KR930004029Y1 - Autovelosity converting device for vtr playing - Google Patents
Autovelosity converting device for vtr playing Download PDFInfo
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- KR930004029Y1 KR930004029Y1 KR2019870022449U KR870022449U KR930004029Y1 KR 930004029 Y1 KR930004029 Y1 KR 930004029Y1 KR 2019870022449 U KR2019870022449 U KR 2019870022449U KR 870022449 U KR870022449 U KR 870022449U KR 930004029 Y1 KR930004029 Y1 KR 930004029Y1
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- vtr
- playing
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
- G11B15/44—Speed-changing arrangements; Reversing arrangements; Drive transfer means therefor
- G11B15/442—Control thereof
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
- G11B15/46—Controlling, regulating, or indicating speed
-
- 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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- Television Signal Processing For Recording (AREA)
Abstract
내용 없음.No content.
Description
제1도는, 본 고안의 블록구성도.1 is a block diagram of the present invention.
제2도는, 본 고안의 정류 스위칭 회로부(5), (8)의 상세 회로도.2 is a detailed circuit diagram of the rectifier switching circuits 5 and 8 of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 프리앰프 2 : FM 복조기1: preamplifier 2: FM demodulator
3: 동기 검출부 4 : 증폭기3: synchronization detector 4: amplifier
5 : 정류 스위칭부 6 : 콘트롤 검출부5: rectification switching part 6: control detection part
7 : 증폭기 8 : 정류 스위칭부7: amplifier 8: rectification switching unit
9 : 노어 게이트 10 : 마이크로 프로세서9: NOR gate 10: microprocessor
D1, D2: 다이오드 R1~R6: 저항D 1 , D 2 : Diodes R 1 to R 6 : Resistance
C1, C2: 콘덴서 Q1~Q4: 트랜지스터C 1 , C 2 : capacitor Q 1 ~ Q 4 : transistor
HD : 드럼 헤드 HC : 콘트롤 헤드HD: Drum Head HC: Control Head
본 고안은, VTR에 있어서, 테이프 재생시에 녹화되어 있지 않은 부분이나 또는 손상된 부분이 있을 경우에 정속주행으로부터 고속주행으로 자동 변속하여, 불필요한 영상잡음이 나타나는 화면을 시청하지 않도록 하는 자동 변속장치에 관한 것이다.The present invention relates to an automatic transmission in which VTR automatically shifts from constant speed to high speed driving when there is an unrecorded part or damaged part at the time of playing a tape, so that the user cannot watch a screen in which unnecessary video noise appears. will be.
종래에는, 비데오 테이프를 재생하기 위하여, 사용자가 테이프를 TVR에 장착하고, 재생(PLAY)보턴을 누르면, 비데오신호 재생계에서, 재생 출력신호가 헤드의 CH-1 및 CH-2에 의하여 픽업되어, 플립플롭 신호에 의해 스위칭됨으로서 교호로 검출되며, 프리앰프를 통하여 증폭된후 휘도신호아 색신호로 분리된다.Conventionally, in order to play a video tape, when the user mounts the tape on the TVR and presses the PLAY button, the video output signal is picked up by the CH-1 and CH-2 of the head. The signal is alternately detected by being switched by a flip-flop signal, amplified by a preamplifier, and separated into a luminance signal and a color signal.
휘도신호는 고역필터에 공급되어 FM신호만이 인출되어, 리미터되고, AM성분이 제거된 후에 FM복조회로에 입력된다.The luminance signal is supplied to the high pass filter so that only the FM signal is drawn out, the limiter is input, and the AM component is removed and then input to the FM demodulation circuit.
복조회로의 출력신호는 디엠피시스 회로에 공급되어 주파수 특성이 보정되며, 클램프 회로를 거쳐 믹서에서 색신호와 혼합된다.The output signal of the demodulation circuit is supplied to the de-empsis circuit to correct the frequency characteristic and mixed with the color signal in the mixer via the clamp circuit.
또한, 색신호는, 629KHz의 저역변환 반송 색신호로 되어, 필터를 통해 버스트 엠피시스 된후, 3.58㎒ 발진기와 위상비교하여 재생휘도 신호로부터 수평동기 신호를 분리하고 출력된다.In addition, the color signal is a low-conversion carrier color signal of 629 KHz, is burst emulated through a filter, and then is horizontally compared with the 3.58 MHz oscillator to separate the horizontal synchronizing signal from the reproduction luminance signal and output.
