KR0146297B1 - Compensation circuit against delaying of the pal+ vcr - Google Patents
Compensation circuit against delaying of the pal+ vcrInfo
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- KR0146297B1 KR0146297B1 KR1019950000574A KR19950000574A KR0146297B1 KR 0146297 B1 KR0146297 B1 KR 0146297B1 KR 1019950000574 A KR1019950000574 A KR 1019950000574A KR 19950000574 A KR19950000574 A KR 19950000574A KR 0146297 B1 KR0146297 B1 KR 0146297B1
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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
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
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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
- G11B20/10527—Audio or video recording; Data buffering arrangements
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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
- G11B20/22—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing distortions
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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
- G11B20/10527—Audio or video recording; Data buffering arrangements
- G11B2020/10537—Audio or video recording
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- Processing Of Color Television Signals (AREA)
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Abstract
본 발명은 PAL+브이씨알에서 색신호와 휘도신호의 처리과정에서 발생되는 시간차를 보상하는 기술에 관한 것으로, PAL+브이씨알에 있어서 녹화모드에서 색신호에 삽입된 헬퍼신호를 휘도신호에 삽입하여 기록하거나, 재생모드에서 그 휘도신호 영역에 삽입된 헬퍼신호를 색신호 영역에 실어 출력할 때 저역필터를 이용하여 각 처리경로상에서 발생되는 시간차를 정확하게 보상하고 노이즈를 제거함으로써 신호비트를 재기록할 때 동기가 정확하게 맞아 고품질의 화상 및 음질을 제공할 수 있게 된다.The invention PAL + V in CR relates to a technique for compensating a time delay occurring in the processing of the color signal and luminance signal, PAL + V by inserting the helper signal inserted in the color signal in the recording mode according to the brightness signal CR record or In the playback mode, when the helper signal inserted into the luminance signal region is output to the color signal region, the low pass filter is used to accurately compensate for the time difference occurring in each processing path and to remove the noise to synchronize the signal bit again. It is possible to provide high quality image and sound quality.
Description
제1도는 본 발명 기록모드에서 PAL+브이씨알의 신호비트 지연보상 블록도.1 is a block diagram of signal bit delay compensation of PAL + VRL in the recording mode of the present invention.
제2도는 본 발명 재생모드에서 PAL+브이씨알의 신호비트 지연보상 블록도.2 is a block diagram of signal bit delay compensation of PAL + VRL in the reproduction mode of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
100A,200A : 휘도/색신호분리부 100B1: 휘도신호 처리부100A, 200A: luminance / color signal separation unit 100B 1 : luminance signal processing unit
100B2: 휘도/헬퍼신호 처리부 100C : 색신호 처리부100B 2 : luminance / helper signal processing unit 100C: color signal processing unit
100D,200D : 스위칭제어신호 생성부 100E : 신호기록부100D, 200D: Switching control signal generator 100E: Signal recorder
200B : 휘도신호 재기록부 200C : 색신호/헬퍼신호 처리부200B: luminance signal rewriting unit 200C: color signal / helper signal processing unit
본 발명은 팔플러스(PAL+) 브이씨알에서 색신호와 휘도신호의 처리과정에서 발생되는 시간차를 보상하는 기술에 관한 것으로, 특히 녹화모드에서 색신호에 삽입된 헬퍼신호를 휘도신호에 삽입하여 기록하거나, 재생모드에서 그 휘도신호 영역에 삽입된 헬퍼신호를 색신호 영역에 실어 출력할 때 각 처리경로상에서 발생되는 시간차를 보상하고 노이즈성분을 제거하는데 적당하도록한 팔플러스 브이씨알의 지연보상 회로에 관한 것이다.The present invention relates to a technique for compensating for a time difference generated in a process of processing a color signal and a luminance signal in PAL + (VAL + V). In particular, in a recording mode, a helper signal inserted in a color signal is inserted into a luminance signal and recorded, The present invention relates to a delay compensation circuit of PAL Plus VSR suitable for compensating for the time difference generated in each processing path and removing noise components when a helper signal inserted in the luminance signal region in the reproduction mode is outputted to the color signal region.
