KR900008879A - Automatic Image Quality Compensation Circuit and Method of Color Television Receiver - Google Patents

Automatic Image Quality Compensation Circuit and Method of Color Television Receiver Download PDF

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Publication number
KR900008879A
KR900008879A KR1019880014663A KR880014663A KR900008879A KR 900008879 A KR900008879 A KR 900008879A KR 1019880014663 A KR1019880014663 A KR 1019880014663A KR 880014663 A KR880014663 A KR 880014663A KR 900008879 A KR900008879 A KR 900008879A
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South Korea
Prior art keywords
signal
output
color television
image quality
intermediate frequency
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Application number
KR1019880014663A
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Korean (ko)
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KR910005505B1 (en
Inventor
송동일
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안시환
삼성전자 주식회사
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Priority to KR1019880014663A priority Critical patent/KR910005505B1/en
Publication of KR900008879A publication Critical patent/KR900008879A/en
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Publication of KR910005505B1 publication Critical patent/KR910005505B1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/44Colour synchronisation
    • H04N9/455Generation of colour burst signals; Insertion of colour burst signals in colour picture signals or separation of colour burst signals from colour picture signals

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

Abstract

내용 없음.No content.

Description

칼라텔리비젼 수상기의 자동 화질 보상회로 및 방식Automatic Image Quality Compensation Circuit and Method of Color Television Receiver

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

제1도는 본 발명에 따른 블록도.1 is a block diagram according to the present invention.

제2도는 본 발명에 따른 제1도의 구체회로도.2 is a detailed circuit diagram of FIG. 1 according to the present invention.

Claims (3)

튜너부(1)는 안테나(100)로부터 입력되는 RF신호를 증폭하는 RF증폭기(11), RF증폭기(11)의 출력과 중간주파수(IF)로 추출하기 위해 소정 발진하는 국부발진기(19)와, 상기 국부발전기(19)의 출력과 믹서(12)의 출력을 믹싱하여 차에 의해 중간주파수를 발생하는 믹서(12)와, 상기 믹서(12)로부터 출력된 중간주파수를 필터링하는 IF필터(13)를 구비하는 칼라 텔레비젼 수상기 화질 보상회로에 있어서, 상기 튜너부(1)의 IF 필터(13)를 통해 필터링 중간주파수를 증폭하는 프리앰프(14)와, 상기 프리엠프(14)의 출력신호를 소정의 대역통과 특성을 필터링하는 표면음향파(SAW)필터(15)와, 상기 표면음향파(SAW) 필터(15)의 출력 중간주파수를 증폭하여 검파하는 VIF증폭 및 검파회로(16)와, 상기 VIF증폭 및 검파회로(16)에서 출력되는 합성 영상신호를 고역 필터링하는 고역통과 필터(18)와, 상기 복합영상신호를 받은 시스템에서 발생되는 버어스트 케이트 신호단(300)의 입력신호와 디 피이트단(400)으로 입력되는 무신호 및 채널 전환시 발생되는 신호에 의해 버어스트 신호의 진폭을 검출하여 상기 프리앰프(14)의 중간주파수를 동조특성을 가변하는 버어스트 신호 진폭검출회로(17)로 구성됨을 특징으로 하는 회로.The tuner 1 includes an RF amplifier 11 for amplifying an RF signal input from the antenna 100, a local oscillator 19 for oscillating a predetermined oscillation to extract the output of the RF amplifier 11 and the intermediate frequency IF. Mixing the output of the local generator 19 and the output of the mixer 12, the mixer 12 for generating an intermediate frequency by the difference, and the IF filter 13 for filtering the intermediate frequency output from the mixer 12 A color television receiver image quality compensation circuit comprising: a preamplifier (14) for amplifying a filtering intermediate frequency through an IF filter (13) of the tuner unit (1), and an output signal of the preamplifier (14). A surface acoustic wave (SAW) filter 15 for filtering predetermined band pass characteristics, a VIF amplification and detection circuit 16 for amplifying and detecting an output intermediate frequency of the surface acoustic wave (SAW) filter 15, A high pass filter for high pass filtering the composite video signal output from the VIF amplification and detection circuit 16. 18 and a burst signal by an input signal of a burst gate signal stage 300 generated by a system receiving the composite video signal and a signal generated when a channel is switched and a non-signal input to the discrete stage 400. And a burst signal amplitude detection circuit (17) for detecting the amplitude of the preamplifier (14) and varying the intermediate frequency of the preamplifier (14). 제1항에 있어서, 버어스트 신호 진폭 검출회로(17)가 상기 고역통과 필터회로(18)의 출력에서 버어스트 신호를 검출하는 제1수단과, 상기 칼라 텔레비젼 시스템으로부터 발생되는 버어스트 게이트 신호에의해 제어하는 제2수단과 상기 칼라 텔레비젼 시스템으로부터 발생되는 무신호나 채널 변화기에 따라 상기 제1수단의 출력을 제어하는 제3수단과, 상기 제2, 3수단의 출력에 따라 상기 제1수단의 검출출력을 DC화하여 상기 DC화된 전압에 의해 바렉터 다이오드 역전압 제어로 상기 프리앰프(14)의 동조수단의 중심주파수를 가변하는 제4수단으로 구성됨을 특징으로하는 칼라 텔레비젼 수상기의 자동 화질 보상회로.2. The first and second means for detecting a burst signal at the output of said high pass filter circuit (18), and a burst gate signal generated from said color television system. Second means for controlling the third means for controlling the output of the first means according to no signal or channel changer generated from the color television system, and the first means for controlling the output of the first means. And a fourth means for converting the detection output into DC and varying the center frequency of the tuning means of the preamplifier 14 by controlling the diode reverse voltage control by the DC voltage. Circuit. 칼라 텔레비젼 수상기의 화질 보상방식에 있어서, 상기 칼라 텔레비젼 수상기 복합영상신호에서 버어스트신호의 진폭을 검출하여 복합 영상신호의 칼라 버어스트 신호의 진폭의 크기에 비례하는 DC 제어 전합을 얻고,이 전압으로 IF증폭신호의 동조 특성을 변화시켜 복합영상신호의 고역성분의 증폭도를 자동으로 조정하여 화질을보상하는 칼라텔레비젼 수상기의 자동 화질 보상방식.In the image quality compensation method of a color television receiver, the amplitude of the burst signal is detected from the composite video signal of the color television receiver, and a DC control sum proportional to the magnitude of the amplitude of the color burst signal of the composite video signal is obtained. Automatic image quality compensation method of color television receiver which compensates the image quality by changing the tuning characteristics of IF amplified signal and automatically adjusting the amplification degree of high frequency component of composite video signal. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019880014663A 1988-11-08 1988-11-08 Automatic picture image definition compensation circuit and method of color tv KR910005505B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019880014663A KR910005505B1 (en) 1988-11-08 1988-11-08 Automatic picture image definition compensation circuit and method of color tv

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019880014663A KR910005505B1 (en) 1988-11-08 1988-11-08 Automatic picture image definition compensation circuit and method of color tv

Publications (2)

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KR900008879A true KR900008879A (en) 1990-06-04
KR910005505B1 KR910005505B1 (en) 1991-07-31

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KR1019880014663A KR910005505B1 (en) 1988-11-08 1988-11-08 Automatic picture image definition compensation circuit and method of color tv

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100404395B1 (en) * 2001-09-24 2003-11-03 엘지이노텍 주식회사 Tuner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100404395B1 (en) * 2001-09-24 2003-11-03 엘지이노텍 주식회사 Tuner

Also Published As

Publication number Publication date
KR910005505B1 (en) 1991-07-31

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