KR930004525Y1 - Low pass filter co-using apparatus for recording and reproducing - Google Patents

Low pass filter co-using apparatus for recording and reproducing Download PDF

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Publication number
KR930004525Y1
KR930004525Y1 KR2019880006024U KR880006024U KR930004525Y1 KR 930004525 Y1 KR930004525 Y1 KR 930004525Y1 KR 2019880006024 U KR2019880006024 U KR 2019880006024U KR 880006024 U KR880006024 U KR 880006024U KR 930004525 Y1 KR930004525 Y1 KR 930004525Y1
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South Korea
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color signal
low pass
pass filter
signal
recording
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KR2019880006024U
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Korean (ko)
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KR890021717U (en
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임만규
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삼성전자 주식회사
안시환
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    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/77—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase
    • H04N9/78—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase for separating the brightness signal or the chrominance signal from the colour television signal, e.g. using comb filter

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

Abstract

내용 없음.No content.

Description

칼러신호 분리회로Color signal separation circuit

제1도는 종래의 칼라신호 분리 계통도.1 is a conventional color signal separation system.

제2도는 본 고안에 따른 실시 예시도.2 is an exemplary embodiment according to the present invention.

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

10 : 칼라신호 증폭부 20 : 스위칭부10: color signal amplifier 20: switching unit

30 : 칼라신호 처리단 40 : 제1버퍼30: color signal processing stage 40: first buffer

50 : 저역필터 60 : 제2버퍼50: low pass filter 60: second buffer

본 고안은 녹화 및 재생모드에서 칼라신호의 흐름이 하나의 저역필터등으로 형성된 루트(ROOT)를 통하도록 신호흐름을 스위칭하는 장치이다.The present invention is a device for switching the signal flow so that the flow of the color signal in the recording and playback mode through the ROOT formed by a single low pass filter.

일반적으로 사용자가 소망하는 임의의 데이터를 자기테이프상에 기록할 때 제1도의 칼라신호의 계통도에 의하면 칼라신호 처리단(30)에 629KHZ로 저역변환된 칼라신호가 저역필터(LPR1)를 통해 트랜지스터(Q1) 및 저항(R1~R3)으로 된 버퍼를 거쳐 FM변조된 위도신호와 혼합되어 자기 테이프상에 기록이 되고, 반면 자기 테이프상에 기록된 데이터를 재생하고자 복합영상신호를 픽업하면 칼라증폭단에서 칼라신호만 증폭되어 저역필터(LPR2)를 통해 칼라신호 처리단(30)으로 인가되어 자동칼라이득 제어(ACC)에 의해서 원신호 4.43MHZ로 복귀되어 재생이 된다.In general, when a user records desired data on a magnetic tape, according to the schematic diagram of the color signal of FIG. 1, the color signal, which is low-converted to 629 KH Z in the color signal processing stage 30, is passed through the low pass filter LPR1. It is mixed on the FM-modulated latitude signal through a buffer of transistors Q1 and resistors R1 to R3, and recorded on a magnetic tape, while picking up a composite video signal to reproduce data recorded on the magnetic tape Only the color signal is amplified by the amplifying stage and applied to the color signal processing stage 30 through the low pass filter LPR2 and returned to the original signal 4.43MH Z by automatic gain control (ACC) for reproduction.

이와 같이 칼라신호를 분리하는 종래에는 고가인 1.2MHZ의 저역필터를 두 개를 사용하므로 시스템 제조단가가 문제시 되었다.In the conventional method of separating color signals, a system manufacturing cost has been a problem because two expensive 1.2 MH Z low pass filters are used.

따라서 본 고안의 목적은 칼라신호를 분리하는데 있어 녹화 및 재생시에 휘도신호와 분리를 위하여 사용되는 저역필터를 겸용하도록 하여 시스템제조단가를 줄일 수 있는 장치를 제공하는데 있다.Therefore, an object of the present invention is to provide a device that can reduce the system manufacturing cost by using a low-pass filter used for separation from the luminance signal during recording and playback in separating the color signal.