일반적인 PAL+브이씨알에 있어서는 녹화모드에서 색신호에 삽입된 헬퍼신호를 휘도신호에 삽입하여 기록하거나, 재생모드에서 그 휘도신호 영역에 삽입된 헬퍼신호를 색신호 영역에 실어 출력할 때 각 처리경로상에서 발생되는 시간차를 정확하게 보상하지 못하여 신호비트를 재기록할 때 동기가 정확하게 맞지않게 되고, 이로 인하여 고품질의 화상 및 음질을 제공할 수 없게 되는 문제점이 있었다.In general PAL + VC, when the helper signal inserted in the color signal is recorded in the luminance signal in the recording mode or recorded, or the helper signal inserted in the luminance signal region in the playback mode is output in the color signal region, it is generated on each processing path. There is a problem in that the synchronization is not accurately corrected when rewriting the signal bits because the time difference is not accurately compensated for, and thus it is impossible to provide a high quality image and sound quality.
따라서, 본 발명의 목적은 녹화모드에서 색신호에 삽입된 헬퍼신호를 휘도신호에 삽입하여 기록하거나, 재생모드에서 그 휘도신호 영역에 삽입된 헬퍼신호를 색신호 영역에 실어 출력할 때 저역필터를 이용하여 각 처리경로상에서 발생되는 시간차를 정확하게 보상하고, 노이즈를 제거하는 보상회로를 제공함에 있다.Accordingly, an object of the present invention is to use a low pass filter to insert a helper signal inserted into a color signal into a luminance signal in a recording mode and to record or output a helper signal inserted into the luminance signal region into a color signal region in a reproducing mode. The present invention provides a compensation circuit that accurately compensates the time difference generated in each processing path and removes noise.
제1도는 본 발명 기록모드에서 PAL+브이씨알의 신호비트 지연보상 블록도로서 이에 도시한 바와 같이, 한편으로는 복합영상신호(CVBSin)의 이득을 조정하여 복합영상신호 출력단(CVBSout)으로 출력하고, 다른 한편으로는 헬퍼구간을 제외한 일반 복합영상신호를 휘도/색신호 분리하는 휘도/색신호분리부(100A)와, 상기 휘도/색신호분리부(100A)에서 분리된 휘도신호를 복조처리하여 일정시간동안 지연시켜 헬퍼신호를 삽입한 후 신호비트를 재기록하는 휘도신호 처리부(100B1)와, 상기 휘도/색신호분리부(100A)에서 분리 출력되는 헬퍼신호를 복조처리하여 상기 분리된 메인 휘도신호 영역에 삽입할 수 있도록 하는 휘도/헬퍼신호 처리부(100B2)와, 상기 분리된 색신호를 저역변환하여 일정시간 지연시킨 후 출력하는 색신호 처리부(100C)와, 상기 복합영상신호(CVBSin)에 삽입된 PAL+프레임을 스캔하여 라인신호(LINE23), 헬퍼마커신호(HM)를 생성하고, WSS 정보부터 PAL+신호를 검출하여 상기 각부의 스위칭을 제어하는 스위칭제어신호 생성부(100D)와, 상기 휘도신호 처리부(100B1)에서 출력되는 휘도신호와 색신호 처리부(100C)에서 출력되는 색신호를 혼합하여 기록매체에 기록하는 신호기록부(100E)로 구성하였다.FIG. 1 is a block diagram of signal bit delay compensation of PAL + VR in the recording mode of the present invention. As shown in FIG. 1, the gain of the composite video signal CVBS in is adjusted to the composite video signal output terminal CVBS out . On the other hand, the luminance / color signal separation unit 100A for separating the luminance / color signal from the general composite video signal excluding the helper section and the luminance signal separated by the luminance / color signal separation unit 100A are demodulated and fixed. The separated main luminance signal region is demodulated by demodulating the luminance signal processing unit 100B 1 for rewriting the signal bits after inserting the helper signal by delaying the time and the helper signal separated and output from the luminance / color signal separation unit 100A. A luminance / helper signal processing unit 100B 2 capable of being inserted into the video signal, a color signal processing unit 100C outputting a delay after a predetermined time by performing low-pass conversion of the separated color signal, and the composite video signal. Generates a switching control signal that scans the PAL + frame inserted in the CVBS in to generate a line signal LINE 23 and a helper marker signal HM, and detects the PAL + signal from the WSS information to control the switching of each part. The unit 100D and the signal recording unit 100E for mixing the luminance signal output from the luminance signal processing unit 100B 1 and the color signal output from the color signal processing unit 100C are recorded on the recording medium.
