KR910016194A - High resolution video signal demodulation circuit - Google Patents

High resolution video signal demodulation circuit Download PDF

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Publication number
KR910016194A
KR910016194A KR1019900002614A KR900002614A KR910016194A KR 910016194 A KR910016194 A KR 910016194A KR 1019900002614 A KR1019900002614 A KR 1019900002614A KR 900002614 A KR900002614 A KR 900002614A KR 910016194 A KR910016194 A KR 910016194A
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KR
South Korea
Prior art keywords
signal
color
frequency
filter
luminance
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KR1019900002614A
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Korean (ko)
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KR0140694B1 (en
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이창준
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강진구
삼성전자 주식회사
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Priority to KR1019900002614A priority Critical patent/KR0140694B1/en
Publication of KR910016194A publication Critical patent/KR910016194A/en
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/44Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/455Demodulation-circuits
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/015High-definition television systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/77Circuits 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
    • H04N9/78Circuits 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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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

내용 없음No content

Description

고해상도 영상신호 복조회로High resolution video signal demodulation circuit

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

제1도는 본 발명에 의한 비디오신호 복조회로도.1 is a video signal demodulation circuit diagram according to the present invention.

Claims (6)

텔레비젼수신기에 있어서, 복합영상 신호로 부터 저역성분의 색신호에 대한 반송파신호와 휘도신호를 분리하기 위한 제1여파수단과, 상기 복합영상신호로 부터 고역의 색신호에 대한 방송파신호를 분리하기 위한 제2여파수단과, 상기 복합영상신호로 부터 고역의 휘도신호를 분리하기 위한 제3여파수단과, 상기 고역 및 저역의 휘도 신호와 상기 고역 및 저역의 색부반송파신호를 합성하고 복조하여 색신호들을 발생하는 색복조수단을 포함함을 특징으로 하는 고해상도 영상신호 복조회로.1. A television receiver comprising: first filtering means for separating a carrier signal and a luminance signal for a low frequency component color signal from a composite video signal; and a first filter for separating a broadcast wave signal for a high frequency color signal from the composite video signal. A second filter means, a third filter means for separating a high-frequency luminance signal from the composite video signal, and combining and demodulating the high- and low-frequency luminance signals and the high- and low-frequency color subcarrier signals to generate color signals. A high resolution video signal demodulation circuit comprising color demodulation means. 제1항에 있어서, 제2여파수단이 입력단(IP)을 통해 유입되는 복합 영상신호로 부터 고역의 색신호에 대한 색부반송파신호를 분리하는 제1여파기(21)와, 상기 제1여파기(21)의 출력인 고역의 색신호에 대한 색부반송파신호를 라인(1)을 통해 제1국부발진주파수에 주파수 변환하여 상기 고역의 색신호에 대한 색부반송파 신호중에 포함된 부반송파를 제거하는 제1혼합기(22)를 포함함을 특징으로 하는 고해상도 영상신호 복조회로.2. The first filter 21 of claim 1, wherein the second filter means separates a color carrier signal for a color signal of a high frequency from a composite video signal flowing through an input terminal IP. A first mixer 22 for frequency-converting the color subcarrier signal for the high frequency color signal, which is the output of the subcarrier, to the first local oscillation frequency to remove subcarriers included in the color subcarrier signal for the high frequency color signal. High resolution video signal demodulation circuit comprising a. 