KR100254490B1 - Video signal dubbing circuit of double deck VCR - Google Patents

Video signal dubbing circuit of double deck VCR Download PDF

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KR100254490B1
KR100254490B1 KR1019920008933A KR920008933A KR100254490B1 KR 100254490 B1 KR100254490 B1 KR 100254490B1 KR 1019920008933 A KR1019920008933 A KR 1019920008933A KR 920008933 A KR920008933 A KR 920008933A KR 100254490 B1 KR100254490 B1 KR 100254490B1
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South Korea
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signals
signal
output
video signal
luminance
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KR1019920008933A
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KR930023981A (en
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안재춘
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구자홍
엘지전자주식회사
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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
    • 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
    • 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/90—Tape-like record carriers

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Television Signal Processing For Recording (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)

Abstract

PURPOSE: A circuit for dubbing video signals of a double deck VCR(Video Cassette Recorder) is provided to input a reproduced luminance signal and a color signal in video signal recorders without synthesizing the two signals in a dubbing process, so as to prevent interferences between the signals and to prevent a low frequency noise signal of the luminance signal from being generated to prevent a phase error of the color signal. CONSTITUTION: Reproducers(11,21) process reproductive signals of video heads of the first and the second deck, and separate the signals into luminance signals(Y11,Y12) and color signals(C11,C12), then output the separated signals. Mixers(12,22) mix the outputted signals of the reproducers(11,21), and output the mixed signals as composite video signals. Comb filters(13,23) separate the inputted composite video signals into luminance signals(Y12,Y22) and color signals(C12,C22). Selection switches(SW11,SW12,SW21,SW22) selectively output outputted signals of the reproducers(21,11) and the comb filters(13,23). Recorders(14,24) record output signals of the selection switches(SW11,SW12,SW21,SW22), and output the recorded signals to the video heads of the first and the second deck.

Description

더블데크 VCR의 영상신호 더빙회로Video signal dubbing circuit of double deck VCR

제1도는 종래의 더빙 회로도.1 is a conventional dubbing circuit diagram.

제2도는 본 발명의 더빙 회로도.2 is a dubbing circuit diagram of the present invention.

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

11,21 : 재생계 12,22 : 혼합기11,21: regeneration system 12,22: mixer

13,23 : 콤필터 14,24 : 기록계13,23: comb filter 14,24: recorder

SW11,SW12,SW21,SW22 : 선택스위치 Y11,Y12,Y21,Y22 : 휘도신호SW11, SW12, SW21, SW22: Selection switch Y11, Y12, Y21, Y22: Luminance signal

C11,C12,C21,C22 : 칼라신호C11, C12, C21, C22: color signal

본 발명은 두개의 데크를 구비하고 있는 더블데크 VCR에 있어서, 더빙시 테이프에서 재생된 휘도/칼라신호를 합성하지 않고 분리된 상태로 다른 데크의 영상기록계에 입력시켜 테이프에 기록하는 더블데크 VCR의 영상신호 더빙회로에 관한 것이다.The present invention relates to a double-deck VCR having two decks, in which a luminance / color signal reproduced on a tape is inputted to a video recorder of another deck in a separated state without being synthesized without duplexing. A video signal dubbing circuit.

종래의 더블데크 VCR은 하나의 데크 시스템에서 테이프의 재생 휘도/칼라신호를 합성하여 복합 영상신호로 변환한후 다른 하나의 데크 시스템으로 입력시키고, 다른 하나의 데크 시스템은 그 입력되는 복합영상신호의 이득을 조절하고 다시 휘도/칼라신호로 분리한후 테이프에 기록하였다.Conventional double-deck VCR combines the playback luminance / color signal of a tape in one deck system, converts it into a composite video signal, and inputs it to the other deck system. The gain was adjusted and separated by luminance / color signal and recorded on tape.