제2도는 본 발명 재생모드에서 PAL+브이씨알의 신호비트 지연보상 블록도로서 이에 도시한 바와 같이, 재생되는 복합영상신호(CVBS)에서 휘도신호(Y)와 색신호(C)를 분리한 다음 색신호를 일정시간 지연시키고 이들을 각기 복조출력하는 휘도/색신호분리부(200A)와, 상기 분리된 휘도신호(Y)에서 노멀 휘도신호와 복조된 헬퍼신호를 분리한 다음 일정시간 지연시키고 스위칭제어신호 생성부(200C)에서 출력되는 라인신호(LINE23)와 신호 재기록부(220)의 출력을 비디오라인23에 삽입하여 재기록된 휘도신호를 생성하는 휘도신호 재기록부(200B)와, 상기 휘도신호 재기록부(200B)에서 분리된 헬퍼신호를 클리어하고, 헬퍼마커신호(HM)를 이용하여 상기 복원된 색신호에 그 클리어된 헬퍼신호를 삽입하여 출력하는 색신호/헬퍼신호 처리부(200C)와, 상기 휘도신호 재기록부(200B)에서 출력되는 휘도신호와 색신호/헬퍼신호 처리부(200C)에서 출력되는 색신호를 혼합하여 복합영상신호 출력단(CVBSout)으로 출력하는 혼합기(216)와, 상기 재생된 복합영상신호(CVBS)에 삽입된 PAL+프레임을 스캔하여 라인신호(LINE23), 헤퍼마커신호(HM)를 생성하고, 와이드스크린정보(WSS)로부터 PAL+신호를 검출하여 상기 각부의 스위칭을 제어하는 스위칭제어신호 생성부(200D)로 구성한 것으로, 이와 같이 구성한 본 발명의 작용 및 효과를 상세히 설명하면 다음과 같다.2 is a block diagram of signal bit delay compensation of PAL + VR in the reproduction mode according to the present invention. As shown in FIG. 2, the luminance signal Y and the color signal C are separated from the reproduced composite video signal CVBS, and then the color signal is separated. A predetermined time delay and demodulate and output the demodulated outputs of the luminance / color signal separation unit 200A, and separate the normal luminance signal and the demodulated helper signal from the separated luminance signal Y, and then delay the predetermined time and then switch control signal generation unit. A luminance signal rewriting unit 200B for inserting the line signal LINE 23 and the output of the signal rewriting unit 220 outputted at 200C into the video line 23 to generate the rewritten luminance signal, and the luminance signal rewriting unit ( And a color signal / helper signal processing unit 200C for clearing the helper signal separated in 200B, inserting the cleared helper signal into the restored color signal using the helper marker signal HM, and recovering the luminance signal. Portion and the mixer 216 to output a (200B), the composite video signal output terminal (CVBS out) by mixing the color signal output from the luminance signal and the color signal / helper signal processing unit (200C) that is output from, the reproduced composite video signal (CVBS A switching control signal that scans the PAL + frame inserted into the PAL + frame to generate the line signal LINE 23 and the heap marker signal HM, and detects the PAL + signal from the wide screen information WSS to control the switching of the respective parts. It is composed of the generation unit 200D, the operation and effects of the present invention configured as described in detail as follows.
먼저, 제1도를 참조하여 PAL+신호 녹화처리시 헬퍼신호의 휘도/색신호분리 인터페이싱과정을 설명하면 하기와 같다.First, referring to FIG. 1, the luminance / color signal separation interfacing process of the helper signal during the PAL + signal recording process will be described below.
