KR900000335B1 - Video signal reproduction apparatus - Google Patents

Abstract

The apparatus for reproducing video signals recorded by the low frequenc bandwidth conversion method includes a dividing process for dividing the reproduced video signals into the covnerted signal with low frequency band width and frequency modulated signals, a demodulating process for demodulating the frequency modulated signal for obtaining reproducing the brightness signal, a first frequency modulating process for frequency modulating the converted signal with low frequency band width for obtaining a first subcarrier signal, a second frequency modulating process for obtaining a second subcarrier signal, and a process for obtaining color video signal.

Description

Video signal playback device

1 is a block diagram showing a video signal reproducing apparatus according to a representative embodiment of the present invention.

2 is a block diagram of a comb-tooth type luminance signal processing filter.

3 shows the relationship between the frequency characteristics of the comb filter a and the frequency interleave b.

4 to 6 are convex diagrams each showing a video signal reproducing apparatus according to another embodiment of the present invention.

FIG. 7 is a circuit diagram showing a part of the video signal reproducing apparatus shown in FIG.

8 and 9 are waveform diagrams showing waveforms in the circuit shown in FIG.

10 is a convex diagram showing a video signal reproducing apparatus according to another embodiment of the present invention.

FIG. 11 is a circuit diagram showing a part of the video signal reproducing apparatus shown in FIG.

12 and 13 are waveform diagrams showing waveforms in the circuit shown in FIG. 11, respectively.

* Explanation of symbols for main parts of the drawings

1: playhead 2: preamplifier

3: high pass filter (HPE) 4: limiter

5: demodulator 6: low pass filter (LPF)

7: luminance signal processor 8: chroma signal processor

The present invention relates to an apparatus for reproducing an image signal recorded on a recording medium by a low band frequency conversion method.

In recent years, with the dramatic improvement of the video cassette recorder, extremely excellent image reproduction performance has been demanded. Hereinafter, a conventional apparatus for recording and reproducing a low band conversion video signal will be described.

First, a description will be given of the recording apparatus. When recording a composite color video signal of NTSC or PAL method in the prior art, only the low band luminance signal component Y _{1 of the} luminance signal Y is extracted with a 3 MHz low band filter. It was common to convert a frequency modulated signal by using an FM modulator. On the other hand, the composite color video signal passing through the band pass filter BPF through which the curl part transfer signal is passed becomes a mixed signal of the high band component Y _H of the luminance signal Y and the chroma signal C. Considering the chroma signal C divided by the subcarrier frequency f _s and the side band component f _c , this can be expressed as f _s + f _c + Y _H. Subsequently, only the color burst signal is extracted from this signal, and the color burst frequency, that is, the color subcarrier frequency f, is performed by a phase locked loop (PLL) composed of a phase comparator, a low pass filter (LPF), and a voltage controlled oscillator (VCO). _s ) is converted into a continuous signal having The horizontal sync signal F _H extracted from the composite color video signal by the sync separator is low-band subcarrier by another phase locked loop (PLL) composed of a phase comparator, a low band filter, a voltage controlled oscillator (VCO), and a divider. Convert to (f ₁ ). The signal obtained by balancing the color subcarrier frequency f _s via the balance modulator BM is a continuous signal represented by f _s + f ₁ . When the continuous signal and the composite signal from the low band filter are input to another balance modulator, a low band converted signal represented by f ₁ -f _c -Y _H is obtained.

(f _s + f ₁ )-(f _s + f _c + Y _H ) = f ₁ -f _c -Y _H

This signal and the frequency modulated luminance signal are synthesized and amplified by the recording amplifier and recorded on the magnetic tape by the recording head.

Next, a conventional playback apparatus will be described. The signal reproduced by the reproduction head is amplified by a preamplifier and then separated into a frequency modulated luminance signal and a low band converted signal by a high band filter and a low band filter. The limiter limits the amplitude of the FM luminance signal to stabilize it, and the demodulator demodulates the FM luminance signal into the original ground band luminance signal Y _L. This low band luminance signal Y _L contains a certain amount of jitter component Δ generated by the tape drive mechanism.