즉, 종래의 더블데크 VCR은 제1도에 도시된 바와같이, 방송신호를 튜닝하는 튜너부(1)와, 복합영상신호를 기록 및 재생하는 제1데크 시스템(2) 및 제2데크 시스템(3)과, 상기 튜너부(1) 및 제2데크 시스템(3)의 출력 복합영상신호를 상기 제1데크 시스템(2)에 선택적으로 입력시키는 아날로그 스위치(ESW1)와 상기 튜너부(1) 및 제1데크 시스템(2)의 출력 복합영상 신호를 상기 제2데크 시스템(3)에 선택적으로 입력시키는 아날로그 스위치(ESW2)와, 상기 아날로그 스위치(ESW1,ESW2)의 동작을 제어하는 저항(R1) 및 선택스위치(SW1)와, 상기 제1 및 제2데크 시스템(2)(3)의 출력 복합영상신호를 선택 출력하는 아날로그 스위치(ESW3)와, 상기 아날로그 스위치(ESW3)의 동작을 제어하는 선택스위치(SW2)로 구성하였다.That is, the conventional double deck VCR has a tuner unit 1 for tuning a broadcast signal, a first deck system 2 for recording and reproducing a composite video signal, and a second deck system as shown in FIG. 3) and an analog switch (ESW1) and the tuner unit (1) for selectively inputting the output composite video signal of the tuner unit (1) and the second deck system (3) to the first deck system (2); An analog switch ESW2 for selectively inputting the output composite video signal of the first deck system 2 to the second deck system 3, and a resistor R1 for controlling the operation of the analog switches ESW1 and ESW2. And a selection switch SW1, an analog switch ESW3 for selectively outputting the output composite video signal of the first and second deck systems 2, 3, and an operation for controlling the operation of the analog switch ESW3. It consisted of a switch (SW2).

제1도의 도면 설명중 미설명부호 B1+는 전원이다.In the drawing description of FIG. 1, reference numeral B1 + denotes a power source.

이와같이 구성된 종래의 더블데크 VCR은 전원(B1+)이 인가된 상태에서 선택스위치(SW1)를 개방시키면, 전원(B1+)이 저항(R1)을 통해 아날로그 스위치(ESW1)(ESW2)의 제어단자가 인가되므로 아날로그 스위치(ESW1)(ESW2)의 가동단자가 일측 고정단자(a1)(a2)에 각기 접속된다.In the conventional double-deck VCR configured as described above, when the selection switch SW1 is opened while the power supply B1 + is applied, the power supply B1 + is connected to the control terminal of the analog switch ESW1 and ESW2 through the resistor R1. Since is applied, the movable terminals of the analog switches ESW1 and ESW2 are connected to the fixed terminals a1 and a2, respectively.

그러면 튜너부(1)가 방송신호를 튜닝하여 출력하는 복합영상신호가 아날로그 스위치(ESW1)를 통해 제1데크 시스템(2)에 입력되어 처리되고, 영상신호의 더빙시에는 제1데크 시스템(2)이 테이프를 재생하여 복합영상신호를 출력하고, 출력한 복합영상신호는 아날로그 스위치(ESW2)를 통해 제2데크 시스템(3)에 입력되어 처리 및 테이프에 기록된다.Then, the composite video signal, which is tuned by the tuner unit 1 and outputs the broadcast signal, is input to the first deck system 2 through the analog switch ESW1, and is processed. When the video signal is dubbed, the first deck system 2 ) Reproduces the tape and outputs the composite video signal, and the output composite video signal is input to the second deck system 3 through the analog switch ESW2, and recorded on the tape.

그리고 선택스위치(SW1)를 접속시킬 경우에는 아날로그 스위치(ESW1)(ESW2)의 제어단자에 저전위가 인가되어 가동단자가 타측 고정단자(b1)(b2)에 각기 접속된다.When the selection switch SW1 is connected, a low potential is applied to the control terminals of the analog switches ESW1 and ESW2 so that the movable terminals are connected to the other fixed terminals b1 and b2, respectively.