복합영상신호(CVBSin)의 베이스밴드신호가 입력되면, 이는 자동이득제어부(101)를 통해 적정 수준의 이득을 갖도록 조정된 다음 스위치(102) 및 복합영상신호 출력단(CVBSout)으로 출력된다.When the baseband signal of the composite video signal CVBS in is input, it is adjusted to have an appropriate level of gain through the automatic gain control unit 101 and then output to the switch 102 and the composite video signal output terminal CVBS out .
이때, 스위치(102)는 라인구간신호발생기(118)에서 발생되는 헬퍼마커신호(HM)에 의해 헬퍼구간에서는 고정단자(a)에 단락되고, 그 이외의 구간에서는 고정단자(b)에 단락된다.At this time, the switch 102 is short-circuited to the fixed terminal a in the helper section by the helper marker signal HM generated by the line section signal generator 118, and short-circuited to the fixed terminal b in other sections. .
상기 스위치(102)에서 분리된 헬퍼신호는 대역필터2(106)를 통해 대역필터링된 후 승산기(107)에 의해 발진기(108)에서 출력되는 소정의 발진주파수로 복조되고, 다시 저역필터1(109)를 통해 저역필터링되어 스위치(110)의 타측고정단자(b)에 공급된다.The helper signal separated by the switch 102 is band-filtered through the band filter 2 106 and then demodulated to a predetermined oscillation frequency output from the oscillator 108 by the multiplier 107, and then the low pass filter 1 109. The low pass filtering through) is supplied to the other fixed terminal (b) of the switch (110).
상기 스위치(102)에서 분리된 헬퍼신호 이외의 복합영상신호는 휘도/색신호 콤필터(103)에 공급되어 휘도신호(Y)와 색신호(C)가 분리되고, 그 분리된 휘도신호(Y)는 에프엠(FM) 복조기(104)를 통해 에프엠 복조된 다음 지연기1(105)를 통해 소정시간 지연처리되어 상기 스위치(110)의 일측 고정단자(a)에 공급된다.The composite video signal other than the helper signal separated by the switch 102 is supplied to the luminance / color signal comb filter 103 to separate the luminance signal Y and the color signal C, and the separated luminance signal Y The FM demodulation is performed through the FM demodulator 104 and then delayed for a predetermined time through the delay unit 1 105 and supplied to one fixed terminal a of the switch 110.
이에 따라, 상기 스위치(110)는 신호비트 검출부(117)에서 출력되는 헬퍼마커신호(HM)의 제어에 의해 스위칭되어 휘도신호 영역에 복조처리된 색신호를 삽입하여 출력하게 되고, 이렇게 슈퍼임포즈된 신호는 신호비트 재기록부(111)에 공급된다.Accordingly, the switch 110 is switched by the control of the helper marker signal HM output from the signal bit detection unit 117 to insert and output the demodulated color signal in the luminance signal region. The signal is supplied to the signal bit rewrite unit 111.
한편, 신호비트검출부(117)는 상기 입력 복합영상신호(CVBSin)를 스캔하여 PAL+신호가 검출될 때, PAL+H신호를 하이 상태로 출력하고, 상기 라인구간신호 발생기(118)는 이때에만 라인신호(LINE23) 및 헬퍼마커신호(HM)를 출력하고, 그 PAL+H신호가 로우 상태로 출력될 때에는 그 라인신호(LINE23) 및 헬퍼마커신호(HM)를 출력하지 않는다.On the other hand, the signal bit detector 117 scans the input composite video signal CVBS in and outputs a PAL + H signal in a high state when the PAL + signal is detected, and the line section signal generator 118 at this time. The line signal LINE 23 and the helper marker signal HM are output only, and when the PAL + H signal is output in the low state, the line signal LINE 23 and the helper marker signal HM are not output.
신호재기록부(119)는 상기 신호비트 검출부(117)로부터 PAL+H신호가 하이 상태로 입력될 때 라인신호(LINE23)의 신호비트를 변경하여 새로운 신호비트를 생성하게 되고, 이는 저역필터2(120)를 통해 저역필터링된 후 상기 신호비트 재기록부(111)에 공급된다.When the PAL + H signal is input from the signal bit detector 117 to the high state, the signal rewrite unit 119 changes the signal bit of the line signal LINE 23 to generate a new signal bit. After low pass filtering through the 120, the signal bit rewrite unit 111 is supplied.
