KR950004057Y1 - Color system combination apparatus - Google Patents
Color system combination apparatus Download PDFInfo
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- KR950004057Y1 KR950004057Y1 KR2019890012769U KR890012769U KR950004057Y1 KR 950004057 Y1 KR950004057 Y1 KR 950004057Y1 KR 2019890012769 U KR2019890012769 U KR 2019890012769U KR 890012769 U KR890012769 U KR 890012769U KR 950004057 Y1 KR950004057 Y1 KR 950004057Y1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/7921—Processing of colour television signals in connection with recording for more than one processing mode
- H04N9/7925—Processing of colour television signals in connection with recording for more than one processing mode for more than one standard
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N11/00—Colour television systems
- H04N11/06—Transmission systems characterised by the manner in which the individual colour picture signal components are combined
- H04N11/20—Conversion of the manner in which the individual colour picture signal components are combined, e.g. conversion of colour television standards
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/79—Processing of colour television signals in connection with recording
- H04N9/793—Processing of colour television signals in connection with recording for controlling the level of the chrominance signal, e.g. by means of automatic chroma control circuits
- H04N9/7933—Processing of colour television signals in connection with recording for controlling the level of the chrominance signal, e.g. by means of automatic chroma control circuits the level control being frequency-dependent
- H04N9/7936—Processing of colour television signals in connection with recording for controlling the level of the chrominance signal, e.g. by means of automatic chroma control circuits the level control being frequency-dependent by using a preemphasis network at the recording side and a deemphasis network at the reproducing side
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- Processing Of Color Television Signals (AREA)
Abstract
내용 없음.No content.
Description
제1도는 본 고안에 따른 컬러시스템 조합장치 블럭도.1 is a block diagram of a color system combination device according to the present invention.
제2도는 제1도에서의 각부 파형도로서, 제2(a)도는 SECAM 기록계에서 대역통과 필터의 파형도이고, 제2(b)도는 1.1[MHz] 밸 필터에서의 파형도이며, 제2(c)도는 1.1[MHz] 대역통과 필터의 파형도, 제2(d)도는 팔(PAL) 기록계에서 로우 패스필터를 통한 주파수 대역도이다.FIG. 2 is a waveform diagram of each part in FIG. 1, FIG. 2 (a) is a waveform diagram of a bandpass filter in a SECAM recorder, and FIG. 2 (b) is a waveform diagram in a 1.1 [MHz] value filter. (c) is a waveform diagram of the 1.1 [MHz] bandpass filter, and (d) is a frequency band diagram through a low pass filter in a PAL recorder.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
11 : 휘도신호 처리부 12 : 자동이득제어부11: luminance signal processing unit 12: automatic gain control unit
13a, 13b : 로우 패스필터 14 : 프리앰퍼시스13a, 13b: low pass filter 14: pre-emphasis
15 : 화이트/다크 클립부 16 : 주파수변조부15: white / dark clip portion 16: frequency modulator
17 : 하이 패스필터 18a, 18b : 컬러신호처리부17: high pass filter 18a, 18b: color signal processing unit
19a~19d : 대역통과 필터 20 : 벨필터19a ~ 19d: Band pass filter 20: Bell filter
21 : 동기게이트 22 : 자동컬러제어부21: synchronization gate 22: automatic color control unit
23 : 수평동기팁 24 : 위상 시프트부23: horizontal sync tip 24: phase shift unit
25a : 서브콘버터 25b : 메인콘버터25a: sub-converter 25b: main converter
26 : 믹싱부 27 : 앰프26: mixing unit 27: amplifier
Hd : 헤드Hd: Head
본 고안은 컬러시스템 조합장치에 관한 것으로, 특히 팔(PAL)기록 컬러레벨 및 세캄(SECAM) 기록컬러레벨을 서로 혼합(Mix)하여 2개의 시스템(PAL,SECAM)을 한 개의 브이씨알로 사용가능하도록 컬러시스템 조합장치에 관한 것이다.The present invention relates to a color system combination device, and in particular, it is possible to use two systems (PAL, SECAM) as one VAL by mixing (Pixel) PAL recording color level and SECAM recording color level with each other. To a color system combination device.
