KR900002631Y1 - Testing circuit of reproducing state of video cassette recorder - Google Patents
Testing circuit of reproducing state of video cassette recorder Download PDFInfo
- Publication number
- KR900002631Y1 KR900002631Y1 KR2019860020581U KR860020581U KR900002631Y1 KR 900002631 Y1 KR900002631 Y1 KR 900002631Y1 KR 2019860020581 U KR2019860020581 U KR 2019860020581U KR 860020581 U KR860020581 U KR 860020581U KR 900002631 Y1 KR900002631 Y1 KR 900002631Y1
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- video
- video signal
- recorded
- relay
- cassette recorder
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/36—Monitoring, i.e. supervising the progress of recording or reproducing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/10—Indicating arrangements; Warning arrangements
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- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
내용 없음.No content.
Description
제 1 도는 일반적으로 4개의 영상헤드가 설치된 헤드드럼을 보인 설명도.1 is an explanatory diagram showing a head drum in which four image heads are generally installed.
제 2 도는 본 고안의 녹화상태 확인회로도.2 is a recording state confirmation circuit of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 녹화영상신호계 2 : 녹화스위칭증폭기1: Recorded video signal meter 2: Recorded switching amplifier
3-10 : 증폭기 11,12 : 재생스위칭증폭기3-10: Amplifier 11,12: Regenerative Switching Amplifier
13 : 재생영상신호계 TR1,TR2: 릴레이13: Replay video signal system TR 1 , TR 2 : Relay
SW1: 녹화확인스위치 RL1: 릴레이SW 1 : Record confirmation switch RL 1 : Relay
Vcc : 전원단자 CH11,CH12,CH21,CH22: 영상헤드Vcc: Power supply terminal CH 11 , CH 12 , CH 21 , CH 22 : Video head
본 고안은 헤드드럼에 4개의 영상헤드를 설치한 비디오 카세트 레코더에 있어서, 영상신호를 비디오 테이프에 녹화할 경우에 그 녹화된 영상신호의 상태를 바로 재생시켜 확인할 수 있게한 비디오 카세트 레코더의 녹화 상태 확인회로에 관한 것이다.The present invention provides a video cassette recorder in which four video heads are provided in a head drum. In the video cassette recorder, when the video signal is recorded on a video tape, the recording state of the video cassette recorder can be immediately reproduced and confirmed. It relates to a confirmation circuit.
종래의 비디오 카세트 레코더는 영상신호를 녹화할 경우에 그 녹화되는 영상신호 상태를 바로 재생시켜 확인할 수 없게 구성하였으므로 사용자는 입력되는 영상신호를 비디오 테이프에 녹화시킨 후 다시 처음부터 재생시키면서 영상신호의 녹화상태를 확인해야 되어 사용자에게 많은 번거러움을 줌은 물론 많은 시간이 소요되는 결함이 있었다.In the conventional video cassette recorder, when a video signal is recorded, the video signal state is not immediately reproduced so that the user can record the video signal while recording the video signal on the video tape and playing it again from the beginning. It was necessary to check the status, which bothered the user and was time consuming.
본 고안은 이와같은 종래의 결함을 감안하여, 헤드드럼에 설치된 4개의 영상헤드중에서 2개의 영상헤드로는 입력되는 영상신호를 비디오 테이프에 녹화하고, 나머지 2개의 영상헤드로는 그 녹화된 영상신호를 재생시켜 영상신호의 녹화상태를 바로 확인할 수 있게 안출한 것으로, 이를 첨부된 도면에 의하여 상세히 설명하면 다음과 같다.In view of such a conventional deficiency, the present invention records a video signal input to two video heads out of four video heads installed in a head drum on a video tape, and the recorded video signals to the remaining two video heads. It is designed to immediately check the recording state of the video signal by reproducing, described in detail by the accompanying drawings as follows.
제 1 도는 헤드드럼에 4개의 영상헤드가 설치된 상태를 보인 것이다. 여기서 부호 1은 헤드드럼이고, 그 헤드드럼(1)의 180°선상에는 영상헤드(CH11)(CH21)가 설치되어 있고, 그 영상헤드(CH11)(CH21)와 일정거리 떨어진 180°상에는 영상헤드(CH12)(CH22)가 트레이스하게 되어 있으며, 영상헤드(CH11)(CH21)는 SP모드시 비디오 테이프에 영상신호의 녹화 및 재생하는데 사용하고, 영상헤드(CH12)(CH22)는 EP모드시 영상신호의 녹화 및 재생하는데 사용된다.1 shows a state in which four image heads are installed in a head drum. Where numeral 1 denotes a head drum and, 180 ° line of the head drum (1) and the video heads (CH 11) (CH 21) are installed, the video heads (CH 11) (CH 21) a predetermined distance away 180 video head ° on (CH 12) (CH 22) is the trace, and the video heads (CH 11) (CH 21) are used for recording and reproducing a video signal on a video tape during the SP mode, the video heads (CH 12 (CH 22 ) is used to record and play back video signals in EP mode.
