KR930015902A - Character Generation Circuit of SECAM Type Image Processing Equipment - Google Patents

Character Generation Circuit of SECAM Type Image Processing Equipment Download PDF

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Publication number
KR930015902A
KR930015902A KR1019910023780A KR910023780A KR930015902A KR 930015902 A KR930015902 A KR 930015902A KR 1019910023780 A KR1019910023780 A KR 1019910023780A KR 910023780 A KR910023780 A KR 910023780A KR 930015902 A KR930015902 A KR 930015902A
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KR
South Korea
Prior art keywords
character
signal
output circuit
circuit
output
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KR1019910023780A
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Korean (ko)
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KR960007647B1 (en
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박재혁
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배순훈
대우전자 주식회사
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Priority to KR1019910023780A priority Critical patent/KR960007647B1/en
Publication of KR930015902A publication Critical patent/KR930015902A/en
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Publication of KR960007647B1 publication Critical patent/KR960007647B1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N11/00Colour television systems
    • H04N11/06Transmission systems characterised by the manner in which the individual colour picture signal components are combined
    • H04N11/18Transmission systems characterised by the manner in which the individual colour picture signal components are combined using simultaneous and sequential signals, e.g. SECAM-system
    • 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
    • H04N5/445Receiver circuitry for the reception of television signals according to analogue transmission standards for displaying additional information

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

Abstract

본 발명 SECAM 방식의 영상처리장치에 관한 것으로서, 수평동기신호를 이용하여 음극선관상에 주사되고 있는 색부반송파의 주파수 대역을 스위칭신호출력회로(10)가 검출하여 주사되고 있는 라인에 해당하는 흰색주파수를 흰색주파수출력회로(20)가 출력한다.The present invention relates to a SECAM image processing apparatus, wherein the switching signal output circuit (10) detects a frequency band of a color subcarrier being scanned on a cathode ray tube using a horizontal synchronizing signal to determine a white frequency corresponding to a line being scanned. The white frequency output circuit 20 outputs.

이때, 문자발생회로(30)는 흰색주파수출력회로(20)의 흰색주파수로서 문자신호를 음극선관에 주사하게함으로서 색채의 왜곡이 없이 문자가 음극선관상에 디스플레이되도록한 것임.At this time, the character generation circuit 30 is to scan the character signal as a white frequency of the white frequency output circuit 20 to the cathode ray tube so that the character is displayed on the cathode ray tube without color distortion.

Description

SECAM 방식 영상처리장치의 문자발생회로Character Generation Circuit of SECAM Type Image Processing Equipment

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

제1도는 본 발명에 따른 SECAM 방식 영상처리장치의 문자발생 회로 블럭도, 제2도는 본 발명에 따른 SECAM방식 영상처리장치의 문자발생 회로의 주요부분 파형도.1 is a block diagram of a character generation circuit of a SECAM image processing apparatus according to the present invention, and FIG. 2 is a waveform diagram of a main part of a character generation circuit of a SECAM image processing apparatus according to the present invention.

Claims (4)