종래의 기술구성은 비디오 신호가 브이씨알 기록계에 입력되면 휘도신호 처리는 팔(PAL) 방식이나 세캄(SECAM) 방식으로 공통 처리된다.According to the prior art configuration, when a video signal is input to a VR recorder, the luminance signal processing is commonly processed in the PAL or SECAM method.
즉, 회도신호는 입력신호 레벨이 변동할 경우 이것을 방지하기 위해서 자동적으로 조정하고 출력 레벨이 항상 일정하게 되도록 작동하는 AGC (Automatic Gain Control)를 거쳐서 4. 433619[MHZ]의 컬러신호성분을 제거하고 출력에는 3[MHZ]의 휘도신호 성분만 검출한다.That is, the gray signal is automatically adjusted to prevent the input signal level from changing and the color signal component of 433619 [MH Z ] is removed through the AGC (Automatic Gain Control) which operates so that the output level is always constant. And only 3 [MH Z ] luminance signal components are detected at the output.
그리고 프리-엠퍼시스(Pre-Emphasis)를 하여 에프엠(FM)의 과변조를 방지하고 동기신호 선단에 직류전압이 변동하지 않도록 일정전압에 클램프(CLAMP)된다.Pre-Emphasis is performed to prevent over-modulation of the FM and clamp to a constant voltage so that the DC voltage does not change at the leading edge of the synchronization signal.
이때 엠퍼시스를 행하여 시그날(Signal)이 올라가고 내려가는 부분에 스파이크(Spike)가 생기게 되어 FM 변조 했을때 과변조가 되므로 화이트 클립(White Clip)회로와 다크클립(Dark Clip)회로를 통하여 일정레베 전압 이상 및 일정레벨 전압 이하를 제거(Cut)하고 있다.At this time, the signal is raised and the spike is generated at the part where the signal goes up and becomes over-modulated when the FM is modulated. And below a certain level voltage are removed.
이후 비디오 신호의 레벨에 따라서 발진주파수가 바뀌는 발진기로 FM 모듈레이션(Modulation)하여 저반송파 FM신호로 변환하고, FM 신호에 변환된 휘도신호는 다음 고역 필터에서 FM 신호 하측 대파성분중 저역변화되는 색신호의 주파수 성분과 겹치는 성분을 감쇄시키고, 이 신호 성분인 PAL 컬러 기록성분과 혼합 (Mix)되어 진나.The oscillation frequency is then modulated by an oscillator whose oscillation frequency changes according to the level of the video signal, and then converted into a low-carrier FM signal.The luminance signal converted into the FM signal is a low-frequency component of the lower frequency component of the FM signal in the next high pass filter. A component overlapping the frequency component is attenuated and mixed with the PAL color recording component which is the signal component.
여기서 PAL 컬러 기록성분에 대해서 설명하면, 휘도성분은 제거되고 4. 433619[MHZ]의 색신호 성분만 통과함으로서 추출된 4. 433619[MHZ]의 컬러 시그날은 버퍼를 통하여 ACC(Automatic Color Control)회로에 입력되고, ACC에서는 버스트 레벨(Burst Level)에 의해 색신호 레벨의 크기를 일정하게 유지하여 버스트 엠퍼시스(Burst Emphasis) 및 메인콘버터(Main Converter)에 출력하며, ACC에서 나온 컬러신호 (4. 433691{MHZ]를 저역 변환 컬러신호 (627{MHZ])와 4.43[MHz]의 합과 차의 신호를 만들어 로우 패스필터에 입력하고, 로우 패스필터는 627[KHz]만 통과시켜 휘도신호와 혼합하여 테이프에 기록된다.Here will be described with respect to the PAL color record component, a luminance component is removed 4. 433619 [MH Z] of the color signal 4. 433619 [MH Z] extracted by passing only the color signal component of the (Automatic Color Control) ACC via the buffer Input to the circuit, the ACC keeps the color signal level constant by the burst level and outputs it to the burst emphasis and the main converter, and the color signal from the ACC (4. 433691 {MH Z ] is inputted to the low pass filter by adding the sum signal and difference of the low-conversion color signal (627 {MH Z ]) and 4.43 [MHz], and the low pass filter passes only 627 [KHz]. Mixed with and recorded on tape.
