KR940006964Y1 - Circuit for switching control signal for viss/vass - Google Patents

Circuit for switching control signal for viss/vass Download PDF

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Publication number
KR940006964Y1
KR940006964Y1 KR2019880011989U KR880011989U KR940006964Y1 KR 940006964 Y1 KR940006964 Y1 KR 940006964Y1 KR 2019880011989 U KR2019880011989 U KR 2019880011989U KR 880011989 U KR880011989 U KR 880011989U KR 940006964 Y1 KR940006964 Y1 KR 940006964Y1
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South Korea
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control signal
circuit
signal
operational amplifier
vis
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KR2019880011989U
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Korean (ko)
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KR900003701U (en
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박성백
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주식회사 금성사
최근선
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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
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
    • G11B27/322—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier used signal is digitally coded
    • G11B27/324—Duty cycle modulation of control pulses, e.g. VHS-CTL-coding systems, RAPID-time code, VASS- or VISS-cue signals
    • 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
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/05—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container
    • 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

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  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)

Abstract

내용 없음.No content.

Description

비스/바스(VISS/VASS)용 제어 신호 절환 회로Control signal switching circuit for VIS / VASS

제1도는 본 고안의 비스/바스용 제어신호 절환회로도.1 is a control signal switching circuit for a vise / bath of the present invention.

제2도의 (a)∼(c) 및 (d)∼(f)는 정방향(FF) 및 역방향(REW) 고속주행시 제1도 각부의 신호파형도.(A)-(c) and (d)-(f) of FIG. 2 are the signal waveform diagram of each part of FIG. 1 at the time of high speed driving of forward (FF) and reverse (REW).

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 파형 정형회로부 2 : 콘트롤신호 절환부1 waveform shaping circuit 2 control signal switching unit

CH1: 콘트롤헤드 OP1: 연산증폭기CH 1 : control head OP 1 : operational amplifier

a1: 빨리보내기신호 입력단자 a2: 되감기신호 입력단자a 1 : fast forward signal input terminal a 2 : rewind signal input terminal

Q1~Q3: 트랜지스터 T1: 비디오테이프Q 1 to Q 3 : Transistor T 1 : Video tape

본 고안은 비디오테이프에 기록된 방송 프로그램의 처음 또는 끝을 고속으로 찾기 위한 비스(video Index Search System)/바스(Video Address Search System)용 제어신호의 재생에 관한 것으로, 특히 비디오테이프를 정방향(FF) 또는 역방향(REW) 고속주행시킬 때, 주행방향에 관계없이 비스/바스(VISS/VASS)용 재생제어신호가 동일하도록 그 신호의 듀티비(Duty Ratio)를 제어하는 비스/바스(VISS/VASS)용 제어신호 절환회로에 관한 것이다.The present invention relates to the reproduction of a control signal for a video index search system / bath (Video Address Search System) for quickly searching for the beginning or the end of a broadcast program recorded on a videotape. Vis / VASS that controls the duty ratio of the Vis / VASS so that the playback control signal for the Vis / VASS is the same regardless of the driving direction. Control signal switching circuit.

