KR970078675A - Color Burst Signal Positioner - Google Patents

Color Burst Signal Positioner Download PDF

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Publication number
KR970078675A
KR970078675A KR1019960018591A KR19960018591A KR970078675A KR 970078675 A KR970078675 A KR 970078675A KR 1019960018591 A KR1019960018591 A KR 1019960018591A KR 19960018591 A KR19960018591 A KR 19960018591A KR 970078675 A KR970078675 A KR 970078675A
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South Korea
Prior art keywords
signal
color burst
burst
color
sync
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KR1019960018591A
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Korean (ko)
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KR100190959B1 (en
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조민수
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배순훈
대우전자 주식회사
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Priority to KR1019960018591A priority Critical patent/KR100190959B1/en
Publication of KR970078675A publication Critical patent/KR970078675A/en
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Publication of KR100190959B1 publication Critical patent/KR100190959B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/44—Colour synchronisation
    • H04N9/455—Generation of colour burst signals; Insertion of colour burst signals in colour picture signals or separation of colour burst signals from colour picture signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/66—Digital/analogue converters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/08—Separation of synchronising signals from picture signals

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

Abstract

본 발명은 칼라 버어스트신호 위치 판별장치에 관한 것으로, 종래에는 칼라 버어스트신호의 위치가 신호상태에 의해 바뀌게 되면 영상신호로부터 칼라 버어스트신호를 모두 분리하지 못하여 영상신호가 원색신호로 복조되지 못하거나 칼라 영상신호가 흑백상태로 음극선관에 디스플레이되는 문제점이 있었다. 본 발명은 이런 점을 감안한 것으로 수평 동기신호의 라이징 에지로부터 일정시간 떨어진 곳에 포함되어 있는 칼라 버어스트신호의 위치를 판별하여 표시할 수 있도록 된 칼라 버어스트신호 위치 판별장치를 제공한다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color burst signal position discrimination apparatus. In the related art, when the position of a color burst signal is changed by a signal state, all color burst signals cannot be separated from the video signal, so that the video signal cannot be demodulated as a primary color signal. Or there was a problem that the color image signal is displayed on the cathode ray tube in black and white state. In view of the above, the present invention provides a color burst signal position discrimination apparatus capable of discriminating and displaying the position of a color burst signal included at a certain time away from a rising edge of a horizontal synchronization signal.

Description

칼라 버어스트신호 위치 판별장치Color Burst Signal Positioner

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

제1도는 본 발명의 일실시예에 따른 회로도, 제2도는 제1도의 각 노드점에서 출력되는 출력상태를 보인 파형(칼라 버어스트신호가 정상위치에 포함되어 있는 경우), 제3도는 제1도의 각 노드점에서 출력되는 출력상태를 보인 파형(칼라 버어스트신호가 비정상위치에 포함되어 있는 경우).1 is a circuit diagram according to an embodiment of the present invention, FIG. 2 is a waveform showing an output state output from each node point of FIG. 1 (when a color burst signal is included in a normal position), and FIG. Waveform showing output state output from each node point in the diagram (when color burst signal is included in abnormal position).

Claims (2)

