KR930007212A - TV's Analog Video Signal Decoding System - Google Patents

TV's Analog Video Signal Decoding System Download PDF

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Publication number
KR930007212A
KR930007212A KR1019910015790A KR910015790A KR930007212A KR 930007212 A KR930007212 A KR 930007212A KR 1019910015790 A KR1019910015790 A KR 1019910015790A KR 910015790 A KR910015790 A KR 910015790A KR 930007212 A KR930007212 A KR 930007212A
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KR
South Korea
Prior art keywords
signal
video signal
analog
digital
unit
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KR1019910015790A
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Korean (ko)
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KR940003036B1 (en
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박용호
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문정환
금성 일렉트론 주식회사
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Priority to KR1019910015790A priority Critical patent/KR940003036B1/en
Publication of KR930007212A publication Critical patent/KR930007212A/en
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Publication of KR940003036B1 publication Critical patent/KR940003036B1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Color Television Systems (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

본 발명은 TV의 아날로그 그 영상신호 디코딩 시스템에 관한 것으로, 일반적인 아날로그 그 수상기는 단순히 안테나로 부터 수신한 TV의 복합영상신호를 아날로그적으로 처리하여 화면에 영상신호를 디스플레이하게 됨으로써 화면에 노이즈가 발생되는 문제점이 있었다.The present invention relates to an analog video signal decoding system of a TV. In general, an analog receiver receives a noise by generating a video signal on a screen by analog processing a TV composite video signal received from an antenna. There was a problem.

이를 보완하기 위한 본 발명은 방송국에서 한 수평주사기간에 영상신호간의 차신호를 코딩하여 전송하면 수신측에서는 상기한 영상 신호를 순차적으로 메모리하여 그 메모리된 이전의 영상신호와 현재 입력되는 영상신호를 아날로그감산부를 통해 감산하고, 다시 그 감산된 영상신호의 차신호값과 차신호로분리부를 통해 분리된 차신호값을 비교하여 적은값을 선택한 후 그 값을 현재 입력되는 영상신호와 가산부에서 가산하여 영상신호에 포함된 노이즈를 제거함으로써, 화면이 선명하게 디스플레이되는 효과가 있는 것이다.In order to compensate for this, the present invention encodes and transmits a difference signal between video signals in a horizontal scanning period in a broadcasting station, and the receiving side sequentially stores the above-described video signals and analogizes the previously stored video signals and the currently input video signals. Subtracts through the subtraction unit, compares the difference signal value of the subtracted video signal with the difference signal value separated by the separation signal, selects a smaller value, and adds the value to the currently input video signal and the adder. By removing the noise included in the video signal, the screen is displayed clearly.

Description

TV의 아날로그 영상신호 디코딩 시스템TV's Analog Video Signal Decoding System

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

제3도는 본 발명의 TV의 아날로그 영상신호 디코딩 시스템 블록도.3 is a block diagram of an analog video signal decoding system of a TV of the present invention.

제4도는 제3도의 TV입력 영상신호 파형도.4 is a waveform diagram of a TV input video signal of FIG.

Claims (1)

튜너(1)를 통해 튜닝된 TV의 복합영상신호를 영상중간주파증폭부(2) 및 영상검파부(3)를 통해 검파하고, 그 검파된 영상신호를 영상증폭부(4)에서 증폭함과 아울러 컬러버스트분리부(5)를 통해 영상신호 및 컬러버스트 신호를 분리한 후 복조부(7)및 영상신호처리부(9)를 통해 신호처리하여 컬러수상관(14)에 디스플레이하는 TV 수상기에 있어서, 상기 영상증폭부(4)에서 입력되는한 수평주사기간 신호간의 영상신호를 디지탈로 변환하는 아날로그/디지탈변환부(16)와, 상기 아날로그/디지탈변환부(16)에서 출력되는 영상신호의 디지탈신호를 순차적으로 저항하는 1H라인메모리부(17)와, 상기 1H라인메모리부(17)에서 출력된 영상신호의 디지탈 신호를 아날로그 신호로 변환하는 디지탈/아날로그변환부(18)와, 상기 디지탈/아날로그변환부(18)로 부터 출력되는 이전의 영상신호와 현재 영상증폭부(4)로 부터 입력되는 영상 신호를 감산하는 아날로그감산부(19)와, 상기영상증폭뷰(4)로 부터 출력되는 영상신호의 차신호를 분리하는 차신호분리부(20)와, 상기 차신호분리부(20)의 출력신호를아날로그신호로 변환하는 디지탈/아날로그변환부(21)와, 상기 디지탈/아날로그변환부(21)로부터 변환된 영상 신호의 차신호와 아날로그감산부(19)로 부터 감산던 된 영상신호의 차신호를 비교하여 적온값을 선택하는 비교선택부(22)와, 상기 비교선택부(22)의 차신호와 영상증폭부(4)로 부터 입력되는 현재 영상신호를 가산하여 컬러버스트분리부(5)로 인가하는 가산부(23)로 구성함을 특징으로 한 TV의 아날로그 영상신호 디코딩 시스템.Detecting the composite video signal of the TV tuned through the tuner (1) through the image intermediate frequency amplifier (2) and the image detector (3), and amplifying the detected video signal by the image amplifier (4); In addition, in the TV receiver which separates the video signal and the color burst signal through the color burst separation unit 5 and then processes the signal through the demodulation unit 7 and the image signal processing unit 9 to display on the color receiver 14 And an analog / digital converter 16 for converting a video signal between horizontal scanning period signals into digital as long as it is input from the image amplifier 4, and the digital signal of the video signal output from the analog / digital converter 16. A 1H line memory unit 17 for sequentially resisting signals, a digital / analog converter 18 for converting a digital signal of an image signal output from the 1H line memory unit 17 into an analog signal, and the digital / Previous output from analog converter 18 Separating the difference signal separating the difference signal of the video signal output from the image amplification unit (4) and the analog subtractor 19 for subtracting the video signal input from the current image amplification unit (4) A difference signal of the video signal converted from the digital signal and the digital / analog converter 21 to convert the output signal of the difference signal separator 20 into an analog signal; And a comparison selecting unit 22 for comparing the difference signal of the video signal subtracted from the analog subtracting unit 19 to select the temperature value, and the difference signal and the image amplifying unit 4 of the comparison selecting unit 22. Analog video signal decoding system of the TV, characterized in that consisting of an adder 23 for adding the current video signal input from the to the color burst separation unit (5). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019910015790A 1991-09-10 1991-09-10 Tv signal decording system KR940003036B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019910015790A KR940003036B1 (en) 1991-09-10 1991-09-10 Tv signal decording system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019910015790A KR940003036B1 (en) 1991-09-10 1991-09-10 Tv signal decording system

Publications (2)

Publication Number Publication Date
KR930007212A true KR930007212A (en) 1993-04-22
KR940003036B1 KR940003036B1 (en) 1994-04-11

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KR1019910015790A KR940003036B1 (en) 1991-09-10 1991-09-10 Tv signal decording system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100299190B1 (en) * 1999-08-23 2001-11-01 윤종용 Circuit of correcting horizontal sync pulse in Television

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100299190B1 (en) * 1999-08-23 2001-11-01 윤종용 Circuit of correcting horizontal sync pulse in Television

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Publication number Publication date
KR940003036B1 (en) 1994-04-11

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