그러나 이상에서 설명한 바와같이 종래 기술구성은 휘도 기록계와 PAL 컬러기록계만 구성이 되어 있어 SECAM 컬러 시그날이 입력되면 SECAM 컬러 성분이 기록이 되지 않고 휘도성분만 기록이되는 문제점이 있었다.However, as described above, the prior art configuration includes only the luminance recorder and the PAL color recorder. When the SECAM color signal is input, the SECAM color component is not recorded, but only the luminance component is recorded.
따라서 종래의 문제점을 제거하기 위해 본 고안은 세캄 컬러 기록계의 칼라기록 전류를 조정하므로서 추가조합하여 듀엘 시스템(Dual System)을 형성한 본 고안에 따른 휘도신호를 공통으로 하여 시그널에 따라 각각 레코딩할 수 있도록 한 컬러시스템 조합장치에 창안한 것으로, 이하 첨부된 도면을 참조하여 상세히 설명하면 다음과 같다.Therefore, in order to eliminate the conventional problem, the present invention can adjust the color recording current of the Secam color recorder and additionally combine the luminance signals according to the present invention to form a dual system, so that each can be recorded according to the signal. Invented in a color system combination device so as to be described in detail below with reference to the accompanying drawings.
입력되면 비디오신호중 휘도신호에 대해서만 처리하는 휘도신호 처리부(11)와, 상기 휘도신호 처리부(11)의 출력신호에서 휘도성분만 검출하는 로우 패스필터(13a)와, 엠퍼시스를 행한 상기 로우 패스 필터(13a)의 출력을 입력받아 주파수 변조부(16)의 과변조 방지를 위해 일정전압에 클램프하는 화이트/다크 클립부(15)와, 상기 주파수 변조부(16)에서 출력되는 FM 신호중 저역변환되는 색신호 주파수 성분과 겹치는 성분을 감쇄시키는 하이 패스필터(17)와, 입력되는 비디오 신호에 따라 세캄 또는 팔 방식별로 처리하도록 스위칭하는 선택스위치(SW)와, 상기 선택스위치(SW)를 통하 세캄방송 영상신호에 대해 컬러신호처리부(18a), 밴드패스필터(19a)를 통해 검출된 컬러 성분에서 컬러 서브 캐리어(Sub-Carrier) 성분을 카운트 다운(count down) 하는 벨 필터(20)와, 동기 게이트(21)를 통한 상기 벨 필터(20)의 출력을 입력받아 컬러신호 성분만 검출하는 대역통과 필터(19b)와, 컬러신호처리부(18b) 및 대역통과 필터(19c)를 통한 팔(PAL) 방송 영상신호를 버스트 레벨에 의해 색신호 레벨의 크기를 일정하게 유지하도록 한 자동컬러제어부(22)와, 수평동기팁(23)의 제어신호에 따라 위상을이동시키는 위상 시프트부(24)의 위상 주파수에 따라 주파수 변환하는 서브콘버터(25a)와, 대역통과 필터(19d)를 통한 서브콘버터(25a)의 주파수 신호와 상기 자동컬러제어부(22)의 신호의 합의 성분 또는 차의 성분을 얻도록 한 뒤 대역통과 필터(13b)로 출력하는 메인콘버터(25b)와, 상기 하이 패스필터(17)를 통하 휘도성분과 대역통과 필터(19) 및 로우 패스필터(13b)를 통한 세캄 및 팔 방송방식별 컬러신호 성분을 혼합하고 앰프(27)를 거쳐 헤드(Hd)로 출력하는 믹싱부(26)로 구성한다.A luminance signal processing unit 11 for processing only a luminance signal of the video signal when input, a low pass filter 13a for detecting only a luminance component from an output signal of the luminance signal processing unit 11, and the low pass filter performing an emphasis; A white / dark clip unit 15 that receives the output of 13a and clamps to a predetermined voltage to prevent overmodulation of the frequency modulator 16, and the low frequency conversion of the FM signal output from the frequency modulator 16 High pass filter 17 for attenuating components overlapping with color signal frequency components, selection switch SW for processing according to the Secam or arm method according to the input video signal, and Secam broadcasting image through the selection switch SW. Synchronize with the bell filter 20 which counts down the color sub-carrier components from the color components detected by the color signal processor 18a and the band pass filter 19a with respect to the signal. A band pass filter 19b that receives the output of the bell filter 20 through a sheet 21 and detects only a color signal component, and an arm PAL through the color signal processor 18b and the band pass filter 19c. Phase frequency of the phase shift unit 24 which shifts the phase according to the control signal of the horizontal color sync tip 23 and the automatic color control unit 22 which keeps the size of the color signal level constant by the burst level. After the sub-converter (25a) and the frequency signal of the sub-converter (25a) through the band pass filter (19d) and the signal of the signal of the automatic color control unit 22 to obtain a component of the difference The main converter 25b outputs to the bandpass filter 13b, and the color of each camera and arm broadcast system through the luminance component through the high pass filter 17 and the bandpass filter 19 and the low pass filter 13b. The signal components are mixed and output to the head Hd via the amplifier 27 It constitutes a mixing portion 26 for.
