KR920009723B1 - Y/c signal modulation method and display apparatus - Google Patents

Abstract

The method is for obtaining double vertical resolution by multiplexing Y signal with 2-line Y signals (Ya,Yb) to perform double scanning while maintaining compatibility with conventional NTSC video. The method includes a multiplexer (11) for multiplexing and modulating the input video with color subcarrier 2fc* to generate YQW signal having double bandwidth of that of original Y signal, an adder (24) for integrating and modulating pre-modulated signals to generate YQ/C signal of 0-10.0 MHz, and a divider (33) for demodulating the modulated signals to generate Ya, Yb, chroma and FM audio signal.

Description

Modulation and Demodulation Method of Multiplexed Y / C Signals

1 is a waveform diagram showing a composite video signal of a TV, where (a) is a frequency distribution of Y / C, and (b) is a Y / C modulation signal and frequency distribution by Y / C signals.

2a is a frequency distribution diagram of a multiplexed YQ / C signal, (b) is a frequency distribution diagram of a 2ch modulation method using a multiplexed YQ / C signal, (c) is a frequency distribution diagram of a signal applied to a rotating head of a VTR, (d ) Is the frequency distribution of the signal used for video disc player and optical fiber.

3 is a frequency distribution diagram of a modulated signal to SHF or satellite communication.

4A is a YQW signal analysis diagram, (b) is a YQW signal waveform diagram, (c) is an analysis diagram of the Y signal for modulating the Y / C signal into a 1ch modulated signal, (d) is a Y / C Schematic showing how to demodulate a signal.

5A is a modulation circuit diagram for a Y / C signal, (b) is a demodulation circuit diagram for a modulated YQ / C, (c) is a demodulation circuit diagram for a digital filter, and (d) is a driver having two columns of R, G, B electron guns. (E) (f) is a CRT showing a process of driving Ya, Yb signals and three R, G, and B signals that can emit two-column electron beams to the CRT.

6A and 6B are diagrams illustrating a process of modulating and demodulating the multiplexed YQ / C signal into 2ch.

7a and b are modulation demodulation diagrams illustrating a process of modulating and demodulating the multiplexed YQ / C signals to VTRs.

8A and 8B illustrate modulation and demodulation diagrams illustrating a process of modulating and demodulating a multiplexed YQ / C signal to transmit a VDP optical fiber.

9A and 9B show modulation and demodulation diagrams illustrating a process of modulating and demodulating multiplexed YQ / C signals to transmit SHF or satellite communications.

10A and 10B illustrate a modulation and demodulation block diagram illustrating a process of converting and demodulating a Y / C signal into a 1ch signal.

11A and 11B show frequency spectrums of a Y / C modulated signal.

Figure 12a is a perspective view of a two-row electron gun of a CRT according to the present invention, (b) is a perspective view showing the R, G, B cathode and two-row grid of the CRT according to the present invention.

13A and 13B are a block diagram of an AD / DA converter having a Y? YL × (1+ (YΔ18)) characteristic among the YQ / C signals of the present invention.

Fig. 14 is a block diagram of an AD / DA converter having Y? Log ₂ (YL / 4) × (1+ (YΔ / 8)) characteristics among YQ / C signals of the present invention.

15 is a CRT display device showing a process of displaying the YQ / C of the present invention on a CRT.

The present invention relates to a modulation and demodulation method and a display apparatus of a multiplexed Y / C signal capable of double-row scanning to attain two times the vertical resolution gravity while using the standard NTSC scanning method.

More specifically, the present invention creates a multiplexed YQ / C signal by modulating a Y / C signal compatible with the composite NTSC composite video signal, and the multiplexed Y / C signal is subjected to a demodulation process. The present invention relates to a CRT and a display device having twice the vertical resolution and two rows of R, G, and B electron guns by easily demodulating two lines to enable two rows of simultaneous scanning.

The conventional scanning method is a single-column scanning method. In order to obtain a high resolution image, the bandwidth of a video signal is increased to increase horizontal resolution, and to increase vertical resolution, the frequency of scanning is increased by using twice the frequency band. The band becomes very wide and becomes a scanning method different from the conventional NTSC scanning method.

Korean Patent Application No. 89-11342, 'New Y / C Signal and Modulation and Demodulation Method' (hereinafter referred to as No. 89-11342), filed by the present applicant, has a higher resolution than the conventional NTSC-type composite video signal. Since the C signal is separated outside of the Y signal band, cross noise caused by the overlapping of the Y signal and the C signal in the same frequency band is fundamentally prevented.

In addition, the Y / C signal can be easily converted into a modulated signal compatible with the existing NTSC modulated signal, so that the Y / C signal can be converted into a Y signal of 0 to 7.2 MHz in consideration of the transmission band of the conventional NTSC method. Fc *, which has a relation of fH, is modulated at the same bandwidth as the C signal of the conventional NTSC system, and the Y signal is set to 0- with a sampling period of 2fc * with fc * as the fundamental frequency. The 0 to 7.2 MHz band from which about 20% of the high range is removed from the Y signals of fc * is defined as the Y signal in the Y / C signal.

In addition, the difference in the sampling period of the Y signal and the C signal has a relationship of about 5: 1 by comparing the bandwidth between the Y signal and the C signal.

Therefore, if the sampling period of the C signal is 1/5 of the sampling period of the Y signal, a signal band of fc * carriers having 2fc * ×) 1/5) = 0.4 fc * as the sampling period is created.

The Y / C signal thus produced is a ΔF difference of ΔF = (integer of about 570) × fH-227.5fH, that is, (fc * -fc), in order to obtain a modulated signal compatible with existing NTSC modulation signals. It is modulated with two carrier frequencies with and obtains Y / C modulated signal that is compatible with existing NTSC modulated signal and transmits high resolution video signal in its overlap band.

However, since this Y / C signal is a high resolution video signal by one line of Y signal, Y signal can get 0 ~ 7.2MHz wider than 0 ~ 4.2MHz in NTSC system, which can contribute to increase of horizontal resolution. This did not increase the number of rojectors who determined the vertical resolution.

Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to use a conventional NTSC scanning method, and multiplex Y signals of Y / C signals in the 0 to 7.2 MHz band by two-line Y signals. In addition to obtaining the same horizontal resolution as the Y / C signal, two-row scanning is possible by separating the two Y signals, so that the number of shots can be doubled to obtain a double vertical resolution increase. The present invention provides a modulation and demodulation method of a multiplexed Y / C signal capable of two-row scanning.

Another object of the present invention is the multiplexed Y / C signal multiplexed Y / C to be applied to the modulation of the TV 2ch band, VTR recording, conversion of VDP and optical fiber signals, modulation signals of SHF or satellite communication signal as it is The present invention provides a method for modulating and demodulating a signal.

Another object of the present invention is to provide a multiplex modulation and demodulation method capable of two-column scanning in which a modulated signal capable of transmitting high resolution video signals while being compatible with the existing NTSC scheme in a TV 1ch band is modulated.

Another object of the present invention is a multiplexed Y / C capable of two-column scanning configured to perform two-column scanning of the R, G, B signals by the loudspeaker and the Y signal by the grid on the signals formed by the Y / C signals through the modulation / demodulation process. A display device for displaying a signal is provided.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

5 is a circuit diagram illustrating a multiplexing modulation process of a YQ / C signal according to the present invention, wherein a Y-signal modulation of 0 to 7.2MHs composed of a multiplexer 18 and a low pass filter 12 is multiplexed by color coding and 2fc *. 7.5 MHz through a mixer 13, 14, adder 15, and band pass filter 16 to modulate the color difference signals RY and BY as color subcarriers fc ^* having a 90 ° phase difference. A C signal modulator in the 9.6 MHz band, a voice signal modulator for obtaining a 9.8 MHz to 10.0 MHz voice modulated signal through the FM modulator 17 and the band pass filter 18, a color carrier oscillator 19, A color carrier carrier oscillator composed of the phase shifter 20 and the multiplier 21, and a burst signal portion for generating a burst signal through the sampling circuit 22 and the band pass filter 23, i.e., the multiplexer 11 of the Y signal modulation portion. The Ya (upper line Y) signal and the Yb (lower line V) signal inputted through the two carriers of the color carrier oscillator 19 Times the color subcarrier ^* 2fc gained YQW signal as a signal to the division shown in the Figure 4b appear alternately through the multiplexer 11, the signal is 0 YQW with a low pass filter 12 of the band 0~7.2MHz A Y signal (YQ signal) in a band of ~ 7.2 MHz is obtained, and the C signal is a color carrier carrier fc ^* having a 90 ° phase difference, and is 7,5 MHz through the band pass filter 16 of the mixer 13 and the adder 15. You get a C signal of 9.6 MHz. In addition, the voice signal obtains a modulated voice signal of 9.8MHz to 10.0MHz through the frequency modulator 17 and the band pass filter 18, and the burst signal separates the 1H signal (burst signal through the sampling circuit 22). The phase synchronization signal of the predetermined signal) is separated into the color subcarriers fc ^* to obtain an fc ^* burst signal through the band pass filter 23. The multiplex-modulated YQ / C signal is obtained by summing the obtained signal YQ signal, C signal, voice modulated signal (AU-FM) and burst signal through the adder 24.

Since the YQ signal of the multiplex-modulated YQ / C signal is twice the sampling signal of the Y / C Y signal, it contains twice the video signal, but the first and second YQ / C signals and the YQ / C of FIG. Compared with the C signal, the YQ / C signal uses the same frequency band as the Y / C signal. Therefore, the signal due to the difference between Ya and Yb is compatible with the Y signal as the Y signal (YQ signal) with improved phase transfer characteristics since the phase modulation component in the 0 to 7.2 MHz band is shown in FIG. On the other hand, in order to separate the Ya signal and the Yb signal again, the original yqw signal needs to be restored. In the yq signal, since the YQW signal and the phase modulation component due to the Ya signal and the Yb signal difference are included in the lower waveband, the yq signal has a phase modulated characteristic, and can be restored to the original YQW signal using the characteristics of the YQ signal.

Further YQW signal by dividing the signal so YQW signal created by the signal Ya and Yb to signal a ^* 2fc to split signal into a signal ^* 2fc is removable to the original signal Ya, Yb signal.

However, since the VQ / C signal is a YQ signal, not a VQW signal, and is only a Y signal in the 0 to 7.2 MHz band, in order to recover the YQ signal from the YQ signal, the band removed by the low pass filter 12 of FIG. There is a method and a method for restoring the YQW signal by calculating between the sampling values of the YQ signal.