그리고, 상기 스위치(110)에서 출력되는 합성신호는 신호비트 재기록부(111)에 공급되어 상기 라인신호(LINE23)와 저역필터2(120)의 출력신호에 의해 신호비트가 재기록된 후 혼합기(116)의 일측 입력신호로 공급된다.Then, the synthesized signal output from the switch 110 is supplied to the signal bit rewrite unit 111 and the signal bit is rewritten by the output signal of the line signal LINE 23 and the low pass filter 2 120, and then the mixer ( 116 is supplied as an input signal on one side.
한편, 상기 휘도/색신호 콤필터(103)에서 분리된 색신호(C)는 대역필터1(112)에 의해 대역필터링된 후 승산기(113)와 동기시프트용 발진기(114)에 의해 저역변환되고, 다시 지연기2(115)에 의해 소정시간 지연처리된 다음 상기 혼합기(116)의 타측입력으로 공급되어 상기 FM변조된 휘도신호와 혼합된 후 헤드(HREC)를 통해 기록매체에 기록된다.Meanwhile, the color signal C separated by the luminance / color signal comb filter 103 is band-filtered by the band filter 1 112, and then low-pass converted by the multiplier 113 and the synchronous shift oscillator 114. After delaying the predetermined time by the delay unit 2 (115), it is supplied to the other input of the mixer 116, mixed with the FM-modulated luminance signal, and recorded on the recording medium through the head (H REC ).
결국, 상기의 과정을 통해 색신호영역에 실려있던 헬퍼신호가 휘도영역으로 옮겨져 기록되면서 그 헬퍼신호 처리과정에서의 지연시간이 보상된다.As a result, as the helper signal carried in the color signal region is transferred to the luminance region and recorded through the above process, the delay time in the process of the helper signal processing is compensated.
여기서 주목할 사항은 상기 헬퍼신호의 복조처리경로에서 대역필터2(106) 및 저역필터(109)에 의해 발생되는 지연시간을 저역필터2(120)로 보상함으로써 즉, 대역필터2(106) 및 저역필터1(109)의 지연시간만큼 지연시간을 갖도록 함으로써 저역성분이 손상되지 않고, 시간지연을 보상하면서 저역필터링 과정에서 노이즈가 제거되어 사운드의 질이 향상된다는 것이다.Note that the low pass filter 2 120 compensates for the delay time generated by the band pass filter 2 106 and the low pass filter 109 in the demodulation processing path of the helper signal, that is, the band pass filter 2 106 and the low pass. By having the delay time as much as the delay time of the filter 1 109, the low frequency component is not damaged and noise is removed during the low frequency filtering process while compensating the time delay, thereby improving the sound quality.
한편, 제2도를 참조하여 PAL+신호 재생처리시 헬퍼신호의 휘도/색신호 분리인터페이싱 과정을 설명하면 하기와 같다.Meanwhile, referring to FIG. 2, the luminance / color signal separation interfacing process of the helper signal during PAL + signal reproduction processing will be described below.
재생헤드(HPB)를 통해 재생된 복합영상신호(CVBS)가 휘도신호 분리기(201)와 색신호 분리기(203)를 각기 통해 휘도신호(Y)와 색신호(C)가 각각 분리되고, 그 분리된 휘도신호(Y)는 에프엠복조기(202)를 통해 노멀 휘도신호가 복원되어 스위치(206), 라인구간신호 발생기(218) 및 신호비트 검출기(219)에 각기 공급된다.The composite image signal CVBS reproduced through the playhead H PB is separated through the luminance signal separator 201 and the color signal separator 203, respectively, and the luminance signal Y and the color signal C are separated. The luminance signal Y is restored to the normal luminance signal through the FM demodulator 202 and supplied to the switch 206, the line segment signal generator 218, and the signal bit detector 219, respectively.