그러면 튜너부(1)가 방송신호를 튜닝하여 출력하는 복합영상신호가 아날로그 스위치(ESW2)를 통해 제2데크 시스템(3)에 입력되어 처리되고, 영상신호의 더빙시에는 제2데크 시스템(3)이 테이프를 재생하여 복합영상신호를 출력하고, 출력한 복합영상신호는 아날로그 스위치(ESW1)를 통해 제2데크 시스템(2)에 입력되어 처리 및 테이프에 기록된다.Then, the composite video signal, which is tuned by the tuner unit 1 and outputs the broadcast signal, is input to the second deck system 3 through the analog switch ESW2, and is processed. When the video signal is dubbed, the second deck system 3 ) Reproduces the tape and outputs the composite video signal, and the output composite video signal is inputted to the second deck system 2 through the analog switch ESW1 and processed and recorded on the tape.

한편, 선택스위치(SW2)를 개방 및 접속시킴에 따라 아날로그 스위치(ESW3)의 가동단자가 일측 단자(a3) 및 타측단자(b3)에 절환 접속되어 제1 및 제2데크 시스템(3)의 출력 복합영상신호를 선택 출력한다.On the other hand, as the selector switch SW2 is opened and connected, the movable terminal of the analog switch ESW3 is switched to one terminal a3 and the other terminal b3 to output the first and second deck systems 3. Selective output of composite video signal.

그러나 상기와 같은 종래의 더블데크 VCR은 더빙시 테이프의 재생신호가 휘도신호 및 칼라신호를 혼합한 복합영상신호로 입력되므로 이를 저역통과필터 및 대역통과필터를 사용하여 휘도신호 및 칼라신호로 분리 및 테이프에 기록해야 되는 것으로 잡음의 발생을 방지하기 이하여 필터의 대역폭을 좁게 설정할 경우에는 휘도신호 및 칼라신호가 왜곡되고, 대역폭을 넓게 설정하면 휘도 및 칼라신호가 완전하게 분리되지 않는 등의 문제점이 있었다.However, in the conventional double deck VCR as described above, since the playback signal of the tape is input as a composite video signal in which the luminance signal and the color signal are mixed, it is separated into the luminance signal and the color signal using a low pass filter and a band pass filter. In order to prevent noise from being recorded on the tape, the luminance and color signals are distorted when the bandwidth of the filter is narrowed, and the luminance and color signals are not completely separated when the bandwidth is wide. there was.

본 발명은 상기와 같은 종래의 제반 문제점들을 해결하기 위하여 창안한 것으로서, 더빙시 테이프의 재생 휘도신호 및 칼라신호를 합성하지 않고, 그대로 영상신호 기록계에 입력시켜 기록하는 더빙회로를 제공하는데 목적이 있는 것으로 이를 첨부된 제2도의 도면을 참조하여 상세히 설명한다.SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and an object thereof is to provide a dubbing circuit for inputting and recording a video signal recorder as it is without combining the reproduction luminance signal and color signal of the tape during dubbing. This will be described in detail with reference to the accompanying drawings of FIG. 2.

제2도는 본 발명의 더빙회로도로서 이에 도시된 바와같이, 본 발명은 제1 및 제2데크 시스템(10)(20)으로 구성된다.2 is a dubbing circuit diagram of the present invention, as shown therein, wherein the present invention consists of first and second deck systems 10 and 20.