First, in the method of restoring the band removed by the low pass filter 12, in FIG. 5B, the amplitude modulation component of the baseband 0-fc ^* band by the sum signal of Ya and Yb and the Ya and Yb signal The method can be found in that it can be expressed as the sum of the phase modulation components centered on fc ^* due to the difference.

The Ya and Yb signals are signals in the band 0 to fc ^* ', which are sampled at their own 2fc ^* periods. These signals have a phase difference of 90 ° to each other in the color carrier frequency fc ^* signal band. The YQW signal has a band of 0 to 2 fc ^* and has a phase modulation component of 0 to fc ^{* in} the lower band of the 0 to fc ^* band by the sum of Ya and Yb (YH and YH-parts in FIG. 4a). The upper bands of the bands (YH-part) and the upper bands (YH-part of Fig. 4a) of the bands fc ^{* to} 2fc ^* are obtained by inverse phase bilateral bands. Among the YQ / C signals, only the Y signal (YQ signal) in the 0 to 7.2 MHz band is caused by the low-pass filter 12 due to the difference between the Ya signal and the Yb signal and the amplitude modulation component due to the sum of the Ya and Yb signals. the lower sideband of 0~fc ^* band by the phase modulation components only a portion of the transmission (the degree YH- portion 4a) so fc ^{* *} ~2fc upper side of the phase-modulated signal by the signal difference between the signals Ya and Yb signal constituting the band components If the band is not restored, it cannot be restored by the YQW signal.

On the other hand, in the method of restoring the YQ signal from the YQW signal, the phase modulation component caused by the difference between the Ya signal and the Yb signal in the YQ signal is sampled at 2fc ^* periods at the intermediate position of the sampling position of the Ya signal and the Ya signal. After only obtaining (Fig. 4a), subtract the Y signal separated from the original YQ signal to separate only the phase modulation components due to the signal difference between the Ya and Yb signals, The signal theory of the two side bands compared to the phase modulation is used to convert the frequency of the single sideband (SSB) signal by phase modulation into the other side sideband (SSU) signal Both side bands DBS by phase modulation can be obtained by summing the other side bands from the single side band SSB of the two side bands DSB.

5B is a demodulation circuit diagram showing a demodulation process of a YQ / C signal of the present invention, wherein the multiplexed modulated composite video signal YQ / C separates the YQ signal through a low pass filter 25 and the separated YQ is a sampling circuit. (27) Low pass filter 28, subtractor 29, mixer 30, band pass filter 31, divider 33 and divider 33 divided into 2f _{c *} , low pass filter 34 ( The Y signal demodulation section consisting of 35), the C signal separated through the band pass filter 26 of the YQ / C signal is a C signal demodulation section consisting of a mixer (36) (37), low-pass filter (38) (39), A burst signal demodulator comprising a sampling circuit 40, a band pass filter 41, a color carrier carrier oscillator 42, an ideal phase 43, and a multiplier 44, and a band pass filter 27 of the YQ / C signals. The modulated speech signal is composed of a speech signal demodulator composed of a frequency demodulator 45 and a low pass filter 46, and multiplexed from the modulation circuit of FIG. 2f of the modulated YQ / C signal by the low pass filter 25, the Yb signal of 0 to 7.2 MHz through the sampling circuit 27 and the low pass filter 28, the sampling signal at the intermediate position of the Ya signal and the Yb signal. _{c * A} Y signal (FIG. 4a) is obtained by sampling the period, and this signal is subtracted (Y-YQ) through a subtractor 29 so that 0 to 7.2 MHz of the phase modulation component due to the difference signal between the Ya signal and the Yb signal is obtained. After only the lower band signal of is obtained, the phase modulation component of Ya and Yb in the 10.7 MHz to 17.9 MHz band is passed through the mixer 30 and the bandpass filter 31 using 2f _{c *} as the carrier frequency. When the upper middle band is restored and the original Ya signal and the restored upper band are added through the adder 32, YQW signals in the 0 to 7.2 MHz and 10.7 MHz to 17.9 MHz bands in which the 7.2 MHz to 10.7 MHz bands are not restored. The signal is divided into a divider 33 having 2f _{c *} as a split signal, and divided into a Ya signal component and a Yb signal component.

Since the deficiency of the signal in the 7.2 MHz = 10.7 MHz band is related to the 7.2 MHz or higher signal of the separated Ya signal and the Yb signal, the Ya and Yb signals in the 0 to f _{c *} band are transferred through the low pass filter (34) (35) to 7.2. By removing the high frequency components above MHz, it is possible to separate the faithful Ya and Yb signals from 0 to 7.2MHz.

Figure 5c is another embodiment showing a process of demodulating the YQ / C of the present invention, the unit delay unit (Z ^-1 ) and the YQ signal connected in series through the low-pass filter 25 of Figure 5b and It allows the multipliers _{^{(a _N, a ... N +}} 1 ...), adders (Σ) restore the original YQW signal by calculating to using parts of a digital filter configured to offset the effects of the first 5a-degree low-pass filter 12 to the It is.

In other words, the YQW signal is interpreted as a series of solid wave by sampling, and the square wave sampled through the low pass filter 12 of FIG. The YQW signal, which is a square wave, is interpreted as the sum of the signals spread by the low pass filter 12 of FIG. 5a and interpreted as signals influencing each other adjacent sampling signals, and the center effective value of the shape of the waveform is 1. If the effective value in the adjacent section by one sampling interval is d, any arbitrary square wave can be interpreted as the sum of the waveforms of the dispersion of (d, 1, d) by the low pass filter 12 of FIG. have.

Since the variance is also influenced by adjacent sampling values, the effective value in the waveform through any low pass filter 12 is assumed to be its effective value as Si (dS _i-1 + S _i + dS _i-1 ). Will appear.

The return of the YQW signal from the YQ signal is possible by removing (dS _i-1 + dS _{i + 1} ) by the surrounding sampling device among the effective values of (dS _i-1 + S _i + dS _i-1 ). In this way, the effect of d by the low pass filter 12 can be eliminated by connecting to a delay Z ^-1 having a delay characteristic by the sampling interval and calculating the delayed signal values in different multiples.

That is, if the effective value of the i-th sampling synchronization of the YQ signal passing through the low pass filter 12 of FIG. 5a is S * _i , S * _i by the above variance is S * _i = dS _i-1 + S _i + dS _{i + 1} can be expressed and the arithmetic characteristics of the digital filter can be expressed as a _{_i} S * _i-1 + a ₀ S * _i + a ₁ S * _{i + 1} as (a _-i , a ₀ , a ₁ ) signal of the dispersion of (d, 1, d) are _{(a _1, a 0, a} 1) * through _{(d a_1, da 0 + a} _1, a 0 -d a_1 -da 1, da 0 + a 1, da ₁ ) and if (a _{_1} , a ₀ , a ₁ ) * is (-1,2, -1) *, then the signal of (d, 1, d) is (-d, 2d-1,2 If you get a signal of -2d, -d and (a _{_1} , a ₀ , a ₁ ) * is (-1,3, -1) *, then (-d, 3d-1,3d-2,3d-1,- d), if (a _{_1} , a ₀ , a ₁ ) * is (-d, 1, -d) *, then we obtain (-d ² , 0,1-2d ² , 0, -d ² ), If (a _{_1} , a ₀ , a ₁ ) * = (-d, 1 + 2d, d) *, we get a signal of (-d ² , 2d ² , 1 + 2d-2d ² , 2d ² , -d ² ) .

의 실효치를 갖는 신호들(a_-1,a,a₁)*=(-d,1+2d,-d)*의 (

)의 신호를 얻고자 하는 신호의 성분이 강화된 신호를 얻게 되며 d의 값이

이하이면 그 구분이 좀더 분명해질뿐만 아니라 다른 연산방법을 사용하면 또 다른 특성의 신호를 얻는다.E.g

Signals having an effective value of (a _-1 , a, a ₁ ) * = (-d, 1 + 2d, -d) * of (

You get a signal with enhanced component of the signal you want to get

In the following, the distinction becomes clearer and the signal of another characteristic is obtained by using different calculation methods.

Expanding the calculation range to (a _-N , a _{-N + 1} ,…, a _-1 , a ₀ , a ₁ ,…, a _N-1 , a _N ) * enables more accurate signal correction. By arbitrarily determining the value of a _N , a signal of any characteristic can be obtained.

Thus the Fig. 5c YQ signal separated by a low-pass filter 25 in a unit delay (Z ^-1) to _{S * iN, S * 1-} N + 1, ... via S * _i-1 , S * ₁ , S * _{i + 1} ,... S * _{+ N-1} , S * _{1 + N} and each signal is a _{_N} , a _{_N + 2,.} a _-1 , a ₀ , a ₁ ,... Through a multiplier such as a _N-1 , a _N, etc., an adder Σ is added to obtain a similar signal to the desired YQW, which is separated into a divider 33 using 2f _{c *} as a signal and a signal similar to Ya and Yb. You will get a similar signal to.

In the demodulation process, the C signal and the voice modulated signal in Figs. 5b and c are as much as ΔF, i.e., f _{c *} -f _c (Δ _c = 570fH-227.5fH = 342.5fH) when compared to the conventional NTSC method. Since the frequency is high, that is, the color carrier frequency is f _{c *} , not f _c, only the carrier frequency is different.The C signal is a QM modulated signal with f _{c *} as the carrier frequency, so f _c φ ₁ having a 90 ° phase. And the signals separated by ( _c ) φ ₂ through the band pass filter 26 from the signal element RY and signal BY, and the mixer 36, 37 and the low pass filter 38, 39, respectively. Separation is possible, and the AU-FM is not an existing FM signal of 4.5MHz ± 100KHz but an FM signal of 9.9MHz ± 100KHz, so the FM demodulator differs only from the bandpass filter 27 and the tuning circuit. f _{c *} signal at 45, the low-pass filter by 46) can be demodulated in the audio signal, wherein _{f c · φ 1, f c} · φ 2, f c * signal saekbu carrier frequency oscillator 42 To the ideal state (4 3) through the sampling circuit 40 and the band pass filter 41, the C signal passing through the band pass filter 26 as a 1H signal, obtained through the multiplier 44 and for stable power generation of f _{c *} . The burst signal is sent to the color carrier oscillator 42 to obtain a continuous, stable f _{c *} signal.

