KR950007574A - Video signal luminance signal / color signal separation circuit - Google Patents

Video signal luminance signal / color signal separation circuit Download PDF

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Publication number
KR950007574A
KR950007574A KR1019930017218A KR930017218A KR950007574A KR 950007574 A KR950007574 A KR 950007574A KR 1019930017218 A KR1019930017218 A KR 1019930017218A KR 930017218 A KR930017218 A KR 930017218A KR 950007574 A KR950007574 A KR 950007574A
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KR
South Korea
Prior art keywords
signal
low pass
pass filter
separation circuit
output
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KR1019930017218A
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Korean (ko)
Inventor
임한섭
김재관
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배순훈
대우전자 주식회사
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Application filed by 배순훈, 대우전자 주식회사 filed Critical 배순훈
Priority to KR1019930017218A priority Critical patent/KR950007574A/en
Publication of KR950007574A publication Critical patent/KR950007574A/en

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Abstract

본 발명은 Y/C 분리시 발생되는 수직 해상도의 열화를 개선하여 Y/C 분리시의 신호 열화를 개선시킬 수 있는 영상신호의 휘도/색신호 분리회로에 관한 것으로 복합 영상 신호에서 Y저역 신호를 추출하는 제1로우 패스 필터(9), 복합 영상 신호중의 저역 신호 성분을 추출하는 제2로우 패스 필터(13), 제1가산기(3) 출력을 지연시키는 지연부(14), 제2로우 패스 필터(13)와 지연부(14) 출력을 감산하는 제2감산기(15), 제1로우 패스 필터(9)와 제2감산기(15) 출력으로부터 양질의 Y신호를 출력하는 제3가산기(16)를 선행하는 Y/C분리회로의 빗살형 필터(8)에 접속하여 이루어진다.The present invention relates to a luminance / color signal separation circuit of a video signal capable of improving signal degradation in Y / C separation by improving degradation of vertical resolution generated in Y / C separation. A first low pass filter 9, a second low pass filter 13 for extracting low-pass signal components of the composite video signal, a delay unit 14 for delaying the output of the first adder 3, and a second low pass filter A second subtractor 15 subtracting the output of the delay section 14 and a third adder 16 outputting a high quality Y signal from the first low pass filter 9 and the second subtractor 15 output; Is connected to the comb-shaped filter 8 of the preceding Y / C separation circuit.

Description

영상신호의 휘도신호/색신호 분리회로Video signal luminance / color signal separation circuit

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

제1도는 종래 휘도신호/색신호 분리 과정을 설명하기 위한 블록도,1 is a block diagram illustrating a conventional luminance signal / color signal separation process;

제2도는 종래 빗살형 필터의 동작을 설명하기 위한 파형도,2 is a waveform diagram for explaining the operation of the conventional comb filter,

제3도는 상관검출기의 동작을 나타내는 파형도,3 is a waveform diagram showing the operation of the correlation detector,

제4도는 종래 스위치와 밴드 패스 필터의 동작을 나타내는 파형도로 (A)는 시간축에서의 동작 파형도이며, (B)는 비상관시의 주파수축에서의 밴드 패스 필터 특성도.4 is a waveform diagram showing the operation of a conventional switch and a band pass filter (A) is an operation waveform diagram on the time axis, and (B) is a band pass filter characteristic diagram on the frequency axis at uncorrelation.

Claims (4)

입력되는 복합 영상 신호로부터 휘도신호와 색신호를 분리하는 빗살형 필터 수단(8)을 포함하는 영상 신호의 휘도신호/색신호 분리 회로에 있어서, 상기 복합 영상 신호로부터 Y저역 신호를 추출하는 제1로우 패스필터수단(9)과; 상기 제1가산수단(3)의 출력으로부터의 복합 영상신호중의 저역 신호 성분을 추출하는 제2로우 패스 필터 수단(13)과; 상기 제1가산수단(3)의 출력을 일정시간 지연시키는 지연수단(14)과; 상기 제2로우 패스 필터 수단(13)과 지연수단(14) 출력신호를 감산하여 Y신호의 고역 성분을 추출하는 제2감산수단(15)과; 상기 제1로우 패스수단(9)과 제2감산수단(15)으로부터의 신호를 가산하여 Y신호를 출력하는 제3가산수단(16)을 더 포함하는 영상신호의 휘도신호/색신호 분리 회로.A luminance signal / color signal separation circuit of a video signal comprising a comb-shaped filter means (8) for separating a luminance signal and a color signal from an input composite video signal, comprising: a first low pass for extracting a Y low pass signal from the composite video signal Filter means 9; Second low pass filter means (13) for extracting low-pass signal components in the composite video signal from the output of said first adding means (3); Delay means (14) for delaying the output of said first adding means (3) for a predetermined time; Second subtraction means (15) for subtracting the output signals of the second low pass filter means (13) and the delay means (14) to extract the high frequency components of the Y signal; And a third addition means (16) for adding the signals from said first low pass means (9) and said second subtraction means (15) to output a Y signal. 제1항에 있어서, 상기 지연수단(14)은 상기 제2로우 패스 필터 수단(13)의 지연시간과 동일한 시간동안 지연 동작하는 것을 특징으로 하는 영상신호의 휘도신호/색신호 분리회로.2. The luminance signal / color signal separation circuit according to claim 1, characterized in that the delay means (14) is delayed for a time equal to the delay time of the second low pass filter means (13). 제1항에 있어서, 상기 제1로우 패스 필터 수단(9)과 상기 제2로우 패스 필터수단(13)의 특성은 동일한 것을 특징으로 하는 영상 신호의 휘도신호/색신호 분리회로.2. A luminance signal / color signal separation circuit according to claim 1, characterized in that the characteristics of the first low pass filter means (9) and the second low pass filter means (13) are the same. 제1항에 있어서, 상기 제1로우 패스 필터수단(9)의 출력을 상기 제1가산수단(3)에 의해 Y신호의 레벨 커짐량(2배)만큼을 증폭부(17)에 의해 증폭하는 것을 특징으로 하는 영상신호의 휘도신호/색신호 분리회로.The amplifying unit (17) according to claim 1, wherein the amplifying unit (17) amplifies the output of the first low pass filter means (9) by the first adding means (3) by a level increase amount (two times) of the Y signal. A luminance signal / color signal separation circuit of an image signal. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930017218A 1993-08-31 1993-08-31 Video signal luminance signal / color signal separation circuit KR950007574A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930017218A KR950007574A (en) 1993-08-31 1993-08-31 Video signal luminance signal / color signal separation circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930017218A KR950007574A (en) 1993-08-31 1993-08-31 Video signal luminance signal / color signal separation circuit

Publications (1)

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KR950007574A true KR950007574A (en) 1995-03-21

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