KR890007576A - Video signal generation circuit - Google Patents

Video signal generation circuit Download PDF

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Publication number
KR890007576A
KR890007576A KR870011602A KR870011602A KR890007576A KR 890007576 A KR890007576 A KR 890007576A KR 870011602 A KR870011602 A KR 870011602A KR 870011602 A KR870011602 A KR 870011602A KR 890007576 A KR890007576 A KR 890007576A
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KR
South Korea
Prior art keywords
digital data
color
pip
generating
circuit
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Application number
KR870011602A
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Korean (ko)
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KR900003776B1 (en
Inventor
최훈순
Original Assignee
안시환
삼성전자 주식회사
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Priority to KR1019870011602A priority Critical patent/KR900003776B1/en
Publication of KR890007576A publication Critical patent/KR890007576A/en
Application granted granted Critical
Publication of KR900003776B1 publication Critical patent/KR900003776B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/445—Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information
    • H04N5/45—Picture in picture, e.g. displaying simultaneously another television channel in a region of the screen
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/265—Mixing

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

Abstract

내용 없음No content

Description

피.아이.피용 영상신호 발생회로Video signal generation circuit

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제 2 도는 본 발명의 회로도.2 is a circuit diagram of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

10 : 메모리 20 : 콘트롤러10: memory 20: controller

30, 40, 50 : D-A변환기 200 : 데이터 분리회로30, 40, 50: D-A converter 200: data separation circuit

210 : 디지탈 변조회로 211, 212 : 래치회로210: digital modulation circuit 211, 212: latch circuit

213, 214 : 반전회로 215 : 변조제어회로213, 214: inversion circuit 215: modulation control circuit

216, 218 : 멀티플렉서 217 : 기준레벨데이터 발생회로216, 218: multiplexer 217: reference level data generating circuit

Claims (2)