이와같이 헤드드럼(1)에 4개의 영상헤드(CH11)(CH12)(CH21)(CH22)를 설치한 비디오 카세트 레코더에 있어서, 본 고안은 영상신호를 녹화할 경우에 사용하지 않는 2개의 영상헤드(CH12)(CH22)로 녹화된 영상신호를 재생하여 비디오 테이프에 녹화된 영상신호의 상태를 확인할 수 있게 한 것이다. 제 2 도는 상기와 같이 영상헤드(CH11)(CH21)로 영상 신호를 녹화할 경우에 사용하지 않는 2의 영상 헤드(CH12)(CH22)로 녹화된 영상신호를 재생하여(녹화상태를 확인하는 본 고안의 회로도로서, 이에 도시한 바와 같이 녹화영상신호계(1) 및 녹화스위칭증폭기(2), 증폭기(3-10), 재생스위치증폭기(11,12), 재생영상신호계(13), 영상헤드(CH11, CH12, CH12, CH21, CH22)로 된 비디오 카세트 레코더에 있어서, 전원단자(Vcc)에 접속된 녹화확인스위치(SW1)를 콜렉터가 재생제어신호단자(PBH)에 접속된 트랜지스터(TR1)의 베이스에 접속하여 트랜지스터(TR1)의 에미터를 저항(R1) 및 콘덴서(C1), 베이스가 접지된 트랜지스터(TR2)의 에미터에 접속하고, 트랜지스터(TR2)의 콜렉터는 재생스위칭증폭기(12)의 제어단자에 접속하며, 상기 스위치(SW1)를 릴레이(RL1)에 접속하여 릴레이(RL1)의 스위치(RL11)(RL12)의 가동단자를 상기 녹화 및 재생영상신호계(1)(13)의 출력단자에 접속한 것으로, 상기에서 재생제어신호단자(PBH)는 재생시 고전위 신호가 입력되고, 스위치(RL11)(RL12)는 릴레이(RL1)가 구동될때 각기 단락 및 개방되게 한다.In the video cassette recorder provided with four video heads CH 11 (CH 12 ) (CH 21 ) (CH 22 ) in the head drum 1 as described above, the present invention does not use 2 to record a video signal. The video signals recorded by the two video heads CH 12 and CH 22 are reproduced to check the state of the video signals recorded on the video tape. FIG. 2 reproduces the video signal recorded by the video head CH 12 (CH 22 ), which is not used when recording the video signal with the video head CH 11 (CH 21 ) as described above (recording state). As the circuit diagram of the present invention for verifying, the recorded video signal system (1) and the recording switching amplifier (2), the amplifier (3-10), the playback switch amplifier (11, 12), the playback video signal system (13) In the video cassette recorder having the video heads CH 11 , CH 12 , CH 12 , CH 21 , and CH 22 , the collector checks the recording confirmation switch SW 1 connected to the power supply terminal Vcc. Connect to the base of transistor TR 1 connected to PBH and connect the emitter of transistor TR 1 to the resistor R 1 and capacitor C 1 , and to the emitter of transistor TR 2 with grounded base. The collector of transistor TR 2 is connected to the control terminal of regenerative switching amplifier 12, and the switch SW 1 is connected to relay RL 1 . Thus, the movable terminal of the switch RL 11 (RL 12 ) of the relay RL 1 is connected to the output terminal of the recording and reproducing video signal system 1, 13, where the regeneration control signal terminal PBH is Upon regeneration, a high potential signal is input and the switches RL 11 and RL 12 are shorted and opened respectively when the relay RL 1 is driven.
이와같이 구성된 본 고안의 작용효과를 상세히 설명하면 다음과 같다.Referring to the effects of the present invention configured in this way in detail as follows.
전원단자(Vcc)에 전원이 인가되고, 녹화영상신호계(1)에서 영상신호가 출력되어 녹화스위칭증폭기(2)에 입력되면, 녹화 스위칭 증폭기(2)는 비디오 테이프의 주행모드에 따라 선택적으로 출력하고, 그 출력된 영상신호는 증폭기(3,4) 또는 증폭기(5,6)를 통해 영상헤드(CH11, CH21) 또는 영상헤드(CH17, CH22)에 인가되어 비디오 테이프에 녹화된다.When power is supplied to the power supply terminal Vcc, and a video signal is output from the recorded video signal system 1 and input to the recording switching amplifier 2, the recording switching amplifier 2 selectively outputs according to the driving mode of the video tape. The output video signal is applied to the video heads CH 11 and CH 21 or the video heads CH 17 and CH 22 through the amplifiers 3 and 4 or the amplifiers 5 and 6 and recorded on the video tape. .
