KR870001589Y1 - Fine still circuit of video tape recorder - Google Patents
Fine still circuit of video tape recorder Download PDFInfo
- Publication number
- KR870001589Y1 KR870001589Y1 KR2019840014015U KR840014015U KR870001589Y1 KR 870001589 Y1 KR870001589 Y1 KR 870001589Y1 KR 2019840014015 U KR2019840014015 U KR 2019840014015U KR 840014015 U KR840014015 U KR 840014015U KR 870001589 Y1 KR870001589 Y1 KR 870001589Y1
- Authority
- KR
- South Korea
- Prior art keywords
- amplifier
- fine
- output
- vtr
- operational amplifier
- Prior art date
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Classifications
-
- 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
- G11B20/02—Analogue recording or reproducing
-
- 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
- G11B15/22—Stopping means
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/78—Television signal recording using magnetic recording
- H04N5/782—Television signal recording using magnetic recording on tape
- H04N5/783—Adaptations for reproducing at a rate different from the recording rate
Abstract
내용 없음.No content.
Description
제1도는 본 고안의 회로 계통도.1 is a circuit diagram of the present invention.
제2도의 본 고안의 각부파형도.Fig. 2 shows the angle waveform of the present invention.
제3(a)도는 종래의 화면정지시 헤드의 궤적과 이의 검출파형 및 화면상 태도.3 (a) shows the trajectory of the head during the screen freeze, its detected waveform and the attitude on the screen.
제3(b)도는 본 고안의 화인스틸 헤드의 궤적과 이의 걸출파형 및 화면의 상태도.Figure 3 (b) is a trajectory of the fine steel head of the present invention and its outstanding waveform and state of the screen.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
Fs : 화인스로우버튼 1 : 펄스발생시기Fs: Fine low button 1: Pulse occurrence time
2 : 모노멀티 SW: 전자스위치2: mono-multi SW: electronic switch
3 : 앰프 4 : 앰프3: amplifier 4: amplifier
5 : 정류기 6 : 연산증폭기5: rectifier 6: operational amplifier
본 고안은 VTR의 정지화면 재생, 특히 스로우 화인스로우동시 깨끗한 화면을 얻도록한 화인스틸 회로에 관한 것이다. 종래에는 VTR의 스틸모드시에 제3(a)도와 같이 화면의 노이즈바가 나타나거나 안나타나더라도 프레임스틸의 경우는 노이즈가 적은 RF를 찾기 위하여 3내지 4프레임을 간헐적으로 움직였다가 정지하므로서 보는 사람으로 하여금 심리적 불안감이나 불편한 마음을 느끼게 하였다. 즉, 여기서 간헐적이란 정지→재생→정지→재생의 반복으로 화인스로우동작이라 부르기도 하는 것이며, 이는 이 동작중 헤드(HD)가 A 및 B트랙을 궤적할때 인접트랙에까지 트레이스하여 RF파형의 검출이 불명확하게 되고 이에따라 모니터의 중앙점에 이르기까지 노이즈바가 나타나는 것이었다.The present invention relates to a still-steel playback of a VTR still picture playback, in particular to a clean picture at the same time through a slow fine. Conventionally, even when the noise bars on the screen appear or do not appear in the still mode of the VTR as shown in Fig. 3 (a), in the case of frame steel, the viewer is moved by intermittently moving 3 to 4 frames in order to find a low noise RF. It made me feel psychological anxiety or discomfort. In other words, the intermittent operation is sometimes referred to as the fine-low operation by stopping, replaying, stopping, and replaying, which is detected when the head HD tracks the A and B tracks to the adjacent track to detect the RF waveform. This became unclear and accordingly a noise bar appeared up to the center point of the monitor.
본 고안은 종래의 VTR 화인스로우작중에서 노이즈가 없는 화면을 얻기 위해 불편한 동작을 자주해야 되면서도 심리적 불안감을 느끼게 되는 문제점을 해소하고 안출한 것인데, 이는 화인스토로우버튼을 누르자마자 그대로 화인스틸화면을 얻도록한 회로를 제공할 목적이 있는 것이다. 이하에서 이를 상세히 설명하면 다음과 같다.The present invention solves the problem of feeling psychological anxiety while frequently performing an uncomfortable operation in order to obtain a noise-free screen in the conventional VTR fine-low operation, which is obtained as soon as pressing the FineStraw button. The purpose is to provide a circuit that can be used. This will be described in detail below.
화인스로우버튼(Fs)에서 펄스발생기(1)를 연결하고 이에 완쇼트(one shot)형 모노멀티(2)를 연결하며, 모노멀티(2)출력이 전자스위치(SW)를 제어하도록 구성한다. 또, RF신호를 검출하는 헤드(HD)에 로터리트랜스(TS)를 거쳐 앰프(3)를 연결하고, 이의 출력은 복합영상신호계통인 휘도, 칼라신호계통(Y/C)과 랙프(4)에 연결된다. 상기 앰프(4)출력은 정류기(5)를 거쳐 연산증폭기(6)의 일단의 입력으로 제공되고, 이의 타단엔 신호의 최대전압파형을 기준전압으로 한 레퍼런스 전압(REF)이 가해진다. 또, 이연산증폭기(6)의 전원 공원공급단(3)엔 전자스위치(SW) 일단이 연결되고, 이의 출력(L)이 캡스턴모터 드라이브단(7)으로 연결되는 구성을 가진다.The pulse generator (1) is connected to the fine low button (Fs) and the one-shot monomulti (2) is connected thereto, and the mono multi (2) output is configured to control the electronic switch (SW). In addition, the amplifier (3) is connected to the head (HD) for detecting the RF signal through a rotary transformer (TS), and the output thereof is the luminance, color signal system (Y / C) and the rack (4), which are complex video signal systems. Is connected to. The output of the amplifier 4 is provided to the input of one end of the operational amplifier 6 via the rectifier 5, and the other end thereof is applied with a reference voltage REF with the maximum voltage waveform of the signal as the reference voltage. In addition, one end of the electronic switch SW is connected to the power supply park supply terminal 3 of the discrete operation amplifier 6, and the output L thereof is connected to the capstan motor drive terminal 7.