In order to drive the demodulated Ya signal and the Yb signal as CRTs, as shown in FIGS. 5d, e, and f, the two Y signals Ya and Yb are formed by the low pass filter 60 and the low pass component of the Y signal. R, G, B signal lines are obtained by the R, G, B matrix circuit 61 by using the (RY) signal and the (BY) signal separated from the C signal as the R, G, B signals. R, G, B, Ya, and Yb lines are coupled to each other through a drive (47-52) in a CRT consisting of six cathodes (KPa, KGa, KBa, KGb, KBb) that will have R, G, B electron guns. In the other CRT, separate R, G, and B signals are applied to the R, G, B caswoods KR, KG, and KB of a common CRT, and Ya and Yb signals are applied to each grid (Gla) (Glb). It is proposed to scan two rows of R, G, B electron beams with luminance signals of R, G, B by wood and grid (Gla, Glb).

Therefore, in the case of a CRT having two columns of R, G, and B cathodes, as shown in FIG. 5E, six drive circuits are formed by a combination of three R, G, B signal lines, two Y lines, Ya, and Yb. -52) is required.

In addition, in the case of a CRT having three cathodes common to R, G, and B and Gla and Gln separated from G, as shown in FIG. 5f, R, G, B signals, Ya, and Yb signals are respectively assigned to the CRT. Convert to required drive circuit 54-58 potential and amplitude and apply to CRT.

12A and 12B illustrate a two-row electron gun of the CRT, an R, G, B cathode, and a two-row grid of the CRT.

Since the YQ / C signal uses the same details as the Y / C signal of the prior application Nos. 59-11342, it is compatible but can be restored to the Y signal, Ya, Yb in two columns because it is a signal multiplexed by two Y signals, Ya, Yb. The effect of 2 times vertical resolution by the 2 line simultaneous scanning method is obtained.

Further, Patent Application No. 89-11342 is a signal obtained by sampling and C signal transfer by f _{c *} having a characteristic of (an integer of about 570) x fH, and a signal range of 0 to 7.2 in which the Y signal band is wider than the existing 0 to 4 MHz. The high-resolution MHz signal and the C signal are adjusted to have the bandwidth of NTSC system using f _{c *} as the carrier frequency, so that the Y signal band and the C signal band are adjusted so as not to overlap the frequency overlap of the existing composite video signal. Generation of cross-noise caused by noise is excluded.

Since the Y / C signal can be modulated with the modulated signal 1b that is compatible with the modulated signal of the existing NTSC method, the modulated signal 1b that can transmit a high resolution video signal while using the existing NTSC transmission network can be obtained. Can be.

6 is a modulation and demodulation circuit diagram in the case of applying the present invention's YQ / C signal to TV 2ch band transmission, and multiplexed 0-10.1MHz YQ / C signal (YQ signal of 0-7.2MHz, YQ signal of 7.5MHz and , C signal of 7.5MHz to 9.6MHz, voice modulation signal of 9.8MHz to 10.0MHz) is composed of a 2ch modulator composed of a local power generation circuit 65, a mixer 66, and a band pass filter 67, The signal is to be demodulated to the original signal YQ / C through a demodulation unit consisting of a local oscillation circuit 72, a mixer 73, and a band pass filter 74. A QY / C signal of 0 to 10.0 MHz is a local oscillation circuit. The modulated signal modulated and modulated as a carrier frequency by 65 obtains a residual side band (VSB) signal in the 12.0 MHz band through the band pass filter 67 (2ch in the TV 2ch band (12.0 MHz). Modulated signal) and the 2ch modulated signal is passed through the mixer 73 at the frequency conversion carrier frequency by the local oscillation circuit 72. After the frequency modulation, the band pass filter 74 obtains the required intermediate frequency signal and demodulates the signal to a carrier frequency to obtain a YQ / C signal of 0 to 10.0 MHz (FIG. 2b).

·색부반송발진기(86), 1H 샘플링회로(88), 혼합기(85), 대역통과필터(87)로 구성된 C 신호 변조부와, 대역통과필터(82), FM 복조기(90), 저역통과필터(91)로 구성된 음성변조부와 가산기(89)로 구성하고 변조된 신호를 복조하는 복조회로는 대역통과필터(93)(94) 각각을 통하여 Y 신호와 C 신호를 분리한 후 FM 복조기(95), 저역통과필터(96), 샘플링회로(100)로 구성하여 Y 신호를 복조하고 혼합기(97),

·색부반송파발진기(98), 대역통과필터(102)로 구성하여 C 신호를 복조하며, FM 변조기(101), 대역통과필터(99)로 구성하여 음성신호를 복조한 후 가산기(103)을 통하여 상기 복조된 Y 신호, C 신호, 음성신호를 가산하여 복조히도록 구성한 것으로, 이들 변복조 과정을 살표보면 다음과 같다.7 is a configuration diagram of a modulation and demodulation circuit when the present invention's YQ / C signal is applied to a VTR recording. The YQ / C signal of 0 to 10 MHz has a low pass filter 80, an FM modulator 83, and a band pass filter 84. Y signal modulator and bandpass filter (81),

C signal modulator consisting of color part carrier oscillator 86, 1H sampling circuit 88, mixer 85, band pass filter 87, band pass filter 82, FM demodulator 90, low pass filter The demodulation circuit comprising a voice modulator (91) and an adder (89) and demodulating the modulated signal separates the Y signal and the C signal through each of the band pass filters (93) (94) and then the FM demodulator ( 95), the low pass filter 96, and the sampling circuit 100 to demodulate the Y signal and to combine the mixer 97,

Demodulate C signal by using color carrier oscillator (98) and band pass filter (102), and demodulate voice signal by using FM modulator (101) and band pass filter (99). It is configured to add and demodulate the demodulated Y signal, C signal, and audio signal, and the modulation and demodulation process is as follows.

The VQ / C signal of 0 to 10.0 MHz uses the YQ signal through the low pass filter 80 of the modulation circuit, and the C signal and the band pass filter 82 of 9.8 MHz to 10.0 MHz through the band pass filter 81. After separation by voice FM, the YQ signal is modulated by FM signal of synchronization level (9.2MHz) and back level (12.0MHz) through FM modulator 83 and is black level, FM frequency of pedestal level is C signal. Is the carrier frequency for low-pass conversion, so that the purified frequency and phase of the low-frequency conversion carrier frequency oscillation circuit 86 of the C signal during the period of the pedestal level are applied to the Y-FM signal using the 1H signal separated from the Y signal. In this demodulation, a burst signal for accurately reproducing the frequency conversion oscillation frequency of the C signal can be obtained in synchronization with the 1H signal. Therefore, the frequency conversion carrier frequency of the C signal is precisely phase-synchronized by the burst signal, thereby maintaining a stable and stable C signal frequency. Obtain the conversion carrier frequency.

·(f_c*=570fH로 하면 10.09MHz)가 페데스탈레벨의 FM 주파수가 되도록 하면, C 신호 주파수 변환반송주파수에 의해 저역변환된 C 신호는

·(71.25fH, 1.12MHz)을 반송주파수로 한 0.5MHz-2.6MHz 대역의 신호를 얻고 이 신호를 대역통과필터(87)을 통해 가산기(89)에 가하여 영상신호기록을 위한 회전헤드에 가하고 Y-FM 신호는 C 신호와 중첩을 퍼하기 위해 BPF(84)를 통해 9.2MHz-12.0MHz의 FM 변조신호의 고주파 통과대역을 2.9MHz∼13.5MHz로 제한하여 가산기(89)에 가해 C 신호와 함께 회전헤드에 가한다.The C signal is low-pass converted through the mixer 85 and the band pass filter 87 by the C signal frequency carrier frequency to convert the C signal frequency conversion carrier frequency.

If (f _{c *} = 570 fH, 10.09 MHz) becomes the FM frequency of the pedestal level, the C signal low-converted by the C signal frequency conversion carrier frequency

Obtain a signal in the 0.5MHz-2.6MHz band with (71.25fH, 1.12MHz) as the carrier frequency and apply this signal to the adder 89 through the bandpass filter 87 to the rotating head for video signal recording. The FM signal is added to the adder 89 along with the C signal by limiting the high pass band of the 9.2 MHz to 12.0 MHz FM modulated signal through the BPF 84 to 2.9 MHz to 13.5 MHz to spread the overlap with the C signal. Applied to the rotating head.

In case of VRT, the low frequency S / N ratio is very bad and the control signal is provided for accurate tracking. Therefore, the voice FM signal cannot be used, and the low frequency filter 91 can be FM demodulated by the FM demodulator 90. Only the audio signal is obtained by passing through and the signal is recorded in a separate voice track through the fixed head.

2C is a diagram showing a frequency distribution of a signal applied to the rotating head of the VTR obtained as described above.

The demodulation of the YQ / C signal from the VTR signal proceeds in the reverse order of the modulation process in FIG. 7b, and the bandpass filter having the respective bandwidths for the low-converted C signal and the FM-modulated Y-FM signal included in the rotating head. After separation into (93) (94), the Y-FM signal is passed through the FM demodulator 95 to pass the low pass filter 96 with a bandwidth of 0 to 7.2 MHz to obtain the YQ signal, and the C signal to the 1H signal. In order to apply the phase signal of the frequency conversion carrier frequency of the C signal, i.e., the pedestal level separated by the Y-FM signal to the frequency conversion oscillation circuit of the C signal, the burst signal is transmitted through the sampling circuit 100 by the 1H signal. The signal is applied to the C signal frequency conversion carrier frequency oscillation circuit 98 through the band pass filter 70 to obtain an accurate C signal frequency conversion carrier frequency, and the signal is mixed with the mixer 97 and the band pass filter 99. The low-converted C signal through the original C signal band Frequency conversion, and adds the YQ / C signal through the YQ signal and the adder 103, and the voice FM signal reproduces the voice signal by a separate fixed head in a separate voice track, or transmits a voice circuit, or YQ To add a voice FM signal to the / C signal, the voice signal is restored to the voice FM signal through the FM modulator 101 and the bandpass filter 102, and the adder 103 adds the demodulated signals to form a complete YQ / C signal. Can be obtained.

