KR930015840A - TV and VCC Character Synthesis Circuit - Google Patents

TV and VCC Character Synthesis Circuit Download PDF

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Publication number
KR930015840A
KR930015840A KR1019910022584A KR910022584A KR930015840A KR 930015840 A KR930015840 A KR 930015840A KR 1019910022584 A KR1019910022584 A KR 1019910022584A KR 910022584 A KR910022584 A KR 910022584A KR 930015840 A KR930015840 A KR 930015840A
Authority
KR
South Korea
Prior art keywords
signal
color
cvbs
signals
character
Prior art date
Application number
KR1019910022584A
Other languages
Korean (ko)
Inventor
박중석
Original Assignee
이헌조
주식회사 금성사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 이헌조, 주식회사 금성사 filed Critical 이헌조
Priority to KR1019910022584A priority Critical patent/KR930015840A/en
Publication of KR930015840A publication Critical patent/KR930015840A/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/08—Details of the phase-locked loop
    • 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
    • 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
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/44—Colour synchronisation
    • H04N9/475—Colour synchronisation for mutually locking different synchronisation sources
    • 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
    • H04N9/641—Multi-purpose receivers, e.g. for auxiliary information
    • 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
    • H04N9/67—Circuits for processing colour signals for matrixing

Landscapes

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

Abstract

본 발명은 입력 CVBS 신호와 문자 신호를 합성하여 비데오 신호로 출력시키는 티브이 또는 브이씨알에 관한 것으로, 이와 관련하여 일반적으로 사용되고 있는 종래의 회로는 입력된 CVBS 신호를 휘도 및 칼라 분리부, 칼라 복조부, R.G.B 매트릭스부를 거치면서 R',G',B'로 바꾼 후 문자 발생기에서 나온 R,G,B와 합성하고, R,G,B 엔코더에서 다시 CV',RS'으로 합성하는 과정에 의해 입력 CVBS 신호의 열화가 발생한다.BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a TV or TV which synthesizes an input CVBS signal and a text signal and outputs the video signal. After changing to R ', G', B 'through RGB matrix part, synthesize with R, G, B from character generator, and synthesize with CV', RS 'again from R, G, B encoder. Degradation of the CVBS signal occurs.

이에 따라 본 발명은 상기와 같은 종래 회로의 결함으로 감안하여 문자 발생기에서 나오는 R,G,B 신호를 비데오 신호의 칼라 버스트에 로킹(Looking)시켜 문자 비데오 신호를 만든후 이를 입력 CVBS와 합성하여 입력 CVBS의 열화가 방지되도록 창안된 것이다.Accordingly, the present invention provides a character video signal by locking the R, G, and B signals from the character generator to the color burst of the video signal in consideration of the deficiencies of the conventional circuit as described above, and then synthesizes them with the input CVBS to input them. It is designed to prevent deterioration of CVBS.

Description

티브이 및 브이씨알의 문자 합성 회로TV and VCC Character Synthesis Circuit

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

제1도는 종래의 문자 합성회로도, 제2도는 티브이 및 브이씨알에서의 문자 합성 회로도.FIG. 1 is a conventional character synthesizing circuit diagram, and FIG. 2 is a character synthesizing circuit diagram in TV and VRC.

Claims (1)

입력 CVBS 신호를 HS,VS 그리고 CSY 신호로 분리하는 수평, 수직 동기 분리부(50)와, 입력 CVBS에서 분리된 HS,VS에 맞추어 문자에 대한 R,G,B 신호와 FB 신호를 발생시키는 문자 발생부(51)와, 상기 문자 발생부(51)로부터 R.G.B 신호를 입력하여 이로 부터 색차신호인 U, V 신호와 휘도 신호를 출력하는 R.G.B 매트릭스부(52)와, 입력 CVBS 신호로 부터 칼라 버스트 신호를 추출하는 칼라 버스트 게이트(58)와, 상기 칼라 버스트 게이트(58)로 부터의 출력에 따라 연속적인 칼라 캐리어를 발생시키는 칼라 캐리어 발생부(59)와, 상기 칼라 캐리어 발생부(59)로 부터 출력되는 CVBS 신호의 버스트와 위상이 같은 칼라 캐리어와 발진부(61)로 부터의 출력신호의 위상을 비교 검출하여 상기 발진부의 출력 위상을 입력 CVBS의 버스트 신호와 동일하게 맞추는 PLL부(60)와, 상기 발진부(61)의 출력신호에 따라 상기 R.G.B 매트릭스부(52)의 U, V 색차신호를 변조하는 U, V 변조부(53,54)와, 상기 U, V 변조부(53,54)의 출력을 서로 합성하는 제1가산부(55)와, 상기 수평, 수직 동기 분리부(50)의 출력신호(CSY)신호에 맞추어 상기 제1가산부(55)의 출력 신호와 휘도 신호를 합성하여 문자 CVBS 신호를 발생하는 제2가산부(56)와, 상기 문자 발생부(51)로 부터의 R.G.B 신호의 발생 유무에 따라 제어되어 선택적으로 CVBS 신호를 출력하는 스위치부(57)로 된 것을 특징으로 하는 티브이 및 브이씨알에서의 문자 발생회로.A horizontal and vertical synchronous separator 50 for separating the input CVBS signal into HS, VS and CSY signals, and a character for generating R, G, B signals and FB signals in accordance with the HS and VS separated from the input CVBS. The generation unit 51, the RGB matrix unit 52 which inputs an RGB signal from the character generation unit 51, and outputs U, V signals and luminance signals which are color difference signals therefrom, and color bursts from the input CVBS signal. A color burst gate 58 for extracting a signal, a color carrier generator 59 for generating continuous color carriers in accordance with an output from the color burst gate 58, and a color carrier generator 59 And the PLL unit 60 which compares and detects the phase of the output signal from the oscillation unit 61 and the color carrier having the same phase as the burst of the CVBS signal outputted from the same. , Of the oscillation unit 61 A U and V modulator 53 and 54 for modulating the U and V color difference signals of the RGB matrix unit 52 according to the output signal, and synthesizing the outputs of the U and V modulator 53 and 54 with each other. A character CVBS signal is generated by synthesizing the output signal and the luminance signal of the first adder 55 according to the first adder 55 and the output signal CSY signal of the horizontal and vertical sync separators 50. And a second adder 56 and a switch 57 for controlling the presence or absence of an RGB signal from the character generator 51 and selectively outputting a CVBS signal. Character generation circuit in. ※ 참고사항 : 최초출원 내용에 의하여 공개되는 것임.※ Note: This is to be disclosed by the original application.
KR1019910022584A 1991-12-10 1991-12-10 TV and VCC Character Synthesis Circuit KR930015840A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019910022584A KR930015840A (en) 1991-12-10 1991-12-10 TV and VCC Character Synthesis Circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019910022584A KR930015840A (en) 1991-12-10 1991-12-10 TV and VCC Character Synthesis Circuit

Publications (1)

Publication Number Publication Date
KR930015840A true KR930015840A (en) 1993-07-24

Family

ID=67356441

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019910022584A KR930015840A (en) 1991-12-10 1991-12-10 TV and VCC Character Synthesis Circuit

Country Status (1)

Country Link
KR (1) KR930015840A (en)

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