Meanwhile, the low band converted signal passing through the low band filter is reconverted to the chroma signal C having the color subcarrier frequency f _s by the signals from the local oscillator and the chroma signal processor. The chroma signal C is combined with the low band luminance signal Y _L to form an original composite color video signal. At this time, the chroma signal processor stabilizes the phase of the color beater signal so that the specified color is accurately reproduced on the television screen. In other words, in the chroma signal processing unit, only the conjugate burst signal is extracted from the signal which is frequency-modulated by the frequency modulator and passed through the band pass filter, and the color burst signal is phased from the signal from the color subcarrier frequency oscillator by a phase comparator. Are compared. Then, the signal containing the phase difference of the comparative phase is smoothed by the low band filter to drive the voltage controlled oscillator. The voltage controlled oscillator outputs a mixed frequency f ₁ + Δ of the low band subcarrier frequency f ₁ and the phase difference signal component Δ. The output of this voltage controlled oscillator is frequency modulated by the output of the color carrier frequency oscillator in the frequency modulator, resulting in f _s + f ₁ + Δ and by the low band conversion signal (f ₁ + f _c -Y _H + Δ). The frequency is converted to a color conveyance signal f _s + f _c + Y _H as shown below.

(f _s + f ₁ + Δ)-(f ₁ -f _c -Y _H + Δ) = f _s + f _c + Y _H

This loop performs a negative feedback operation to cancel all phase differences, as shown by the above equation, thereby generating a signal free of phase jitter components. In the past, this was called automatic phase control (APC). Details of this are disclosed in Japanese Patent Publication No. 50-14852. The phase jitter component is completely removed from the color conveyance signal, so colors are reproduced accurately. Although the frequency demodulated low band luminance signal Y _L + Δ still contains jitter components, the television receiver can properly reproduce the image by properly compensating the jitter components.

However, after converting the frequency of the low band conversion signal, the jitter component is completely removed from the high band luminance signal _H included in the signal of the color subcarrier band, but the television receiver has a low band luminance signal (Y _L + Δ). Following the compensation of the jitter component Δ, the high band luminance signal Y _H is shaken, and as a result, the quality of the reproduced high band luminance signal Y _H is degraded. A method of effectively using the high band luminance signal Y _H is disclosed in Japanese Patent Laid-Open Nos. 57-89387 and 57-89388. However, this method has the disadvantage of requiring a timebase collector which is not easy to configure. In addition, according to the prior art, the carrier for frequency conversion should be set to be an integer multiple of the synchronization signal, and when the subcarrier of the NTSC video signal is used, this cannot be an integer multiple of the synchronization signal. none.

The present invention has been made in view of the above-mentioned drawbacks of the prior art, and its object is to provide a novel video signal reproduction apparatus that can realize high resolution with a simple configuration and does not require a complicated timebase collector.

The video signal reproducing apparatus of the present invention for achieving this object is composed of two systems for converting a low band converted signal into an original signal. One system processes the chroma signal, and after removing the phase jitter component from the color subcarrier, extracts only the chroma signal by the comb filter CF. Another system processes the luminance signal, converts the frequency of the luminance signal without removing the jitter component, and then extracts only the luminance signal by the comb filter CF. The luminance signals and luminance signals from the two systems are mixed with the demodulated low-band luminance signal to include a luminance signal that does not include a phase jitter signal and a quantity of jitter components as included in the low-band components of the luminance signal. A composite video signal consisting of the high band components of the signal is obtained. Therefore, the high band luminance signal is completely synchronized with the low band luminance signal. As a result, high-band luminance signals appear to remain on the television screen, resulting in television images with extremely high resolution and accurate color.

According to the present invention, it is possible to effectively reproduce the high band component of the low band conversion luminance signal with an extremely simple configuration even without complicated devices such as a time base collector.

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

1 is a convex diagram of a video signal reproducing apparatus according to an exemplary embodiment of the present invention. The video signal reproduced by the reproduction head 1 is amplified by the preamplifier 2 and then by the high band filter (HPF) 3 and the low band filter (LPF) 6 respectively. It is separated into a low-band conversion chroma signal. As in the prior art, the limiter 4 removes the amplitude variation of the frequency modulated luminance signal and the demodulator 5 demodulates the frequency modulated luminance signal to obtain a reproduced luminance signal. The low band conversion chromaticity signal is input to two frequency conversion processing units, namely the conventional chromaticity signal processing unit and the luminance signal processing unit 7 characterized in the exemplary embodiment of the present invention.

