KR940016162A - Video tape playback control signal playback and waveform converter - Google Patents

Video tape playback control signal playback and waveform converter Download PDF

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Publication number
KR940016162A
KR940016162A KR1019920025164A KR920025164A KR940016162A KR 940016162 A KR940016162 A KR 940016162A KR 1019920025164 A KR1019920025164 A KR 1019920025164A KR 920025164 A KR920025164 A KR 920025164A KR 940016162 A KR940016162 A KR 940016162A
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KR
South Korea
Prior art keywords
ctl
signal
ctl signal
reproduction
waveform
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KR1019920025164A
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Korean (ko)
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KR950004553B1 (en
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최준호
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이헌조
주식회사 금성사
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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
    • G11B20/02—Analogue recording or reproducing

Abstract

본 방명의 VISS(VHS INDEX SEARCH SYSTEM)기능을 갖는 VCR 또는 캠코더에서 FF 또는 REW 동작과 같이 인덱스(INDEX)를 고속으로 탐색하는.경우 비디오 테이프에서 재생되는 제어신호(CTL신호)를 정확히 검출하여 이를 파형변환하는 장치에 관한 것이다.In the case of a high-speed search of an index such as an FF or REW operation on a VCR or camcorder with the VISS (VHS INDEX SEARCH SYSTEM) function of the present invention, the control signal (CTL signal) played back on a videotape is detected and A device for converting waveforms.

종래의CTL신호 재생 및 파형 변환장치는 일반 재생모드에서의 CTL신호에 대한 검출과 파형 변환은 에러없이 수행 가능하지만 고속탐색이 요구되는 모드, 즉 FF 또는 REW동작과 같이 200배속(EP기준)의 테이프 주행을 수행하는 경우에는 CTL신호의 재생과 파형 변환이 불안정해지거나 불가능해져서 검출 오동작이 발생되는 문제점이 있다.Conventional CTL signal reproducing and waveform converting apparatus can perform CTL signal detection and waveform conversion without error in normal reproducing mode, but the mode requiring high-speed search, that is, 200 times speed (EP standard) such as FF or REW operation. In the case of performing tape travel, there is a problem that detection malfunction occurs due to unstable or impossible reproduction of the CTL signal and waveform conversion.

본 발명은 재생 CTL신호의 정(+), 부(-)구성 피이크를 검출하는 수단과, 피이크 검출결과에 따라 CTL펄스를 발생시키는 수단과, 일반재생 또는 고속탐색에 대응하여 기존의 파형정형부에 의한 CTL펄스 또는 상기 피이크 검출에 따른 CTL펄스를 선택적으로 출력해주는 수단을 구비하여 고속탐색시의 CTL신호재생 및 파형변환을 정확히 수행할수 있도록한 것으로, VCR, 캠코더의 CTL재생계에 적용한다.The present invention provides a means for detecting positive and negative peaks of a reproduced CTL signal, a means for generating CTL pulses according to the peak detection result, and a conventional waveform shaping unit in response to normal reproduction or high-speed search. Means for selectively outputting CTL pulses or CTL pulses according to the peak detection to accurately perform CTL signal reproduction and waveform conversion during high-speed search, and is applied to CTL reproducing systems of VCRs and camcorders.

Description

비디오 테이프의 재생 제어신호 재생 및 파형 변환장치Video tape playback control signal playback and waveform converter

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제 8 도는 본 발명의 비디오 테이프의 재생 제어신호 재생 및 파형 변환장치 블록구성도, 제 9 도는 본 발명 장치의 실시예 회로도.8 is a block diagram of a playback control signal reproduction and waveform conversion device of a video tape of the present invention, and FIG.

Claims (2)

