KR900003277Y1 - V-lock pulse automatic control circuit - Google Patents
V-lock pulse automatic control circuit Download PDFInfo
- Publication number
- KR900003277Y1 KR900003277Y1 KR2019860012150U KR860012150U KR900003277Y1 KR 900003277 Y1 KR900003277 Y1 KR 900003277Y1 KR 2019860012150 U KR2019860012150 U KR 2019860012150U KR 860012150 U KR860012150 U KR 860012150U KR 900003277 Y1 KR900003277 Y1 KR 900003277Y1
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- signal
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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
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
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- 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
- G11B20/10—Digital recording or reproducing
- G11B20/10009—Improvement or modification of read or write signals
- G11B20/10222—Improvement or modification of read or write signals clock-related aspects, e.g. phase or frequency adjustment or bit synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Multimedia (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
내용 없음.No content.
Description
제1도는 본 고안에 따른 블록도.1 is a block diagram according to the present invention.
제2도는 본 고안에 따른 제1도의 각부 동작 파형도.2 is a waveform diagram of each part of FIG. 1 according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
R1-R3: 저항 C1-C2: 캐패시터R 1 -R 3 : Resistor C 1 -C 2 : Capacitor
EOR : 익스클루시브오아 FF1-FF2: 플리플롭EOR: Exclusive ora FF 1 -FF 2 : Flip-flop
OR1: 오아게이트OR 1 : Oagate
본 고안은 VTR에서 다기능 모드(Mode)시 화면의 동기가 무너짐과 떨림을 방지하기 위한 회로에 관한 것으로, 특히 테이프에 기록되어 있는 합성 비디오 동기신호(Composite Video Sync)에서 수직동기신호를 분리하여 기준 V-록크(Ventical-Lock)펄스와 비교하여 시스템에 따라 달리 기록된 테이프에서 재생시 동기(Sync)신호가 치우칠 경우 이를 자동으로 보상하여 화면이 떨림을 제거할 수 있도록 V-록크 펄스 자동제어 회로에 관한 것이다.The present invention relates to a circuit for preventing the screen from collapsing and shaking in the multi-function mode in the VTR. In particular, the vertical sync signal is separated from the composite video sync signal recorded on the tape. Compared to V-Lock pulse, V-Lock pulse automatic control circuit automatically compensates for the sync signal during playback on tape recorded differently depending on the system so that the screen can be eliminated. It is about.
일반적으로 VTR세트 마다 레코드 특성과 플레이백 특성에 의한 차이점 때문에 테이프 기록시 비디오 신호기록상태가 다르게 된다. 이로 인하여 비디오 신호 상태 즉 수직동기 위치한 V-록크 펄스의 위치가 일치되지 않은 문제점 때문에 화면이 떨림이 심한 결점이 있었다.In general, the video signal recording state is different during tape recording because of differences in recording characteristics and playback characteristics for each VTR set. Due to this, there is a drawback that the screen shakes severely due to the problem that the position of the video signal, that is, the position of the vertically synchronized V-lock pulse, does not match.
따라서 종래의 세트에서 테이프가 VTR 시스템의 종류가 변화할 때마다 화면의 동기가 무너짐 및 떨림을 방지하기 위해 의사(Artifical)수직동기 발생회로를 사용하여 화면동기를 강제적으로 잡아왔었다. 즉 사용자가 직접 서보(Servo)기능에 V-록크 조정용 가변저항을 조정하여 테이프와 세트의 특성을 일치시켜 왔는데 이에 따라 테이프 재생시마다 항상 조정해줘야 하는 불편이 있었으며 또한 양질의 화면을 볼 수 없었다.Therefore, in the conventional set, the screen has been forced by using an artificial vertical synchronization generating circuit in order to prevent the screen synchronization from falling and shaking whenever the type of the VTR system changes. In other words, the user directly adjusted the V-lock adjustment variable resistance to the servo function to match the characteristics of the tape and the set. Therefore, there was a inconvenience to always adjust it every time the tape was played, and the quality screen could not be seen.
따라서 본 고안은 종래의 문제점을 해결하기 위해 V-록크 펄스를 테이프의 기록상태에 따라 자동으로 조정 변화시켜 사용자에 의한 직접 조정의 번거러움을 제거할 수 있는 회로를 제공함에 있다.Accordingly, the present invention provides a circuit capable of eliminating the trouble of direct adjustment by a user by automatically adjusting and changing a V-lock pulse according to a recording state of a tape in order to solve the conventional problem.