The oscillation signal output from the local oscillator (OSC) 83 of the chromaticity signal processing section 8 is input to an automatic phase controller (APC) 81 for stabilizing color burst. The chromaticity signal comb filter (CCF) 82 extracts only the chromaticity signal from the output signal of the automatic phase controller 81. Since the automatic phase controller 81 and the local oscillator 83 of the chromaticity signal processing section 8 have the same configurations as those shown in Japanese Patent Publication No. 50-14852, detailed description thereof will be omitted here. In short, the low-band conversion chromaticity signal input to the input terminal 811 of the automatic phase controller 81 is converted to a predetermined frequency from the reference input terminal 812, and the phase of the color buster is negative in the output terminal 813. The color buster is stabilized because it is accurately fixed on the signal phase from the reference input terminal 812 by the feed back loop.

Next, the luminance signal processing unit 7 characterized by the exemplary embodiment of the present invention will be described in detail.

The low band conversion chromaticity signal is input to an automatic phase controller (APC) 71 and its frequency is converted. The automatic phase controller 71 has the same configuration as that of the automatic phase controller 81. The luminance signal processing section 7 is not substantially different from the chromaticity signal processing section 8 in terms of its function. In other words, the frequency of the reference input signal input to the automatic phase controller 71 is not fixed but changes depending on the jitter component of the reproduction luminance signal. That is, the color burst signal from the automatic phase controller 71 is synchronized with the jitter component of the reproduction luminance signal.

In the luminance signal processing section 7, in order to generate a reference input signal synchronized with the jitter component of the reproduction luminance signal, the synchronous separator 75 extracts the horizontal synchronization signal from the output signal of the demodulator 5, and the 455 multiplier. Reference numeral 74 denotes a frequency of the horizontal synchronization signal 455 times, and a 1/2 divider divides the multiplied frequency in half and outputs the color subcarrier signal as a reference input signal. This is based on the fact that in the NTSC system, there is a special relationship between the color subcarrier frequency f _s and the frequency of the horizontal synchronization signal f _H expressed by the following equation.

Next, the operation of the luminance signal processing section 7 will be described in detail. A voltage controlled oscillator of the automatic phase controller (71) is oscillating at a frequency of f _1, however, in the same manner as in the conventional color signal processing section (8) due to the phase difference is the oscillation frequency f ₁ + Δ. Since the reference input signal is f _s + Δ, the balance modulator outputs a signal represented by f _s + f ₁ + 2Δ. This signal is again balanced-modulated by the low-band conversion chromaticity signal, and as a result, a reproduction chromaticity signal f _s + f _c + Y _H + Δ is output according to the following equation.

(f _s + f ₁ + 2Δ)-(f ₁ -f _c -Y _H + Δ) = f _s + f _c + Y _H + Δ

The reproduction chroma signal f _s + f _c + Y _H + Δ includes the jitter component Δ not present in the output signal of the chroma processing unit 8.

The reproduction chromaticity signal also includes the frequency interleaved high band component Y _H of the luminance signal. When the reproduced chroma signal passes through the luminance signal comb filter YCF 72, a signal Y _H + Δ is output. This signal contains the same jitter component as the reproduction luminance signal Y _L.

As is well known, the chroma signal and the luminance signal are in a frequency interleaved relationship as shown in FIG. As shown in FIG. 2, the luminance signal comb filter 72 which outputs the sum of the output and the input of one horizontal period (1H) delay element has a special frequency characteristic as shown in FIG. The signal comb filter 72 attenuates only the chroma signal.

When the adder 9 synthesizes the chroma signal, the high band component Y _{H of the} luminance signal and the low band luminance signal Y _L from the demodulator 5, the chroma signal with no phase jitter, the high band component and the low band A composite video signal composed of luminance signals having the same jitter component in the component is output from the output terminal 10. When the video signal is observed through a television screen, the chiller is reproduced precisely and clearly because the chromatic signal does not contain any phase jitter components. In addition, since the television receiver can accurately follow the compensation for the jitter component of the luminance signal, the high band component of the luminance signal is fixedly seen without shaking on the television screen.

