KR870010536A - Fm기록 재생계의 노이즈 저감회로 - Google Patents

Fm기록 재생계의 노이즈 저감회로 Download PDF

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Publication number
KR870010536A
KR870010536A KR870003076A KR870003076A KR870010536A KR 870010536 A KR870010536 A KR 870010536A KR 870003076 A KR870003076 A KR 870003076A KR 870003076 A KR870003076 A KR 870003076A KR 870010536 A KR870010536 A KR 870010536A
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KR
South Korea
Prior art keywords
luminance signal
circuit
low
band
noise reduction
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KR870003076A
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English (en)
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KR950013380B1 (ko
Inventor
신지 가네코
Original Assignee
오가 노리오
소니 가부시키가이샤
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Publication of KR870010536A publication Critical patent/KR870010536A/ko
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Publication of KR950013380B1 publication Critical patent/KR950013380B1/ko

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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/92—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N5/923—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback using preemphasis of the signal before modulation and deemphasis of the signal after demodulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/7908—Suppression of interfering signals at the reproducing side, e.g. noise
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/793—Processing of colour television signals in connection with recording for controlling the level of the chrominance signal, e.g. by means of automatic chroma control circuits
    • H04N9/7933—Processing of colour television signals in connection with recording for controlling the level of the chrominance signal, e.g. by means of automatic chroma control circuits the level control being frequency-dependent
    • H04N9/7936—Processing of colour television signals in connection with recording for controlling the level of the chrominance signal, e.g. by means of automatic chroma control circuits the level control being frequency-dependent by using a preemphasis network at the recording side and a deemphasis network at the reproducing side
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/797—Processing of colour television signals in connection with recording for recording the signal in a plurality of channels, the bandwidth of each channel being less than the bandwidth of the signal
    • H04N9/7973—Processing of colour television signals in connection with recording for recording the signal in a plurality of channels, the bandwidth of each channel being less than the bandwidth of the signal by dividing the luminance or colour component signal samples or frequency bands among a plurality of recording channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
    • H04N9/825—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the luminance and chrominance signals being recorded in separate channels

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

내용 없음

Description

FM기록 재생계의 노이즈 저감회로
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제5도는 본 원 발명의 비디오 노이즈 저감회로의 한 실시예를 나타낸 블록도.
제6도(A) 및 (B)는 기록재생신호의 저역 및 고역의 대역도
제7도는 대역분리회로의 위상대 주파수 특성을 나타낸 그래프.

Claims (4)

  1. 자기기록매체의 복수개의 별개의 트랙상에 적색, 청색 및 녹색의 원색 비디오 신호성분을 기록하기에 적합한 기록장치에 사용하는 FM 기록 재생계의 노이즈 저감회로에 있어서,
    적색 및 청색 원색의 비디오 신호성분을 FM 변조하고, 이 FM 변조된 신호를 자기 기록매체의 별개의 트랙에 기록하는 수단과,
    적색, 청색 및 녹색 원색의 비디오신호성분을 매트릭스하여 대역이 넓은 휘도신호를 생성하는 매트릭스회로(2)와,
    매트릭스회로에 접속되어, 대역이 넓은 휘도신호를 저역 및 고역 휘도신호로 분리하는 대역분리회로(10)와,
    고역 휘도신호의 저레벨성분을 신장하도록 대역분리회로에 접속되어, 레벨신장된 고역 휘도신호를 생성하는 수(14)단(15)과,
    저역휘도신호와 레벨신장된 고역 휘도신호를 가산하는 가산기 회로(3)와,
    가산기회로에 접속되어, 가산된 휘도신호를 시간기준 신장하고, 시간기준 신장된 휘도신호를 대역이 좁은 휘도신호로 분리하는 수단(3)과,
    대역이 좁은 휘도신호를 FM 변조하고, 이 FM 변조된 신호를 자기기록매체의 별개의 트랙에 기록하는 수단으로 이루어진 것을 특징으로 하는 FM 기록재생계의 노이즈 저감회로.
  2. 제1항에 있어서, 대역분리회로는 매트릭스회로에 접속되어 저역휘도신호를 전달하기 위한 고역 휘도신호의 최저역주파수에 대응하는 차단주파수를 가지는 로우패스필터(11)와, 저역 휘도 신호에 대응하는 대역이 넓은 휘도신화와 타이밍이 맞도록 매트릭스회로에 접속된 지연회로(12)와, 지연회로에서 공급된 대역이 넓은 휘도신호로부터 로우패스필터에서 공급된 저역 휘도신호를 감산하는 감산기를 포함하는 것을 특징으로 하는 FM 기록 재생계의 노이즈 저감회로.
  3. 제2항에 있어서, 로우페스필터는 약 10㎒의 차단주파수를 가지는 것을 특징으로 하는 FM 기록 재생계의 노이즈 저감회로.
  4. 제1항에 있어서, 대역이 넓은 휘도신호는 약 20㎒의 차단주파수를 가지며, 대역이 좁은 휘도신호는 약10㎒의 차단주파수를 가지는 것을 특징으로 하는 FM기록 재생게의 노이즈 저감회로.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019870003076A 1986-04-08 1987-04-01 Fm기록재생계의 노이즈저감회로 KR950013380B1 (ko)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP80886 1982-05-13
JP86-80886 1986-04-08
JP61080886A JPH0760566B2 (ja) 1986-04-08 1986-04-08 Ｆｍ録再系のノイズ低減回路

Publications (2)

Publication Number Publication Date
KR870010536A true KR870010536A (ko) 1987-11-30
KR950013380B1 KR950013380B1 (ko) 1995-11-02

Family

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Application Number Title Priority Date Filing Date
KR1019870003076A KR950013380B1 (ko) 1986-04-08 1987-04-01 Fm기록재생계의 노이즈저감회로

Country Status (4)

Country Link
US (1) US4802016A (ko)
EP (1) EP0241214A3 (ko)
JP (1) JPH0760566B2 (ko)
KR (1) KR950013380B1 (ko)

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JPH01117573A (ja) * 1987-10-30 1989-05-10 Pioneer Electron Corp ビデオ信号のノイズ抑制装置
JPH0832064B2 (ja) * 1987-12-29 1996-03-27 松下電器産業株式会社 磁気記録再生装置
DE58909746D1 (de) * 1989-11-18 1996-11-28 Itt Ind Gmbh Deutsche Verfahren und Vorrichtung zur Frequenzmodulation
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CN101489033B (zh) * 2008-01-15 2010-09-22 华晶科技股份有限公司 基于最佳原色信号的抑制图像噪声方法

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Also Published As

Publication number Publication date
EP0241214A2 (en) 1987-10-14
EP0241214A3 (en) 1989-11-23
KR950013380B1 (ko) 1995-11-02
US4802016A (en) 1989-01-31
JPS62239381A (ja) 1987-10-20
JPH0760566B2 (ja) 1995-06-28

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