종래의 비스/바스용 제어신호 재생회로는 콘트롤헤드가 연산증폭기에 직접 접속되어 있었기 때문에 비디오테이프가 정방향 고속주행할 때 상기 연산증폭기의 출력신호파형은 제2도의 (a)와 같고, 비디오테이프의 역방향 고속주행시는 테이프에 기록된 비스/바스용 제어신호가 정방향 고속주행시의 역순으로 재생되므로 상기 연산증폭기의 출력신호파형은 제2도의 (d)와 같아져, 비디오테이프의 주행방향에 따라 각기 다른 비스/바스용재생제어신호가 연산증폭기를 통해 파형정형회로에 입력되고, 이에따라 그 파형 정형회로의 출력신호 듀티비가 정방향 및 역방향 고속주행에 따라 달라지므로 재생제어신호가 정방향 고속주행시와는 다른 코드로 인식된다. 왜냐하면 파형정형회로를 통해 비스/바스용 재생제어신호가 입력되는 마이콤이 그 신호의 듀티비에 의해 그 회로의 코드(Code)를 인식하기 때문이다. 코드는 "O111O" 및 "O1111O"과 같이 'O'사이에 있는 '1'의 갯수에 의해 정해지고, 또한 VHS 비디오 카세트 시스템에서의 표준 제어신호에 있어서, "0"의 신호는 고전위구간이 펄스주기에서 60±5%로 되고, "1"의 신호는 고전위 구간이 펄스주기에서 27.5±2.5%로 되어 있다.In the conventional vis / bath control signal reproducing circuit, since the control head is directly connected to the operational amplifier, the output signal waveform of the operational amplifier when the videotape is driven at high speed in the forward direction is as shown in FIG. In the reverse high speed driving, the vis / bath control signal recorded on the tape is reproduced in the reverse order in the high speed forward driving. Therefore, the output signal waveform of the operational amplifier is as shown in (d) of FIG. The regeneration control signal for the vis / bath is input to the waveform shaping circuit through the operational amplifier, and accordingly, the output signal duty ratio of the waveform shaping circuit varies depending on the forward and reverse high speed driving, so that the regeneration control signal is different from the code of the high speed driving. It is recognized. This is because the microcomputer to which the VSC / BAS regeneration control signal is input through the waveform shaping circuit recognizes the code of the circuit by the duty ratio of the signal. The code is determined by the number of '1's between' O ', such as " O111O " and " O1111O ", and in the standard control signal in the VHS video cassette system, the signal of " 0 " 60 ± 5% in the pulse period, and the signal of “1” has a high potential section of 27.5 ± 2.5% in the pulse period.

따라서 비디오테이프의 역방향 고속주행시에는 브이씨알이 비스/바스 기능을 수행할 수 없는 결점이 있었다.Therefore, VRT was unable to perform the vis / bath function in the reverse high speed driving of the video tape.

본 고안은 이와같은 종래의 결점을 해결하기 위하여, 비디오테이프의 정방향 주행시에는 연산증폭기에서 출력되는 제어신호가 그대로 파형 정형회로에 입력되고, 역방향 고속주행시에는 연산증폭기에서 출력되는 제어신호가 반전된 후 파형 정형회로에 입력되게 하여, 정방향 및 역방향 고속주행시에 동일한 듀티비를 갖는 비스/바스용 제어신호가 파형 정형회로에 입력되게 함으로써 역방향 고속주행시에도 브이씨알이 비스/바스기능을 수행할 수 있도록 안출한 것으로, 이를 첨부한 도면에 의하여 상세히 설명하면 다음과 같다.In order to solve the above-mentioned shortcomings, the present invention, in the forward driving of the video tape, the control signal output from the operational amplifier is input to the waveform shaping circuit as it is, and in the reverse high-speed driving, the control signal output from the operational amplifier is reversed. By inputting to the waveform shaping circuit, the VSC / BAS control signal having the same duty ratio is input to the waveform shaping circuit in the forward and reverse high speed driving so that V-AL can perform the vis / bath function even in the reverse high speed driving. If it is described in detail by the accompanying drawings as follows.

