KR900006487Y1 - Picture noise eliminate circuit of still picture - Google Patents
Picture noise eliminate circuit of still picture Download PDFInfo
- Publication number
- KR900006487Y1 KR900006487Y1 KR2019860019300U KR860019300U KR900006487Y1 KR 900006487 Y1 KR900006487 Y1 KR 900006487Y1 KR 2019860019300 U KR2019860019300 U KR 2019860019300U KR 860019300 U KR860019300 U KR 860019300U KR 900006487 Y1 KR900006487 Y1 KR 900006487Y1
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- South Korea
- Prior art keywords
- screen
- noise
- picture
- output
- circuit
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/911—Television signal processing therefor for the suppression of noise
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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
- G11B15/26—Driving record carriers by members acting directly or indirectly thereon
- G11B15/28—Driving record carriers by members acting directly or indirectly thereon through rollers driving by frictional contact with the record carrier, e.g. capstan; Multiple arrangements of capstans or drums coupled to means for controlling the speed of the drive; Multiple capstan systems alternately engageable with record carrier to provide reversal
-
- 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
-
- 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)
- Multimedia (AREA)
- Signal Processing (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
내용 없음.No content.
Description
제1도는 본 고안에 따른 회로도.1 is a circuit diagram according to the present invention.
제2도는 본 고안에 따른 각부의 파형도.2 is a waveform diagram of each part according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
1 : 시스콘 2 : 펄스발생부1: sheath cone 2: pulse generator
3 : 파형정형부 4 : 모터구동집적회로3: waveform shaping part 4: motor driving integrated circuit
M : 캠스턴모터 SW : 잡음제거용 스위치M: Camston motor SW: Noise canceling switch
[산업상의 이용분야][Industrial use]
본 고안은 영상기록재생장치의 정지화면시 영상잡음제거회로에 관한 것으로, 특히 영상기록재생장치를 화면 정지 모우드로 작동시키는 경우에 발생되는 잡음을 제거하여 선명한 화상을 얻을 수 있도록 화면상에 잡음이 발생할때만 잡음제거용 회로를 동작시켜 짧은 시간동안 캡스턴모터를 구동시켜 줌으로써 선명한 화상을 재생시킬 수 있도록 된 영상기록재생장치의 정지화면시 영상잡음제거회로에 관한 것이다.The present invention relates to a video noise canceling circuit for a still image of a video recording / reproducing apparatus. In particular, a noise on the screen can be removed to obtain a clear image by removing noise generated when the video recording / reproducing apparatus is operated as a still image mode. The present invention relates to an image noise canceling circuit for a still image of a video recording and reproducing apparatus which operates a noise canceling circuit only when it occurs to drive a capstan motor for a short time.
[종래의 기술과 그 문제점]Conventional Technology and Its Problems
종래에는 영상기록 재생장치를 화면정지 모우드로 동작시키는 경우에 발생되는 잡음을 제거하여 화면상에서 선명한 화상을 재생시키기 위해 화면정지용 IC를 사용하고 있는바, 이러한 회로구성에서는 화면정지 모우드에서의 동작시 화면상에 잡음이 출력되지 않는 상태에서 화면을 정지시키기 위해서는 그 화면정지용 IC에 엔벨로프와 D.O.C펄스가 각각 입력되도록 한 다음 그출력단에서는 모터를 구동시켜줄 수 있는 펄스가 출력되어 모터를 구동시켜 주게 되므로써 화면상에 잡음이 출력되지 않는 위치에서 화면을 정지시켜 주도록 되어 있다.Conventionally, a screen stop IC is used to remove a noise generated when the video recording and playback apparatus is operated as a screen stop mode to reproduce a clear image on the screen. In such a circuit configuration, a screen during operation in the screen stop mode is used. To stop the screen when no noise is output on the screen, the envelope and DOC pulses are input to the screen stop IC, and the output terminal outputs a pulse to drive the motor to drive the motor. The screen stops at a location where no noise is output.