페데스탈과 칼라 버어스트신호를 포함하는 영상신호가 일정레벨을 유지하도록 영상신호를 클램핑하는 클램프 회로와; 상기 영상신호에서 동기신호를 분리하여 이를 반전 증폭하는 동기신호 분리부; 상기 동기신호 분리부에서 출력되는 수평동기신호(Hsync)와 1/N분주기에서 궤환되는 기준신호(Href)에 의해 클럭펄스(CLK)를 발진하는 PLL 및 클럭 발진부; 상기 PLL 및 클럭 발진부에서 출력되는 클럭펄스를 인가받아 1/N분주하는 1/N분주기; 상기 PLL 및 클럭 발진부에서 발진하는 클럭펄스를 인가받아 버어스트 플래그 펄스를 발진하는 버어스트 플래그 펄스 발진부; 상기 버어스트 플래그 펄스 발진부에서 발생되는 버어스트 플래그 펄스에 의해 스위칭 동작하여 클램프 회로에서 출력되는 영상신호 중 칼라 버어스트신호만을 통과시켜 증폭부에 인가 하는 스위칭 소자; 상기 스위칭 소자를 경유한 칼라 버어스트신호를 증폭하는 증폭부; 상기 증폭된 칼라 버어스트신호를 디지탈 신호로 변환하는 아날로그/디지탈 변환부; 상기 버어스트 플래그 펄스가 라이징되어진 후 아날로그/디지탈 변환부에서 출력되는 칼라 버어스트신호의 입력상태를 판정하고 이를 알리기 위한 판정신호를 출력하는 데이타 분석부; 상기 동기신호 분리부의 수평동기신호(H.sync)를 반전하는 반전기에서 인가되는 수평동기신호(H.sync)의 라이징 에지에서 상기 데이타 분석부의 판정신호가 인가되기까지 카운팅하여 칼라버어스트신호의 위치를 판독하고 이에 해당하는 카운팅값을 후단으로 출력하는 버어스트 위치 판별부를 포함하여 구성되어짐을 특징으로 하는 칼라 버어스트신호 위치 판별장치.A clamp circuit for clamping the video signal such that the video signal including the pedestal and the color burst signal maintains a constant level; A sync signal separator for separating and inverting the sync signal from the video signal; A PLL and a clock oscillator for oscillating a clock pulse CLK by a horizontal sync signal Hsync output from the sync signal separator and a reference signal Href fed back from a 1 / N divider; A 1 / N divider for dividing 1 / N by receiving a clock pulse output from the PLL and the clock oscillator; A burst flag pulse oscillator for generating a burst flag pulse by receiving a clock pulse oscillated by the PLL and the clock oscillator; A switching element configured to switch by a burst flag pulse generated by the burst flag pulse oscillator and to pass only a color burst signal of an image signal output from a clamp circuit to be applied to the amplifier; An amplifier for amplifying the color burst signal via the switching element; An analog / digital converter converting the amplified color burst signal into a digital signal; A data analyzer for determining an input state of a color burst signal output from an analog / digital converter after the burst flag pulse is raised and outputting a determination signal for informing the same; Counting the color burst signal by counting until the determination signal of the data analyzer is applied at the rising edge of the horizontal synchronization signal H.sync applied by the inverter inverting the horizontal synchronization signal H.sync of the synchronization signal separation unit. And a burst position discriminating unit for reading a position and outputting a count value corresponding to the rear end. 제1항에 있어서, 상기 데이타 분석부는 버어스트 플래그 펄스의 라이징 에지에서 칼라 버어스트신호의 입력여부에 의해 칼라 버어스트 신호의 위치가 정상인가를 판정하고 이를 표시하는 하이 혹은 로우 레벨의 판정신호를 버어스트 위치 판별부에 인가하도록 이루어짐을 특징으로 하는 칼라 버어스트신호 위치 판별장치.The high and low level determination signal of claim 1, wherein the data analyzer determines whether or not the position of the color burst signal is normal by inputting the color burst signal at the rising edge of the burst flag pulse. Color burst signal position determining device, characterized in that applied to the burst position determining unit. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019960018591A 1996-05-29 1996-05-29 Color burst signal position distinction apparatus KR100190959B1 (en)

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Application Number Priority Date Filing Date Title
KR1019960018591A KR100190959B1 (en) 1996-05-29 1996-05-29 Color burst signal position distinction apparatus

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Application Number Priority Date Filing Date Title
KR1019960018591A KR100190959B1 (en) 1996-05-29 1996-05-29 Color burst signal position distinction apparatus

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KR970078675A true KR970078675A (en) 1997-12-12
KR100190959B1 KR100190959B1 (en) 1999-06-15

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