In the above-described embodiment, the horizontal synchronizing signal is applied to the luminance signal processing unit 7, but even when the pilot signal recorded on the magnetic tape is used, the same effect as that realized by the horizontal synchronizing signal can be obtained. For example, a sine wave signal of a specific frequency corresponding to 1 / n (n is an integer) of the color subcarrier frequency may be time-divided to record a pilot signal on a magnetic tape.

4 is a convex diagram showing another embodiment of the present invention. As described above, the luminance signal comb-type filter 72 attenuates the chroma signal to extract only the high band component Y _H of the luminance signal. However, since the signal from the automatic phase controller 71 contains a certain amount of jitter component, it can be seen that the spectrum as shown in FIG. Therefore, when there is a large amount of jitter, the luminance signal comb filter using a delay line with a constant delay time can sufficiently attenuate the chromaticity signal due to the narrow width of the node of frequency characteristics. have.

To compensate for this, the embodiment shown in FIG. 4 uses a luminance signal comb filter 721 that can use a variable delay wave whose delay time varies depending on a clock pulse frequency instead of the luminance signal comb filter 72 described above. ) Is adopted. The variable delay line 722 may be a charge coupled device (CCD). The synchronizing separator 75 outputs a synchronizing signal including the jitter component. The clock pulses are output by the N-multiplier 90 phase locked to jitter containing the synchronization signal. Therefore, the frequency characteristic shown in Fig. 3A is shaken in the horizontal direction according to the signal of the color carrier signal band, and as a result, the chroma signal is effectively attenuated. In other words, the N-multiplier 90 generates a predetermined frequency corresponding to N times the synchronization signal frequency including the jitter component. When the frequency is input to the N-stage charge combiner 722, the output and the input of the charge combiner 722 are correlated with each other, so that the chromaticity signal having an inverse relationship is effectively attenuated.

When the frequencies of the N-multiplier 90 and the 455 multiplier 74 used in the automatic phase controller 71 are in a multiple relationship, one PLL oscillator may be used in common. For example, in the case of using the 455-step charge coupling device, the output of the 455 multiplier 74 may be used instead of the N-multiplier 90 so that the N-multiplier 90 may be removed.

5 is a convex diagram showing a video signal reproducing apparatus according to another embodiment of the present invention. In the embodiment shown in FIG. 1, although the high band component Y _H of the luminance signal appears to be static, there is no phase relationship between Y _H and Y _L. The configuration of the embodiment shown in FIG. 5 has a phase control element in addition to the configuration of the embodiment shown in FIG. 1, so that the phase relationship between Y _H and Y _L can be controlled. The phase detector 91 detects the phase relationship between the synchronization signal from the synchronization separator 75 and the high band component of the synchronization signal in the high band luminance signal Y _H and controls the phaser 92 so that the phase relationship is constant. do. Thus, the phase of the carrier is kept precise, and the phases of the high band luminance signal Y _H and the low band luminance signal Y _L coincide exactly with each other. As a result, it is possible to more precisely control the high band component Y _H of the luminance signal.

In the NTSC mode, the color subcarrier frequency f _s is 227.5 f _H. When the phase is controlled accurately, there are only two types of phase relations, 0 ° and 180 °, between the synchronization signal and its high band. Therefore, in the case where the phases are 180 degrees apart, the phase inversion or non-inverting circuit can be simply reversed to 0 ° by the phase shifter 92, and the phase detector 91 uses flip-flops. You may also 6 shows such a modification, in which the abnormal phase 92 is replaced by the pulse width detector 94, the state holder 93 and the phase controller 97. In FIG.

The pulse width detector 94 detects an output pulse width of the phase detector 91 exceeding a predetermined value to remove noise. The state holder 93 converts the state when there is a pulse output from the pulse width detector 94 and maintains the current state when there is no pulse output from the pulse width detector 94. The phase controller 97 converts the phase of the frequency conversion carrier frequency or restores the original state in response to the output of the state holder 93. If the phase relationship between the high-band component of the synchronization signal and the high-band luminance signal Y _{H in the} demodulated low-band luminance signal Y _H is in phase out of phase, the phase of the carrier for frequency conversion is inverted and accordingly high-band luminance By inverting the signal, the low band phase and the high band phase of the luminance signal are exactly coincident with each other.