그러나, 현재 사용되고 있는 메인 IC에서는 D.O.C펄스가 출력되고 있지 않기 때문에 고가의 화면정지전용 IC를 사용하는 효과를 충분히 발휘하고 있지 못한 상태로 되어 화면 정지모우드에서 영상기록재생장치를 동작시키는 경우 아직도 잡음을 충분히 제거하지 못하게 된다는 문제가 있었다.However, since the DOC pulse is not output from the main IC currently used, the effect of using an expensive IC for exclusive use of screen freeze is not fully exerted, and noise is still generated when the video recording / reproducing device is operated in the freeze mode. There was a problem that it could not be removed sufficiently.
[고안의 목적][Purpose of designation]
본 고안은 상기한 점을 감안해서 고안된 것으로, 간이 정지모우드(random still mode : 화면 정지신호가 입력 되자마자 캡스턴이 그대로 정지한 상태이기 때문에 화면에 잡음이 발생될 수도 있고 발생되지 않을 수도 있음)을 설계해준 다음 화면상에 잡음이 발생하게 될때 잡음제거용 회로를 동작시켜 짧은 시간동안만 캡스턴모터를 구동시켜 줌으로써 화면상에 출력되는 잡음을 제거할 수 있도록 된 영상기록 재생장치의 정지화면시 영상잡음 제거회로를 제공하고자 함에 그 목적이 있다.The present invention was devised in consideration of the above-mentioned point, and a simple still mode (random still mode) may be generated or may not generate noise on the screen since the capstan is still stopped as soon as the screen stop signal is input. After the design, when the noise occurs on the screen, the noise reduction circuit is operated to drive the capstan motor only for a short time to remove the noise output on the screen. The purpose is to provide a removal circuit.
[고안의 구성][Composition of design]
상기한 목적을 달성하기 위해 본 고안은, 화면정지모우드시 하이레벨신호가 출력되는 시스콘(1)의 출력단(ST)에 잡음제거용 스위치(SW)를 매개로 콘덴서(C1)와 저항(R2,R3)으로 이루어진 펄스발생부(2)와 오동작방지용 저항(R1)이 연결되고, 상기 펄스발생부(2)의 출력단에는 트랜지스터(TR1, TR2)와 저항(R4,R5)으로 이루어진 파형정형부(3)와 다이오드(D1)및 모터구동집적회로(4)를 차례로 매개하여 캡스턴모터(M)가 연결된 구조로 되어 있다.In order to achieve the above object, the present invention provides a capacitor (C1) and a resistor (R2) via a noise removing switch (SW) at an output terminal (ST) of the scissor (1) to which a high level signal is output during a screen stop mode. And a pulse generator 2 consisting of R3 and a resistor R1 for preventing malfunction, and a waveform shaping part including transistors TR1 and TR2 and resistors R4 and R5 at an output terminal of the pulse generator 2. (3) and the diode D1 and the motor drive integrated circuit 4 in this order, the capstan motor M is connected.
(실시예)(Example)
이하, 본 고안에 따른 1실시예를 예시도면을 참조하여 상세히 설명한다.Hereinafter, one embodiment according to the present invention will be described in detail with reference to the accompanying drawings.
제1도는 본 고안에 따른 회로도를 나타낸 도면이고, 제2도는 제1도에 도시된 회로의 각 부에서 발생되는 파형도로서, 영상기록 재생장치의 재생동작중 화면정지키(도시되지 않았음)를 누르게 되면, 시스템 콘트롤러인 시스콘(1)의 출력단(ST)으로 부터 하이레벨의 신호가 출력되고, 이때 화면상의 정지화상에 잡음이 포함되어 있는 경우, 그 잡음을 제거하기 위해 잡음제거용 스위치(SW)를 눌러주게 되면, 상기 스위치(SW)가 눌려져 접속되어 있는 동안 상기 스위치(SW)를 통해 제2도의 a와 같은 파형이 출력된다.(여기서 설명의 편의상 제1도에 도시된 각 지점<a-e>의 파형을 동일 기호를 사용하여 제2도에 도시하였음). 이러한 파형을 갖는 신호는 펄스발생부(2)에 있는 콘덴서(C1)와 저항(R2,R3)에 의해 제2도의 b와 같은 파형의 펄스로 출력되고, 이에 따라 상기 b펄스가 존재하는 동안 파형정형부(3)의 트랜지스터(TR1)가 동작해서 턴온됨으로써 c지점의 전하가 로우레벨로 된다.FIG. 1 is a diagram showing a circuit diagram according to the present invention, and FIG. 2 is a waveform diagram generated by each part of the circuit shown in FIG. 1, and shows a screen freeze key (not shown) during a playback operation of an image recording and reproducing apparatus. When is pressed, a high level signal is output from the output stage ST of the system controller 1, which is a system controller. When noise is included in the still image on the screen, a noise canceling switch is removed to remove the noise. When (SW) is pressed, a waveform such as a in FIG. 2 is output through the switch SW while the switch SW is pressed and connected. (Each point shown in FIG. 1 for convenience of description. The waveform of <ae> is shown in FIG. 2 using the same symbols). The signal having such a waveform is outputted by the capacitor C1 and the resistors R2 and R3 in the pulse generator 2 as a pulse having a waveform as shown in FIG. 2, and thus the waveform while the b pulse is present. The transistor TR1 of the shaping section 3 is operated and turned on, so that the charge at the point c becomes low level.