SECAM방식의 영상처리장치에 있어서, 입력되는 복합영상신호(CS)가 주시되는 라인에 따른 스위칭 신호를 출력하는 스위칭신호출력회로(10)와, 상기 스위칭신호출력회로(10)에 연결되며 스위칭신호출력회로(10)의 스위칭신호에 따라 스위칭되어 주사되고 있는 라인의 흰색주파수를 출력하는 흰색주파수출력회로(20)와, 소정의 문자신호를 발생시켜 상기 흰색주파수 출력회로의 흰색주파수로 음극선관의 소정구간에 인가하는 문자발생회로(30), 로 구성되는 SECAM 방식영상처리장치의 문자발생회로.In the SECAM type image processing apparatus, a switching signal output circuit (10) for outputting a switching signal according to a line on which an input composite image signal (CS) is viewed, and a switching signal connected to the switching signal output circuit (10). A white frequency output circuit 20 for outputting a white frequency of a line being switched and scanned according to a switching signal of the output circuit 10, and generating a predetermined character signal to generate a white line of the cathode ray tube at the white frequency of the white frequency output circuit. A character generating circuit of a SECAM type image processing apparatus, comprising: a character generating circuit (30) applied to a predetermined section. 제1항에 있어서, 상기 스위칭신호출력회로(10)는 복합영상신호(CS)로부터 수평동기신호를 분리하는 분리부(11)와, 상기 분리부(11)에 연결되어, 분리된 수평동기신호를 소정시간 지연시켜 출력하는 지연부(12)와, 상기 지연부(12)에 연결되며, 지연된 수평동기신호를 이용하여 색부반송파 구간을 검출하는 검출부(13)와, 상기 검출부(13)에 연결되며, 검출부(13)의 출력을 필터링하는 저역통과 필터부(14)와, 상기 저역통과 필터부(14)에 연결되며 저역통과 필터부의 출력을 기준전압과 비교하는 비교부(15), 로 구성되는 것을 특징으로 하는 SECAM 방식 영상처리 장치의 문자 발생회로.The switching signal output circuit 10 of claim 1, wherein the switching signal output circuit 10 is connected to the separation unit 11 and separates the horizontal synchronization signal from the composite video signal CS. A delay unit 12 for outputting a delayed time by a predetermined time, a delay unit 12 connected to the delay unit 12, a detection unit 13 for detecting a color carrier region using a delayed horizontal synchronization signal, and a connection to the detection unit 13 And a low pass filter 14 for filtering the output of the detector 13 and a comparator 15 connected to the low pass filter 14 and comparing the output of the low pass filter with a reference voltage. Character generation circuit of SECAM type image processing apparatus, characterized in that. 제1항에 있어서, 상기 흰색주파수 출력회로(20)는 4.25MHz의 흰색주파수를 발진하는 제1발진부(21)와, 4.4MHz의 흰색주파수를 발진하는 제2발진부(22)와, 상기 스위칭신호출력회로(10), 제1, 제2발진부(21),(22)사이에 연결되며, 상기 스위칭신호출력회로의 출력에 따라 스위칭되어 상기 제1, 2발진부(21),(22)의 출력을 선택적으로 문자발생회로에 인가하는 제1스위치(23), 로 구성되는 것을 특징으로 하는 SECAM방식 영상처리장치의 문자 발생회로.2. The white frequency output circuit 20 further comprises: a first oscillator 21 oscillating a white frequency of 4.25 MHz, a second oscillator 22 oscillating a white frequency of 4.4 MHz, and the switching signal. It is connected between the output circuit 10, the first and second oscillator 21, 22, and is switched in accordance with the output of the switching signal output circuit to output the first, second oscillator 21, 22 A first switch (23) for selectively applying to the character generating circuit, characterized in that consisting of the character generation circuit of the SECAM type image processing apparatus. 제1항에 있어서, 상기 문자발생회로(30)는 사용자의 제어에 따른 문자신호 및 문자신호가 음극선관상 디스플레이될 위치를 지정하는 위치신호를 출력하는 문자발생부(31)와, 상기 흰색주파수출력회로(20), 및 문자발생부(31)사이에 연결되며, 상기 문자발생부(31)의 문자신호를 상기 흰색주파수출력회로(20)의 출력주파수로 출력하는 문자 주파수설정부(32)와, 상기 문자발생부(31)및 문자주파수 설정부(32)사이에 연결되며, 상기 문자발생부(31)의 위치신호에 따라 스위칭되어, 입력되는 복합영상신호(CS)또는 문자주파수설정부(32)의 문자신호를 선택적으로 음극선관에 인가하는 제2스위치(33), 로 구성되는 SECAM 방식 영상처리장치의 문자발생회로.The character generating circuit (30) according to claim 1, wherein the character generating circuit (30) outputs a text signal (31) for outputting a text signal according to a user's control and a position signal for designating a position where the text signal is to be displayed on a cathode ray tube, and the white frequency output. It is connected between the circuit 20 and the character generator 31, and the character frequency setting unit 32 for outputting the character signal of the character generator 31 at the output frequency of the white frequency output circuit 20 and Is connected between the character generator 31 and the character frequency setter 32, and is switched according to the position signal of the character generator 31 and inputs the composite image signal CS or the character frequency setter ( 32. A character generation circuit of a SECAM image processing apparatus, comprising: a second switch (33) for selectively applying a character signal of (32) to a cathode ray tube. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019910023780A 1991-12-21 1991-12-21 Character generation circuit for secam image processing apparatus KR960007647B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019910023780A KR960007647B1 (en) 1991-12-21 1991-12-21 Character generation circuit for secam image processing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019910023780A KR960007647B1 (en) 1991-12-21 1991-12-21 Character generation circuit for secam image processing apparatus

Publications (2)

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KR930015902A true KR930015902A (en) 1993-07-24
KR960007647B1 KR960007647B1 (en) 1996-06-07

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KR1019910023780A KR960007647B1 (en) 1991-12-21 1991-12-21 Character generation circuit for secam image processing apparatus

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