KR100202572B1 - Dual picture processor for a vcr - Google Patents

Abstract

The present invention V to goenhan dual screen processing unit of the CR, in the prior art, a color phase that is, the phase of the f _sc of because placed according to the vertical synchronizing at V CR servo field memory is needed but two color video signals (CVBS) twisted Because of this, there is a problem that processing cannot be performed on color image signals. Accordingly, the present invention is simple in overall circuit implementation by synchronizing the phase of the color signal reproduced in V-Cal with the vertical synchronization of the signal coming from the tuner and the color phase of the color signal so that only the luminance signal and the color signal can be processed in the redundant processing. To reduce the price of components.

Description

VRT's dual screen processing unit

1 is a circuit diagram of a conventional dual screen processing apparatus of VR.

FIG. 2 is a detailed circuit diagram of the dual screen processor of FIG.

3 is a control pulse waveform of each part in FIG.

4 is a circuit diagram of the dual screen processing apparatus of the present invention VRC.

5 is a detailed block diagram of the dual screen processor of FIG.

6 shows the characteristics of the band pass filter and the color signal spectrum before and after the mixer.

* Explanation of symbols for main parts of the drawings

51a, 51b: analog / digital converter 52a, 52b: luminance / color signal separator

53a, 53b, 54a, 54b: compression unit 55a, 55b: delay unit

56a, 56b: mixer 57a, 57b: band pass filter

59a: horizontal synchronization matching unit 62: signal generating unit

63: selection switch 64: digital / analog converter

1000: tuner 2000: intermediate frequency processing unit

3000: Synchronous separation and dispensing unit 4000: Regeneration unit

5000: dual screen generation unit 6000: color phase synchronization unit

The present invention relates to a dual-screen processing device of a VR, and in particular, a digital signal by processing on a color image signal (CVBS) without using a field memory and performing a dual-screen processing method on Y, U, and V for vertical synchronization. It is related to the dual-screen processing device of V-Cal that the processor (DSP) is not only simplified but overall, but also the price is reduced when the circuit is implemented.

In the prior art, the dual-screen processing apparatus of BC-RA is a content previously filed by the present applicant (967 patent in 1996). As shown in FIG. 1, a high frequency signal received from an antenna ANT is tuned to a corresponding broadcast channel frequency. A tuner 101 for outputting; An intermediate frequency processor 102 for outputting a signal CVBS1 obtained by extracting a video intermediate frequency and an audio intermediate frequency of the broadcast signal tuned and input from the tuner 101; The vertical synchronous separation unit 103a for separating the 50 Hz vertical synchronous signal from the signal CVBS1 extracted and separated by the intermediate frequency processing unit 102, and the vertical synchronous signal separated by the separation unit 103a are divided by 1/2. A synchronous separation and divider 103 comprising a divider 103b for outputting a 25 Hz vertical synchronous signal; Servo 104a for controlling the video signal of the tape to be read in synchronism with the drum and the crest system 104b in the vertical synchronization provided by the synchronous separation and divider 103, and the control of the servo 104a. A playback unit (104) comprising a VRL playback unit (104c) for receiving a video signal reproduced through the drum and the thxton and outputting a signal (CVBS2) extracted by video and audio intermediate frequencies; The dual screen generation unit 105 generates two screens by receiving the signal CVBS1 input from the intermediate frequency processing unit 102 and the signal CVBS2 input from the playback unit 104.