FIG. 8 is a circuit diagram showing midnight demodulating and demodulating the present invention with a VDP. FIG. 7 shows the same configuration as in the case of VRT, but obtains an FM modulation and a C signal frequency conversion carrier frequency. By converting the signal by the frequency conversion carrier frequency, low-converted C signal and voice FM signal of 0.1MHz ~ 2.6MHz is obtained, and this signal is added together with the Y-FM signal to add the FM signal to the low-frequency C signal and the voice FM signal. When the potential is converted, a slice is formed at the intermediate position so that the Y-FM signal generates PWM (pulse width modulation) by the low-converted C signal and the voice FM signal. This allows recording and transmission to VDF and fiber optics.

In FIG. 8A, the YQ signal and the bandpass filter are passed through the low pass filter 80 to separate the input YQ / C signal into a YQ signal of 0 to 7.2 MHz, a C signal of 7.5 MHz to 10.0 MHz, and an audio FM signal. Through 104, the signal is separated into a C signal and a voice FM signal.

The processing of the YQ signal is the same as those in FIGS. 7a and b, except that the C signal and the voice FM signal in the 7.5 MHz to 10.0 MHz band are converted to the C signal frequency conversion carrier frequency through the mixer 105 and the band pass filter 106. Therefore, a low-converted C signal and a voice FM signal of 0.1 MHz to 2.6 MHz are obtained.

The Y-FM signal, the low-converted C signal, and the voice FM signal are added by the adder 107 in order to convert the Y-FM signal according to the low-converted C signal and the voice FM signal at the intermediate potential position. 108), the Y-FM signal is PWM-modulated by the duty width conversion by the C signal and the voice FM signal, which are low-converted, and the optical pulse signal for optical communication with VDP is converted into electric energy-optical conversion. (109) (110).

Such a signal includes both the Y-FM signal by the YQ signal, the C signal, and the voice FM signal in one optical pulse signal, so that the recording of the VDP and the transmission of the optical fiber are possible with one optical pulse signal.

·f_c*반송주파수는

·f_c*발진회로(98)에 Y-FM 신호에서 샘플링회로(100)를 통해 1H 신호로 주파수 변환을 위한 버스트 신호를 대역통과필터(70)을 통하여 얻고, C 신호 및 음성 FM 신호는 대역통과필터(114)를 통해 저역의 신호 성분만 통과시킴으로써, 튜티폭변조(PWM)에 의한 저역의 진폭성분을 복원하여 Y-FM 신호는 FM 복조기(95)와 저역통과필터(96)를 통하여 YQ 신호로 복원하고, 저역변환된 C 신호 및 음성 FM 신호는 C 신호 주파수변환발진회로에서의 C 신호 주파수 변환발진주파수로 주파수 변환하기 위해 혼합기(115)와 대역통과필터(116)를 통과시켜 본래의 7.5MHz∼10.0MHz의 C 신호 및 음성 FM 신호로 복원하여 가산기(117)를 통해 복원된 YQ 신호와의 합으로 완전히 YQ/C 신호를 만든다.In the case of demodulation, the optical pulse signal is converted into an electrical signal by the optical-electric energy converters 111 and 112 of FIG. 8, and the signal is selected through the slice 113, and thus the original band of the Y-FM signal, that is, 2.9. The bandpass filter 93 of 1 MHz to 13.5 MHz is passed to remove the high frequency components by the low-converted C signal and the Y-FM signal by the voice FM signal, and the low-converted C signal and the voice FM signal are converted into the original frequency band. To convert

F _{c *} carrier frequency

· F _{c *} the burst signal for frequency conversion to the 1H signal to the oscillation circuit 98 in the Y-FM signal over the sampling circuit 100 is gained through a band pass filter (70), C signal and an audio FM signal band By passing only the low-pass signal components through the pass filter 114, the low-frequency amplitude components due to the duty-width modulation (PWM) are restored so that the Y-FM signal is YQ through the FM demodulator 95 and the low pass filter 96. The C signal and the voice FM signal, which are converted into a signal, and the low-converted C signal and the voice FM signal, are passed through the mixer 115 and the band pass filter 116 to convert the frequency into the C signal frequency conversion oscillation frequency in the C signal frequency conversion oscillation circuit. Reconstructing the C signal and the voice FM signal of 7.5 MHz to 10.0 MHz to make the YQ / C signal completely by the sum of the reconstructed YQ signal through the adder 117.

9 is a modulation and demodulation circuit diagram in which a modulated signal according to the present invention is applied to SHF or satellite communication transmission, and the frequency band used in the case of SHF or satellite communication is very high, ranging from several GHz to several tens of GHz. Because the distance is very far, wideband signal transmission band is allowed more than terrestrial broadcasting to prevent S / N ratio from falling due to weak signal.

The Asian region has a bandwidth of 27 MHz, and the bandwidth of 27 MHz is twice the bandwidth of the 13.5 MHz Y-FM signal and the 2d bandwidth of the low-converted C and voice FM signals.

Therefore, when the signal of FIG. 2d having a bandwidth of 0 to 13.5 MHz is doubled, a signal having a bandwidth of 27 MHz can be obtained. In the case of satellite communication, a method of multiplying a modulated signal by a predetermined ratio is multiplied, and when receiving, it divides by a multiplied ratio and demodulates the original signal.

Signals used for satellite communication should be transmitted with signals with suppressed amplitude modulation components. Since the amount of signals received from each other is very small, it is difficult to realize a good S / N ratio due to noise. Because.

Therefore, the signal that can be used for satellite communication is the Y-FM signal is pulse width modulated (PWM) by the low-conversion C signal and the voice FM signal, such as the modulation of optical signal to VDP or optical fiber among the 2D diagram signals. An integrated signal can be used as an FM modulated signal, but the limitation is that the signal must be a front wave FM signal having a bandwidth of 27 MHz, not an unlimited high frequency signal such as an optical signal.

Therefore, in the transmission phase for satellite communication, it must be transmitted through a band pass filter (BPF) that will limit the bandwidth to 27MHz.

Therefore, the modulation circuit of SHF or satellite communication has the same configuration as that of the VDP and the optical oil modulation / demodulation circuit of FIG. 8 and the PWM modulation through the slice 108, and the modulated signal is local oscillator circuit 118 and mixer 119. ), Band pass filter 120, multiplier 121, band pass filter 122, local oscillation circuit 123, mixer 124, band pass filter 125, antenna 126, demodulation circuit In addition, the VDP and optical communication demodulation circuit of FIG. 8 and the demodulation through the slice 113 are configured in the same manner, and the band pass filter 127 and the local oscillation circuit 128 are reversed from the antenna 126 to the modulation circuit. ), Mixer 129, band pass filter 130, divider 131, band pass filter 132, local oscillator circuit 133, mixer 134, band pass filter 135, slice 113 It consists of.

The modulation and demodulation circuit configured as described above PWM-modulates the Y-FM signal by the low-conversion C signal and the voice FM signal in the slice 108 through the same process of modulating the VDP and the optical fiber of FIG. After the local oscillation circuit 118 and the band pass filter 120 of the mixer 119 are modulated into the intermediate frequency band, the signal is converted into a multiplying intermediate frequency signal through the multiplier 121 and the band pass filter 122. And increase or widen the modulation width and the intermediate frequency band by multiplication to generate a basic signal for the SHF or satellite communication, and convert the signal into a local oscillation circuit 123 and the mixer 124 for frequency conversion to the SHF or satellite communication signal. The bandpass filter 125 converts the signal into the SHF or satellite communication signal to the antenna 126 as shown in FIG.

The signal transmitted as described above is demodulated through the antenna 126. The mixer, which is a frequency conversion oscillation frequency of the band pass filter 127 and the local oscillation circuit 128, is converted into an SHF or satellite communication signal received through the antenna 126. 129 and a band pass filter 130 to convert the frequency into a multiplying intermediate frequency signal, and then modulate the intermediate frequency signal through the divider 131 and the band pass filter 132 into an original intermediate frequency signal. The intermediate frequency signal from the oscillation circuit 133 is applied to the mixer 134 to demodulate the signal in FIG. 2d through the band pass filter 135, and then to the demodulation process of the VDP and the optical fiber through the slice 113. Through the demodulation to the YQ / C signal.

In this way, the YQ / c signal can be applied to TV 2ch band modulation, conversion of recording VDP and optical fiber signals of VTR, modulation signal of SHF or satellite communication signal, etc. and other compatible with existing NTSC system in TV 1ch band. Modulation is possible with a modulation signal capable of transmitting a high resolution video signal.

The method of modulating the Y / C signal into a modulated signal that can be compatible with the existing NTSC modulated signal and can be a high resolution video signal major is described by the method of Priority No. 89-11342 (F _{c *} - By modulating the Y / C signal with two carrier frequencies with a carrier frequency difference of f _c ), the difference of P in its overlapping band is due to the difference of P _{c *} signal to f _c (3.58MHz), NTSC-based color carrier signal. The Y signal of 4.2MHz ~ 7.2MHz, that is, Y ^{(1/2) H} signal, is modulated around the carrier frequency which modulated the 0 ~ 4.2MHz band of Y signal while obtaining a signal compatible with the existing NTSC modulation signal. In addition to the frequency insertion method with a 0.5fH difference, a higher resolution video signal is transmitted than the conventional NTSC method.

Figure 11a shows the frequency spectrum by the Y / C modulation method of the prior application No. 89-11342. In this method, since the sampling period during demodulation is the frequency insertion method by the Y signal, which is twice as high as that of the conventional NTSC method, Signals in the 2.1MHz to 4.2MHz band of the superimposed Y signal have a larger amount of phase modulation due to amplitude modulation than the NT signal of the conventional NTSC method. Inflows can be foreseen.

As a method of preventing the inflow of the cross noise, a method of suppressing the influence of the phase modulation component by the amplitude modulation component by sampling on the Y signal in the 2.1 MHz to 4.2 MHz band should be taken. In this method, it is possible if the Y signal of 2.1MHz to 4.2MHz in the transmission band by sampling becomes the high-frequency signal, but the Y signal of 2.1MHz to 4.2MHz in the Y / C method is 0f to 2f _{c *} sampling periods. _It is never a high-band signal in the _{c *} transmission band. If we look at f _{c *} as 570fH, the signal of 0 ~ f _{c *} means 0 ~ 8.97MHz.