본 고안의 다른 목적은 양질의 화면을 항상 재생시킬 수 있는 VTR시스템을 제공함에 있다.Another object of the present invention is to provide a VTR system capable of always reproducing a good quality screen.
따라서 본 고안의 목적을 수행하기 위해 VTR 시스템의 동기 조정회로에 있어서, 테이프로 입력된 합성영상 동기 신호로부터 수직 동기를 분리해내는 제1수단과, 상기 제1수단으로부터 분리된 수직동기신호가 일정한 펄스폭을 갖도록 하여 펄스를 발생하는 제2수단과, 상기 제2수단의 발생펄스의 기존 V-록크신호를 입력하여 위상차에 따른 두 신호를 발생하는 제3수단과, 상기 제3수단의 발생신호와 기준 V-록크신호를 논리합하여 테이프에 따라 다기능시 벗어난 동기를 자동으로 잡아주기 위한 최종 V-록크 펄스신호를 만들어내는 제4수단으로 구성함을 특징으로 한다.Therefore, in order to accomplish the object of the present invention, in the synchronization adjustment circuit of the VTR system, the first means for separating the vertical synchronization from the composite image synchronization signal input to the tape, and the vertical synchronization signal separated from the first means is constant A second means for generating a pulse having a pulse width, a third means for inputting an existing V-lock signal of the generating pulse of the second means, and generating two signals according to a phase difference; and a generating signal of the third means. And a fourth means for generating the final V-lock pulse signal for automatically catching the deviation out of multi-function according to the tape by ORing the reference V-lock signal.
이하 본 고안을 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
제1도는 본 고안에 따른 회로도로서 저항(R1)과 캐패시터(C2)를 병렬로 구성하고 이어서 저항(R2)을 병렬로 접속하여 합성 영상신호로부터 수직동기만 분리해내는 필터기능을 갖는 제1수단(10)과, 단안정 멀티바이브레이터(MMV)에 저항(R3)과 캐패시터(C2)를 접속하여 시정수 조정에 의해 일정한 펄스폭을 갖는 구형파를 발생하도록 하는 제2수단(20)과, 라인(50)으로 입력되는 기존의 V-록크 신호와 상기 제2수단으로부터 분리된 수직동기신호를 익스클루시브오아(EOR)하여 플립플롭(FF1-FF2)에서펄스폭이 같고 위상차가 있는 두신호를 출력하는 제3수단(30)과, 상기 라인(50)의 기존 V-록크신호와 제3수단(30)의 출력을 오아(OR1)하여 최종 V-록크 펄스신호를 만들어 내는 제4수단(40)으로 구성된다.FIG. 1 is a circuit diagram according to the present invention. The resistor R 1 and the capacitor C 2 are configured in parallel, and then the resistor R 2 is connected in parallel to have a filter function for separating vertical synchronization only from a composite video signal. Second means 20 for connecting the resistor R 3 and the capacitor C 2 to the first means 10 and the monostable multivibrator MMV to generate a square wave having a constant pulse width by time constant adjustment. ) And the existing V-lock signal input to the line 50 and the vertical synchronizing signal separated from the second means by exclusive OR (EOR) to have the same pulse width at the flip-flop (FF 1 -FF 2 ). the output of the third means 30 and the existing V- lock signal and third means (30) of the line (50) for outputting the two signals with a phase difference of Iowa (OR 1) in the final locked pulse signal V- The fourth means 40 is produced.
제2도는 본 고안에 다른 제1도의 동작 파형도로 (a)파형은 합성 영상동기 신호로부터 얻어진 지역필터의 출력 전분신호이고, (b)파형은 제1도의 단안정 멀티바이브레이터(MMV)의 출력파형이며, (c)는 기존의 V-록크 신호이고, (d)는 제1도의 익스크루시브오아(EOR)의 출력 파형이고, (e)는 필릅플롭(FF2)의 출력이며, (f)는 플립플롭(FF1)의 출력이고, (g)는 오아(OR1) 게이트의 출력파형이다.2 is an operational waveform diagram of FIG. 1 according to the present invention. (A) The waveform is the output starch signal of the local filter obtained from the synthesized image synchronization signal, and (b) the waveform is the output waveform of the monostable multivibrator (MMV) of FIG. (C) is the existing V-lock signal, (d) is the output waveform of the exclusive ore (EOR) of FIG. 1, (e) is the output of the fill-flop (FF 2 ), and (f) Is the output of the flip-flop (FF 1 ), and (g) is the output waveform of the OR (OR 1 ) gate.