제1 및 제2데크 시스템(10)(20)은 제1 및 제2데크의 영상헤드의 재생신호를 처리하여 휘도신호(Y11)(Y12) 및 칼라신호(C11)(C12)로 분리 출력하는 재생계(11)(21)와, 상기 재생계(11)(21)의 출력신호를 혼합하여 복합영상신호로 출력하는 혼합기(12)(22)와, 입력되는 복합영상신호를 휘도신호(Y12)(Y22) 및 칼라신호(C12)(C22)로 분리하는 콤필터(13)(23)와, 상기 재생계(21)(11) 및 콤필터(13)(23)의 출력신호를 선택 출력하는 선택스위치(SW11,SW12)(SW21,SW22)와, 상기 선택스위치(SW11,SW12)(SW21,SW22)의 출력신호를 기록 처리하여 제1데크 및 제2데크의 영상헤드로 출력하는 기록계(14)(24)로 구성하였다.The first and second deck systems 10 and 20 process the reproduction signals of the image heads of the first and second decks to separate and output the luminance signals Y11 and Y12 and the color signals C11 and C12. The playback system 11, 21, the mixer 12 and 22 for mixing the output signals of the playback system 11 and 21 and outputting the combined video signal as a composite video signal, and the input composite video signal as the luminance signal Y12. Outputs the comb filters 13 and 23 separated by the Y22 and the color signals C12 and C22, and the output signals of the regeneration systems 21, 11 and the comb filters 13 and 23, respectively. A recorder for recording and outputting the output signals of the select switches SW11 and SW12 (SW21 and SW22) and the output signals of the select switches SW11 and SW12 (SW21 and SW22) to the image heads of the first and second decks. 14) (24).

이와같이 구성된 본 발명의 더빙회로는 제1데크 시스템(10)의 재생신호를 제2데크 시스템(20)에서 기록하는 더빙동작을 할 경우에는 제2데크 시스템(20)의 선택스위치(SW21)(SW22)의 가동단자가 타측 고정단자(b21)(b22)에 접속되게 한후 제1 및 제2데크 시스템(10)(20)이 각기 재생 및 기록동작을 수행하게 한다.The dubbing circuit of the present invention configured as described above selects the switch SW21 (SW22) of the second deck system 20 when the dubbing operation of recording the reproduction signal of the first deck system 10 in the second deck system 20 is performed. The first and second deck systems 10 and 20 respectively perform the reproducing and recording operations after the movable terminals of the ") are connected to the other fixed terminals b21 and b22.

그러면 제1데크 시스템(10)의 영상헤드가 테이프에서 재생하는 재생신호는 재생계(11)에서 처리되어 휘도신호(Y11) 및 칼라신호(C11)로 출력되고, 출력된 휘도신호(Y11) 및 칼라신호(C11)는 혼합기(12)에서 혼합되어 복합영상신호로 출력됨과 아울러 제2데크 시스템(20)의 선택스위치(SW21)(SW22)를 통해 기록계(24)에 입력되어 처리 및 테이프에 기록된다.Then, the reproduction signal reproduced on the tape by the video head of the first deck system 10 is processed by the reproduction system 11 and output as the luminance signal Y11 and the color signal C11, and the output luminance signal Y11 and The color signal C11 is mixed in the mixer 12 and output as a composite video signal, and is input to the recorder 24 through the selector switch SW21 (SW22) of the second deck system 20 to be processed and recorded on the tape. do.

그리고 제2데크 시스템(20)의 재생신호를 제1데크 시스템(10)에서 기록하는 더빙동작을 할 경우에 제1데크 시스템(10)의 선택스위치(SW11)(SW12)의 가동단자가 타측 고정단자(b11)(b12)에 접속되게 한후 제1 및 제2데크 시스템(10)(20)이 각기 기록 및 재생동작을 수행하게 한다.In addition, when the dubbing operation of recording the reproduction signal of the second deck system 20 in the first deck system 10 is performed, the movable terminal of the selection switch SW11 (SW12) of the first deck system 10 is fixed to the other side. After being connected to terminals b11 and b12, the first and second deck systems 10 and 20 respectively perform recording and reproducing operations.

그러면 제2데크 시스템(20)의 영상헤드가 테이프에서 재생하는 재생신호는 재생계(21)에서 처리되어 휘도신호(Y21) 및 칼라신호(C21)로 출력되고, 출력된 휘도신호(Y21) 및 칼라신호(C21)는 혼합기(22)에서 혼합되어 복합영상신호로 출력됨과 아울러 제1데크 시스템(10)의 선택스위치(SW11)(SW12)를 통해 기록계(14)에 입력되어 처리 및 테이프에 기록된다.Then, the reproduction signal reproduced on the tape by the video head of the second deck system 20 is processed by the reproduction system 21 and output as the luminance signal Y21 and the color signal C21, and the output luminance signal Y21 and The color signal C21 is mixed in the mixer 22 and output as a composite video signal, and is input to the recorder 14 through the selector switch SW11 (SW12) of the first deck system 10, and processed and recorded on the tape. do.