이와같이 구성된 본 발명의 작용 및 효과를 상세히 설명하면 다음과 같다.Referring to the operation and effect of the present invention configured as described above in detail.
제1도에서 비디오 신호가 입력(Vin)되면 휘도신호 처리는 팔(PAL) 방송방식에서나 세캄(SECAM) 방송방식에서 공통으로 처리 되므로 우선 휘도신호 성분에 대해서 설명하면, 입력영상신호를 휘도신호 처리부(11)에서 휘도신호에 대해서만 처리하고 자동이득제어부(AGC : 12)로 보내면 이 제어부(12)에서는 입력신호레벨의 변동을 방지하기 위해 출력레벨을 항상 일정하게 자동조절한다. 출력레벨이 조절된 신호가 로우 패스필터(13a)에 입력되면, 로우 패스필터(13a)에서 4. 433619[MHz]의 컬러신호 성분을 제거하고 3[MHz]의 휘도신호 성분만 검출하여 출력토록 한다.In FIG. 1, when the video signal is input, the luminance signal processing is commonly performed in the PAL broadcasting system or the SECAM broadcasting system. Therefore, the luminance signal component will be described first. If only the luminance signal is processed at (11) and sent to the automatic gain control unit (AGC) 12, the control unit 12 always automatically adjusts the output level constantly to prevent variations in the input signal level. When the signal whose output level is adjusted is input to the low pass filter 13a, the low pass filter 13a removes the color signal component of 433619 [MHz] and detects only the luminance signal component of 3 [MHz] for output. do.
그리고, 상기 로우 패스필터(13a)에서 검출된 휘도 신호성분에 대해 프리엠퍼시스(14)는 고역을 너무 살리면 흑. 백 반전 및 S/N 비(Signal/Noise비)가 저하되므로 FM 변조를 방지하고, 동기신호 선단에 직류전압이 변동하지 않도록 일정전압에 클램프한다.Then, the pre-emphasis 14 is black when the high frequency is too high for the luminance signal component detected by the low pass filter 13a. Since the back inversion and the S / N ratio (signal / noise ratio) are reduced, the FM modulation is prevented and clamped to a constant voltage so that the DC voltage does not change at the leading edge of the synchronization signal.
즉, 앰퍼시스를 행하면 시그날이 올라가고 내려가는 스파이크가 생기게 되어 이성분을 FM 변조 했을때 과변조가 되므로 화이트/다크 클립부(15)에서 일정레벨 전압을 제거한다.In other words, if the signal is raised and the signal goes up and down, there is a spike, and the FM component is overmodulated when the FM component is modulated, so the white / dark clip unit 15 removes the constant level voltage.
이후 비디오 신호의 레벨에 따라서 발진주파수가 바뀌는 발진기로 FM 모듈레이션하여 저반송과 FM 신호를 변환하고, FM 신호에 변환된 휘도신호는 다음 하이 패스필터(17)를 통해 FM 신호 하측대파성분중 저역변환되는 색신호의 주파수 성분과 겹치는 성분이 감쇄된다.Thereafter, FM modulation is performed with an oscillator whose oscillation frequency changes according to the level of the video signal to convert the low carrier and the FM signal, and the luminance signal converted into the FM signal is then converted through the high pass filter 17 to the low frequency component of the lower frequency component of the FM signal. Components overlapping the frequency components of the color signal to be attenuated.
이 신호 성분은 팔(PAL)컬러 및 세캄(SECAM)컬러 성분과 믹싱부(26)에서 혼합되어 진다.This signal component is mixed in the mixing section 26 with the PAL color and SECAM color components.