The circuit arrangement for performing this operation is shown in FIG. 8 and 9 are diagrams showing waveforms at various points shown in FIG. 7, respectively. The input terminals 913 and 914 of the phase detector 91, the input terminal 971 and the output terminal 972 of the phase controller 97 correspond to those shown in FIG.

In FIG. 8, (a) shows the waveform of the output signal of the demodulator 5, and (c) shows the waveform of the output signal of the sync separator 75 which is the trigger input of the flip-drop 912. The waveform (b) of FIG. 8 represents the output signal of the luminance signal comb-type filter 72. Since the output signal passes through the delay line 911 and becomes the waveform of (d), the timing is separated. Exactly matches the signal. Waveform d is input to flip-flop 912 as a data input signal. Flip-flop 912 is a phase detector that outputs a signal as shown in (e). The output (e) goes low when the phase relationship is positive phase relationship as shown by (A), while the output (e) goes high when the phase relationship is reverse phase relationship as shown by (B). Connected. Thus, the phase detector 91 can detect the semi-inverted phase.

9 shows the phase relationship on the extended time axis. The phase detector 91 outputs the pulse e of FIG. The terminal 944 of the pulse detector 94 is connected to a power supply. An integrated circuit composed of diode 941, capacitor 942 and resistor 943 outputs waveform f in FIG. When the pulse width of (e) is wide, that is, when the phase is inverted for a long time, the output voltage f of the integrated circuit exceeds the threshold voltage Vt of the Schmitt trigger circuit 945 and the Schmitt trigger circuit ( As shown by (g) of FIG. 9 of FIG. 945, the state becomes HIGH. Thus, the state of the state holder 93 composed of the EX-OR gate 931 and the flip-flop 932 is shown in FIG. Inverted as shown. The phase controller 97 composed of the EX-OR gates 973 inverts the phase of the frequency return carrier to a positive phase. Even if the phase detector 91 does not operate due to interference of noise, the output voltage of the integrated circuit does not exceed the threshold voltage Vt, so the state of the state holder 93 is not inverted.

In this manner, the phase of the carrier for frequency conversion is maintained accurately, so that the phases of the high band luminance signal Y _H and the low band luminance signal Y _L coincide with each other.

When the phase of the frequency conversion carrier is inverted, the phase of the high band luminance signal is also inverted. On the other hand, the phase controller 97 inserts the phase of the high-band luminance signal directly by inserting it into the line immediately before or after the luminance signal comb filter 72 instead of inserting it into the output terminal of the 1/2 divider 73. You can also reverse it.

10 is a diagram showing another embodiment of the present invention. In this embodiment, the phase shifter 92 shown in FIG. 5 is provided behind the output terminal of the luminance signal comb filter 72, and the pulse width detector is shown in FIG. (95) and the phase controller 96 are used instead of the abnormal phase 92.

In order to exclude adverse effects due to noise interference, the pulse width detector 95 detects the output pulse of the phase detector 91 only when the pulse width is equal to or larger than a predetermined value. The phase controller 96 and the pulse width detector 95 inverts the phase of the high band luminance signal Y _H in response to the output signal. When the phase of the high band component of the synchronization signal and the phase of the high band luminance signal of the demodulated low band luminance signal and the high band luminance signal Y _H are in phase out of phase, the phase controller 96 performs the phase of the high band luminance signal. By inverting, the phases of the low band component and the high band component of the luminance signal are exactly matched.

11 shows a circuit for performing such an operation. The input terminals 913 and 914 of the phase detector 91, the input terminal 962 and the output terminal 961 of the phase controller 96 shown in FIG. 11 are the same as those shown in FIG.