를 기준으로 상대적으로 고역의 신호가 되게 함으로써 샘플링에 의한 진폭변조에 의한 위상변조 성분의 양이 억제되어 C 신호와 중첩된 Y 신호간의 크로스 잡음의 유입의 양을 억제할 수 있다.Therefore, in order for the Y signal of 2.1MHz to 4.2MHz superimposed on the C signal to be a relatively high frequency signal, the sampling signal is set to f _{c *} which is 1/2 lower than the existing 2f _{c *} and the Y signal of 2.1MHz to 4.2MHz 0 to

By making the signal into a relatively high range, the amount of phase modulation component due to amplitude modulation by sampling can be suppressed, and the amount of cross noise between the C signal and the overlapped Y signal can be suppressed.

In this method, a signal of the band of the Y signal of 4.2 MHz to 7.2 MHz, that is, the Y signal ^{(1/2) H} signal and the C signal using f _{c *} as the carrier frequency, and the separate Y signal of 0 to 4.2 MHz, is represented by f _{c. * Is} sampled again and the phase modulation component is suppressed to overlap with the previous Y ^{(1/2) H} signal and C signal by the method of frequency interpolation. A transmission method that reduces the amount of cross-noise influx between the signal and the Y signal is possible.

로 반송주파수로 한 위상변조 신호로 역위상의 양측파대 중 하측파대는 0∼4.2MHz 대역의 Y 신호의 재차 1/2 샘플링으로 제거된 것과 Y^(1/2)H신호에 양측파대중 상측파대가 있는 신호의 합으로 표시될 수 있다.In demodulation, since the Y signal of 0 to 4.2 MHz is sampled again in the period of f _{c *} , as shown in FIGS. 5B and C, the original signal YQW is a half-sampled Y signal and Ya and The sum of the signals having both side bands of the phase-modulated signal reverse phase due to the difference of Yb. Here, the Y signal is also caused by the phase modulation component due to the difference between the 1/2 sampled Y1 / 2 signal and the even Y signal of the 2N th sampling and the radix Y signal of the 2N + 1 th sampling.

The lower side bands of the two phase bands in the reverse phase with the phase carrier signal at the low carrier frequency were removed by half sampling of the Y signal in the 0 to 4.2 MHz band and the upper side bands of the two side bands to the Y ^{(1/2) H} signal. It can be expressed as the sum of the signals.

Therefore, the removal of the lower band from the phase-modulated signal by half sampling with f _{c *} of the Y signals in the 0 to 4.2 MHz band is frequency converted from the Y signal in the 4.2 MHz to 7.2 NHz band, that is, the Y ^{(1/2) H} signal. You can restore it by adding it.

10 is a circuit diagram for demodulating and demodulating a Y / C signal into a 1ch modulated signal and a 1ch modulated signal into a Y / C signal. That is, the C signal, the audio FM signal using the YH signal and f _{c *} as the carrier frequency, and the Y signal of 0 to 4.2 MHz through the low pass filter 140 of No. 89-11342 are modulated with ΔF to 4.2 MHz to 9.6. A sampling circuit 142 having a sampling period of f _{c *} is added to the mixer 144 and the band pass filter 146 which have been frequency-converted to the band of MHz, and a Y-signal of 0 to 4.2 MHz is generated by the low pass filter 140. 1 _c modulates the Y ^{(1/2) H} signal that has passed through the band pass filter 141 by applying the signal to the mixer 144 and the band pass filter 146 having ΔF as the carrier frequency. As a result, a spectrum as shown in FIG. 11B is obtained.

During demodulation, the 1ch modulated signal 11b of 4.2 MHz to 10.0 MHz is transmitted through the band pass filter 150 to the 4.2 MHz to 9.6 MHz video signal and the band pass filter 151 to the voice FM of the 9.8 MHz to 10.0 MHz band. After separating the signal into a signal through the band pass filter 150 through the 1H signal circuit 152 to the ΔF signal of the pedestal level and the burst signal of the color transfer signal of f _{c *} higher than △ F than conventional f _c In order to apply this signal to each oscillation circuit, the bandpass filters 153 and 154 are separated into ΔF and f _{c *} components, and the ΔF signal is then applied to the ΔF oscillation circuit 155 by an f _{c *} signal. is f _{c *} oscillation is applied continuously to the circuit 156, to be made and a stable oscillator signal to obtain a f _{c *, c *} 2f obtains the signal of this signal via the multiplier 157.

반송주파수의 위상변조신호중 하측파대신호(Y^(1/2)H-)를 복원하여 저역통과괼터(161)를 통한 0∼4.2MHz의 Y^1/2신호를 f_c*를 반송주파수로 한 혼합기(162)로 주파수변환하여 7.5MHz∼9.6MHz의 대역통과필터(163)를 통과시킴으로써 C 신호 대역에 포함된 Y^1/2신호 성분만으로 복원한후, 대역통과필터(150)를 통한 Y 신호와 C 신호가 중첩된 신호에서 감산기(164)를 통해 Y^1/2신호를 상쇄하여 7.5MHz∼9.6MHz 대역의 대역통과필터(165)를 통과시켜 f_c*를 반송주파수로 한 C 신호만을 얻는다.The Y ^1/2 signal of FIG. 4C frequency-converts the signal through the low pass filter 150 to the ΔF signal in the ΔF oscillation circuit 155 through the mixer 155 to 0 through the low pass filter 159. create a signal of ~4.2MHz, the signal f _{c * c *} f of the oscillation circuit to the signal by one-half the sampling by the sampling circuit 160 of 0~4.2MHz through a low pass filter (161) Y ^{1 The / 2} signal is modulated by ΔF of the T signal included in the Y ^{(1/2) H} signal by the sampling circuit 166 and the bandpass filter 167 in the period f _{c *} through the low pass filter 150. to remove the signal of ~2.1MHz, and frequency converted to a _* f _c the carrier frequency of f _{c *} oscillation circuit passes through a band-pass filter 169 of the band 1.8MHz~4.2MHz this signal via a mixer 168. 0 The difference between the even-numbered Y signal and the odd-numbered Y signal read by sampling the Y signal of ˜4.2 MHz again with f _{c *}

The phase modulation of the carrier frequency sinhojung lower sideband signal (Y ^{(1/2) H-)} mixing a signal of a Y ^1/2 0~4.2MHz through a low-pass goelteo 161 to restore the carrier frequency f _{c *} in The frequency conversion is performed at 162 to pass through the bandpass filter 163 of 7.5 MHz to 9.6 MHz to recover only the Y ^1/2 signal components included in the C signal band, and then the Y signal through the band pass filter 150. In the superimposed signal, the Y ^1/2 signal is canceled through the subtractor 164 and passed through the bandpass filter 165 in the 7.5 MHz to 9.6 MHz band to obtain only the C signal having f _{c *} as the carrier frequency.

These signals Y ^1/2 signal, Y ^{(1/2) H} signal, Y as shown in Figure 4c the ^{- (1/2)} Y ^H in a restored signal ^{(1/2) H-} signal, Y ¹ Y / C signal is obtained by adding all C signals canceling the ^{/ 2} signal through the adder 170, and the voice FM signal through the bandpass filter 151 is also added through the adder 174 to complete Y / C signals. Get

The voice signal is demodulated to the voice signal through the FM demodulator 171 and the low pass filter 172 through the band pass filter 151 as necessary.

In the demodulation circuit of the 1ch modulated signal to the Y / C signal shown in FIG. 10B, the circuit excluding the mixer 162 and the band pass filter 163 is a demodulation circuit of the Y / C modulated signal of No. 89-11342. The mixer 162 and the band pass filter 163 are circuits for canceling the signal change by the sampling circuit 142 of the 1ch modulation circuit (FIG. 10a).

The Y ^{(1/2) H-} signal of 1.8 MHz to 4.2 MHz recovered by the mixer 162 and the bandpass filter 163 of FIG. 10B has a Y ^{(1/2) H-} signal of 4.2 MHz to 7.2 MHz. Since a part of the high range of the Y signals in the 0 to f _{c *} band is removed, the Y ^{(1/2) H-} signal of 0 to 1.8 MHz cannot be restored.

The Y / C signal due to this unrestored signal (FIG. 4d can be used as it is when there is no difficulty in practical use, but when fixed is necessary, the frequency characteristic is adjusted through the band attenuator 171.

In FIG. 10A, only a method of obtaining a signal of 4.2 MHz to 10.0 MHz is illustrated as a modulation method of a signal height of 1ch band, but the frequency difference of the signals of the low pass filter 140 and the band pass filter 141 is ΔF, respectively. Modulation at the carrier frequency can provide a 1ch band modulation signal (Y / C modulation signal or 1ch modulation signal) in an arbitrary frequency band in the overlapping band.

Although any frequency band signal can be used in the 1ch band modulated signal (Y / C modulated signal or 1ch modulated signal) recovery method, the use of a band of 4.2 MHz to 10.0 MHz has advantages in simplification and reliability of the signal.

샘플링주기의 색신호(C)를 재현하기 위해서는 YQ/C신호 또는 Y/C신호, Y^1/2Q/C 신호에서의 C 신호 대역이 전송가능한 색신호보다 2배의 색신호가 필요하며 이것은 1필드전의 색신호와 엇위치로 결합시킴으로 YQ/C신호(Y/C 신호, Y^1/2Q/C 신호 포함)에 의하여 전송되는 C 신호보다 2배의 색해상도를 달성할 수 있다.In addition, the Y signal (Ya signal and Yb signal) in the 2-line 0 to 7.2MYHz band of the YQ / C signal and the Y signal

In order to reproduce the color signal C of the sampling period, the C signal band in the YQ / C signal or the Y / C signal and the Y ^1/2 Q / C signal requires twice as many color signals as the color signal that can be transmitted. By combining the color signal in the opposite position, twice the color resolution of the C signal transmitted by the YQ / C signal (including the Y / C signal and the Y ^1/2 Q / C signal) can be achieved.

sec이므로 1H 지연의 경우와 같이 압전소자를 이용한 아날로그 신호 전송에 의한 지연은 불가능하다.In this case, one field delay of C signal is inevitable, and the time to be delayed is approximately equal to one field period.

Since it is sec, delay by analog signal transmission using piezoelectric element as in the case of 1H delay is impossible.

Therefore, after converting an analog signal of a video signal into a digital signal using a memory, the digital signal is stored in a digital memory as digital data, and after one field, the digital data is restored to an analog signal and the original color signal (RY) and (BY) signals Combined by a multiplexer, you get twice the color resolution.