이때, SP 모드로 비디오 테이프를 주행시켜 영상헤드(CH11, CH12)로 영상신호를 기록할 경우에 사용자가 비디오 테이프에 녹화된 영상신호의 상태를 확인할 경우에 녹화확인스위치(SW1)를 단락시키면, 트랜지스터(TR1)의 베이스에 전원단자(Vcc)의 전원이 스위치(SW1)를 통해 인가되어 그가 온되고, 재생제어신호단자(PBH)의 고전위신호가 트랜지스터(TR1)의 에미터로 출력되어 트랜지스터(TR2)를 통해 재생스위칭증폭기(12)에 입력되므로 재생스위칭증폭기(12)는 영상헤드(CH12, CH22)가 비디오 테이프에 재생하여 증폭기(9)(10)에서 증폭된 재생영상신호를 스위칭 증폭하여 출력하고, 그 출력된 재생영상신화는 재생영상신호(13)를 통해 릴레이스위치(RL11)를 통해 릴레이스위치(RL11)에 인가되며, 이때 릴레이(RL1)는 전원단자(Vcc)의 전원이 스위치(SW1)를 통해 인가되어 구동되므로 릴레이스위치(RL11)가 단락되어 재생영상신호계(13)에서 출력된 재생영상신호는 스위치(RL11)를 통해 출력되고, 사용자는 비디오 테이프에 녹화된 영상신호를 볼 수 있게 된다.At this time, when recording the video signal with the video heads CH 11 and CH 12 by driving the video tape in the SP mode, the recording confirmation switch SW 1 is used when the user checks the state of the video signal recorded on the video tape. When the short circuit occurs, the power supply of the power supply terminal Vcc is applied to the base of the transistor TR 1 through the switch SW 1 and is turned on, and the high potential signal of the regeneration control signal terminal PBH is applied to the transistor TR 1 . The output switching emitter 12 is inputted to the regenerative switching amplifier 12 through the transistor TR 2 , so that the regenerative switching amplifier 12 reproduces the video heads CH 12 and CH 22 on the video tape so that the amplifiers 9 and 10 can be used. switching amplifier to output an amplified reproduction video signal, and the output reproduced video myth is applied to the relay switch (RL 11) through a relay switch (RL 11) through the reproduced video signal (13), wherein the relay (RL 1) the power of the power supply terminal (Vcc) switch (SW 1) It therefore is applied to drive the relay switch (RL 11) is short-circuited the reproduced video signal from the playback video signal system 13 is output via the switch (RL 11), it allows the user to view the video signal recorded on a video tape do.
그리고, 스위치(SW1)를 개방시키면, 재생스위치증폭기(12)에 저저위신호가 인가되어 동작하지 않고, 릴레이(RL1)도 구동되지 않아 스위치(RL12)가 단락되므로 녹화영상신호계(1)에서 출력되는 영상신호가 스위치(RL12)를 통해 출력되어 사용자는 비디오 테이프에 녹화되는 영상신호를 보게된다.When the switch SW 1 is opened, the low-low signal is applied to the regeneration switch amplifier 12 and does not operate. The relay RL 1 is also not driven and the switch RL 12 is short-circuited. ) Is output through the switch RL 12 so that the user sees the video signal recorded on the video tape.
이상에서 설명한 바와 같이 본 고안은 비디오 테이프에 영상신호를 녹화할 경우에 바로 재생하여 볼 수 있으므로 사용자가 녹화상태를 바로 확인할 수 있는 효과가 있다.As described above, the present invention has an effect of allowing the user to immediately check the recording state because the present invention can immediately view and record the video signal on the videotape.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019860020581U KR900002631Y1 (en) | 1986-12-19 | 1986-12-19 | Testing circuit of reproducing state of video cassette recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019860020581U KR900002631Y1 (en) | 1986-12-19 | 1986-12-19 | Testing circuit of reproducing state of video cassette recorder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR880013488U KR880013488U (en) | 1988-08-30 |
| KR900002631Y1 true KR900002631Y1 (en) | 1990-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019860020581U KR900002631Y1 (en) | 1986-12-19 | 1986-12-19 | Testing circuit of reproducing state of video cassette recorder |
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| Country | Link |
|---|---|
| KR (1) | KR900002631Y1 (en) |
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1986
- 1986-12-19 KR KR2019860020581U patent/KR900002631Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR880013488U (en) | 1988-08-30 |
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