KR940017908A - Color signal demodulation device with feedforward automatic phase control - Google Patents

Color signal demodulation device with feedforward automatic phase control Download PDF

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Publication number
KR940017908A
KR940017908A KR1019920025221A KR920025221A KR940017908A KR 940017908 A KR940017908 A KR 940017908A KR 1019920025221 A KR1019920025221 A KR 1019920025221A KR 920025221 A KR920025221 A KR 920025221A KR 940017908 A KR940017908 A KR 940017908A
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South Korea
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color
signal
demodulation
phase
feedforward
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KR0165257B1 (en
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반영균
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윤종용
삼성전자 주식회사
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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

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

Abstract

피드포워드 자동위상제어기능을 갖는 색신호복조장치는 색신호복조회로에서 출력되는 신호를 색버스트구간만큼만 지연하여 피드포워드 APC를 수행하도록 하여 회로의 사이즈를 축소한 것이다.A color signal demodulation device having a feedforward automatic phase control function reduces the size of a circuit by delaying a signal output from a color signal demodulation circuit by only a color burst section to perform a feedforward APC.

이를 위하여 인가되는 색신호의 컬러버스트신호가 복조용 캐리어신호의 위상에 일치하도록 위상을 조절하여 기저대역의 색차신호를 각각 출력하는 색복조회로; 색복조회로에서 출력되는 색차신호의 컬러버스트의 위상을 비교하여 위상오차를 검출하기 위한 위상오차검출기; 색복조회로에서 출력되는 색차신호를 색신호의 컬러버스트 신호 발생구간만큼 지연하여 출력하기 위한 지연수단; 및 지연수단에서 출력되는 신호와 위상오차검출기에서 출력되는 신호에 의하여 피드포워드 자동위상제어하여 복조오차를 제거한 색신호를 출력하는 피드포워드 자동위상제어기를 포함하도록 구성된다.A color demodulation circuit for outputting a baseband color difference signal by adjusting a phase so that a color burst signal of a color signal applied for this purpose matches a phase of a carrier signal for demodulation; A phase error detector for detecting a phase error by comparing phases of color bursts of a color difference signal output from the color demodulation circuit; Delay means for delaying and outputting the color difference signal output from the color demodulation circuit by the color burst signal generation period of the color signal; And a feedforward autophase controller for outputting a color signal from which demodulation errors are eliminated by feedforward autophase control by a signal output from a delay means and a signal output from a phase error detector.

Description

피드포워드 자동위상제어기능을 갖는 색신호복조장치Color signal demodulation device with feedforward automatic phase control

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

제6도는 본 발명에 따른 피드포워드 자동위상제어기능을 갖는 색신호복조장치의 블럭도. 제7A~7F도는 제6도에 도시된 장치의 각부의 출력타이밍도.6 is a block diagram of a color signal demodulation device having a feedforward automatic phase control function according to the present invention. 7A to 7F are output timing diagrams of respective parts of the apparatus shown in FIG.

Claims (1)

피드포워드 자동위상제어기능을 이용하여 입력되는 색신호를 지저대역으로 복조해 주는 색신호복조장치에 있어서; 인가되는 색신호의 컬러버스트신호가 복조용 캐리어신호의 위상에 일치하도록 위상을 조절하여 기저대역의 색차신호를 각각 출력하는 색복조회로; 상기 색복조회로에서 출력되는 색차신호의 컬러버스트의 위상을 비교하여 위상오차를 검출하기 위한 위상오차검출기; 상기 색복조회로에서 출력되는 상기 색차신호를 상기 색신호의 컬러버스트신호 발생구간만큼 지연하여 출력하기 위한 지연수단; 및 상기 지연수단에서 출력되는 신호와 상기 위상오차검출기에서 출력되는 신호에 의하여 피드포워드 자동위상제어하여 복조오차를 제거한 색신호를 출력하는 피드포워드 자동위상제어기를 포함함을 특징으로 하는 피드포워드 자동위상제어기능을 갖는 색신호복조장치.A color signal demodulation device for demodulating an input color signal into a baseband using a feedforward automatic phase control function; A color demodulation circuit for outputting a baseband color difference signal by adjusting a phase so that a color burst signal of an applied color signal matches a phase of a demodulation carrier signal; A phase error detector for detecting a phase error by comparing a phase of a color burst of a color difference signal output from the color demodulation circuit; Delay means for delaying and outputting the color difference signal output from the color demodulation circuit by a color burst signal generation period of the color signal; And a feedforward autophase controller for outputting a color signal from which demodulation errors are eliminated by feedforward autophase control by a signal output from the delay means and a signal output from the phase error detector. Color signal demodulation device having a function. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920025221A 1992-12-23 1992-12-23 The color signal recording apparatus with feed forward auto phase control function Expired - Fee Related KR0165257B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920025221A KR0165257B1 (en) 1992-12-23 1992-12-23 The color signal recording apparatus with feed forward auto phase control function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920025221A KR0165257B1 (en) 1992-12-23 1992-12-23 The color signal recording apparatus with feed forward auto phase control function

Publications (2)

Publication Number Publication Date
KR940017908A true KR940017908A (en) 1994-07-27
KR0165257B1 KR0165257B1 (en) 1999-03-20

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KR0165257B1 (en) 1999-03-20

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