12 and 13 show waveforms at each point of the circuit shown in FIG. In FIG. 12, (a) shows the waveform of the output signal of the demodulator 5. FIG. This waveform is converted into the signal represented by C by the sync separator 75, and this signal becomes the tractive input pulse of the flip-flop 912. In FIG. 12, the waveform b is the output signal of the luminance signal comb-type filter 72. In FIG. This signal (b) passes through the delay line 911 of FIG. 11, as shown by (d) in FIG. 12, to exactly match the timing with the synchronization signal, and then flip-flops 912 as the data input signal. Is entered. This operation is the same as that shown in FIG. Flip-flop 912 functions as a phase detector. When the phase is normal as shown in Fig. 12A, the output of the flip-flop 912 goes LOW as shown in Fig. 12E, while the phase is shown in Fig. 12B. In the case of the reversed phase, the output of the flip-flop 912 becomes HIGH as shown by (e) in FIG.

In Fig. 13, (e) shows the output signal of the phase detector 91 on the extended time axis. The output signal of the integrated circuit composed of the resistor 951 and the capacitor 952 of FIG. 11 becomes as shown by (f) in FIG. When the pulse of the signal (e) has a wide width, the output voltage of the integrated circuit exceeds the threshold voltage (V ₁ ) (V ₂ ) of the Schmitt trigger circuit (955), as shown in (g) in FIG. Output the same signal. Thus, the phase of the high band luminance signal is inverted or inverted by the phase controller 96 composed of the inverting amplifier 963 and the switching switch 964 in response to the output signal g of the pulse width detector 95. Go back. Even if the phase detector 91 does not operate due to interference of noise, the output voltage of the integrated circuit does not exceed the threshold voltage V ₁ (V ₂ ).

Therefore, the phase of the high band luminance signal Y _H in the reverse phase is inverted to the positive phase, and the high band luminance signal Y _H and the low band luminance signal Y _L coincide exactly with each other.

The circuits of FIGS. 7 and 11 can obtain the same function even if they are modified in various other forms. In addition, the above-described embodiments can be variously modified within the scope of the invention.

Claims (16)