As shown in FIG. 2, the dual screen generation unit 105 includes the video signal CVBS1 input from the intermediate frequency processing unit 102 and the video signal CVBS2 input from the recording / reproducing unit 104. As shown in FIG. First and second picture processing units 105a and 105b for decoding the decoded signals and performing digital conversion and time compression on the decoded signals to separate them into left and right pictures; A horizontal synchronization matching unit 105c for delaying the output signal of the second screen processing unit 105b for a predetermined time in order to match the phase of the luminance signal and the chromaticity signal processed by the first screen processing unit 105a; The clock signal CLK1 CLK2 generated by the second screen processor 105b, the switch control pulse SW-CP generated by the switching means, and the horizontal synchronization signal H1 are generated by receiving the image signal CVBS1. A horizontal synchronous separation and pulse generator 401, a horizontal synchronous separation unit 402 for separating and outputting a horizontal synchronous signal H2 from the input video signal CVBS2, and the horizontal synchronous separation and pulse generation unit ( A signal generator for matching the horizontal synchronization signals H1 and H2 generated by the 401 and the horizontal synchronization separator 402, respectively, and controlling the horizontal synchronization matching unit 105c with the matched signal HC-CP. A control signal generation section 105d consisting of 403; The output signal of the first screen processing unit 105a is divided into 1 / s during the 1/2 cycle according to the horizontal synchronous separation of the control signal generator 105d and the switch control pulse SW-CP generated by the pulse generator 401. A selection switch 105e for selecting and outputting image data of the horizontal synchronization matching unit 105c for two periods; A digital / analog converter 501 for converting video data transmitted from the selection switch 105e into an analog video signal, and an output signal of the digital / analog converter 501, and the encoded video signal ( It consists of an output part 105F which consists of an encoding part 502 which outputs CVBS).

In addition, the first screen processing unit 105a separates the input TV image signal CVBS1 into a digital chroma signal having the luminance signal Y1, the image component U1, and the quadrature component V1, and the separated signal. A first signal separation and decoding unit 201 for decoding and outputting the signal into a signal suitable for a broadcasting method; A first analog / digital converter 202 for converting the luminance signal and the chromaticity signal of one channel obtained by the first signal separation and decoding unit 201 into digital image data Y1 ', U1', and V1 and outputting the converted digital image data; Wow; A first time of outputting a chroma signal having a luminance signal Y1, an in-phase component U1, and an orthogonal component V1 obtained by 1H compression of the digital image data converted by the first analog / digital converter 202; It consists of a compression part 203.

In addition, the second screen processor 105b may have a second signal separation and decoding unit 301, a second analog / digital converter 302, and a second time compression unit similar to the first screen processor 105a. 303) to output to the horizontal synchronous matching section 105c.

Looking at the prior art configured as described above in detail.

First, when a high frequency signal is transmitted through the antenna ANT, the tuner 101 receives the tuner 101 and tunes to the desired broadcast signal to provide it to the intermediate frequency processor 102.

Accordingly, the intermediate frequency processing unit 102 extracts and separates an image intermediate frequency and an audio intermediate frequency from the broadcast signal and provides the separated signal CVBS1 to the dual screen generator 105 and the synchronous separation and division unit 103, respectively. do.

Accordingly, the vertical synchronizing section 103a of the synchronizing separation and dividing section 103 separates the vertical synchronizing signal V-SYNC of 50 Hz from the signal CVBS1, and the vertical synchronizing signal of 50 Hz in the divider 103b. Is divided into two and the signal divided by the two divided into the frequency of 25Hz is output to the reproducing unit 104.

In the servo 104a of the recording / reproducing section 104, the drum and the capstan system 104b are controlled to read the video signal of the tape in synchronization with the vertical synchronizing signal V-SYNC coming from the tuner 101. give.

Therefore, the video signal read from the tape of V-Cal becomes the signal CVBS2 having the video and audio intermediate frequency via the V-Cal reproducing unit 104c, and is transmitted to the dual screen generating unit 105.

Then, the dual screen generation unit 105 receives the video signal CVBS1 transmitted from the intermediate frequency processing unit 102 and the video signal CVBS2 transmitted from the VR playback unit 104c, decodes each of them, and then digitally converts them. And outputting and displaying the video signals generated by time compression to the desired left and right screens, that is, the composite video signal CVBS made of the dual screens.

That is, the dual screen generating unit 105 will be described in detail with reference to the details shown in FIG. 2 and the pulse waveform diagram shown in FIG.

First, the video signal CVBS1 as shown in (a) of FIG. 3 processed by the intermediate frequency processing unit 102 and the video signal CVBS2 as shown in (b) of FIG. 3 processed by the recording / playback unit 104 are obtained. The first and second signal separation units 105a and 105b of the first and second signal processing units 105a and 105b are respectively input to the decoders and the decoders 201 and 301, respectively.