PIP용 영상신호 합성회로에 있어서, PIP용 화소데이터를 저장하는 메모리(10)와, 상기 PIP용 화소데이터에 Y디지탈 데이터와 B-Y디지탈 데이터 R-Y디지탈 데이터를 분리 데이터 분리회로(200)와, PIP제어신호를 발생하는 콘트롤러(20)와, 색부반송파와 4배의 색부반송파를 발생하는 Y-C크리스탈발진기(620)와, 상기 R-Y디지탈 데이터와 B-Y디지탈 데이터 색디지탈 및 상기 PIP제어신호, 색부반송파, 4배 색부반송파를 입력하여 상기 색부반송파와 4배 색부반송파에 의해 상기 B-Y디지탈 데이터와 상기 R-Y디지탈 데이터를 색디지탈 데이터로 변조한후 상기 PIP데이터를 발생하는 제어신호에 따라 출력하는 디지탈변조회로(210)와, 상기 Y디지탈 데이터에 응답하여 아날로그 Y신호를 발생하는 제1 D-A변환기(30)와, 상기 색디지탈 데이터에 응답하여 아날로그 색신호를 발생하는 제2D-A변환기(40)와, 상기 아날로그 Y신호와 아날로그 색신호에 응답하여 PIP용 영상신호를 발생하는 혼합회로(610)로 구성됨을 특징으로 하는 회로.A PIP video signal synthesizing circuit, comprising: a memory (10) for storing PIP pixel data, a separate data separation circuit (200) for separating Y digital data and BY digital data RY digital data into the PIP pixel data, and PIP control A controller 20 for generating a signal, a YC crystal oscillator 620 for generating a color carrier and four times the color carrier, the RY digital data and the BY digital data, the color digital and the PIP control signal, the color part carrier, 4 times A digital modulation circuit 210 for inputting a color subcarrier to modulate the BY digital data and the RY digital data into color digital data by the color subcarrier and the quadruple color subcarrier, and output the modulated BY digital data according to a control signal for generating the PIP data. And a first DA converter 30 generating an analog Y signal in response to the Y digital data, and generating an analog color signal in response to the color digital data. The 2D-A converter 40 and, in response to the analog signal Y and the analog color signal circuit, characterized by consisting of a mixing circuit 610 for generating a video signal for the PIP. 제 1 항에 있어서, 디지탈변조회로(210)가 상기 PIP제어신호와 상기 B-Y디지탈 데이터를 입력하여 상기 PIP제어신호에 의해 상기 B-Y디지탈 데이터를 전송하는 제1래치회로(211)와, 상기 PIP제어신호와 상기 R-Y디지탈 데이터를 입력하여 상기 PIP제어신호에 의해 상기 R-Y디지탈 데이터를 전송하는 제2래치회로(212)와, 상기 전송되는 B-Y디지탈 데이터에 응답하여 B-Y보수 디지탈 데이터를 발생하는 제1반전회로(213)와, 상기 전송되는 R-Y디지탈 데이터에 응답하여 R-Y보수 디지탈 데이터를 발생하는 제2반전회로(214)와, 색부반송파와 주파수 채배된 색부반송파에 대응하여 제1,2변조 제어신호를 발생하는 변환제어회로(2l5)와, 상기 R-Y디시탈 데이터와 R-Y보수 디지탈 데이터, B-Y디지탈 데이터, B-Y보수 디지탈 데이터를 제1-4입력포트로 입력하는 동시에 상기 제1,2변조 제어신호를 제1,2제어단자로 입력하여 상기 변조 제어신호에 의해 상기 4개의 디지탈 데이터를 변조하므로서 색디지탈 데이터를 발생하는 멀티플렉서(216)와, 일정한 기준레벨데이터를 발생하는 기준레벨데이터 발생회로(217)와, 상기 기준레벨데이터와 색디지탈 데이터를 제1,2입력포트로 입력하은 동시에 PIP를 제어단자로 입력하여 상기 PIP제어신호에 의해 재생모드시 색지탈데이터를 출력하는 멀티플렉서(218)로 구성함을 특징으로 하는 PIP영상신호 합성회로.The first latch circuit 211 of claim 1, wherein the digital modulation circuit 210 inputs the PIP control signal and the BY digital data to transmit the BY digital data by the PIP control signal, and the PIP control. A second latch circuit 212 for inputting a signal and the RY digital data to transmit the RY digital data according to the PIP control signal, and a first inversion for generating BY maintenance digital data in response to the transmitted BY digital data; A second inversion circuit 214 for generating RY complementary digital data in response to the transmitted RY digital data, and a first and second modulation control signal in response to the color carrier and the frequency-carried color carrier. The conversion control circuit 205 and the RY digital data, RY complement digital data, BY digital data, and BY digital data to be input to the first to fourth input ports, and the first and second modulators. A multiplexer 216 for generating color digital data by inputting the signal to the first and second control terminals and modulating the four digital data according to the modulation control signal, and a reference level data generating circuit for generating constant reference level data. 217, a multiplexer 218 for inputting the reference level data and the color digital data to the first and second input ports and simultaneously inputting the PIP to the control terminal and outputting the color digital data in the reproduction mode by the PIP control signal. PIP video signal synthesis circuit, characterized in that consisting of. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019870011602A 1987-10-20 1987-10-20 Video signal generating circuit for pip television KR900003776B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019870011602A KR900003776B1 (en) 1987-10-20 1987-10-20 Video signal generating circuit for pip television

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019870011602A KR900003776B1 (en) 1987-10-20 1987-10-20 Video signal generating circuit for pip television

Publications (2)

Publication Number Publication Date
KR890007576A true KR890007576A (en) 1989-06-20
KR900003776B1 KR900003776B1 (en) 1990-05-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019870011602A KR900003776B1 (en) 1987-10-20 1987-10-20 Video signal generating circuit for pip television

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Publication number Publication date
KR900003776B1 (en) 1990-05-31

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