When the video signal is generalized and the Y signal in addition to the C signal such as the (RY) signal and the (BY) signal is stored in the digital memory, the Y signal and the C signal are stored by the digital memory. Therefore, only the digital memory is stored without the input signal. Image signals can be reproduced.

When integrating the Y and C signals into one data format, the ratio of the sampling periods of the Y and C signals is 5: 1, and the C signal is divided into two color elements, such as the (RY) and (BY) signals. As a result, the data ratio of the Y signal and the C signal is 5: 2.

If this is 1 block and the low frequency component of the five Y signals, that is, the low frequency component of the Y signal, is taken once in the same manner as the C signal sampling, the data ratio of the low frequency components of the Y signal, the C signal, and the Y signal of the data format is 5; When each component is interpreted as 4 bits of data: 2: 1, 5 dots of a single color can be represented by 32 bits.

)이 되게 정의할 수 있다.If the Y signal is defined as the common signal of five Y signals, that is, the low-pass signal (Y _L ) of five Y signals, and the difference signal, the five-dot Y signal (YΔ), the Y signal is one Y _L data and five. Y △ data and the relationship is Y ← Y _L × (1+

) Can be defined as

)의 관계에 의해 7비트의 분해능의 Y 신호의 표면이 가능하므로 그 유용성이 매우 크다.If the Y signal is composed of one Y _L data and five Y data, a Y signal having only 4 bits of resolution is combined with one common Y _L data and Y ← Y _L × (1+

), The Y signal surface with 7-bit resolution is possible, so its usefulness is very large.

Thus (RY) by defining a signal and the (BY) signal also in conjunction with Y _L data (RY) signal ← Y _L × (RY) data, (BY) signal ← Y _L × (BY) data, (RY) data In addition, 4K (K = 1024) color expressions can be expressed by the common Y _L data with 4 bits of resolution (BY) data.

)의 관계와, (R-Y) 신호←Y_L×(B-Y), (B-Y) 신호←Y_L×(B-Y)의 관계를 가지는 영상신호의 A/D컨버터 및 D/A 컨버터 구성도를 나타낸 것으로, 제13a도는 디지탈의 영상데이타를 아날로그의 영상신호로 만들기 위한 영상신호의 D/A 컨버터회로의 구성도이다.13a, b is Y ← Y _L × (1+

) And the (RY) signal ← Y _L × (BY), (BY) signal ← Y _L × (BY), which shows the A / D converter and D / A converter configuration diagram. FIG. 13A is a block diagram of a D / A converter circuit for video signals for converting digital video data into analog video signals.

The D / A converters 180 to 183 are configured to convert each of the four bits of YΔ data, Y _L data, (RY) data, and (BY) data into analog signals, and the D / A converter 181 in the Y _L data. The Y _L signal converted into an analog signal is converted into the (RY) signal ← Y _L × (RY) data, and the (BY) signal ← Y _L × (BY) data via the D / A converter 182 (183). The analog signal is converted into a (RY) signal and a (BY) signal.

)의 관계의 신호로 만들기 위해 승산기(184)에 의해 Y 신호를

Y△로 변환하여, 가산기(185)를 통해 (1+

)의 신호로 만든후 색신호와 마찬가지로 D/A 컨버터(181)을 통해 얻는 Y_L신호를 승산기(186)를 통하여 연산함으로써, Y←Y_L×(1+

)의 신호를 얻을 수 있다.The Y signal is an analog signal of 4 bits of Y data through the D / A converter 180. Y _L × (1+

The Y signal by the multiplier 184 to make it a signal of

Converted to YΔ, and through the adder 185 (1+

) And then calculate the Y _L signal obtained through the D / A converter 181 through the multiplier 186 as in the color signal, whereby Y ← Y _L × (1+

) Signal can be obtained.

)의 신호로 변환하여, 이 신호를 승산기(194)(198)(199)에 가해, Y 신호, (R-Y) 신호, (B-Y) 신호를 Y△ 데이타, (R-Y) 데이타, (B-Y) 데이타로 변환하기 위한 레벨변환을 한 후 (R-Y)데이타, (B-Y) 데이타 경우는 A/D 컨버터(200)(201)를 통해 디지탈데이타의 (R-Y) 데이타, (B-Y) 데이타로 변환하며, Y△ 데이타는 승산기(194)를 통한 신호를 가산기(195), 레벨변환기(196)을 통하여 Y←Y_L×(1+

)의 관계를 가진 신호로의 변환이 되게끔 레벨변환을하여 A/D 컨버터(197)을 통해 Y△ 데이타로 변환하도록 구성한다.In the conversion of the analog signal to digital data, as shown in FIG. 13B, the Y signal is passed through the low pass filter 190 to obtain only the low pass component of the Y signal, and then the A / D converter 191 is converted into this signal. Y _L signal through the conversion to the Y _L data of 4 bits, configuring Y _L data so as to again obtain a Y _L signal quantized through a D / a converter 192 and inputs this signal via a function generator (193) Inverse of

), And add this signal to multipliers 194 (198) and (199) to convert the Y signal, the (RY) signal, and the (BY) signal into Y △ data, (RY) data, and (BY) data. After the level conversion for conversion, (RY) data and (BY) data are converted into (RY) data and (BY) data of digital data through the A / D converter 200 and 201, and Y △ data The signal through multiplier 194 is added to adder 195 and level converter 196 by Y ← Y _L × (1+).

A level conversion is performed so that a signal is converted into a signal having a relationship of?) And is converted to Y? Data through the A / D converter 197.

Although there is a difference in signal between the Y _L data, the (RY) data, the (BY) data, and the Y △ data due to the sampling period difference, Y △, that is, the serial port of the serial port of the dual port RAM called Y △, 5 consecutive Y △ data. By enabling the enable terminal sequentially with the Δf _{c *} signal, a YΔ data signal with a 5-fold speed can be obtained.

)로 Y_L데이타를 정의하는 경우, 동일한 데이타만으로도 광범위한 레벨에서의 영상표현이 가능하다.When the characteristic of YΔ data is used as a representative value of a nonlinear function, for example, Y ← 2 ^{(Y / 4)} _L × (1+

In the case of defining Y _L data with), image expression at a wide range is possible even with the same data alone.

It 1og the Y _L signal from the Y _L data in Fig claim 13a ₂ ^{YL / 4} inverse of, log ₂ ^{YL /} having ^four functions of the function generator 207, and the second 13b degrees reciprocal function generator (193) Y _L Considering the conversion of the data to the log ₂ ^{YL / 4} signal, the inverse function generator is needed in the Y _L data converted to log ₂ ^{YL / 4} , so it is replaced by the function generator 209 of the log _2- ^{(YL / 4)} function. An A / D converter and a D / A converter circuit are needed.

) 특성의 D/A 컨버터 회로 및 A/D 컨버터회로를 나타낸 것으로, 제14a도는 Y←log₂ ^YL/4×(1+

)와, (R-Y) 신호 Y←log₂ ^YL/4×(R-Y) 데이타 (B-Y) 신호←log₂ ^YL/4×(B-Y) 데이타의 영상신호로 변환하기 위해 Y_L데이타를 D/A 컨버터(181)로 아날로그 신호로 변환된 것을 log₂ ^YL/4기능의 함수발생기(203)를 통하여 log₂ ^YL/4신호를 얻도록 구성하여 이 신호를 제13a도의 승산기(186)(187)(188) 기능의 제14a도의 승산기(204)(205)(206)에 가해 Y←log₂ ^YL/4×(1+

)와 (R-Y) 신호←log₂ ^YL/4×(R-Y) 데이타, (B-Y) 신호←log₂ ^YL/4×(B-Y) 데이타의 기능의 신호를 얻는다.14a, b is Y ← log ₂ ^{YL / 4} × (1+

) Shows a D / A converter circuit and an A / D converter circuit, and FIG. 14A shows Y ← log ₂ ^{YL / 4} × (1+

) And Y _L data to the D / A converter to convert the (RY) signal Y ← log ₂ ^{YL / 4} × (RY) data (BY) signal ← log ₂ ^{YL / 4} × (BY) data into a video signal. 181) to obtain a log ₂ ^{YL / 4} signal through a function generator 203 having a log ₂ ^{YL / 4} function, and convert the signal to a multiplier 186 (187) (188) of FIG. 13A. In addition to multipliers 204, 205 and 206 of FIG. 14A of the function, Y ← log ₂ ^{YL / 4} × (1+

) And (RY) signal ← log ₂ ^{YL / 4} × (RY) data, and (BY) signal ← log ₂ ^{YL / 4} × (BY) data.

)와 (R-Y)←log₂ ^YL/4×(R-Y) 데이타, (B-Y) 신호←log₂ ^YL/4×(B-Y) 데이타의 관계를 가지는 디지탈데이타의 Y_L데이타, Y△ 데이타, (R-Y) 데이타, (B-Y) 데이타로 변환하기 위한 A/D 컨버터 회로의 구성으로, 저역통과필터(190)을 통과한 Y 신호의 저역성분을 log₂ ^-(YL/4)의 함수발생기(210)을 통하여 비직선특성의 양자화된 Y_L신호를 얻으며, 이 신호를 제13b도의 승산기(194)(198)(199)에 해당하는 승산기(211)(215)(216)에 가해, 상기 승산기(211)에서의 신호를 가산기(212)와 레벨조정기(213)을 통해 레벨 조정한 후 A/D 컨버터(214)를 통해 Y△ 데이타가 얻어지도록 구성시키며, (R-Y) 데이타는 승산기(214)의 신호를 A/D컨버터(217)를 통해 얻고, (B-Y) 데이타는 승산기(216)의 신호를 A/D 컨버터(218)를 통해 얻는다.Figure 14b shows the Y signal, the (RY) signal, and the (BY) signal from Y ← log ₂ ^{YL / 4} × (1+).

) And Y _L data, Y △ data, (RY) of digital data having a relationship between (RY) ← log ₂ ^{YL / 4} × (RY) data and (BY) signal ← log ₂ ^{YL / 4} × (BY) data. A / D converter circuit for converting data into (BY) data. The low pass component of the Y signal passing through the low pass filter 190 is passed through the function generator 210 of log _2- ^{(YL / 4)} . A nonlinear linearized quantized Y _L signal is obtained, which is applied to multipliers 211, 215 and 216 corresponding to multipliers 194, 198 and 199 of FIG. Level is adjusted by the adder 212 and the level adjuster 213, and Y? Data is obtained through the A / D converter 214. The (RY) data converts the signal of the multiplier 214 to A. The / D converter 217 obtains the (BY) data from the multiplier 216 through the A / D converter 218.