비디오 테이프(11)에 기록된 CTL신호를 재생하는 CTL헤드(12)와, 재생된 CTL신호를 증폭하는 증폭수단(3)과, 증폭된 CTL신호를 일반 재생(주행)모드에서 CTL펄스로 파형변환수단(14)과, 상기 증폭CTL신호의 정(+)성분에서 피이크점을 검출하는 정(+)피이크검출수단(15)과, 상기 증폭 CTL신호를 반전시키는 반전수단(16)과, 상기 반전된 CTL신호의 정(+)성분에서 피이크점을 검출하여 원 CTL신호의 부(-)피이크점을 검출하는 부(-)피이크 검출수단(17)과, 상기 각 피이크 검출수단(15)(17)의 피이크 검출 타임에서 하이 및 로우로 변화되는 CTL펄스를 출력하는 플립플롭(18)과, 상기 플립플롭(18)의 출력 CTL펄스를 미분하여 각각 피이크 검출수단(15)(17)을 CTL 1주기로 리세트시키는 미분수단(19)(20)과, 주행모드에 따라 상기 파형변환수단(14) 또는 상기 플립플롭(18)의 출력을 최종 CTL펄스로 선택하여 출력하는 출력 스위칭수단(21)으로 구성된 비디오 테이프의 재생 제어신호 재생 및 파형 변환장치.A CTL head 12 for reproducing the CTL signal recorded on the video tape 11, an amplifying means 3 for amplifying the reproduced CTL signal, and amplified CTL signal in a CTL pulse in a normal reproduction (driving) mode. A converting means 14, a positive peak detecting means 15 for detecting a peak point in a positive component of the amplified CTL signal, an inverting means 16 for inverting the amplified CTL signal, Negative peak detection means (17) for detecting a peak point of the positive (+) component of the inverted CTL signal and detecting a negative peak point of the original CTL signal, and the respective peak detection means (15) ( The flip-flop 18 which outputs the CTL pulse which is changed to high and low at the peak detection time of 17) and the output CTL pulse of the flip-flop 18 are differentiated to obtain the peak detecting means 15 and 17 respectively. Differential means (19) and (20) for resetting in one cycle, and the output of the waveform converting means (14) or the flip-flop (18) according to the driving mode to the final CTL. Throw selected by the output of a tape consisting of the output switching unit 21 and the reproduction control signal reproduction waveform converting apparatus. 제 1 항에 있어서, 상기 증폭수단(13)을 입력 CTL신호의 잡음을 제거하는 저항(R1)및 콘덴서 (C1)(C2)와, 잡음제거된 CTL신호를 증폭하는 연산증폭기(A1)및 그 이득설정을 위한 저항(R3)(R4) 및 콘덴서(C3)와, 상기 연산증폭기(A1)의 바이어스 분압저항(R5)(R6)으로 구성되고, 상기 파형변환수단(14)은 입력 CTL신호의 비교기(A2) 및 그 비교기준전압 설정저항(R7)(R8)으로 구성되고, 상기 정(+)피이크 검출수단(15)은, 입력 CTL신호의 비교기(A3)와, 입력 CTL신호의 (+)주기 검파다이오드(D1)와, 검파된 CTL신호의 레벨홀딩을 위한 콘덴서(C5)와, 상기 콘덴서(C5)의 방전제어를 수행하는 트랜지스터(Q1)로 구성되고, 상기 반전수단(16)은 연산증폭기(A5)로 구성되고, 상기 부(-)피이크 검출수단(17)은, 입력 CTL신호의 비교기(A4)와, 반전된 입력 CTL신호의 (+)주기 검파다이오드(D2)와, 검파된 CTL신호의 레벨홀딩을 위한 콘덴서(C6)와, 상기 콘덴서(C6)의 방전제어를 수행하는 트랜지스터(Q2)로 구성되고, 상기 미분수단(19)은 피이드백되는 반전 CTL펄스를 미분처리하는 콘덴서(C8) 및 저항(R11)과, 미분신호의 (-)성분 제거를 위한 다이오드(D4)로 구성되고, 상기 미분수단(20)은, 피이드백되는 CTL펄스를 미분처리하는 콘덴서(C7) 및 저항(R10)과, 미분신호의 (-)성분 제거를 위한 다이오드(D3)로 구성된 비디오 테이프의 재생 제어신호 재생 및 파형 변환장치.2. The amplifier according to claim 1, wherein the amplifying means (13) comprises a resistor (R1) and a capacitor (C1) (C2) for removing the noise of the input CTL signal, an operational amplifier (A1) for amplifying the noise-free CTL signal, and the same. A resistor R3 (R4) and a capacitor C3 for gain setting, and a bias voltage divider R5 (R6) of the operational amplifier A1, wherein the waveform converting means 14 is provided with an input CTL signal. Comprising a comparator A2 and its reference voltage setting resistors R7 and R8, the positive peak detecting means 15 includes a comparator A3 of an input CTL signal and a positive signal of the input CTL signal. Cycle detection diode (D1), a capacitor (C5) for the level holding of the detected CTL signal, and a transistor (Q1) for performing the discharge control of the capacitor (C5), the inverting means (16) Comprising an operational amplifier (A5), the negative peak detecting means (17) includes a comparator (A4) of the input CTL signal, a positive period detection diode (D2) of the inverted input CTL signal, and the detection. CTL A condenser C6 for level holding of the arc and a transistor Q2 for performing discharge control of the condenser C6, and the differentiating means 19 differentiates the inverted CTL pulses fed back. ) And a resistor (R11), and a diode (D4) for removing the negative component of the differential signal. The differentiating means (20) includes a capacitor (C7) and a resistor (C7) for differentiating the CTL pulse to be fed back. R10) and a reproduction control signal reproduction and waveform conversion device for a video tape composed of a diode (D3) for removing the negative component of the differential signal. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920025164A 1992-12-23 1992-12-23 Reproducing control signal and wave form transformation system of video tape KR950004553B1 (en)

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Application Number Priority Date Filing Date Title
KR1019920025164A KR950004553B1 (en) 1992-12-23 1992-12-23 Reproducing control signal and wave form transformation system of video tape

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Application Number Priority Date Filing Date Title
KR1019920025164A KR950004553B1 (en) 1992-12-23 1992-12-23 Reproducing control signal and wave form transformation system of video tape

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KR940016162A true KR940016162A (en) 1994-07-22
KR950004553B1 KR950004553B1 (en) 1995-05-02

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