따라서 본 고안의 일실시예를 상술한 도면에 의거하여 구체적으로 기술하면 입력라인(3)을 통해 테이프에 따른 합성영상 동기신호가 입력될 때 저항(R1)과 캐패시터(C1)에 의해 적분되어 제2도(a)와 같이 출력된다.Therefore, when an embodiment of the present invention is described in detail with reference to the above-described drawings, when a composite image synchronizing signal according to a tape is input through the input line 3, it is integrated by a resistor R 1 and a capacitor C 1 . And output as shown in FIG.
이때 이 신호를 바이어스 저항(R2)에 의해 단안정 멀티바이브레타(MMV)에 입력되면 일정한 펄스폭을 갖도록 저항(R3)과 캐패시터(C2)를 시정수로 조정하여 일정한 신호가 제2도의 (b)와 같이 출력된다.At this time, when the signal is input to the monostable multivibrator (MMV) by the bias resistor (R 2 ), the resistor (R 3 ) and the capacitor (C 2 ) are adjusted to the time constant to have a constant pulse width so that the constant signal is the second. It is output as shown in FIG.
이 신호를 익스클루시브오아(EOR)에 입력하고 기존의 V-록크 신호가 제2도(c)와 같이 라인(4)를 통해 역시 익스클루시브오아(EOR)에 입력되면 익스클루시브오아(EOR)는 배타적 논리합이므로 입력논리가 서로 다를 때 "하이"가 되어 두 개의 펄스폭을 갖는 신호가 제2도(d)와 같이 출력된다.When this signal is inputted to the exclusive ore (EOR) and the existing V-lock signal is also input to the exclusive ore (EOR) via the line 4 as shown in FIG. EOR) is an exclusive OR, so when the input logics are different, the signal becomes high and a signal having two pulse widths is output as shown in FIG.
이 신호를 플립플롭(FF2)에 집적 입력하고 또한 플립플롭(FF1)의 반전 버퍼에 의해 소정 지연된 신호가 입력될 때 각출력은 제2도(e)와 (f)와 같이 되어 이 양신호(e, f)와 기존의 V-록크 신호(c)를 오아게이트(OR1)에 입력하면 제2도(g) 파형과 같이 최종 V-록크 펄스신호가 출력되어 비디오게의 V-록크펄스 입력단에 입력된다.When the signal is integrated into the flip-flop FF 2 and the signal delayed by the inverting buffer of the flip-flop FF 1 is inputted, the respective outputs become as shown in Figs. 2E and 2F. When (e, f) and the existing V-lock signal (c) are input to the OR gate (OR 1 ), the final V-lock pulse signal is output as shown in the waveform of FIG. It is entered at the input.
즉 기존 V-록크 신호와 동기가 벗어나더라도 익스클루시브오아하여 이를 보상하므로 안정된 화면을 볼 수 있다.That is, even if the synchronization with the existing V-lock signal is compensated by the exclusive ora, you can see a stable screen.
상술한 바와 같이 테이프에 따라 동기신호가 달리 입력 되더라도 수직동기를 분리하여 일정 펄스폭으로 조정하여 기존 V-록크 신호와 비교하여 자동적으로 동기를 잡아주므로 사용자가 별도로 테이프에 따라 V-록크펄스를 조정할 필요가 없는 편리함과 양질의 화면을 시청할 수 있는 이점이 있다.As described above, even though the synchronization signal is input differently according to the tape, the vertical synchronization is separated and adjusted to a constant pulse width to automatically synchronize with the existing V-lock signal, so the user can adjust the V-lock pulse according to the tape separately. There is no need for convenience and good quality screen.
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Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR2019860012150U KR900003277Y1 (en) | 1986-08-12 | 1986-08-12 | V-lock pulse automatic control circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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KR2019860012150U KR900003277Y1 (en) | 1986-08-12 | 1986-08-12 | V-lock pulse automatic control circuit |
Publications (2)
Publication Number | Publication Date |
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KR880005524U KR880005524U (en) | 1988-05-12 |
KR900003277Y1 true KR900003277Y1 (en) | 1990-04-20 |
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KR2019860012150U Expired KR900003277Y1 (en) | 1986-08-12 | 1986-08-12 | V-lock pulse automatic control circuit |
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KR (1) | KR900003277Y1 (en) |
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1986
- 1986-08-12 KR KR2019860012150U patent/KR900003277Y1/en not_active Expired
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