호는 색도신호 검출부(20)의 가산기(21)에 입력되어 합성영상신호(CV)와 가산되고, 1/2증폭기(22)에서 1/2배증폭되며 인버터(23)에서 반전된 후 1H지연기(11)에서 출력되는 1H지연 합성영상신호와 함께 가산기(24)에 입력되어 가산되며, 가산기(24)의 출력신호는 1/2증폭기(25)에서 1/2배 증폭되어 색도신호가 출력된다.The 2H delayed composite video signal output from the 1H delay unit 12 is input to the adder 21 of the chromaticity signal detection unit 20 and added with the composite video signal CV, and 1/2 in the 1/2 amplifier 22. After being doubled and inverted by the inverter 23, the input signal is added to the adder 24 together with the 1H delayed composite video signal output from the 1H delay unit 11, and the output signal of the adder 24 is added to the 1/2 amplifier ( 25) is amplified 1/2 times to output the chroma signal.
이와 같이 색도신호 검출부(20)에서 출력되는 색도신호는 휘도신호 검출부(30)의 인버터(31)를 통해 반전되고, 1H지연 합성영상신호와 함께 가산기(32)에 입력되어 가산 및 휘도신호가 출력된다.In this way, the chroma signal output from the chroma signal detector 20 is inverted through the inverter 31 of the luminance signal detector 30 and input to the adder 32 together with the 1H delayed composite video signal to output the addition and luminance signals. do.
이러한 종래의 콤필터에 있어서, 먼저 NTSC방식 합성영상신호의 특성을 살펴보면, 제2도에 도시된 바와 같이 수직 및 수평방향의 2차원 공간에서 휘도신호와 색도신호가 분포 즉, 휘도신호는, 수평방향으로 -4.2MHz부터 +4.2MHz대역 사이 및 수직방향으로 -525/2CPh부터 +525/2CPh 대역 사이에 분포되고, 색도신호는 수평방향으로 ±3.58MHz위치 및 수직방향으로 ±525/4CPh에 상하좌우 대칭형태로 집중 분포된다.In the conventional comb filter, first, the characteristics of the NTSC-type composite video signal are distributed. As shown in FIG. 2, the luminance signal and the chroma signal are distributed in the vertical and horizontal two-dimensional spaces, that is, the luminance signal is horizontal. Direction is distributed between -4.2MHz to + 4.2MHz band and vertically between -525 / 2CPh to + 525 / 2CPh band, and chroma signal is up and down at ± 3.58MHz in horizontal direction and ± 525 / 4CPh in vertical direction. It is distributed symmetrically.
그러므로 상기와 같이 1H지연 합성영상신호에 색도신호를 단순히 감산하여 휘도신호로 출력 즉, 색도신호를 반전시킨 후 1H지연 합성영상신호와 가산하여 휘도신호로 출력하게 되면, 제3도에 도시된 바와 같이 수직방향으로 ±525/4CPh 대역의 휘도신호는 출력되지 않게 되고, 이로 인하여 수직 해상도가 열화되어 화질이 저하되는 문제점이 있었다.Therefore, as shown in FIG. 3, when the 1H delayed composite video signal is simply subtracted and output as a luminance signal, that is, the chroma signal is inverted and added to the 1H delayed composite video signal to output the luminance signal. Likewise, the luminance signal of ± 525 / 4CPh band is not output in the vertical direction, which causes a problem in that the vertical resolution is deteriorated and the image quality is deteriorated.
본 고안은 상기와 같은 종래의 제반 문제점을 해결하기 위하여 안출한 것으로서, 검출한 색도신호에서 ±3.58MHz 대역의 색도신호를 제거하여 휘도신호를 검출하고, 검출한 휘도신호를 수직 보정한 후 휘도신호 검출부의 출력신호와 가산하여 출력함으로써 수직방향으로 ±525/4CPh 대역에 분포되는 휘도신호를 비상하여 수직 해상도를 향상시킬 수 있도록 하는 콤필터를 제공하는데 그 목적이 있는 것으로 이를 첨부된 제4도 내지 제6도의 도면을 찬조하여 상세히 설명한다.The present invention has been made to solve the above-mentioned conventional problems. The luminance signal is detected by removing the chromaticity signal of ± 3.58MHz band from the detected chromaticity signal, and the luminance signal is vertically corrected after the luminance signal is vertically corrected. It is an object of the present invention to provide a comb filter capable of improving the vertical resolution by adding the output signal to the detection unit and outputting the luminance signal distributed in the ± 525 / 4CPh band in the vertical direction. It will be described in detail with reference to the drawings of FIG.