)를 얻기 위한 레벨변환의 방법은 Y의 신호를 1/8로 레벨변환한후 제13,14a도의 승산기(184)에 1에 해당하는 레벨을 더함으로써 제13,제14a도의 가산기(185), Y 신호에서 (1+

) 신호를 얻기 위한 레벨변환을 Y 신호에서 Y△ 데이타를 얻기 위해서는 Y△ 신호를 얻어야 하는데 그 방법으로는 Y 신호와 양자화된 Y_L신호와의 연산 및 레벨변환으로 Y△ 신호를 얻는다.In Y △ signal (1+

The method of level conversion to obtain a) is to add the level corresponding to 1 to the multiplier 184 of FIGS. 13 and 14a after level converting the signal of Y to 1/8, and the adder 185 of FIGS. 13 and 14a, At the Y signal (1+

In order to obtain YΔ data from the Y signal, a YΔ signal must be obtained. As a method, a YΔ signal is obtained by calculating and leveling the Y signal and the quantized Y _L signal.

) 특성의 신호에서 Y△ 신호로의 레벨변환을 하여 A/D 컨버터(197)(214)로 Y△ 데이타를 얻는다.The arithmetic signal between the Y signal obtained in the multiplier 194 in FIG. 13B and the multiplier 211 in FIG. 14B and the quantized Y _L signal is added through the adders 195, 212, and level converters 196, 213 (1). +

A / D converters 197 and 214 obtain YΔ data by performing level conversion from a signal having a?) Characteristic to a Y? Signal.

FIG. 15 shows the overall configuration of the CRT display that realizes twice the color resolution as the digital memory using the YQ / C signal and obtains the image of twice the vertical resolution by the simultaneous scanning of two lines using the conventional NTSC scanning method. As shown in FIG. ¹ , in order to obtain an audio signal from a YQ / C signal (YC signal, Y ^1/2 Q / C signal), the band pass filter 27, the FM demodulator 45, and the low pass filter 46 are used. The circuit for obtaining the YQW signal separates only the YQ signal in the 0 to 7.2 MHz band from the YQ / C signal through the low pass filter 25 and then divides the YQ signal by the method of Figs. 5b and c. The signal is recovered from the signal to the YQW signal, and the separation of the C signal and the demodulation of the (RY) signal and the (BY) signal are performed using a known method through the bandpass filter 26, 7.5 MHz to 9.6 MHz. F _{c *} signal obtained from the f _{c *} oscillation circuit 42 is converted to the phase shifter 43 and f _c having a phase difference of 90 ° from each other. _With φ ₁ and f _c φ ₂ , the mixer (36) (37) and the low pass filter (39) (41) are separated into a signal (RY) and (BY), and known for stable oscillation of f _{c *} . The phase-synchronized signal fc _* is obtained by applying the 1H signal obtained by the method to the sampling circuit 40 to obtain a burst signal of frequency f _{c *} , and applying it to the f _{c *} oscillation circuit 42 through the band pass filter 41. This signal is obtained through the phase shifter 43, f _c φ ₁ and f _c φ ₂ and the multiplier 228 to obtain a 4 f _{c *} signal.

4f _{c *} is required for the signal of FIG. 15 using the dual port ram because 4f _{c *} signal is required to obtain 5 YΔ by the serial enable shift division method, and the 2f _{c *} signal uses the divider 230. Get 2f _{c *} through

The YQW signal obtained by the method of Figs. 2b and c is input to the multiplexer 220 and the A / D converter circuit (Y signal of Figs. 13 and 14a and separated by the mixers 36 and 37 and the (RY) signal and (BY). The signals are also input as the (RY) signal and the (BY) signal of the multiplexers 225 and 226 and the A / D converter circuit, respectively.

분주의 분주기(231)로 분주한 신호에 의하여 YQ/C 신호에서의 (R-Y) 신호와 (B-Y)와, 디지탈메모리에서의 (R-Y)데이타, (B-Y) 데이타를 D/A컨버터(제13,제14b도를 통하여 아날로그 신호와 한것을 주기적으로 분할하며, 이 신호에 의하여 2배의 색해상도를 달성한다.Outputs of the Y signal, (RY) signal, and (BY) signal in the D / A converter circuit according to FIGS. 13 and 14b are another port of the multiplexer 220, (RY) signal and (BY) in the case of the Y output signal. ) Output signals are respectively input to another port of the multiplexers 225 and 226, and in the case of the Y signal, the YQ / C signal and the selection signal (WE signal) for selecting an image signal by the digital memory. (RY) and (BY) signals to 2f _{c *} signals

The signal divided by the divider 231 divides the (RY) signal, the (BY) signal from the YQ / C signal, the (RY) data from the digital memory, and the (BY) data into the D / A converter (13th). By periodically dividing the analog signal from the one shown in Fig. 14B, the signal achieves twice the color resolution.

The output signal from the multiplexer 220 is applied to a divider 221 and a low pass filter 224 for obtaining low pass components of the Y signal, and the divider 221 is divided into Ya and Yb using a 2f _{c *} signal as a split signal. The low-pass filter 222, 223 removes a part of the high frequency and the high frequency generated during the division and returns to the two Y signals Ya and Yb of 0 to 7.2 MHz. Through the diagrams, two-line simultaneous scanning can be applied to the CRT.

In addition, the color signal is obtained by only the low-pass component of the Y signal through the low pass filter 224 among the (RY) and (BY) signals through the multiplexers 225 and 226 and the YQW signal through the multiplexer 220 and R, G. R, G, and B signals are obtained through the B matrix 227 and applied to the CRT via the drive stage.

The A / D converter circuits (Yb data of 4 bits of output signals in Figs. 13 and 14b, 4 bits of (RY) data, 4 bits of BY data, and 4 bits of YΔ data) are respectively used in a 3-state buffer ( In addition to the 233, 234, 235, and 236, the three-state buffers 223, 234, and 235 of Y _L data, (RY) data, and (BY) data are divided into multiplexers 225 and 226. A 0.4f _{c *} signal, which is an output signal of 231, is applied to process twice the color resolution, and a multiplexer 220 is applied to the tri-state buffer 236 of the YΔ data by applying a selection signal WE of the multiplexer 220. ), The Y △ data is stored in the digital memory.

Y △ data is sequentially divided by a serial enable shift divider 229 with one block of 32 bits of Y Y data, which is 5 times faster than Y _L data, (RY) data, and (BY) data. Y data transmission becomes possible.

Another port of the digital port dual port RAM 232, that is, the normal port is connected to the processor for processing the image data and co-processor to enable arbitrary video signal processing by the software method by the program, 1 By moving the data of the C signal before the field for twice the color resolution, a high resolution video signal can be obtained without adding hardware.

If the input signal is not a YQ / C signal or a Y / C signal or a Y ^1/2 Q / C signal, the selected signal WE may be adjusted and input to obtain a memory of the image and a video signal having a double resolution. Since the video signal is stored in the dual port RAM, frame-to-frame calculation and editing can be performed by a software method by a processor or a co-processor.

Therefore, the present invention not only uses high resolution Y / C and Y / C signals as Y ^1/2 Q / C signals, but also transfers to 1ch band and multiplexes of Y / C signals to YQ / C signals. For transmission of 2ch band with / C signal, recording of VTR, recording of VDP and transmission of optical fiber by optical signal, modulation of SHF or satellite communication signal, data format for recording to digital memory and video signal conversion By providing A / D converter and D / A converter at the same time, it is possible to use a variety of signals, and by adhering to the existing NTSC scanning method and presenting a display device that can get up to twice the vertical resolution by 2 line scanning method. In the conventional NTSC transmission method, it is possible to transmit high resolution video signals with modulated signals (Y / C modulated signals and 1ch modulated signals) compatible with NTSC modulated signals. Multiplexed, double vertical It provides the transmission system of intermediate stage Y / C and Y ^1/2 Q / C with high resolution signal diagram that can obtain high resolution, and YQ / C signal is compatible with Y / C signal or Y ^1/2 Q / C signal. Since this signal is multiplexed by two lines of Y signals (Ya and Yb), it is possible to reproduce twice the vertical resolution, and the realization method uses the conventional NTSC scanning method while simultaneously using the two-line scanning method. As a method of achieving double vertical resolution, the transmission system of the present invention can be directly or indirectly compatible with the existing NTSC method, and the conversion device does not require line accumulation of a video signal. In addition, high resolution video signals can be reproduced by adding some additional circuits to the existing NTSC system.

In addition, since the method of using the YQ / C signal is the same as that of the prior application No. 89-11342, a separate device is not required. The method also includes a modulation method for satellite communication. It is available.

Although there is a slight difference in the method of using the Y / C signal, it is converted into a signal that can be switched with each other, so that distortion of the signal due to the conversion can be reduced.

Here, a method of recording and reproducing images by digital memory is also presented, so that arbitrary image processing by a processor and a co-processor is possible, and this signal can be reproduced by a signal having the highest resolution of a YQ / C signal. do.