상기 라인구간신호발생기(218)는 상기 복원된 노멀 휘도신호에 삽입된 PAL+프레임을 스캔하여 신호비트(Signalling bit)가 실려있는 라인23에서 라인신호(LINE23)를 출력하고, 수직 헬퍼구간인 라인24∼라인59, 라인275∼라인310, 라인336∼라인371, 라인587∼라인622에서 헬퍼마커신호(HM)를 출력한다. 그리고, 신호비트 검출기(219)는 PAL+프레임에서 라인23의 WSS(WSS: Wide Screen Signal)의 정보를 검출하여 PAL+신호 및 검출된 데이타를 출력하게 된다.The line section signal generator 218 scans the PAL + frame inserted into the restored normal luminance signal and outputs a line signal LINE 23 at line 23 on which a signaling bit is loaded, which is a vertical helper section. The helper marker signal HM is output from the lines 24 to 59, the lines 275 to 310, the lines 336 to 371, and the lines 587 to 622. The signal bit detector 219 detects the information of the wide screen signal (WSS) of the line 23 in the PAL + frame and outputs the PAL + signal and the detected data.
상기 스위치(206)는 상기 헬퍼마커신호(HM)에 의해 스위칭되어 노멀 휘도신호와 헬퍼신호를 분리하여 출력하게 되고, 그 분리된 노멀 휘도신호는 지연기(207A)를 통해 소정시간 지연되어 신호비트 재기록부(208)에 공급되고, 복조된 헬퍼신호는 저역필터1(209)를 통해 저역필터링되어 승산기(210)측으로 공급된다.The switch 206 is switched by the helper marker signal HM to separately output the normal luminance signal and the helper signal, and the separated normal luminance signal is delayed for a predetermined time through the delay unit 207A to signal bits. The demodulated helper signal is supplied to the rewrite unit 208 and low-pass filtered through the low pass filter 1 209 and supplied to the multiplier 210 side.
이에 따라 상기 승산기(210)는 발진기(211)에서 출력되는 소정 주파수의 발진신호로 상기 입력된 헬퍼신호를 재복조하여 헬퍼킬러(212)측으로 공급하고, 그 헬퍼킬러(212)는 4:3티브이에 호환성을 유지하도록 상기 헬퍼마커신호(HM)에 따라 재변조된 헬퍼신호를 클리어시켜 출력하게 되며, 이는 대역필터(213)를 통해 대역필터링되어 스위치(214)의 일측 고정단자(a) 측으로 공급된다.Accordingly, the multiplier 210 re-demodulates the input helper signal with an oscillation signal of a predetermined frequency output from the oscillator 211 and supplies it to the helper killer 212, and the helper killer 212 is 4: 3 multiplier. In order to maintain compatibility to the helper marker signal (HM) to clear the re-modulated helper signal is output, which is band-filtered through the band filter 213 is supplied to the fixed terminal (a) side of the switch 214 do.
한편, 상기 색신호 분리기(203)를 통해 분리된 색신호(C)가 승산기(204)에 공급되고, 그 승산기(204)는 발진기(205)에서 출력되는 소정 주파수의 발진신호로 그 입력된 색신호(C)를 재복조하여 이로부터 원래의 색신호가 복원되고, 지연기(207B)에 의해 소정시간 지연되어 상기 스위치(214)의 타측 고정단자(b)측으로 공급된다.On the other hand, the color signal C separated through the color signal separator 203 is supplied to the multiplier 204, and the multiplier 204 is an oscillation signal of a predetermined frequency output from the oscillator 205 and the input color signal C. ) And the original color signal is restored from this, and is delayed for a predetermined time by the delay unit 207B and supplied to the other fixed terminal b side of the switch 214.
상기 스위치(214)는 상기 헬퍼마커신호(HM)에 의해 스위칭되어 상기 복원된 색신호에 헬퍼신호가 클리어된 구간을 삽입하여 출력하게 되고, 이는 자동컬러제어부(215)를 통해 휘도/색신호분리잭(217)의 색신호단자(JC)에 공급된다.The switch 214 is switched by the helper marker signal (HM) to insert a section in which the helper signal is cleared to the restored color signal, and outputs the same. This is performed through the automatic color control unit 215 to separate the luminance / color signal jack ( 217 is supplied to the color signal terminal J C.