제4도는 본 고안의 콤필터의 휘로도로서 이에 도시된 바와 같이, 입력되는 합성영상신호(CV)를 지연시켜 1H 및 2H 지연 합성영상신호를 출력하는 1H지연기 (110)(120)로 된 지연부(100)와, 상기 지연부(100)에서 출력되는 1H지연 합성영상신호를 합성영상신호(CV)와 가산한 후 지연부(100)에서 출력되는 1H지연 합성영상신호에서 감산하여 색도신호로 출력되는 가산기(210, 240), 1/2증폭기(220, 250) 및 인버터(230)로 된 색도신호 검출부(200)와, 상기 지연부(100)에서 출력되는 1H지연합성영상신호에서 상기 색도신호 검출부(200)의 출력신호를 감산하여 휘도신호로 출력하는 인버터(310) 및 가산기(320)로 된 휘도신호 검출부(300)와, 상기 색도신호검출부(200)의 출력신호에서 ±3.58MHz 대역의 색도신호를 제거한 후 상기 휘도신호 검출부(300)의 출력신호에 가산하여 보정 휘도신호를 출력하는 ±3.58MHz 트랩회로(410), 수직보정량 조절부(420) 및 가산기(430)로 된 보정 휘도신호 출력부(400)로 구성하였다.4 is a diagram of a comb filter of the present invention, as shown in FIG. 1, which includes a 1H delay unit 110 and 120 for delaying an input composite video signal CV and outputting 1H and 2H delayed composite video signals. The delay unit 100 and the 1H delayed composite video signal output from the delay unit 100 are added to the composite video signal CV, and then subtracted from the 1H delayed composite video signal output from the delay unit 100 to obtain a chromaticity signal. The chroma signal detector 200 includes an adder 210 and 240, a half amplifier 220 and 250, and an inverter 230, and the 1H delayed composite video signal output from the delay unit 100. ± 3.58 MHz from the output signal of the luminance signal detection unit 300 and the inverter 310 and the adder 320 which subtracts the output signal of the chromaticity signal detection unit 200 and outputs the luminance signal as the luminance signal. After removing the chroma signal of the band, it is added to the output signal of the luminance signal detector 300 to correct the luminance signal. ± outputting was composed of 3.58MHz trap circuit 410, a vertical correction control unit 420 and the adder 430, the luminance correction signal output section 400 and sent.
이와 같이 구성된 본 고안의 콤필터는 입력되는 합성영상신호(CV)가 지연부(100)의 1H지연기(110)를 통해 1H지연되어 출력됨과 아울러 1H지연기(120)에서 다시 1H 지연되어 출력되고, 1H지연기(120)에서 출력되는 2H지연 합성영상신호는 색도신호 검출부(200)의 가산기(210)에서 합성영상신호(CV)와 가산되고 1/2증폭기(220)를 통해 인버터(230)에서 반전된 후 1H지연기(110)에서 출력되는 1H지연 합성영상신호와 가산기(240)에서 가산되며, 가산기(240)의 출력신호는 1/2증폭기(250)를 통해 색도신호로 출력된다.In the comb filter of the present invention configured as described above, the input composite video signal CV is outputted by 1H delay through the 1H delay unit 110 of the delay unit 100 and is further delayed by 1H in the 1H delay unit 120. The 2H delayed composite video signal output from the 1H delayer 120 is added to the composite video signal CV by the adder 210 of the chromaticity signal detector 200 and is converted to the inverter 230 through the 1/2 amplifier 220. 1H delayed composite video signal output from the 1H delay unit 110 and the adder 240, and the output signal of the adder 240 is output as a chroma signal through the 1/2 amplifier 250 .
색도신호 검출부(200)에서 출력되는 색도신호는 휘도신호 검출부(300)의 인버터(310)를 통해 반전되고, 1H지연 합성영상신호와 가산기(320)에서 가산 및 휘도신호로 출력된다.The chroma signal output from the chroma signal detector 200 is inverted through the inverter 310 of the luminance signal detector 300, and is output as an addition and luminance signal from the 1H delayed composite video signal and the adder 320.