제1도는 본 고안의 비스/바스용 제어신호 절환회로도로서 이에 도시한 바와같이, 콘트롤헤드(CH1) 및 연산증폭기(OP1)로 구성된 종래의 재생회로 출력측, 즉 상기 연산증폭기(OP1)의 출력측을 콘트롤신호 절환부(2)의 트랜지스터(Q1) 에미터측에 접속함과 아울러 그 출력측을 개패시터(C1)를 통해 트랜지스터(Q3)의 베이스측에 접속하며, 상기 연산증폭기(OP1)의 출력측을 저항(R1)을 통해 트랜지스터(Q1)의 베이스 및 트랜지스터(Q2)의 콜렉터에 접속하여, 그 트랜지스터(Q2)의 베이스에 빨리보내기(FF)신호 입력단자(a1)를 접속하고, 상기 트랜지스터(Q3)의 콜렉터측에 다이오드(D1) 및 저항(R2)을 통해 되감기(REW)신호 입력단자(a2)를 접속함과 아울러 저항(R3)을 다시 통해 그의 베이스에 접속하며, 상기 트랜지스터(Q1),(Q3)의 콜렉터를 파형 정형회로부(1)의 입력측에 공통 접속하여 구성한 것으로, 테이프(T1)의 정방향 고속주행시 빨리보내기신호 입력단자(a1) 및 되감기신호 입력단자(a2)에는 고전위신호 및 저전위신호가 각각 인가되고, 반대로 역방향 고속주행시 빨리보내기신호 입력단자(a1) 및 되감기신호 입력단자(a2)에는 저전위신호 및 고전위신호가 각기 인가되게 구성되어 있다. 이와같이 구성한 본 고안의 동작 및 효과를 상세히 설명하면 다음과 같다.1 is a vis / bath control signal switching circuit diagram of the present invention, as shown therein, a conventional reproduction circuit output side composed of a control head CH 1 and an operational amplifier OP 1 , that is, the operational amplifier OP 1 . The output side of the control signal switching unit 2 is connected to the transistor Q 1 emitter side, and the output side thereof is connected to the base side of the transistor Q 3 through the capacitor C 1 , and the operational amplifier ( OP 1) connected to a collector of a base and a transistor (Q 2) of the transistor (Q 1) via a resistor (R 1) to the output side, the sending fast to the base of the transistor (Q 2) (FF) signal input terminal of the ( a 1 ) is connected, and a rewind (REW) signal input terminal a 2 is connected to the collector side of the transistor Q 3 through a diode D 1 and a resistor R 2 and a resistor R 3. ) through the back and connected to its base, the waveform of the collector of the transistor (Q 1), (Q 3 ) information It is constituted by a common connection to the input side of the circuit (1), a tape fast forward signal input terminal when driving forward high-speed (T 1) (a 1) and a reverse signal input terminal (a 2) have each a high potential signal and the low potential signal On the contrary, the low potential signal and the high potential signal are respectively applied to the fast forward signal input terminal a 1 and the rewind signal input terminal a 2 during reverse fast driving. Referring to the operation and effects of the present invention configured in this way in detail as follows.

비디오테이프(T1)의 정방향 고속주행시 콘트롤신호 절환부(2)의 빨리보내기, 되감기신호 입력단자(a1),(a2)에 각각 고전위신호 및 저전위신호가 입력되므로, 트랜지스터(Q2)가 도통되어 트랜지스터(Q1)가 도통되고, 트랜지스터(Q3)는 오프된다. 따라서 콘트롤헤드(CH1)에서 재생된 제2도의 (a)에 도시한 바와같은 비스/바스용 제어신호는 연산증폭기(OP1)를 통하고, 콘트롤신호 절환부(2)의 트랜지스터(Q1)를 곧바로 통해 파형 정형회로부(1)에 입력된 후 파형 정형화되어 마이콤으로 출력되며, 이때 상기 트랜지스터(Q1)의 콜렉터 및 상기파형 정형부(1)의 출력신호 파형은 제2도의 (b) 및 (c)와 같이 된다.Since the high potential signal and the low potential signal are respectively input to the fast forward and rewind signal input terminals a 1 and a 2 of the control signal switching unit 2 in the forward high speed driving of the video tape T 1 , the transistor Q 2 ) is turned on, transistor Q 1 is turned on, and transistor Q 3 is turned off. Therefore, the vis / bath control signal as shown in (a) of FIG. 2 reproduced by the control head CH 1 passes through the operational amplifier OP 1 and the transistor Q 1 of the control signal switching unit 2. ) Is inputted directly to the waveform shaping circuit unit 1, and then waveform shaping is output to the microcomputer, where the collector of the transistor Q 1 and the output signal waveform of the waveform shaping unit 1 are shown in FIG. And (c).