출력된 색신호는 믹서에서 휘도신호와 혼합되어 비데오 출력신호로 된다.The output color signal is mixed with the luminance signal by the mixer to become a video output signal.
즉, 비데오 신호 재생계는, 테이프에 기록된 신호의 유무에 관계없이, 헤드의 스위칭에 따라 교호로 검출되는 FM신호를 증폭 및 복조하도록 되어 있기 때문에, 저주파신호의 입력 여부와 관계없이 테이프가 정속으로 주행하게 되며, 따라서 테이프의 녹화되 부분이 없는 경우나 또는 손상된 부분에서의 저주파 잡음이 화면상에 그대로 나타나게 되므로, 사용자는 그 화면을 그대로 보던가, 직접 고속주행(CUE)보턴을 눌러야만 하는 불편이 있었다.That is, since the video signal reproducing system is configured to amplify and demodulate the FM signal alternately detected according to the switching of the head regardless of the presence or absence of a signal recorded on the tape, the tape is continuously driven regardless of the input of the low frequency signal. The low frequency noise in the case where there is no recorded part of the tape or the damaged part is displayed on the screen. Therefore, the user has to view the screen as it is or press the CUE button directly. There was this.
본 고안은 이와 같은 종래의 문제점을 해결하기 위한 것으로서, 간단한 스위칭 회로를 부가하여 비녹화 부분 또는 손상된 부분이 화면상에 나타날 경우에는 자동적으로 고속주행 상태가 되도록 하여 항상 깨끗하고 선명한 화면을 시청할 수 있도록 안출한 것으로서, 이를 첨부된 도면에 의하여 상세히 설명하면 다음과 같다.The present invention is to solve such a conventional problem, and by adding a simple switching circuit, when a non-recorded part or a damaged part appears on the screen to automatically run at high speed so that you can always watch a clear and clear screen As described, it will be described in detail by the accompanying drawings as follows.
제1도에서와 같이, 드럼 헤드(HD)의 영상신호가 프리앰프(1)를 거쳐 증폭되고, 이어서 FM복조기(2)에서 복조되며, 동기검출부(3)를 거쳐 정류스위칭부(4)를 통해 노어게이트(9)로 입력되며, 콘트롤 헤드(HC)로부터의 콘트롤 신호는, 콘트롤 검출부(6)에서 검출된후, 증폭기(7)에서 증폭되고, 이어서 정류스위칭부(8)를 통해 상기 노어게이트(9)로 입력되며, 노어게이트(9)의 출력신호는 마이크로 프로세서(10)에 입력되도록 연결 구성된다.As shown in FIG. 1, the video signal of the drum head HD is amplified via the preamplifier 1, and then demodulated by the FM demodulator 2, and the rectifying switching unit 4 is passed through the synchronous detection unit 3. As shown in FIG. The control signal from the control head HC is detected by the control detector 6, then amplified by the amplifier 7, and then through the rectifying switch 8. The input signal is input to the gate 9, and the output signal of the NOR gate 9 is connected to the microprocessor 10.
또한 제2도는, 제1도에 증폭기(4), (7)를 통하여 증폭된 신호가 각각 다이오드(D1), (D2) 및 일단이 접지된 콘덴서(C1), (C2)를 통하여 트랜지스터(Q1), (Q3)의 베이스에 입력되고, 트랜지스터(Q1), (Q3)의 에미터는 접지되며, 각각의 콜렉터는 트랜지스터(Q2), (Q4)의 베이스에 접속되며, 트랜지스터(Q2), (Q4)의 에미터는 각각 접지된 저항(R3), (R6)을 통하여 노어게이트(9)로의 2입력단에 접속되도록 구성된다.2 shows the diodes D 1 , D 2 and one end of the capacitor C 1 , C 2 grounded by the amplifiers 4 and 7 respectively. to the base of through the transistor (Q 1), (Q 3 ) is input to the base, the transistor (Q 1), the emitter is grounded, and each collector of the (Q 3) is a transistor (Q 2), (Q 4 ) Connected, and the emitters of transistors Q 2 and Q 4 are configured to be connected to two input terminals to the north gate 9 via grounded resistors R 3 and R 6 , respectively.
미설명 부호 B+는 직류전원 단자이다.Unexplained symbol B + is a DC power supply terminal.