미설명부호 Vcc는 전원, 제3도의 Hp는 헤드스위칭펄스이다.Reference numeral Vcc denotes a power supply and Hp in FIG. 3 denotes a head switching pulse.
이러한 구성의 본 고안은 재생모드로 VTR화면을 보다가 정지화면을 간헐적으로 보이기 위해서 화인스로우버튼(FS)을 1회 누르면 릴모터와 캡스턴모터는 정지하게 되고, 상기버튼(FS)의 누름과 함께 펄스발생기(1)에서 제2(a)도와 같이 펄스를 발생시킨다. 이 펄스는 모노멀티(2)를 거쳐 제2(b)도와 같이 소정의 펄스폭으로 조정되면서 전자스위치(SW)일단을 제어하여 연산증폭기(6)에 전원(Vcc)을 가한다. 한편, 이와 동시에 연산증폭기(6)의 일단의 비반적 입력엔 스틸동작시 최대의 RF값으로 세팅되어 있다. 또, 헤드(HD)로부터 검출된 RF파형은 로터리트랜스(TS), 증폭기(3)를 거쳐 휘도, 칼라신호재생계(Y/C)로 입력되는 한편 또다른 앰프(4)를 거쳐 정류기(5)에 가해져서 소정의 직류레벨의 전압치로 연산증폭기(6)의 타단으로 가해진다.According to the present invention of the above configuration, the reel motor and the capstan motor are stopped by pressing the fine-low button FS once to see the still picture intermittently while viewing the VTR screen in the playback mode. The pulse generator 1 generates pulses as shown in FIG. 2 (a). This pulse is adjusted to a predetermined pulse width as shown in FIG. 2 (b) via the monomulti 2 to control one end of the electronic switch SW to apply a power supply Vcc to the operational amplifier 6. On the other hand, at the same time, the inverse input of one end of the operational amplifier 6 is set to the maximum RF value during the still operation. In addition, the RF waveform detected from the head HD is input to the luminance and color signal reproducing system Y / C via the rotary transformer TS and the amplifier 3 while the rectifier 5 is passed through another amplifier 4. ) Is applied to the other end of the operational amplifier 6 at a voltage value of a predetermined DC level.
따라서, 화인스로우버튼(FS)을 누르는 순간 발생된 펄스에 의해 전자스위치(SW)를 언시시켜서, 연산증폭기(6)를 동작상태로 한 때에, RF 파형이 최대치가 못되면(이때는 노이즈가 있을때이다). 기준전압이 RF파형을 정류한 값보다 크므로 연산증폭기(6) 출력은 논리 "H"가 되고, 이는 제2(c)도와 같은 파형이 캡스턴모터드라이브단(7)을 구동시켜 모터를 회전시키며, 헤드(HD)로부터의 재생 RF값이 세팅된 기준전압보다 같거나 크게 될때는(이때는 노이즈가 없을 때이다.) 연산증폭기(6) 출력이 논리 "H"에서 "L"로 되므로 캡스턴 모터가 정지하게 된다. 이러한 상태는 제3(b)도와 같이 헤드궤적이 A트랙 및 B트랙만 궤적하게 되므로서 RF파형이 정확히 얻어지고 모니터상에는 노이즈바가 제거된 상태로 나타나는 것이다.Therefore, when the electronic amplifier SW is turned on by the pulse generated at the moment of pressing the fine-low button FS, and the operational amplifier 6 is operated, the RF waveform does not reach the maximum value (in this case, there is noise. ). Since the reference voltage is greater than the value of rectifying the RF waveform, the output of the operational amplifier 6 becomes a logic "H", which is a waveform like the second (c) driving the capstan motor drive stage 7 to rotate the motor. When the regenerative RF value from the head HD becomes equal to or greater than the set reference voltage (in this case, there is no noise), the output of the operational amplifier 6 is changed from logic "H" to "L" so that the capstan motor Will stop. In this state, as shown in FIG. 3 (b), since the head tracks only tracks A and B, the RF waveform is accurately obtained and the noise bar is removed on the monitor.
이러한 본 고안은 VTR의 화인스로우동작을 단 한번의 버튼조작과 동시에 노이즈바가 없는 깨끗하고, 명확한 화면을 얻게되어 종래에서와 같이 제3, 제4수조작이 필요없어 편리하며 이에따른 신뢰감을 얻게되는 유익한 특징이 있는 것이다.The present invention achieves a clean, clear screen without noise bars at the same time as a single button operation of the VTR's fine-low operation. It is a beneficial feature.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019840014015U KR870001589Y1 (en) | 1984-12-26 | 1984-12-26 | Fine still circuit of video tape recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019840014015U KR870001589Y1 (en) | 1984-12-26 | 1984-12-26 | Fine still circuit of video tape recorder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR860008701U KR860008701U (en) | 1986-07-28 |
| KR870001589Y1 true KR870001589Y1 (en) | 1987-04-22 |
Family
ID=70163246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019840014015U KR870001589Y1 (en) | 1984-12-26 | 1984-12-26 | Fine still circuit of video tape recorder |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR870001589Y1 (en) |
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1984
- 1984-12-26 KR KR2019840014015U patent/KR870001589Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR860008701U (en) | 1986-07-28 |
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