The first and second signal separation and decoding units 201 and 301 of the first and second screen processing units 105a and 105b are configured to output luminance signals Y1 and Y2 and in-phase components from different input image signals. (U1) (U2) and chroma signal signals having orthogonal components (V1) and (V2) are separated, and the separated signals are decoded for input to the second and second analog / digital converters 202 (302). In this case, the first and second analog / digital converters 202 and 302 are digital image data, i.e., a digital luminance signal Y1 (Y2) and an in-phase sequence U1 '(U2') with respect to an analog image signal. ) And a quadrature component (V1 ') (V2') are converted into digital chromaticity signals and output to the first and second time compression units (203, 303).

In the compression and output of the digital luminance signal and the digital chromaticity signal inputted to the first and second time compression units 203 and 303, the original 1H is 64. signal with sec is 32 The signals Y1 and Y2 (U1 and U1) (V1 and V2) are reduced to sec.

The signal of the first screen processing unit 105a among the reduced digital luminance signals and chromaticity signals is provided to the H terminal of the selection switch 105e.

At this time, the horizontal synchronous separation and pulse generator 401 of the control signal generator 105d receives the image signal CVBS1 and separates the horizontal synchronous signal H1 as shown in (C) of FIG. 403 and the switch control pulse SW-CP and the first and second screen processing units 105a and 105b as shown in FIG. 3E for controlling the selection switch 105e. The clock CLK1 for adjusting the conversion time of the second analog / digital conversion unit 202 and 302 and the clock CLK2 for adjusting the compression time of the first and second time compression units 203 and 303 are provided. To generate.

In addition, the horizontal synchronizing separator 402 separates the horizontal synchronizing signal H2, as shown in (d) of FIG. 3, by attaching the video signal CVBS2 provided from the recording / reproducing unit 104. 403).

Accordingly, the signal generator 403 controls the horizontal synchronous matching unit 105c with the horizontal synchronous signal H1 and H2 input from the horizontal synchronous separation and pulse generator 401 and the horizontal synchronous separation unit 402, respectively. Generates a horizontal synchronous control pulse (HC-CP). That is, the same pulse as in (bar) of FIG. 3 is generated.

Then, the horizontal synchronization matching unit 105c has a digital luminance signal Y2 and an in-phase component U2 and an orthogonal component V2 output from the second time compression unit 303 of the second screen processing unit 105d. A digital chromaticity signal having a digital luminance signal (Y1), an in-phase component (U1), and an orthogonal component (V1) and an NXJ output to the first time compression unit (203) of the first screen processing unit (105a) by receiving the digital chromaticity signal; It is necessary to adjust the phase, which is achieved by controlling the horizontal synchronous control pulse HC-CP generated by the signal generator 403.

That is, the selection switch 105e is delayed by delaying the digital chroma signal with the digital feedback signal Y2 and the image component U2 and the orthogonal component V2 by the period which is high in the pulse waveform as shown in FIG. Output to L terminal of.

Then, the selector switch 105e switches to the H terminal during the period of high in the waveform diagram as shown in (e) of FIG. 3 to select the output signal of the first screen processing unit 105a, and to the L terminal during the period of low. Selects the output signal of the second screen processing unit 105b and outputs the output signal to the output unit 105f. The video signal CVBS1 side signal is selected in the 1/2 section, which is the high section, as the H1 section of sec, and the video signal CVBS2 side signal is selected and output in the 1/2 section, which is the high section.

The output signal is converted into an analog chromaticity signal having analog luminance signal Ya and analog in-phase component Ua and analog quadrature component Va through digital / analog converter 501 of output unit 105f. Then, the encoder 502 outputs the color image signal CVBS as shown in FIG. 3 (G).

In this way, two screens can be configured so that one TV can be watched simultaneously on one screen and the BC channel on the other screen.

In addition, according to the user's preference, two screens or one screen can be freely selected and viewed.

In the present invention, the frequency f _o of the vertical synchronization is 25Hz in the arm (PAL) method, 30Hz in the NTSC (NTSC) method is to be used, it can be used without distinction between the arm method and the NTS method.

However, since the vertical synchronization is set in the conventional VR servo of the prior art as described above, the field memory is not required, but the color phase of the two color video signals CVBS, that is, the phase of the subcarrier frequency fac is shifted. Processing cannot be performed on the video signal. The reason is that the phase of the color signal reproduced in the VCAL is reproduced at the subcarrier frequency fsc which is free-run inside the VCAL.