그러나, 비디오테이프(T1)가 역방향 고속주행하면, 비스/바스용 제어신호가 정방향 고속주행시와는 역순으로 콘트롤헤드(CH1)에 의해 재생되지만, 빨리보내기, 되감기신호 입력단자(a1),(a2)에 각각 저전위신호 및 고전위가 입력되어, 콘트롤신호 절환부(2)의 트랜지스터(Q1, Q2)는 오프되고, 트랜지스터(Q3)는 도통된다. 따라서 제2도의 (d)에 도시한 바와같이 역순으로 재생되어 연산증폭기(OP1)를 통해 출력되는 비스/바스용 제어신호는 상기 트랜지스터(Q3)의 베이스에 인가되어 인버팅(Inverting)되므로 그의 콜렉터측에서 제2도의 (e)와같은 신호가 출력되며, 이 신호는 파형 정형회로부(1)에 입력되어 제2도의 (f)와 같은 신호로 정형화 되어 마이콤에 입력된다. 따라서 비디오테이프(T1)의 역방향 고속주행시도 정방향 고속주행시와 동일한 듀티비를 갖는 즉, 동일한 코드의 비스/바스용 제어신호가 파형 정형회로부(1)에서 출력되는 결과로 된다.However, when the video tape T 1 is driven in reverse high speed, the control signal for the vis / bath is reproduced by the control head CH 1 in the reverse order as in the case of the forward high speed driving, but the fast forward and rewind signal input terminal a 1 is performed. The low potential signal and the high potential are input to (a 2 ), respectively, so that the transistors Q 1 and Q 2 of the control signal switching unit 2 are turned off and the transistor Q 3 is turned on. Therefore, as shown in (d) of FIG. 2, the vis / bath control signal reproduced in the reverse order and output through the operational amplifier OP 1 is applied to the base of the transistor Q 3 and inverted. On the collector side thereof, a signal as shown in (e) of FIG. 2 is outputted, and this signal is inputted to the waveform shaping circuit unit 1, shaped into a signal as shown in FIG. Therefore, the reverse high-speed driving of the video tape T 1 has the same duty ratio as that of the high-speed driving of the forward direction, that is, the control signal for the vise / bath of the same code is output from the waveform shaping circuit unit 1.

이상의 설명과 같이 본 고안은 테이프의 정방향 또는 역방향 고속 주행에 관계없이 콘트롤신호를 동일 듀티비로 검출하게 되어 브이씨알이 비스/바스 기능을 하게 되므로 테이프에 기록된 방송 프로그램의 시작 및 끝을 빠른 시간에 찾을 수 있는 효과가 있게 된다.As described above, the present invention detects the control signal at the same duty ratio regardless of the forward or reverse high-speed driving of the tape, so that V-Ral functions as a vis / bas, so that the start and end of the broadcast program recorded on the tape can be quickly achieved. There is an effect that can be found.

Claims (1)

브이씨알의 제어신호 재생회로에 있어서, 콘트롤신호를 테이프에서 재생하는 콘트롤헤드와, 상기 콘트롤헤드에서 재생 출력되는 콘트롤신호를 증폭하는 연산증폭기와, 상기 연산증폭기에서 출력되는 콘트롤신호를 정방향 고속주행 또는 역방향 고속주행에 따라 그대로 또는 반전하여 출력하는 콘트롤신호 절환부와, 상기 콘트롤 절환부에서 출력되는 콘트롤신호의 파형을 정형화하여 마이콤에 입력시키는 파형 정형회로부로 구성하여 된 것을 특징으로 하는 비스/바스(VISS/VASS)용 제어신호 절환회로.A control signal reproducing circuit of V-Cal, comprising: a control head for reproducing a control signal on a tape; an operational amplifier for amplifying a control signal reproduced and output from the control head; and a control signal output from the operational amplifier in a forward high-speed driving or Vis / Bass, characterized in that the control signal switching unit for outputting as it is or inverted in accordance with the reverse high-speed driving, and the waveform shaping circuit unit for shaping the waveform of the control signal output from the control switching unit to be input to the microcomputer ( Control signal switching circuit for VISS / VASS).
KR2019880011989U 1988-07-25 1988-07-25 Circuit for switching control signal for viss/vass KR940006964Y1 (en)

Priority Applications (1)

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KR2019880011989U KR940006964Y1 (en) 1988-07-25 1988-07-25 Circuit for switching control signal for viss/vass

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Application Number Priority Date Filing Date Title
KR2019880011989U KR940006964Y1 (en) 1988-07-25 1988-07-25 Circuit for switching control signal for viss/vass

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KR900003701U KR900003701U (en) 1990-02-08
KR940006964Y1 true KR940006964Y1 (en) 1994-10-07

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KR900003701U (en) 1990-02-08

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