Claims (11)

The Y / C signal, which is a composite video signal of the TV, is received through the two lines of the multiplexer 11 as the Ya signal and the Yb signal, and the Yaf signal and the Yb signal are alternately displayed as a split signal using a 2f _c ^* color carrier which is doubled. A YQW signal, which is twice the band of the Y signal, is obtained, and the YQW signal is modulated into a multiplexed YQ signal through a low pass filter 12 in the 0 to 7.2 MHz band, and the mixers 13 and 14 receive the above (20). Modulate the carrier frequency f _c ^* ø _1, f _c ^* ø ₂ with 90 ° phase difference, and modulate it into C signal of 7.5MHz ~ 9.6MHz through adder (15) and bandpass filter (16). (17) modulating a 9.8 MHz to 10.0 MHz voice FM signal through a band pass filter 18 and adding the modulated signals in an adder 24 to modulate a YQ / C signal in a 0 to 10.0 MHz band; process to the YQ / c sinhojung re-sampling cycle of the color sub-carrier 2f _c * a YQ signal from low pass filter 25, the sampling circuit 27 is modulated in a low After the Y signal is obtained through the pass filter 28, the Y signal is subtracted from the subtractor 29 to obtain only the difference signal to the lower wave, and then, through the mixer 30 and the band pass filter 31, 10.7 MHz to 17.9 MHz. Restoring the upper band of the band, and adding the YQ signal and the upper band in the adder 32 to obtain the YQW signal of which the bands of 7.2 MHz to 10.7 MHz are not restored as 0. to 7.2 MHz and 10.7 MHz to 17.9 MHz band signals. In the divider 33, the signal is divided into a Ya signal and a Yb signal, and restored through the low pass filters 34 and 35 to a Ya signal and a Yb signal from which a high frequency component of 7.2 MHz or more is removed. Modulation and demodulation method of the next Y / C that can be double-row scanning by using the demodulation process to restore the inverse of the modulation process. The method of claim 1, wherein the unit delay (Z ^-1 ), the multiplier (a _-N , ... a _-1 , a ₀ having a unit time delay characteristic in restoring the YQ signal output in the modulation process to the demodulation process A multiplexing / demodulation / modulation method of multiplexing Y / C, capable of reconstructing a YQW signal similar to the 0 to 7.1 MHz and 10.7 MHz to 17.9 MHz bands as a digital filter composed of, a ₁ , ... a _N ) and an adder (Σ). The YQ / C signal of 0 to 10.0 MHz is modulated to the mixer 66 at the carrier frequency by the local oscillation circuit 65, and the 2ch modulated signal of the 12.0 MHz band is transmitted through the band pass filter 67. The 2ch modulated signal is demodulated to a carrier frequency by demodulating the signal of the intermediate frequency band at the carrier frequency through the local oscillation circuit 72, the mixer 73, and the band pass filter 74 so as to be demodulated to the YQ / C signal of 0 to 10.0MHz. Modulation / demodulation method of multiplexed Y / C capable of double row scanning to enable transmission. The YQ / C signal of 0 to 10.0 MHz is separated into a Y signal, a C signal, and an audio signal through the low pass filter 80 and the band pass filter 81, 82, respectively. The signals are modulated through the FM modulator 83, mixer 85, FM demodulator 90, 1H sampling circuit 88, band pass filters 84 and 87, and low pass filter 91 and added to the adder 89. ) And applying each modulated YQ / C signal and voice signal to the rotating head of the VTR, and the modulated YQ / C signal and voice signal from the rotating head of the VTR are modulated in the reverse order of the modulation process. A multiplexing / demodulation method of multiplexing Y / C capable of double-column scanning in which a YQ / C signal is demodulated into an original YQ / C signal. The YQ / C signal of 0 to 10.0 MHz is separated into a Y signal, a C signal, and an audio signal through the low pass filter 80 and the band pass filter 81, 82, respectively. Signals are FM modulator 83, mixer 85, FM demodulator 90

Modulated through the 1H sampling circuit 88, the bandpass filter 84, 87, and the lowpass filter 91, each of which sampled the color carrier of f _c * in the 1H signal period, and summed with the adder 89, respectively. Obtains the YQ / C signal and the voice signal of the PWM signal through the slice 108, and the PWM signal is changed by the duty width change. The modulated signal is converted into the optical converter 109 and 110 for the VDP and the optical fiber. After recording and transmitting through the photoelectric conversion, the electrical signal converted by the electrical converters 111 and 112 is photo-electrically converted to select the electrical signal through the slice 113, and then modulated in the reverse order of the modulation process. A multiplexing / demodulation method of multiplexing Y / C capable of double-column scanning in which a YQ / C signal is demodulated into an original YQ / C signal. The YQ / C signal of 0 to 10.0 MHz is separated through the low pass filter 80 and the band pass filter 81, 82, respectively, and then the Y signal, the C signal, and the audio signal are respectively separated. The signals of the FM modulator 83, mixer 85, FM demodulator 90,

f _c * of oscillator (86)

f _c * slices then combined with the sampled color subcarrier cycle 1H sampling signal 1H sampling circuit 88, bandpass filter 84, 87, respectively, modulated by the low-pass filter 91 and the adder 89 of the The PWM modulated YQ / C signal and the voice signal according to the duty width change through the local oscillator 118, the mixer 119, the band pass filter 120, the multiplier 121, and the band pass filter 122 through the 108. ), The local oscillator 123, the mixer 124, the band pass filter 125, and the antenna 126. The signal received by the antenna 126 on the receiving side is a band pass filter 127, a local oscillator ( 128), the mixer 129, the band pass filter 130, the branching unit 131, the band pass filter 132, the local oscillator 133, the mixer 134, the band pass filter 135 after demodulation A multiplexing / demodulation / modulation method of multiplexing Y / C capable of two-column scanning to demodulate the original YQ / C and audio signals through a slice (113) through the recording and transmission of the VDP and the optical fiber. Input Y / C signal through band pass filter 141, Y signal in 4.2MHz ~ 7.2MHz band, Y ^{(1/2) h} signal, _C signal with fc * as carrier frequency, audio FM signal and Sampling f _c * to the mixer 144 and the band pass filter 146 which modulated the Y signal of 0 to 4.2 MHz to ΔF through the low pass filter 140 and then frequency-converted to the band of 4.2 MHz to 9.6 MHz. A sampling circuit 142 having a period is added, and the Y ^{(1/2) H} signal and the C signal, the voice FM signal, and the adder 147 through the band pass filter 141 are added to a 1ch modulation of 4.2 MHz to 10.0 MHz. And a 1MHz modulation signal of 4.2MHz to 10.0MHz modulated in the 1ch modulation process through a band pass filter 150, 151 for a video signal of 4.2MHz to 9.6MHz and an audio FM of 9.8MHz to 10.0MHz. After separating the signal and the ΔF signal and f _c * components of the band pass filter 153, 154 through the 1H sampling circuit 152, the ΔF signal is oscillating circuit 155, f _c * oscillation signal is f _c * And continue on to 156, to obtain a stable oscillation, gets the 2f _c * signal through a multiplier 157, the band pass a signal through the filter 150, mixer 158, low pass filter 159, the sampling The circuit 160 obtains the Y ^1/2 signal through the low pass filter 161, and transmits the signal through the band pass filter 100 through 2f _c * sampling circuit 166 and the band pass filter 167. Obtaining a ^{(1/2) H} signal, modulating the Y ^{(1/2) H} signal into an f _c * color carrier through the mixer 168 with an f _c * signal, and then a lower band through the band pass filter 169. The signal Y ^{(1/2) H−} is restored, and the Y ^1/2 signal is passed through the mixer 162 and the bandpass filter 163 to subtract the Y ^1/2 signal including the C signal band. 164) is passed through a band-pass filter 165 of the 7.5MHz~9.6MHz band offset ^1/2 Y signals via a f _c * saekbu obtain only the C signal to the carrier frequency, these signals Y ^1/2, Y ( ^1/2 H, Y ^{1/2 ″-} , C signal through adder 174 Acquire the Y / C signal completely, and if necessary, demodulate the audio signal through the band pass filter 151, the FM demodulator 172, and the low pass filter 173 so that the Y / C signal can be demodulated to 1ch. Modulation / demodulation of one Y / C signal. R, G, B matrix circuit 61 and R, G, B cathode to obtain two Ya, Yb signals and C, RY, BY signals through R / G and B signal lines The wood is composed of two rows and combined with R, G, B and Ya, Yb through the drive 47-52, or R, G, B signals are applied to the cathodes KR, KG, KB of CTR, A display device of a multiplexed Y / C signal capable of two-column scanning, wherein the Yb signal is applied to each grid (Gla) (Glb) to scan the R, G, and B signals by the cathode and the Y signal by the grid in two columns. The YQ / C signal multiplexed through the modulation process is demodulated into YQW, BY, and RY signals, and the demodulated YQW, BY, and RY signals are multiplexers 225 and 226 and multiplexer 220. The R, G, B signals are obtained through the low pass filter 224, the R, G, and B metrics 227, and two rows are scanned to the CRT through the drive stage, but the YQW, BY, and RY signals are analog signals. The A / D and D / A converter circuits, the three-state butters 223-236, and the multiplexer 220 apply a WE signal to convert the data and the digital data into analog data. The image signal in the memory can be selected, the 2f _c * signal is applied to the divider 221 to be separated into Ya and Yb, and the 0.4f _c * is added to the multiplexers 225 and 226 to input twice the color resolution. A serial enable shift component that blocks the output data of the divider 231, the A / D converter circuit, and the three-state buffers 233-236 A display apparatus for a Y / C signal capable of double-row scanning, which is configured to perform double-row scanning on a CRT using a double port ram (232) for sequentially dividing, storing, and transmitting as a splitter (229). 10. The D / A and A / D converter circuits according to claim 9, wherein the D / A and A / D converter circuits are converted into Y / Y data, Y _L data, RY data, and BY data of 4 bits and converted into Y data. Data (

1/8 multiplier 184, an adder 185, and a multiplier 186 that multiplies the Y _L data and converts it into a Y signal, and converts the converted RY data and BY data into analog signals. Multipliers 187 and 188 for converting to (RY) and (BY), and converting the Y signal into Y _L data and Y data through a low pass filter 190 and an A / C converter 191. converted to Y _L data, and the Y _L data, the D / a converter 195 and the function generator 193 and an adder 195. the Y signal from the multiplier 194 for multiplying 8t multiplier 196, and a / D The converter 197, and the (RY) signal and the (BY) signal are composed of (RY) and (BY) through respective A / D converters 200 and 201 to enable Y / Y scanning. C signal display device. 10. The Y / D converter data of the D / A and A / D converter circuits is converted into Y through the D / A converter 180, the 1/8 multiplier 184, the adder 185, and the multiplier 204. The Y _L data is converted into a 2 ^{(YL / 4)} signal through the D / A converter 181 and the 2 ^{(YL / 4)} function generator 203, and each of the (RY) and (BY) data The D / A converters 182, 183, and multipliers 205, 206 are converted to BY and RY, respectively, and the Y signal is a low pass filter 190 log ₂ ^{YL / 4.} , the function generator (207), Y converted to the _L signal configuration but Y △ signal is the Y _L signal to the D / a converter 209, a multiplier 210 and a multiplier 211 via an a / D converter 208, The adder 212, the 8 multiplier 213, and the A / D converter 214 are configured to convert the Y data, and the (RY) and (BY) signals are respectively multipliers 215, 216 and the converter ( 217) and (218) display devices for Y / C signals capable of double-row scanning configured to be converted into (BY) and (RY) data.

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