한편, 상기 신호비트 재기록부(208)는 상기 라인구간신호 발생기(218)에서 출력되는 라인신호(LINE23)와 신호 재기록부(220)의 출력을 비디오라인23에 삽입하여 재기록된 휘도신호를 생성하게 되고, 이는 혼합기(216)와 휘도/색신호분리잭(217)의 휘도신호단자(JY)에 공급된다.Meanwhile, the signal bit rewrite unit 208 inserts the line signal LINE 23 output from the line section signal generator 218 and the output of the signal rewrite unit 220 into the video line 23 to generate a rewritten luminance signal. This is supplied to the luminance signal terminal J Y of the mixer 216 and the luminance / color signal separation jack 217.
상기 혼합기(216)는 상기 재기록된 휘도신호와 상기 자동컬러 제어부(215)에서 출력되는 색신호를 혼합하여 복합영상신호 출력단(CVBSout)으로 출력하게 되며, 참고로, 재생시에는 PAL+텔레비젼 수상기에서 컬러플러스를 실행하지 않는다.The mixer 216 mixes the color signals output from the rewritten luminance signal and said automatic color control unit 215, and outputs the composite video signal output terminal (CVBS out), as reference, reproduction, color in a PAL + television receiver Do not run a plus.
여기서 주목할 사항은 상기 헬퍼신호의 처리경로에서 저역필터1(209) 및 대역필터(213)에 의해 발생되는 지연시간을 저역필터2(221)로 보상함으로써 즉, 저역필터1(209) 및 대역필터(213)의 지연시간만큼 지연시간을 갖도록 함으로써 저역성분이 손상되지 않고, 저역필터링과정에서 노이즈가 제거되어 사운드의 질이 향상된다는 것이다.Note that the low pass filter 2 221 compensates for the delay time generated by the low pass filter 1 209 and the band pass filter 213 in the processing path of the helper signal, that is, the low pass filter 1 209 and the band pass filter. By having the delay time as the delay time of 213, the low frequency component is not damaged, and noise is removed in the low frequency filtering process, thereby improving the sound quality.
이상에서 상세히 설명한 바와 같이, 본 발명은 녹화모드에서 색신호에 삽입된 헬퍼신호를 휘도신호에 삽입하여 기록하거나, 재생모드에서 그 휘도신호 영역에 삽입된 헬퍼신호를 색신호 영역에 실어 출력할 때 지연기 또는 저역필터를 이용하여 각 처리경로상에서 발생되는 시간차를 정확하게 보상하고 노이즈를 제거함으로써 음질의 열화를 초래하지 않으면서 브이씨알 세트간의 호환성을 유지할 수 있는 효과가 있다.As described above in detail, the present invention provides a retarder for inserting and recording a helper signal inserted in a color signal in a recording mode in a recording mode, or outputting a helper signal inserted in the luminance signal region in a color signal region in a reproducing mode. Alternatively, the low pass filter can be used to accurately compensate for the time difference generated in each processing path and to remove noise, thereby maintaining compatibility between VLC sets without causing degradation of sound quality.
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Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950000574A KR0146297B1 (en) | 1995-01-14 | 1995-01-14 | Compensation circuit against delaying of the pal+ vcr |
| EP96400082A EP0722254A3 (en) | 1995-01-14 | 1996-01-12 | Delay time compensating apparatus for PAL plus video cassette tape recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019950000574A KR0146297B1 (en) | 1995-01-14 | 1995-01-14 | Compensation circuit against delaying of the pal+ vcr |
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| Publication Number | Publication Date |
|---|---|
| KR960030192A KR960030192A (en) | 1996-08-17 |
| KR0146297B1 true KR0146297B1 (en) | 1998-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1019950000574A KR0146297B1 (en) | 1995-01-14 | 1995-01-14 | Compensation circuit against delaying of the pal+ vcr |
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| KR (1) | KR0146297B1 (en) |
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