이하, 첨부된 도면을 참조하여 본 고안의 목적을 달성할 수 있는 실시예를 상세히 기술하면 다음과 같다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

본 고안의 칼라신호 분리회로는 비데오헤드에서 픽업된 복합영상신호중에서 칼라신호만 증폭하도록 트랜지스터(Q1) 및 저항(R1~R5), 콘덴서(C1)(C2)로 구성이 된 칼라신호 증폭부(10)와, 녹화 및 재생모드시 칼라신호 흐름의 루트(ROOT)를 스위칭하도록 다이오드(D1~D3)와 트랜지스터(Q2) 및 저항(R6~R8)으로 구성된 스위칭부(20)와, 칼라신호 처리단(30)에서 녹화모드일 때 출력되는 칼라신호와 재생모드일 때 전술한 칼라신호 증폭부(10)에서 출력된 영상신호를 스위칭하는 스위칭부(20)를 통한 칼라신호를 버퍼링하는 제1버퍼(40)와, 완충된 칼라신호를 저역변환시키고 휘도신호를 제거하는 저역필터(50)와, 제2버퍼(60)등으로 같이 구성된다.The color signal separation circuit of the present invention has a color signal amplifying unit consisting of transistors Q1, resistors R1 to R5, and capacitors C1 and C2 to amplify only the color signals among the composite video signals picked up from the video head. 10), a switching unit 20 composed of diodes D1-D3, transistors Q2, and resistors R6-R8 to switch the root of the color signal flow in the recording and playback modes, and color signal processing. A first buffer for buffering the color signal outputted in the recording mode at the stage 30 and the color signal through the switching unit 20 for switching the video signal output from the above-described color signal amplifier 10 in the playback mode 40, a low pass filter 50 for low-pass converting the buffered color signal and removing the luminance signal, a second buffer 60, and the like.

상기한 바와 같은 구성을 가진 본 고안의 작동관계를 상세히 설명한다.It will be described in detail the operating relationship of the present invention having the configuration as described above.

먼저, 재생모드(PB)일 때 칼라신호의 흐름을 제어하는 과정을 살펴보면, 자기 테이프가 로딩이 되어 안착이 된후 재생모드가 선택이 되면 스위칭부(20)의 다이오드(D1)의 애노우드 단자와 트랜지스터(Q2)의 베이스 단자에 각각“하이”전압이 인가된 상태가 되므로 아이오드(D2)는“오프”상태가 되고, 반대로 다이오드(D3)는“온”상태가 된다.First, the process of controlling the flow of the color signal in the playback mode (PB), when the magnetic tape is loaded and seated, when the playback mode is selected and the anode terminal of the diode (D1) of the switching unit 20 and Since the "high" voltage is applied to each of the base terminals of the transistor Q2, the ion D2 is in the "off" state, and the diode D3 is in the "on" state.

따라서 비데오헤드에서 픽업된 복합영상신호와 재생앰프(PB AMP)를 통해 칼라신호 증폭부(10)에 인가되면 칼라신호만 증폭이 되어 결합콘덴서(C3)를 통해 스위칭부(20)에 인가된다.Therefore, when the composite video signal picked up from the video head and the reproduction amplifier PB AMP are applied to the color signal amplifier 10, only the color signal is amplified and applied to the switching unit 20 through the coupling capacitor C3.

스위칭부(20)에 인가된 복합영상신호는 다이오드(D3)를 통해 제1버퍼(40)에서 완충된후 저역필터(50)에서 휘도신호는 제거되고 칼라신호만 칼라신호 처리단(30)에 공급되어 원신호인 4.43HZ복귀되어 재생이 된다.After the composite image signal applied to the switching unit 20 is buffered in the first buffer 40 through the diode D3, the luminance signal is removed from the low pass filter 50 and only the color signal is transmitted to the color signal processing stage 30. 4.43H Z , which is the original signal, is returned and regenerated.

