KR960005572A - Noise Reduction Circuit of Video Playback Equipment - Google Patents

Noise Reduction Circuit of Video Playback Equipment Download PDF

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Publication number
KR960005572A
KR960005572A KR1019940015815A KR19940015815A KR960005572A KR 960005572 A KR960005572 A KR 960005572A KR 1019940015815 A KR1019940015815 A KR 1019940015815A KR 19940015815 A KR19940015815 A KR 19940015815A KR 960005572 A KR960005572 A KR 960005572A
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KR
South Korea
Prior art keywords
correlation detection
correlation
detection output
noise reduction
reduction circuit
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Application number
KR1019940015815A
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Korean (ko)
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KR970010641B1 (en
Inventor
정성갑
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이헌조
엘지전자 주식회사
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Priority to KR1019940015815A priority Critical patent/KR970010641B1/en
Publication of KR960005572A publication Critical patent/KR960005572A/en
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Publication of KR970010641B1 publication Critical patent/KR970010641B1/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
    • G11B20/24—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing noise

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)

Abstract

본 발명은 도트간의 상관정도에 따라 그에 맞은 FIR(Finite Impulsc Response)필터가 선택되도록 한 영상재생장치의 노이즈 감쇄회로에 관한 것이다.The present invention relates to a noise reduction circuit of an image reproducing apparatus in which a FIR (Finite Impulsc Response) filter is selected according to the degree of correlation between dots.

종래의 경우는 상관검출감도를 일정케 함으로써 윤곽부분이나 낮은 레벨의 영상신호에서는 화질의 일화를 초래하던 점을 감안하여 본 발명은 복합영상신호를 입력으로 받아 1수정라인신호내에서의 상관을 검출하고 검출된 상관상태에 따라서 상관검출감도제어부의 상관판단기준치를 변화시켜 적응적(Adaptive)으로 FIR필터의 계수를 절환함으로써 영상신호의 윤곽부의 화질열화없이 노이즈 감쇄할 수 있도록 한 것이다.In the conventional case, the correlation detection sensitivity is made constant so that the image quality is anecdotal in the contour portion or the low level image signal. The correlation determination reference value of the correlation detection sensitivity control unit is changed according to the detected correlation state to adaptively switch coefficients of the FIR filter to reduce noise without deterioration of image quality of the contour portion of the image signal.

Description

영상재생장치의 노이즈 감쇄회로Noise Reduction Circuit of Video Playback Equipment

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

제2도는 본 발명의 구성도.2 is a block diagram of the present invention.

Claims (2)

디지탈 입력영상신호를 4샘플씩 지연시키는 복수개의 딜레이와, 상기 입력영상신호 및 복수개의 딜레이의 각각의 출력 샘플을 이용하여 샘플간의 상관을 검출하여 제1 및 제2상관검출출력신호로 출력하는 상관검출부와, 마이컴으로부터의 상관검출감도제어신호 및 상기 상관검출부의 제1상관검출출력신호에 따라 상기 상관검출부의 상관검출을 제어하는 상관판단기준치를 출력하는 상관검출감도제어부와, 서로 대역폭이 다른 복수개의 FIR 필터와, 상기 상관검출부의 제1 및 제2상관검출출력신호에 의해 상기 복수개의 FIR 필터 출력중의 하나를 선택하는 멀티플렉서로 구성됨을 특징으로 하는 영상재생장치의 노이즈 감쇄회로.A plurality of delays for delaying the digital input video signal by four samples, and a correlation between the samples using the respective output samples of the input video signal and the plurality of delays to detect and output the first and second correlation detection output signals. A detection unit, a correlation detection sensitivity control unit for outputting a correlation determination reference value for controlling correlation detection of the correlation detection unit according to the correlation detection sensitivity control signal from the microcomputer and the first correlation detection output signal of the correlation detection unit, and a plurality of bandwidths having different bandwidths from each other; And a multiplexer for selecting one of the plurality of FIR filter outputs according to the first FIR filter and the first and second correlation detection output signals of the correlation detection unit. 제1항에 있어서, 상기 제2상관검출출력신호는 맨좌우측의 샘플 및 가장 가운데 샘플간의 상관검출출력이며, 제1상관검출출력신호는 맨좌우측의 샘플을 제외한 나머지 샘플간의 상관검출출력임을 특징으로 하는 영상재생장치의 노이즈 감쇄회로.The method of claim 1, wherein the second correlation detection output signal is a correlation detection output between a sample on the left and right side and a center sample, and the first correlation detection output signal is a correlation detection output between the remaining samples except for the sample on the left and right sides. Noise reduction circuit of a video reproducing apparatus. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940015815A 1994-07-01 1994-07-01 Noise attenuation circuit of video reconstruction apparatus KR970010641B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940015815A KR970010641B1 (en) 1994-07-01 1994-07-01 Noise attenuation circuit of video reconstruction apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940015815A KR970010641B1 (en) 1994-07-01 1994-07-01 Noise attenuation circuit of video reconstruction apparatus

Publications (2)

Publication Number Publication Date
KR960005572A true KR960005572A (en) 1996-02-23
KR970010641B1 KR970010641B1 (en) 1997-06-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019940015815A KR970010641B1 (en) 1994-07-01 1994-07-01 Noise attenuation circuit of video reconstruction apparatus

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KR (1) KR970010641B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100522607B1 (en) * 2003-07-15 2005-10-19 삼성전자주식회사 Apparatus and method for executing adaptive video signal processing according to noise condition

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100522607B1 (en) * 2003-07-15 2005-10-19 삼성전자주식회사 Apparatus and method for executing adaptive video signal processing according to noise condition

Also Published As

Publication number Publication date
KR970010641B1 (en) 1997-06-28

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