Recorded image consisting of frequency-modulated signal obtained by frequency-modulating the carrier signal by low-band conversion signal obtained by converting color subcarrier signal separated from composite color video signal to low frequency band and luminance signal separated from composite color video signal Means (1) for reproducing a signal from a recording medium, means (6) (3) for separating the reproduced video signal into the low band conversion signal and the frequency modulated signal, and demodulating the frequency modulated signal to reproduce reproduction luminance signals. Means for obtaining a first frequency conversion means for obtaining a first color subcarrier signal having no phase jitter component by frequency converting the localized signal into the low band converted signal; Frequency converting the signal by the variable oscillation signal synchronized with the reproduction luminance signal to obtain a second color subcarrier carrier band signal having the same phase jitter component as the reproduction luminance signal; Characterized in that it comprises two frequency conversion means (7) and means (9) for mixing the reproduction luminance signal, the first color subcarrier signal and the second color subcarrier signal to obtain a reproduced composite color video signal. Video signal playback device. Recorded image composed of frequency-modulated signal obtained by frequency-modulating the carrier signal by low-band conversion signal obtained by converting color subcarrier signal separated from composite color video signal to low-frequency band and luminance signal separated from composite color video signal Means (1) for reproducing a signal from a recording medium, means (6) (3) for separating the reproduced video signal into the low-band conversion signal and the frequency modulated signal, and demodulating the frequency modulated signal to reproduce reproduction luminance signals. Means (5) for obtaining a signal; a means (75) for separating a horizontal synchronization signal from the reproduction luminance signal; and a first color subcarrier band having no phase jitter component by frequency converting the low band converted signal by a local oscillation signal. A first color converting means (8) for obtaining a signal and a second color subcarrier band signal by frequency converting the low frequency converted signal by a variable oscillation signal synchronized with the horizontal synchronization signal; Second frequency converting means (7) for extracting a high band luminance signal having the same phase jitter component as that of the reproduction luminance signal from the second color subcarrier band signal, and the reproduction luminance signal and the high band luminance signal; And means (9) for mixing the first color subcarrier carrier band signal to obtain a reproduction composite color video signal. 3. The second frequency converting means (7) according to claim 2, wherein the second frequency converting means (7) has a constant phase difference between the horizontal synchronization signal separated from the reproduction luminance signal and the high band component of the horizontal synchronization signal included in the second color carrier signal. And a means for controlling the phase of the variable oscillation signal so as to make it possible. Recorded image consisting of frequency-modulated signal obtained by frequency-modulating the carrier signal by low-band conversion signal obtained by converting color subcarrier signal separated from composite color video signal to low frequency band and luminance signal separated from composite color video signal Means (1) for reproducing a signal from a recording medium, means (6) (3) for separating the reproduced video signal into the low band conversion signal and the frequency modulated signal, and demodulating the frequency modulated signal to reproduce a luminance signal. Means (5) and frequency-convert the low-band transformed signal with a variable oscillation signal to obtain a first color subcarrier carrier signal having no phase jitter component, and extract a reproduction color signal from the first color subcarrier carrier signal. First frequency converting means (8), and the low band converted signal by frequency oscillation by a variable oscillation signal to have the same phase jitter component as that of the regeneration signal. Second frequency conversion means (7) for obtaining a two-color subcarrier band signal and extracting a high band component of a luminance signal having the same jitter component as that of the reproduced luminance signal from the second color subcarrier band signal; A video signal reproducing apparatus comprising a means (9) for mixing a signal, a high band component of said luminance signal, and said chromaticity signal to obtain a reproduction composite color video signal, wherein said second frequency conversion means (7) is adapted to reproduce said reproduction. Means (75) for separating the horizontal synchronizing signal from the luminance signal, means (73) (74) for generating the variable oscillation signal from the horizontal synchronizing signal, and the low band conversion signal by the variable oscillation signal. An automatic phase controller (71) for frequency conversion to a color subcarrier band signal and a filter means (72) for extracting a high band component of said luminance signal from said second color subcarrier band signal; Signal reproducing apparatus. 5. The video signal reproducing apparatus as set forth in claim 4, wherein said filter means (72) is a comb filter for attenuating chromaticity signals included in said second color carrier band signal. 5. The second frequency converting means (7) according to claim 4, wherein said second frequency converting means (7) comprises a pulse generator for generating a pulse signal synchronized with said horizontal synchronizing signal, and said filter means (72) is included in said second color carrier band signal. And a comb-type filter for attenuating the chromaticity signal, wherein the comb-type filter has a variable delay element (72) for changing a delay time in response to the pulse signal. 