제1항에 있어서, 제3여파수단이 입력단(IP)를 통해 유입되는 복합 영상신호로 부터 고역의 휘도신호에 대한 휘도반송파신호를 분리하는 제2여파기(31)와, 상기 제2여파기(31)의 출력인 휘도반송파신호를 제2국부발진주파수에 의해 주파수변환하여 상기 휘도반송파 신호로 부터 고역의 휘도신호를 추출하는 혼합기(32)을 포함함을 특징으로 하는 고해상도 영상신호 복조회로.2. The second filter (31) according to claim 1, wherein the third filter means separates the luminance carrier signal for the high-frequency luminance signal from the composite video signal flowing through the input terminal (IP) and the second filter (31). And a mixer (32) for frequency-converting the luminance carrier signal, which is the output of the PSI, by a second local oscillation frequency, to extract a high-frequency luminance signal from the luminance carrier signal. 제2항 및 제3항에 있어서, 상기 제1국부발진주파수와 상기 제2국부발진주파수의 주파수대역을 다르게 설정함을 특징으로 하는 고해상도 영상신호 복조회로.4. The high resolution video signal demodulation circuit according to claim 2 or 3, wherein frequency bands of the first local oscillation frequency and the second local oscillation frequency are set differently. 제1항에 있어서, 색복조수단이 상기 제1여파수단(10)으로 부터 인입되는 저역이 색신호에 대한 색부반송파 신호와 상기 제2여파수단(20)으로 부터 인입되는 고역의 색신호에 대한 색부반송파신호를 합성하는 제1가산기(41)와, 상기 제1여파수단(10)으로 부터 인입되는 저역의 휘도신호와 상기 제3여파수단(30)으로 부터 인입되는 고역의 휘도신호를 합성하는 제2가산기(42)와, 상기 제1가산기(41)의 출력인 합성된 색부반송파신호를 복조하여 색차신호를 발생하는 매트릭스부(43)와, 상기 매트릭스부(43)의 출력인 색차신호들을 각각 상기 제2가산기(41)의 출력인 합성된 휘도신호와 가산하여 색신호들을 추출한 다음 출력포트(OP1 ~ OP3)을 통해 송출하는 제3가산기(44)를 포함함을 특징으로 하는 고해상도 영상신호 복조회로.2. A color subcarrier according to claim 1, wherein a color demodulation means receives a color subcarrier signal for a low pass color signal from the first filter means 10 and a high frequency color signal for retrieving from the second filter means 20. A first adder 41 for synthesizing a signal, a second low-frequency luminance signal input from the first filtering means 10, and a second high-frequency luminance signal incoming from the third filtering means 30; An adder 42, a matrix unit 43 for generating a color difference signal by demodulating the synthesized color carrier signal, which is the output of the first adder 41, and color difference signals which are outputs of the matrix unit 43, respectively; And a third adder 44 which extracts the color signals by adding the synthesized luminance signal which is the output of the second adder 41 and then outputs them through the output ports OP1 to OP3. . 제5항에 있어서, 색복조수단이 상기 제1여파수단(10)과 상기 제2가산기(41) 사이에 접속된 제3여파기(45)와, 상기 제1여파수단(10)과 상기 제2가산기(42) 사이에 접속된 제4여파기(46)와, 상기 제2여파수단(20)과 상기 제1가산기(41) 사이에 접속된 제5여파기(47)와, 상기 제3여파수단(30)과 상기 제2가산기(42) 사이에 접속된 제6여파기(48)를 더 구비하여 저역 및 고역의 휘도신호와 고역 및 저역의 색신호에 대한 색부반송파 신호의 에일리어 징을 제거함을 특징으로 하는 고해상도 영상신호 복조회로.6. A color filter according to claim 5, wherein a color demodulation means is connected between the first filter means (10) and the second adder (41), and the first filter means (10) and the second filter. A fourth filter 46 connected between the adder 42, a fifth filter 47 connected between the second filter means 20 and the first adder 41, and the third filter means ( 30) and a sixth filter 48 connected between the second adder 42 to remove aliasing of the color subcarrier signal for the low and high luminance signals and the high and low color signals. High resolution video signal demodulation circuit. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019900002614A 1990-02-28 1990-02-28 High resolution image signal decoding circuit KR0140694B1 (en)

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Application Number Priority Date Filing Date Title
KR1019900002614A KR0140694B1 (en) 1990-02-28 1990-02-28 High resolution image signal decoding circuit

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Application Number Priority Date Filing Date Title
KR1019900002614A KR0140694B1 (en) 1990-02-28 1990-02-28 High resolution image signal decoding circuit

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KR910016194A true KR910016194A (en) 1991-09-30
KR0140694B1 KR0140694B1 (en) 1998-06-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100317352B1 (en) * 1994-12-09 2002-02-19 구자홍 Video signal vertical converter of tv system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100317352B1 (en) * 1994-12-09 2002-02-19 구자홍 Video signal vertical converter of tv system

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