또한 색도신호 검출부(200)에서 출력되는 색도신호는 보정 휘도신호 출력부(400)의 ±3.5MHz 트랩회로(410)를 통해 수평방향으로 3.58MHz 대역의 신호가 제거되고, 수직보정량 조절부(420)에서 적절한 수직보정레벨로 조절된 후 가산기(430)에서 휘도신호 검출부(300)가 출력하는 휘도신호와 가산되어 보정 휘도신호로 출력된다.In addition, the chroma signal output from the chroma signal detector 200 removes the signal of the 3.58 MHz band in the horizontal direction through the ± 3.5 MHz trap circuit 410 of the corrected luminance signal output unit 400, and the vertical compensation amount adjuster 420. After adjusting to an appropriate vertical correction level, the adder 430 is added to the luminance signal output from the luminance signal detector 300 and output as a correction luminance signal.
이러한 본 고안의 콤필터에 있어서 색도신호 검출부(200)에서 출력되는 색도신호는 제5도의 (a)에 도시된 바와같이 수직방향으로 ±525/4CPh 대역의 신호가 출력된다.In the comb filter of the present invention, the chroma signal output from the chroma signal detection unit 200 outputs a signal of ± 525 / 4CPh band in the vertical direction as shown in (a) of FIG.
그리고 ±3.58MHz 트랩회로(410)는 제6도에 도시된 바와 같이 수평방향으로 ±3.58MHz 대역의 신호를 제거하여 출력하는 것으로 색도신호 검출부(300)에서 출력되는 색도신호는 ±3.58MHz 트랩회로(410)를 통해 제5도의 (b)에 도시된 바와 같이 ± 3.58MHz 대역의 신호가 제거되어 출력되고, ±3.58MHz 트랩회로(410)의 출력신호는 수직보정량 조절부(420)에서 수직레벨이 조정된 후 휘도신호 검출부(300)에서 제5도의(c)에 도시된 바와같이 출력되는 휘도신호와 가산기 (430)에서 가산되어 제5도의 (d)에 도시된 바와 같이 수직방향으로 ±525/4CPh 대역에 분포되는 휘도신호가 보상 출력된다.The ± 3.58 MHz trap circuit 410 removes and outputs a signal of the ± 3.58 MHz band in the horizontal direction as shown in FIG. 6. The chroma signal output from the chroma signal detector 300 is a ± 3.58 MHz trap circuit. As shown in (b) of FIG. 5 through 410, a signal of ± 3.58 MHz band is removed and output, and the output signal of the ± 3.58 MHz trap circuit 410 is vertically leveled by the vertical compensation controller 420. After the adjustment is made, the luminance signal detected by the luminance signal detection unit 300 as shown in (c) of FIG. 5 and added by the adder 430 is ± 525 in the vertical direction as shown in (d) of FIG. The luminance signal distributed in the / 4CPh band is compensated for.
이상에서 상세히 설명한 바와 같이 본 고안은 휘도신호 검출부가 검출한 휘도신호에서 수직방향으로 ±525/4CPh 대역에 분포되는 휘도신호를 보상하여 출력함으로써 수직 윤곽이 보정되어 수직 해상도가 향상되는 효과가 있다.As described in detail above, the present invention compensates the luminance signal distributed in the ± 525 / 4CPh band in the vertical direction from the luminance signal detected by the luminance signal detector, thereby correcting the vertical contour, thereby improving the vertical resolution.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019930013658U KR960010679Y1 (en) | 1993-07-22 | 1993-07-22 | Comb filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019930013658U KR960010679Y1 (en) | 1993-07-22 | 1993-07-22 | Comb filter |
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| Publication Number | Publication Date |
|---|---|
| KR950005147U KR950005147U (en) | 1995-02-18 |
| KR960010679Y1 true KR960010679Y1 (en) | 1996-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019930013658U Expired - Fee Related KR960010679Y1 (en) | 1993-07-22 | 1993-07-22 | Comb filter |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR960010679Y1 (en) |
-
1993
- 1993-07-22 KR KR2019930013658U patent/KR960010679Y1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| KR950005147U (en) | 1995-02-18 |
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