다음은 녹화모드일 때 칼라신호의 흐름을 제어하는 과정을 살펴보면, 사용자가 녹화모드를 선택하면 스위칭부(20)의 다이오드(D1)의 에노우드 단자와 트랜지스터(Q2)의 베이스 단자는 전위가“로우”로 되는바, 다이오드(D1)는“오프”가 되고, 다이오드(D2)는“온”되며, 다이오드(D3)는“오프”된다.Next, referring to the process of controlling the flow of the color signal in the recording mode, when the user selects the recording mode, the potential of the base terminal of the transistor (Q2) and the base terminal of the diode (D1) of the switching unit 20 is " Low ", the diode D1 is" off ", the diode D2 is" on ", and the diode D3 is" off ".

따라서 녹화모드선택시 칼라신호 처리단(30)에서 출력되는 칼라신호가 콘덴서(C4)를 통해 스위칭부(20)에 인가된다.Therefore, when the recording mode is selected, the color signal output from the color signal processing stage 30 is applied to the switching unit 20 through the condenser C4.

스위칭부(20)에 인가된 칼라신호는 다이오드(D2)를 거쳐 제1버퍼(40)에서 완충되고 저역필터(50)를 통해 저역변환되어 제2버퍼(50)를 거쳐서 FM 변환된 휘도신호와 혼합되어 자기테이프상에 수록된다.The color signal applied to the switching unit 20 is buffered in the first buffer 40 through the diode D2 and low-converted through the low pass filter 50 and FM-converted through the second buffer 50. It is mixed and stored on magnetic tape.

상술한 바와 같이 작동하는 본 고안의 작용 효과는 하나의 저역필터를 이용하여 녹화 및 재생시 휘도신호와 칼라신호를 분리함으로 시스템 제조단가가 저렴한 장점이 있다.The operational effect of the present invention, which operates as described above, has the advantage of low system manufacturing cost by separating the luminance signal and the color signal during recording and playback using one low pass filter.

Claims (1)

테이프로부터 픽업된 신호중 칼라신호성분을 증폭하는 칼라신호 증폭부(10)와, 재생모드선택신호(PB)에 응답하여 재생시에는 상기 칼라신호 증폭부(10)의 출력신호를 통과시키고, 기록시에는 저역변환된 칼라신호를 통과시키기 위한 스위칭수단(20)과, 상기 스위칭수단(20)에서 선택되어 츨력되는 신호를 버퍼링하는 제1버퍼(40)와, 상기 제1버퍼(40)에서 출력되는 신호중 칼라신호성분만 퉁과시키기 위한 저역통과필터(50)와, 기록시에 상기 저역통과필터(50)를 통과한 칼라신호를 버퍼링하여 출력하는 제2버퍼(60), 그리고 기록시에는 상기 저역변환된 칼라신호를 상기 스위칭수단(20)에 공급하고, 재생시에는 상기 저역통과필터(50)를 통과한 재생칼라신호를 입력하여 칼라신호를 처리하는 칼라신호처리단(30)를 구비한 것을 특징으로 하는 칼라신호 분리회로.The color signal amplifying section 10 which amplifies the color signal components among the signals picked up from the tape, and the output signal of the color signal amplifying section 10 passes through the color signal amplifying section 10 during playback in response to the playback mode selection signal PB. Among the signals output from the switching means 20, the first buffer 40 for buffering the signal selected and output by the switching means 20, and the signal output from the first buffer 40 A low pass filter 50 for filtering out only the color signal components, a second buffer 60 for buffering and outputting the color signal passing through the low pass filter 50 at the time of recording, and the low pass conversion at the time of recording And a color signal processing stage (30) for supplying the color signal to the switching means (20) and inputting the reproduction color signal passing through the low pass filter (50) to process the color signal. Color signal separation circuit.
KR2019880006024U 1988-04-27 1988-04-27 Low pass filter co-using apparatus for recording and reproducing KR930004525Y1 (en)

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Application Number Priority Date Filing Date Title
KR2019880006024U KR930004525Y1 (en) 1988-04-27 1988-04-27 Low pass filter co-using apparatus for recording and reproducing

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Application Number Priority Date Filing Date Title
KR2019880006024U KR930004525Y1 (en) 1988-04-27 1988-04-27 Low pass filter co-using apparatus for recording and reproducing

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KR890021717U KR890021717U (en) 1989-11-03
KR930004525Y1 true KR930004525Y1 (en) 1993-07-21

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