이와 같이 구성된 본 고안의 작용효과를 설명하면 다음과 같다.Referring to the effect of the present invention configured as described above are as follows.
비데오 신호의 유·무에 따라 동기검출부(3)에서 검출된 신호는 증폭기(4)를 통하여 증폭되어 다이오드(D1)에 입력되고, 다이오드(D1) 및 콘덴서(C1)에 의하여 정류된 직류 성분이 트랜지스터(Q1)의 베이스에 입력되면, 신호가 있을 때의 트랜지스터(Q1)는 온 됨에 따라 트랜지스터(Q4)가 오프되어 에미터 출력은 로우 상태가 된다.The signal detected by the synchronous detector 3 in accordance with the oil, free of the video signal is amplified through the amplifier 4 is input to the diode (D 1), a diode (D 1) and rectified by a capacitor (C 1) when the direct current component input to the base of the transistor (Q 1), the transistor (Q 1) when the user signal, the transistor (Q 4) is turned off as the output on the emitter is in the low state.
또한, 증폭기(7)에서 증폭된 콘트롤신호는 다이오드(D2)에 입력되고, 다이오드(D2) 및 콘덴서(C2)에 의하여 정류된 직류 성분이 트랜지스터(Q3)의 베이스에 입력되면, 신호가 있을 때에 트랜지스터(Q3)는 온 되고, 트랜지스터(Q4)가 오프되어 에미터 출력은 로우 상태가 된다.Further, the control signal amplified by the amplifier 7 is input to the diode (D 2), the direct current component rectified by a diode (D 2) and a condenser (C 2) is input to the base of the transistor (Q 3), When there is a signal, transistor Q 3 is turned on, transistor Q 4 is turned off, and the emitter output goes low.
한편, 신호가 없을 때는 트랜지스터(Q3)가 오프되고 트랜지스터(Q4)가 온되어 에미터 출력은 하이 상태가 된다.On the other hand, when there is no signal, transistor Q 3 is turned off and transistor Q 4 is turned on so that the emitter output is high.
따라서, 트랜지스터(Q2) 및 (Q4)의 출력이 모두 하이 상태로 노어게이트(9)에 입력된 경우에만 노어게이트(9)의 출력이 로우 상태로 된다.Therefore, the output of the NOR gate 9 becomes low only when the outputs of the transistors Q 2 and Q 4 are both input to the NOR gate 9 in a high state.
노어게이트(9)의 출력단에 접속되는 마이크로 프로세서(10)의 변속 장치는, 하이 상태일 때에만 정속주행되도록 되어 있고, 로우 상태가 입력되면 고속주행되도록 되어 있기 때문에 영상신호 및 콘트롤 신호가 함께 입력되지 않는 경우에는 정속주행에서 고속주행 상태로 자동 변속된다.Since the transmission of the microprocessor 10 connected to the output terminal of the NOR gate 9 is driven at a constant speed only when it is in a high state and is driven at high speed when a low state is input, the video signal and the control signal are input together. If it does not, it automatically shifts from constant speed to high speed.
이상에서와 같이 동작되는 본 고안은, 비데오 테이프의 재생시에, 녹화가 안된 부분이나 또는 손상된 부분이 있을 때에는 정속주행 상태에서 고속주행 상태로 자동 변속되어, 잡음에 따라 불량한 화면을 시청하지 않고, 사용자가 직접 고속주행 버튼을 누를 필요가 없는 자동변속장치를 제공하는 것이다.The present invention, which operates as described above, automatically shifts from the constant speed state to the high speed state when there is an unrecorded part or a damaged part at the time of playing a video tape, so that the user does not watch a bad screen according to the noise. Provides automatic transmission without the need to press the high-speed drive button.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019870022449U KR930004029Y1 (en) | 1987-12-19 | 1987-12-19 | Autovelosity converting device for vtr playing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019870022449U KR930004029Y1 (en) | 1987-12-19 | 1987-12-19 | Autovelosity converting device for vtr playing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR890014497U KR890014497U (en) | 1989-08-10 |
| KR930004029Y1 true KR930004029Y1 (en) | 1993-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019870022449U KR930004029Y1 (en) | 1987-12-19 | 1987-12-19 | Autovelosity converting device for vtr playing |
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| Country | Link |
|---|---|
| KR (1) | KR930004029Y1 (en) |
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1987
- 1987-12-19 KR KR2019870022449U patent/KR930004029Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR890014497U (en) | 1989-08-10 |
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