5. The filter unit (72) according to claim 4, wherein the filter means (72) is composed of a comb-shaped filter for attenuating the chromaticity signal included in the second color subcarrier signal, and the comb-shaped filter is the variable oscillation signal generating means (73). And a variable delay element for varying a delay time in response to a pulse signal generated by the oscillator of 74. A recording consisting of a low-band conversion signal obtained by converting a signal of a color subcarrier separated into a composite color video signal to a low frequency band and a frequency modulated signal obtained by frequency-modulating a carrier signal by a luminance signal separated from the composite color video signal. Means (1) for reproducing a video signal from a recording medium, means (6) (3) for separating the reproduced video signal into the low band conversion signal and the frequency modulated signal, and demodulating the frequency modulated signal to reproduce reproduction luminance. Means for obtaining a signal (5) and frequency conversion of the low band converted signal by a local oscillation signal to obtain a first color subcarrier band signal having no phase jitter component, and a reproduction chromaticity signal from the first color subcarrier band signal. A first frequency converting means (8) for extraction and frequency conversion of the low band converted signal by a variable oscillation signal to have a phase jitter component equal to that of the reproduction color signal; Second frequency conversion means (7) for obtaining a second color subcarrier band signal and extracting a high band component of a luminance signal having the same jitter component as that of the reproduction luminance signal from the second color subcarrier band signal; In the video signal reproducing apparatus comprising a means (9) for mixing a luminance signal, a high band component of said luminance signal, and said chromaticity signal to obtain a reproduction composite color video signal, said second frequency conversion means (7) comprises: Means (75) for separating a horizontal synchronizing signal from a reproduction luminance signal, means (73) (74) for generating the variable oscillation signal from the horizontal synchronizing signal, and the low band conversion signal by the variable power generation signal; An automatic phase controller (71) for frequency conversion into a second color carrier band signal, and filter means (72) for extracting high band components of the second color carrier band signal and the luminance signal; Separated above And phase control means (91) (92) for controlling the phase of the variable oscillation signal so that the phase difference between the horizontal synchronization signal and the high band component of the horizontal synchronization signal included in the high band component of the luminance signal is constant. A video signal reproducing apparatus. The phase detector (91) of claim 8, wherein the phase control means (91) (92) detects the phase difference and shifts the phase of the variable oscillation signal in response to the phase difference pulse signal and a phase detector (91) generating a phase difference pulse signal. The video signal reproducing apparatus, characterized in that composed of a phase shifter (92). 10. The pulse width detector (94) of claim 9, wherein the phase shifter pulse detects the phase difference pulse signal only when the pulse width of the phase difference pulse signal is equal to or greater than a predetermined value. And a phase controller (93) which inverts the state only when it detects the signal, and a phase controller (97) which generates a phase of the variable oscillation signal in response to the output signal of the state holder. 9. The video signal reproducing apparatus according to claim 8, wherein the filter means (72) comprises a comb-shaped filter for attenuating the chromaticity signal included in the second color carrier band signal. 9. The variable oscillation signal generating means (73) (74) according to claim 8, further comprising: a frequency multiplier (74) for multiplying the frequency of the horizontal synchronizing signal separated from the reproduction luminance signal, and an output signal of the frequency multiplier (10) And a divider (73) for dividing the frequency of the video signal reproducing apparatus. Recorded image consisting of frequency-modulated signal obtained by frequency-modulating broadcast signal by low-band conversion signal obtained by converting color subcarrier signal separated from complex color video signal to low-frequency band and luminance signal separated from composite color video signal Means (1) for reproducing a signal from a recording medium, means (6) (3) for separating the reproduced video signal from the low band conversion signal and the frequency modulated signal, and demodulating the frequency modulation signal again. Means for obtaining a signal (5) and frequency-modulated the low band converted signal by a local oscillation signal to obtain a first color subcarrier carrier signal having no phase jitter component, and reproduced chroma signal from the first color subcarrier carrier signal. First frequency converting means (8) for extracting? And the low band converted signal by frequency oscillation by a variable oscillation signal to obtain phase jitter equal to that of the reproduced chroma signal Second frequency converting means (7) for obtaining a second color subcarrier carrier signal having a signal and extracting a high band component of a luminance signal having the same phase jitter component as that of the reproduction luminance signal from the second color subcarrier carrier signal; And a means (9) for mixing a reproduction luminance signal, a high band component of the luminance signal, and the chroma signal to obtain a reproduction composite color video signal, wherein the second frequency conversion means (7). Means (75) for separating a horizontal synchronization signal from the reproduction luminance signal, means (73) (74) for generating the variable oscillation signal from the horizontal synchronization signal, and the variable oscillation with the low band conversion signal. An automatic phase controller 71 for frequency-converting the signal into the second color carrier band signal by means of a signal, filter means 72 for extracting a high band component of the luminance signal from the second color carrier carrier band signal, and Refreshing And phase control means for controlling the phase of the high band component of the luminance signal such that the phase difference between the horizontal sync signal separated from the horizontal sync signal and the cross band component of the horizontal sync signal included in the high band component of the luminance signal is constant. A video signal reproducing apparatus. The phase detecting unit (100) according to claim 13, wherein said phase control means (110) detects said phase difference and generates a phase difference pulse signal, and a pulse for detecting said phase difference pulse signal only when the pulse width of said phase difference pulse signal is equal to or more than a predetermined value. And a phase controller (96) for inverting the phase of the high band component of the luminance signal in response to an output signal of the pulse width detector (95). 15. The video signal reproducing apparatus according to claim 14, wherein the filter means (92) comprises a comb-shaped filter for attenuating the chromaticity signal included in the second color carrier band signal. 15. The variable power signal generating means (73) (74) according to claim 14, wherein the variable power generation signal generating means (73) (74) includes a frequency multiplier (74) for increasing the frequency of the horizontal synchronizing signal separated from the reproduction luminance signal, and the frequency multiplier (74). And a divider (93) for dividing a frequency of an output signal of the video signal.

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