이때 트랜지스터(TR2)는 저항(R4,R5)에 의해 형성되는 바이어스전압에 의해 턴온되게 되므로 d지점에서는 제2도의 d파형과 같이 Vcc레벨을 갖는 구형파전압으로 출력되고, 이러한 구형파전압이 파형정형부(3)로 부터 다이오드(D1)를 통해 모터구동 집적회로(4)에 인가됨에 따라 모터구동 집적회로(4)는 구형파전압이 입력되는 시간동안만 그 출력단에 연결된 캡스턴모터(M)를 구동시켜 주게 된다.At this time, since the transistor TR2 is turned on by the bias voltage formed by the resistors R4 and R5, at the point d, the transistor TR2 is output as a square wave voltage having a Vcc level like the d waveform of FIG. As the motor driving integrated circuit 4 is applied to the motor driving integrated circuit 4 through the diode D1 from (3), the motor driving integrated circuit 4 drives the capstan motor M connected to the output terminal only during the time when the square wave voltage is inputted. Given.
이때 캡스턴모터(M)가 구동되는 시간은 콘덴서(C1)의 용량에 의해 결정된다.At this time, the time that the capstan motor (M) is driven is determined by the capacity of the capacitor (C1).
[고안의 효과][Effect of design]
상기한 바와 같이 본 고안에 의하면, 화면정지전용 IC를 사용하기 않는 대신 간단한 회로구성을 갖는 간이 정지모우드를 설계해서 화면정지시 잡음이 나타나게 되면 잡음제거용 스위치(SW)를 조작해서 필요한 만큼만 캡스턴모터(M)를 구동시켜 줌으로써 영상잡음을 제거해 줄 수 있기 때문에 고가의 화면정지전용 IC를 사용하지 않고서도 그에 상응하는 효과를 얻을 수 있을 뿐만 아니라 제조원가를 감소시켜 줄 수가 있으면서 전반적으로 회로구성이 간단하게 된다는 장점이 있다.As described above, according to the present invention, instead of using an IC for exclusive use of screen stop, instead of designing a simple stop mode with a simple circuit configuration, when noise occurs during screen freeze, the noise reduction switch (SW) is operated only as much as necessary. By driving (M), the image noise can be eliminated, so that the corresponding effect can be obtained without using an expensive screen freeze IC, and the manufacturing cost can be reduced. It has the advantage of being.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019860019300U KR900006487Y1 (en) | 1986-12-03 | 1986-12-03 | Picture noise eliminate circuit of still picture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019860019300U KR900006487Y1 (en) | 1986-12-03 | 1986-12-03 | Picture noise eliminate circuit of still picture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR880014084U KR880014084U (en) | 1988-08-31 |
| KR900006487Y1 true KR900006487Y1 (en) | 1990-07-26 |
Family
ID=19257663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019860019300U KR900006487Y1 (en) | 1986-12-03 | 1986-12-03 | Picture noise eliminate circuit of still picture |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR900006487Y1 (en) |
-
1986
- 1986-12-03 KR KR2019860019300U patent/KR900006487Y1/en not_active IP Right Cessation
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| Publication number | Publication date |
|---|---|
| KR880014084U (en) | 1988-08-31 |
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