KR940001114A - Noise cancellation circuit - Google Patents

Noise cancellation circuit Download PDF

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Publication number
KR940001114A
KR940001114A KR1019920009514A KR920009514A KR940001114A KR 940001114 A KR940001114 A KR 940001114A KR 1019920009514 A KR1019920009514 A KR 1019920009514A KR 920009514 A KR920009514 A KR 920009514A KR 940001114 A KR940001114 A KR 940001114A
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KR
South Korea
Prior art keywords
signal
output
amplitude
limiter block
input
Prior art date
Application number
KR1019920009514A
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Korean (ko)
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KR100200684B1 (en
Inventor
박호진
Original Assignee
김광호
삼성전자 주식회사
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Priority to KR1019920009514A priority Critical patent/KR100200684B1/en
Publication of KR940001114A publication Critical patent/KR940001114A/en
Application granted granted Critical
Publication of KR100200684B1 publication Critical patent/KR100200684B1/en

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)
  • Processing Of Color Television Signals (AREA)
  • Picture Signal Circuits (AREA)

Abstract

본 발명은 재생된 비디오 신호로부터 잡음을 제거하기 위한 잡음제거회로로서 휘도 및 색신호분리부와 상기 휘도 및 색신호분리부로부터 분리되어 출력되는 휘도신호를 입력하여 그의 고주파성분만을 통과하는 고역필터와 상기 고역필터의 출력을 증폭하고 이 증폭된 신호중 일정크기의 진폭을 제한하여 출력하는 리미터블럭과 상기 리미터블럭의 출력신호를 입력하여 그진폭을 일정레벨로 감소하여 출력하는 감쇄기와 진폭이 조절된 재생된 비디오신호와 상기 감쇄기의 출력을 믹서하여 출력함으로써 재생된 비디오신호에 포함된 잡음을 제거하는 믹서를 포함하여 구성되는 잡음제거회로에 있어서, 상기 리미터블럭은 상기 고역필터의 출력을 증폭하는 증폭부와, 상기 증폭부의 출력을 입력으로 하고 그 입출력특성이 입력신호에 대한 출력신호의 비가 단일극점 단일영점을 가지는 단일극점 단일영점 필터를 포함하여 구성되어 특정주파수의 진폭을 제한하게 되는 것을 특징으로 하며 상기 단일극점 단일영점 필터를 구성함에 있어 외부적으로 조절할 수 있는 가변저항을 이용하도록 함으로써 잡음제거회로의 특성을 보정하는 것이 가능하게 되는 효과가 있다.The present invention is a noise canceling circuit for removing noise from a reproduced video signal, a high pass filter and a high pass passing only a high frequency component by inputting a luminance and color signal separation unit and a luminance signal output from the luminance and color signal separation unit. Amplified and output amplitude-controlled video with a limiter block that amplifies the output of the filter and limits the amplitude of a certain amplitude of the amplified signal, and outputs the output signal of the limiter block by reducing its amplitude to a certain level. A noise canceling circuit comprising a mixer for removing noise included in a reproduced video signal by mixing and outputting a signal and an output of the attenuator, wherein the limiter block comprises: an amplifier for amplifying the output of the high pass filter; The output of the amplifier is input and the input / output characteristics of the output signal with respect to the input signal It is characterized by including a single pole single zero filter having a single pole single zero ratio to limit the amplitude of a specific frequency and to use an externally adjustable variable resistor in the configuration of the single pole single zero filter. This makes it possible to correct the characteristics of the noise canceling circuit.

Description

잡음 제거 회로Noise cancellation circuit

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

제1도는 본 발명의 블록도이고,1 is a block diagram of the present invention,

제2도는 상기 제1도의 리미터블럭(49)의 상세블럭도이고,FIG. 2 is a detailed block diagram of the limiter block 49 of FIG.

제3도는 상기 제1도의 각부 파평도이다.3 is a sectional plan view of each part of FIG.

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

37 : 고역필터 39 : 단일극점 단일영역 필터37: high pass filter 39: single pole single area filter

49 : 리미터 블럭49: limiter block

Claims (3)

재생된 비디오신호로부터 위도신호와 색신호를 분리하는 휘도 및 색신호분리부와; 상기 휘도 및 색신호분리부로부터 분리되어 출력되는 휘도신호를 입력하여 그의 고주파성분만을 통과하는 고역필터와; 상기 고역필터의 출력을 증폭한 후 사용자의 신호에 따라 신호를 그대로 출력하거나 또는 증폭된 신호중 특정주파수대의 신호를 감쇄하여 출력하는 리미터블럭과; 상기 리미터블럭의 출력신호를 입력하여 그진폭을 일정레벨로 감소하여 출력하는 감쇄기와; 진폭이 조절된 재생된 비디오신호와 상기 감쇄기의 출력을 믹서하여 출력함으로써 재생된 비디오신호에 포함된 잡음을 제거하는 믹서를 구비하는 것을 특징으로 하는 잡음 제거 회로.A luminance and color signal separator for separating the latitude signal and the color signal from the reproduced video signal; A high pass filter which inputs a luminance signal separated from the luminance and color signal separation unit and passes only a high frequency component thereof; A limiter block for amplifying the output of the high pass filter and outputting a signal as it is, or attenuating and outputting a signal of a specific frequency band among the amplified signals; An attenuator for inputting an output signal of the limiter block to reduce its amplitude to a predetermined level and output the same; And a mixer which removes noise included in the reproduced video signal by mixing and outputting the reproduced video signal of which the amplitude is adjusted and the output of the attenuator. 상기 제1항에 있어서, 상기 리미터블럭은 상리 리미터블럭는 상기고역필터의 출력을 증폭하는 증폭부와; 상기 증폭부의 출력을 입력으로 하고 그 입출력특성이 입력신호에 대한 출력신호의 비가 단일극점 단알영점을 가지는 단일극점 단일영점 필터를 구비하는 것을 특징으로 하는 잡음 제거 회로.2. The apparatus of claim 1, wherein the limiter block comprises: an amplifying unit configured to amplify an output of the high pass filter; And a single pole single zero filter having an output of the amplification unit as an input and having an input / output characteristic having a ratio of a single pole single zero to an input signal. 상기 제2항에 있어서, 상기 리미터 블럭은 그 입력단자가 상기 단일극점 단일영점 필터의 출력단자에 연결되고 그 출력단자가 상기 감쇄기에 연결되어 신호의 완충작용을 하는 버퍼를 더 구비하는 것을 특징으로 하는 잡음 제거 회로.3. The limiter block of claim 2, wherein the limiter block further comprises a buffer having an input terminal connected to an output terminal of the single pole single zero filter and an output terminal connected to the attenuator to buffer a signal. Noise Canceling Circuit. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920009514A 1992-06-01 1992-06-01 Circuit for removing noise KR100200684B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920009514A KR100200684B1 (en) 1992-06-01 1992-06-01 Circuit for removing noise

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920009514A KR100200684B1 (en) 1992-06-01 1992-06-01 Circuit for removing noise

Publications (2)

Publication Number Publication Date
KR940001114A true KR940001114A (en) 1994-01-10
KR100200684B1 KR100200684B1 (en) 1999-06-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019920009514A KR100200684B1 (en) 1992-06-01 1992-06-01 Circuit for removing noise

Country Status (1)

Country Link
KR (1) KR100200684B1 (en)

Also Published As

Publication number Publication date
KR100200684B1 (en) 1999-06-15

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