Accordingly, an object of the present invention is to reduce the price by simply implementing a digital signal processor (DSP) by matching the color phase of two color image signals (CVBS) and processing them on a color image signal (CVBS) or luminance / color. In addition, it provides a dual screen processing apparatus of VRC to improve the reliability.

In order to achieve the above object, the configuration of the dual screen processing apparatus according to the invention of the present invention is to convert and amplify a high frequency broadcast signal that is tuned and input from a tuner into a first color video signal of an intermediate frequency, as shown in FIG. Intermediate frequency processing means for outputting; Synchronous separation and division means for separating the vertical synchronization signal from the first color image signal output from the intermediate frequency processing means and dividing the separated signal for output; Reproducing means for reading and outputting a video signal whose phase is synchronized with the vertical synchronous signal when outputting the vertical synchronous signal outputted from the synchronous separating and dividing means to the video tape in synchronization therewith; The sub-carrier frequency f _sc is reproduced from the first color image signal output from the intermediate frequency processing means, and the color phase of the video signal reproduced by the reproduction means is reproduced using the reproduced frequency f _sc . Color phase synchronizing means for outputting a second color image signal in synchronization with the color phase of the signal; The first color image signal of the intermediate frequency processing means and the second color image signal output from the color phase synchronizing means are synchronized with the phase of the vertical synchronization subcarrier frequency (f _sc ) signal to be adjusted according to the aspect ratio of the desired screen. And combines them into a dual screen generating means for generating two screens.

As shown in FIG. 5, the dual-screen processing means includes a first compressed first image which is compressed by half after performing analog / digital conversion and signal separation on the first color image signal input through the tuner. A first screen compression means for outputting a color image signal and a second color image signal inputted from V-CAL, and then compressing the signal to 1/2 and compressing the first color image signal with horizontal synchronization. A second screen compression means for outputting a two-color image signal, a horizontal synchronous signal receiving the first color image signal and a second color image signal, and a switch control pulse and a horizontal synchronous control pulse signal according to the separated horizontal synchronous signals; A control signal generating means for generating a signal and a compressed first color video signal or a compressed second color video signal according to a control signal generated from the control signal generating means as a selected analog signal. Constitute a display control means for pills to control the output to the double screen appears.

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

As shown in FIG. 4, the dual-screen processing apparatus of the present invention includes converting and amplifying a high frequency broadcast signal input and tuned from the tuner 1000 to a first color video signal CABS1 having an intermediate frequency. An intermediate frequency processor 2000 for outputting; Receives the first color image signal CVBS1 output from the intermediate frequency processing unit 2000, separates the vertical synchronization signal from the vertical synchronization separator 3000a, and divides the separated vertical synchronization signal from the division unit 3000b. A synchronization separating and dividing unit 3000 which divides two and outputs this divided vertical synchronization signal; The video signal of the tape is sent to the drum and capstan system 4000b so that the V-Cal tape can be read out in synchronization with the synchronizing signal output from the synchronizing separation and dispensing unit 3000, and the image signal of the tape is perpendicular to the first color image signal CVBS1. A reproduction unit 4000 made of a servo 4000a for reading and outputting a video signal whose phase is synchronized with the synchronization; A subcarrier frequency renewal unit 6000b which reproduces a subcarrier frequency f _ac from the first color image signal CVBS1 output from the intermediate frequency processor 2000, and the subcarrier reproduced by the subcarrier frequency reproduction unit 6000b. A color for synchronizing the color phase of the color signal read out from the VR using the frequency f _{ac with} the color phase of the first color image signal CVBS1 and outputting the synchronizing second color image signal CVBS2. Phase synchronization 6000; Four color video signal CVBS1 and second color video signal CVBS2 in which the phases of the vertical synchronization and the subcarrier frequency (f _ac ) are synchronized are input and adjusted according to the aspect ratio of the desired screen. The dual screen generator 5000 outputs a signal CVBS to generate two screens.

