KR970003091A - Low pass filter on the recording player - Google Patents

Low pass filter on the recording player Download PDF

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Publication number
KR970003091A
KR970003091A KR1019950018083A KR19950018083A KR970003091A KR 970003091 A KR970003091 A KR 970003091A KR 1019950018083 A KR1019950018083 A KR 1019950018083A KR 19950018083 A KR19950018083 A KR 19950018083A KR 970003091 A KR970003091 A KR 970003091A
Authority
KR
South Korea
Prior art keywords
pass filter
low pass
signal
video signal
color
Prior art date
Application number
KR1019950018083A
Other languages
Korean (ko)
Other versions
KR0159411B1 (en
Inventor
김창진
Original Assignee
배순훈
대우전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 배순훈, 대우전자 주식회사 filed Critical 배순훈
Priority to KR1019950018083A priority Critical patent/KR0159411B1/en
Publication of KR970003091A publication Critical patent/KR970003091A/en
Application granted granted Critical
Publication of KR0159411B1 publication Critical patent/KR0159411B1/en

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Classifications

    • 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
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/0115—Frequency selective two-port networks comprising only inductors and capacitors
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/0153—Electrical filters; Controlling thereof

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

Abstract

본 발명은 MESECAM 컬러를 향상하도록 하기에 적합한 녹화 재생기의 저역 통과 필터에 관한 것으로, 종래에는 통상적으로재생 컬러 저역 통과 필터의 정수가 PAL 컬러 재생용으로 정해져 있기 때문에 MESECAM 컬러 신호를 재생하면 대역 특성이나빠져서 재생 화질이 떨어지게 되었으나, 본 발명에서는 종래의 저역 통과 필터(22) 내에 대역 통과 필터(36)를 추가로설정해서 MESECAM 컬러 사용 여부에 따라 그 추가로 설정된 대역 통과 필터가 동작하도록 함으로써 MESECAM 컬러 사용시에도 최적의 영상을 나타낼 수 있으므로 상기 결점을 개선시킬 수 있는 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low pass filter of a recording player suitable for improving MESECAM color. Conventionally, since the constant of the reproduction color low pass filter is defined for PAL color reproduction, the band characteristic is reduced when the MESECAM color signal is reproduced. In the present invention, although the reproduction quality is deteriorated, the band pass filter 36 is additionally set in the conventional low pass filter 22 so that the additional band pass filter operates according to whether or not the MESECAM color is used. Since the optimal image can be displayed, the defect can be improved.

Description

녹화 재생기의 저역 통과 필터Low pass filter on the recording player

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

제5도는 본 발명에 따른 녹화 재생기의 저역 통과 필터의 일 실시예를 나타낸 회로도.5 is a circuit diagram showing an embodiment of a low pass filter of a recording player according to the present invention;

Claims (1)

비디오로부터의 자기적인 영상 신호를 검출하여 전기적인 영상 신호로 변환해서 출력하는 영상 헤드(12)와, 상기 영상 헤드(12)의 영상 신호를 소정의 레벨이 되도록 증폭해서 출력하는 프리 앰프(14)와, 상기 프리 앰프(14)의 영상 신호를 인가받아 휘도 신호를 등화시키는 휘도 신호 등화기(16)와, 상기 프리 앰프(14)의 영상 신호를 인가받아 저역 필터링해서 컬러 신호를 출력하는 저역 통과 필터(22)와, 상기 저역 통과 필터(22)의 컬러 신호와 휘도 신호 등화기(16)의 휘도 신호를 영상 처리해서 해당 영상을 디스플레이 하기 위한 영상 신호를 출력하는 영상 신호 처리부(24)에 있어서, 상기 저역 통과 필터(22)는, 상기 프리 앰프(14)의 영상 신호를 인가받아 대역 필터링해서 출력하는 대역 통과 필터(32)와; 상기 대역 통과 필터(32)의 출력을 저역 필터링해서 출력하는 저역 통과 필터(34)와; 상기 저역 통과 필터(34)의 출력을 대역 필터링해서 출력하는 대역 통과 필터(36)와; 상기 대역 통과 필터(36)와 접지단을 선택적으로 스위칭하여 MESECAM 방식일 때 대역 통과 필터(36)가 동작하도록 하는 스위칭부(38)를 포함하여 이루어지는 녹화 재생기의 저역 통과 필터.A video head 12 which detects a magnetic video signal from the video, converts the video signal into an electrical video signal, and outputs the video signal; and a preamplifier 14 amplifies and outputs the video signal of the video head 12 to a predetermined level. A low pass through which the luminance signal equalizer 16 receives the video signal of the preamplifier 14 and equalizes the luminance signal and the low pass filter receives the image signal of the preamplifier 14 and outputs a color signal. In the image signal processing unit 24 for performing image processing on the filter 22 and the color signal of the low pass filter 22 and the luminance signal of the luminance signal equalizer 16, and outputting a video signal for displaying the corresponding image. The low pass filter (22) includes: a band pass filter (32) for receiving the video signal of the preamplifier (14) and band filtering the same; A low pass filter 34 for low pass filtering the output of the band pass filter 32; A band pass filter 36 for band filtering the output of the low pass filter 34; And a switching unit (38) for selectively switching the band pass filter (36) and the ground terminal to operate the band pass filter (36) in a MESECAM scheme. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950018083A 1995-06-29 1995-06-29 Low pass filter for video recorder reproducer KR0159411B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950018083A KR0159411B1 (en) 1995-06-29 1995-06-29 Low pass filter for video recorder reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950018083A KR0159411B1 (en) 1995-06-29 1995-06-29 Low pass filter for video recorder reproducer

Publications (2)

Publication Number Publication Date
KR970003091A true KR970003091A (en) 1997-01-28
KR0159411B1 KR0159411B1 (en) 1999-01-15

Family

ID=19418714

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950018083A KR0159411B1 (en) 1995-06-29 1995-06-29 Low pass filter for video recorder reproducer

Country Status (1)

Country Link
KR (1) KR0159411B1 (en)

Also Published As

Publication number Publication date
KR0159411B1 (en) 1999-01-15

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