한편 선택스위치(SW11,SW12)(SW21,SW22)의 가동단자를 일측 고정단자(a11,a12)(a21,a22)에 접속시킬 경우에는 튜너부 및 외부로부터 입력되는 복합영상신호가 콤필터(13)(23)에서 휘도신호(Y12)(Y22) 및 칼라신호(C12)(C22)로 분리된후 선택스위치(SW11,SW12)(SW21,SW22)를 통해 기록계(14)(24)에 입력되어 테이프에 기록된다.On the other hand, when the movable terminals of the selector switches SW11 and SW12 (SW21 and SW22) are connected to the fixed terminals a11 and a12 (a21 and a22), the composite video signal inputted from the tuner unit and the external unit is a comb filter 13 23 is separated into luminance signals Y12 (Y22) and color signals C12 (C22), and then input to recorders 14 and 24 through selection switches SW11 and SW12 (SW21 and SW22). Written on tape.

이상에서 상세히 설명한 바와같이 본 발명은 더빙시 테이프의 재생 휘도신호 및 칼라신호를 합성하지 않고, 그대로 영상신호 기록계에 입력시켜 기록함으로써 휘도신호 및 칼라신호를 혼합하고 다시 분리할 때 발생되는 간섭이 방지되고, 휘도신호의 저주파 잡음신호의 발생이 방지되며, 칼라신호의 위상에러가 방지되는 등의 효과가 있다.As described in detail above, the present invention does not synthesize the reproduction luminance signal and the color signal of the tape during dubbing, and inputs them to the video signal recorder as it is, thereby preventing interference generated when mixing the luminance signal and the color signal and separating them again. The low frequency noise signal of the luminance signal is prevented, and the phase error of the color signal is prevented.

Claims (1)

제1 및 제2데크의 영상헤드의 재생신호를 처리하여 휘도신호(Y11)(Y12) 및 칼라신호(C11)(C12)로 분리 출력하는 재생계(11)(21)와, 상기 재생계(11)(21)의 출력신호를 혼합하여 복합영상신호로 출력하는 혼합기(12)(22)와, 입력되는 복합영상신호를 휘도신호(Y12)(Y22) 및 칼라신호(C12)(C22)로 분리하는 콤필터(13)(23)와, 상기 재생계(21)(11) 및 콤필터(13)(23)의 출력신호를 선택 출력하는 선택스위치(SW11,SW12)(SW21,SW22)와, 상기 선택스위치(SW11,SW12)(SW21,SW22)의 출력신호를 기록 처리하여 제1데크 및 제2데크의 영상헤드로 출력하는 기록계(14)(24)로 구성함을 특징으로 하는 더블데크 VCR의 영상신호 더빙회로.Playback systems 11 and 21 for processing the playback signals of the video heads of the first and second decks and outputting them separately as luminance signals Y11 (Y12) and color signals C11 (C12); (11) and (22) for mixing the output signals of the output signal (21) into a composite video signal, and converting the input composite video signal into luminance signals (Y12) and (Y22) and color signals (C12) and (C22). Separate comb filters (13) and (23), selector switches (SW11, SW12) (SW21, SW22) for selectively outputting the output signals of the regeneration systems (21) (11) and the comb filters (13) and (23); And a recorder (14) (24) for recording and outputting the output signals of the selection switches (SW11, SW12) (SW21, SW22) to the image heads of the first and second decks. Video signal dubbing circuit of VCR.
KR1019920008933A 1992-05-26 1992-05-26 Video signal dubbing circuit of double deck VCR KR100254490B1 (en)

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