As shown in FIG. 5, the detailed block diagram of the dual screen generator 5000 converts the first color image signal CVBS1 input through the tuner into a digital signal and outputs the digital signal. 51a, a luminance / color signal separator 52a for receiving the signal output from the converter 51a and outputting the signal separately from the luminance signal Y1 and the color signal C1, and the separator 52a. and the first and the second compression unit (53a) (54a) to 1/2 with respect to the compressed luminance signal (Y1) and a color signal (C1) outputted from, the output of f _sc of the second compression unit (54a) Compensating the shifted phase by multiplying the main mixer (56a), and the bandpass filter (57a) for removing unnecessary components from the color signal output through the mixer 56a and outputs the removed signal (C1 ') and And a delay unit 55a for delaying and outputting the luminance signal Y1 'as much as the color signal C1' is delayed while passing through the band pass filter 57a. A first screen for generating and outputting a compressed first color image signal CVBS1 consisting of an adder 58a that adds the luminance signal Y1 'of the edge 55a and the color signal C1' of the bandpass filter 57a. A compression unit 5000a; The second color image signal compressed by the horizontal synchronization matching unit 59b for adjusting the horizontal synchronization of the first and second color image signals CVBS1 and CVBS2 to the same configuration as the first screen compression unit 5000a. A second screen compression unit 5000b for generating and outputting CVBS2 '); Receiving the first color image signal CVBS1 input to separate the horizontal synchronous (H1), and generates a switch control pulse signal generated by the horizontal synchronous separation and pulse generator 60, and the second color image signal ( Horizontal synchronous separator 61 for receiving and outputting horizontal synchronous H2 by receiving CVBS2), and horizontal synchronous H1 generated by the horizontal synchronous separator and pulse generator 60 and horizontal synchronous separator 61; A control signal generator 62 composed of a signal generator 62 for receiving the H2 and generating a horizontal synchronous control pulse signal HC-CP; A selection switch for selecting one of the first color image signal CVBS1 'or the second color image signal CVBS2' compressed according to the switching control pulse signal SW-CP input from the control signal generator 5000c; 63) and a screen control unit 5000d including a digital / analog converter 64 for converting and outputting a signal selected and transmitted by the selection switch 63 into a digital signal.

When described in detail with respect to the operation and effect of the present invention configured as described above.

When the broadcast signal input through the antenna (ANT) is tuned by the tuner 1000 and output to the intermediate frequency processor 2000, the intermediate frequency processor 2000 extracts and separates the image signal into an image intermediate frequency and an audio intermediate frequency from the broadcast signal. The separated signal, that is, the first color image signal CVBS1 is outputted to the dual screen generator 105 and the synchronous separation and divider 3000.

At the same time, the first color image signal CVBS1 is input from the intermediate frequency processing unit 2000 to the subcarrier frequency regeneration unit 6000b of the color phase synchronizer 6000, and is input to the input first color image signal CVBS1. The subcarrier frequency f _sc is reproduced and transmitted to the VRC regeneration unit 6000a.

The vertical synchronous separation unit 3000a of the synchronous separation and division unit 3000 separates the vertical synchronous signal of 50 Hz in the case of the arm (PAL) method and 60 Hz in the case of the NTSC method for the first color image signal. The dividing unit 3000b divides the divided vertical synchronization signal into 1/2 divided into a 25Hz or 30Hz signal and outputs the signal to the servo 4000a of the regeneration unit 4000.

Accordingly, when the servo unit 4000a sends the video tape to the drum and capstan system 4000b so that the video tape can be read in synchronization with the vertical synchronization signal input from the division unit 3000b, the video signal of the tape is transmitted to the first color video signal. The video signal whose phase PHASE is synchronized with the vertical synchronization signal of CVBS1 is read and sent to the VR playback unit 6000a of the color phase synchronization unit 6000.

Therefore, the V phase reproduction unit 6000a of the color phase synchronization unit 6000 uses the subcarrier frequency f _sc input from the subcarrier frequency reproduction unit 6000b to determine the color phase (or color phase) of the color signal read from the VRC tape. f _sc phase) is locked to the color phase of the first color image signal CVBS1.

As a result, the first color image signal CVBS1 and the second color image signal CVBS2 are vertically synchronized with the color phase (or f _sc signal phase) of the color signal.

When the first color image signal CVBS1 and the second kanga image signal CVBS2 in which the vertical phase is synchronized with the color phase of the color signal are transmitted to the dual screen generator 5000, the dual screen generator 5000 It will be displayed in dual screen.