팔(PAL)컬러 기록계는 선택스위치(SW)에 의해 영상신호가 입력되면 컬러신호처부(18b)에서 컬러신호에 대해서만 처리하고 대역통과 필터(19c)를 통해 휘도성분을 제거하고 4. 433619[MHz]의 컬러 시그날은 버퍼(Buffer)를 통하여 자동컬러제어부(ACC : 22)에 입력된다. 그러면 자동컬러제어부(22)에서 버스트 레벨에 의해 색신호 레벨의 크기를 일정하게 유지시켜 메인 콘버터(25b)로 출력하면 이 메인콘버터(25b)는 자동컬러제어부(22)에서 나온 4. 433619[MHz]의 컬러신호를 위상시프트(24), 서브콘버터(25a) 및 나온 4. 433619[MHz]의 컬러신호를 위상시프트(24), 서브콘버터(25a) 및 대역통과 필터(19d)를 통한 저역 변환컬러 신호(627[KHz]와 4. 43[MHz]의 컬러신호의 합과 차의 신호를 만들어 (제2(d)도) 1.5[MHz] 로우 패스필터(13b)에 입력된다.When the image signal is input by the selector switch, the PAL color recorder processes only the color signal at the color signal destination 18b, and removes the luminance component through the band pass filter 19c. ] Is input to the automatic color control unit (ACC) 22 through a buffer. Then, when the color signal level is kept constant by the burst level in the automatic color control unit 22 and outputted to the main converter 25b, the main converter 25b is 4. 433619 [MHz] released from the automatic color control unit 22. The color signal of the phase shift 24, the sub-converter 25a and the output signal of the 433619 [MHz] phase shift 24, the sub-converter 25a and the band pass filter (19d) A signal of the sum and difference of the signal 627 [KHz] and the color signal of 4.43 [MHz] is generated (second (d)) and input to the 1.5 [MHz] low pass filter 13b.
1.5[MHz] 로우 패스필터(13b)는 627[KHz]만 통과시켜 하이 패스 필터(17)를 통한 휘도신호와 믹싱부(26) 혼합되고 헤드(Hd)를 거쳐 테이프에 기록된다.The 1.5 [MHz] low pass filter 13b passes through only 627 [KHz], the luminance signal through the high pass filter 17 and the mixing section 26 are mixed, and is recorded on the tape via the head Hd.
마찬가지로 세캄(SECAM) 컬러 기록계는 칼라신호 처리부(18a) 및 4.3{MHz]의 대역통과 필터(19a)를 통해서 제2(a)도에 도시된 바와같은 컬러성분만 검출해낸 다음, 1, 1[MHz]의 벨필터(20)에서 2개의 컬러 서브-캐리어(Sub-Carrier) 성분(3. 9[MHz] 및 4. 75[MHz])을 1/4카운트 다운 (Count Down)하고(제2(b)도에 도시), 동기 게이트(21) 및 대역통과 필터(19b)를 거쳐 얻은 제2(c)도와 같은 컬러 성분을 하이 패스필터(17)를 통한 휘도성분과 혼합하여 앰프(REC Amp)(27)에서 증폭한후 헤드(Hd)를 통하여 테이프에 기록한다.Similarly, the SECAM color recorder detects only the color components shown in FIG. 2 (a) through the color signal processor 18a and the bandpass filter 19a of 4.3 {MHz], and then 1, 1 [ MHz] and counts down two color sub-carrier components (3.9 [MHz] and 4. 75 [MHz]) in the bell filter 20 [second]. (b) as shown in FIG. 2, the second component (c) obtained through the synchronous gate 21 and the bandpass filter 19b is mixed with the luminance component through the high pass filter 17 to obtain an amplifier (REC Amp). After amplification at (27), it is recorded on the tape through the head (Hd).
따라서 본 고안에 따른 시스템 조합장치는 한개의 브이씨알에 2개의 시스템, 즉 팔(PAL) 및 세캄(SECAM) 컬러 기록 전류를 조정하여 휘도신호를 공통으로 하여 시그날에 따라서 각각 레코딩할 수 있는 효과를 갖게 된다.Therefore, the system combination device according to the present invention has the effect of recording two signals according to signals by adjusting two systems, namely, PAL and SECAM color recording currents, in one V-AL. Will have
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