Here, the detailed operation will be described based on the detailed view of the dual screen generator 5000.

When the first color image signal CVBS1 and the second color image signal CVBS2 in which the vertical phase is synchronized with the color phase of the color signal are input, respectively, the first analog / digital converter of the first screen compression unit 5000a ( In operation 51a, the first color image signal CVBS1 is input, converted into a digital signal, and output to the luminance / color signal separation unit 52a.

Accordingly, the luminance / color signal separation unit 52a separates the luminance signal Y1 and the color signal C1 from the input digital color image signal, and among the separated signals, the luminance signal Y1 is a first compression unit ( 53a), and the color signals C1 are respectively output to the second compression unit 54a. At this time, the color phase of the color signal C1 is the same as in (a) of FIG.

Then, the first and second compression units 53a and 54a are compressed by 1/2 on the time axis, and the signal compressed by the second compression unit 54a is transmitted to the mixer 56a. The phase is printed through the second compression section 54a at 2f _ac as in (b) of FIG. 6.

Since it is printed on 2f _sc , it needs to be down-converted back to f _sc , and multiplied by the subcarrier frequency f _ac in the mixer 56a gives the same result as in FIG.

This is passed through a band pass filter 57a having the characteristics as shown in FIG. 6D to remove the 3f _sc component, and outputs the removed color signal C1 '.

In this case, the luminance signal Y1 compressed by the first compression unit 53a is delayed by the delayed time while the color signal C1 passes through the mixer 56a and the band pass filter 57a in the delay unit 55a. When the luminance signal Y1 'is outputted to the adder 58a, the adder 58a outputs the luminance signal Y1' output from the delay unit 55a and the color signal C1 through the band pass filter 57a. The compressed first color image signal CVBS1 ′ is added to the screen control unit 5000d.

As in the above case, the second color image signal CVBS2 of the second screen compression unit 5000b is changed in the same manner as the first color image signal CVBS1 is changed.

That is, the second analog / digital converter 51b, the luminance / color signal converter 52b, the fourth compression unit 53b, 54b, the delay unit 55b, the mixer 56b, and the band pass filter ( 57b) and the compressed second color image signal CVBS2 'generated through the adder 58b are the horizontal sync and the second color image signal CVBS2 of the first color image signal CVBS1 in the horizontal synchronization matching unit 59b. In order to match the delay of the horizontal synchronization of Figure 3 (bar) as shown in the high (H) delayed to output to the screen control unit (5000d).

When the selection switch 63 of the screen controller 5000d selects and outputs the signal selected by the switch control pulse signal SW-CP, the digital color / analog converter 64 outputs the analog color image signal CVBS. ) To output to TV (TV) to display.

Then, the TV appears as a dual screen.

At this time, the horizontal synchronous separation and pulse generator 60 of the control signal generator 5000c receives the input first color image signal CVBS1, separates the horizontal synchronous H1, and separates the separated horizontal synchronous H1. The first color image signal CVBS1 'or the compressed signal is outputted to the signal generator 62, and is then output to the selection switch 63 of the screen controller 5000d by generating a switching control pulse SW-CP. One of the second color image signals CVBS2 is used as a signal for selecting.

The horizontal synchronization separator 61 receives the output second color image signal CVBS2, separates the horizontal synchronization H2, and outputs the horizontal synchronization signal H2 to the signal generator 62.

Accordingly, the signal generator 62 receives the horizontal synchronous H1 generated from the horizontal synchronous separation and pulse generator 60 and the horizontal synchronous H2 generated from the horizontal synchronous separator 61, respectively. The control pulse control signal HC-CP is generated and output to the second screen compression unit 5000b so as to match the phases of the two horizontal synchronizations.

As described in detail above, the present invention synchronizes the phase of the color signal reproduced by the VRL with the vertical synchronization of the signal coming from the tuner and the color phase of the color signal so that only the luminance signal and the color signal can be processed in the dual screen processing. When implementing the circuit as a whole, there is an effect that the price is reduced by reducing the components of each part.

Claims (7)

Intermediate frequency processing means for converting and amplifying a high frequency broadcast signal input and tuned from a tuner into a first color image signal (CVBS1) having an intermediate frequency, and outputting the first color image signal output from the intermediate frequency processing means; A synchronization separating and dividing means for separating the vertical synchronizing signal and outputting the separated signal, the phase being synchronized with the vertical synchronizing signal when outputting the vertical synchronizing signal outputted from the synchronizing separating and dividing means to the video tape in synchronization therewith; Playback means for reading out and outputting a video signal, reproducing the subcarrier frequency fsc from the first color video signal output from the intermediate frequency processing means, and using the reproduced frequency fsc Color phase synchronizing means for outputting a second color image signal (CVBS2) in which the color phase is synchronized with the color phase of the first color image signal; Group and subcarrier frequency (f _sc) and a second color image signal output from the first color image signal and a color phase lock means of said intermediate frequency processing means for phase synchronization of signals to the input adjusted to the aspect ratio of each screen and it V-LCD dual screen processing apparatus characterized by consisting of a dual screen generating means for generating two screens by synthesizing. 2. The color phase synchronizing means according to claim 1, wherein the color phase synchronizing means includes subcarrier frequency reproducing means for reproducing a subcarrier frequency f _sc from a first color image signal output from the intermediate frequency processing means, and a subcarrier frequency regenerated by the subcarrier frequency reproducing means. _fSC ) is configured to synchronize the color phase of the color signal read from the VLC tape with the color phase of the first color image signal and output the second color image signal synchronized therewith. V-Cell dual screen processing device. The method of claim 1, wherein the dual screen processing means outputs a compressed first color video signal processed by performing a 1 / 2-compression after analog / digital conversion and splitting the first color video signal input through a tuner. First screen compression means; Second screen compression means for splitting the second color video signal reproduced by V-Cal and compressing the signal to 1/2 and outputting a compressed second color video signal synchronized with the first color video signal horizontally; ; Control signal generating means for receiving the first color image signal and the second color computation signal to separate horizontal synchronization and to generate a switch control pulse and a horizontal synchronization control pulse signal according to the separated horizontal synchronization; It is composed of a screen adjuster for controlling the output so that a dual screen appears by selecting a compressed first color video signal or a compressed second color video signal according to a control signal generated from the control signal generating means and converting it into an analog signal. Dual-screen processing device of V'al characterized in that. 4. The apparatus of claim 3, wherein the first screen compression means comprises: analog / digital conversion means for converting a first color image signal input through a tuner into a digital signal; Luminance / color signal separation means for separating the luminance signal and the color signal from the signal input from the conversion means; First compression means for receiving the luminance signal outputted from the luminance / color signal separation means and compressing the received luminance signal by half on a time axis; Second compression means for receiving a color signal outputted to the luminance / color signal separation means and compressing the color signal to 1/2 on a time axis; A mixer for multiplying the subcarrier frequency (f _sc ) to compensate for the shifted color phase of the color signal compressed by the second compression means; A band pad filter for removing unnecessary components from the color signal output through the mixer and outputting the removed color signal; Delay means for delaying and outputting the luminance signal as much as the color signal is delayed while passing through the band pass filter; And an adder for outputting a color image signal generated by adding a luminance signal through the delay means and a color signal output through a band pass filter. 4. The second screen compression means further comprises horizontal synchronization matching means for matching the phase of the horizontal synchronization of the first color image signal and the horizontal synchronization of the second color image signal in the same configuration as the first screen compression means. Dual-screen processing device of VRC characterized in that the configuration. 4. The apparatus of claim 3, wherein the control signal generating means comprises: horizontal synchronizing separation and pulse generating means generated by separating the horizontal synchronizing unit and the control pulse from the input first color image signal; Horizontal synchronous separating means for separating and outputting horizontal synchronous from the input second color image signal; And a signal generating means for receiving the horizontal synchronization generated from the horizontal synchronous separation and pulse generating means and the horizontal synchronous separating means to generate and output a horizontal synchronous control pulse signal. 4. The apparatus of claim 3, wherein the screen adjusting means comprises: switching means for selecting a first color image signal or a second color image signal compressed according to an input switch control pulse signal; And a digital / analog converting means for outputting a signal converted from the digital signal transmitted through the switching means into an analog signal.