JPH08205188A - Dubbing device - Google Patents

Abstract

PURPOSE: To dub an excellent video signal at all times by neither remodulating nor demodulating an auxiliary signal for reproducing and recording a video signal at the time of dubbing, and recording a reproduced signal as it is. CONSTITUTION: When the dubbing is performed, a switch means 4 supplies a control signal ff supplied to a terminal (f) to a changeover switch 3. The signal ff is supplied to the switch 3 and then a reproduced luminance signal from a VTR signal reproduction processing means 1 which is supplied to a terminal (b) at the time of the dubbing is outputted to an adder as it is. A reproduced color signal, on the other hand, is supplied to the adder 5, which adds the reproduced color signal to the reproduced luminance signal outputted from the switch 3 to generate and output an encoded video signal. The encoded video signal generated and outputted by the adder 5 is supplied to the helper demodulating circuit of the signal recording processing system of the dubbing device. Consequently, neither an amplitude error nor a time error is accumulated even when the dubbing is repeated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dubbing apparatus suitable for dubbing a series of high-definition video signals having an aspect ratio different from that of a predetermined broadcasting system.

[0002]

2. Description of the Related Art FIG. 5 is a view for explaining a PALplus system VTR signal recording processing system, and FIG. 6 is a PALplus system.
It is a figure for explaining a VTR signal reproduction processing system of a system.

The EDTV (Extended Defin) is compatible with the current broadcasting system and improves the shortcomings of the current system.
ition TV, high resolution TV). As one of these technologies, so-called “PALp” is adopted, which aims at wide screen (image with aspect ratio of 16: 9) in addition to improvement of image quality of PAL (Phase Alternation by Line) broadcasting system.
There is a "lus" method.

As a system and a device relating to the PALplus system, a video signal recording / reproducing system, a video signal recording / reproducing device, and a video signal modulating / demodulating device (Japanese Patent Application No. 6-1601).
No. 2) was proposed.

As described therein, PALpl
The us system video signal maintains compatibility with a display device such as a PAL broadcasting system TV receiver which is a current broadcasting system by using a letterbox method for reducing a PALplus wide screen original image. Then, using this letterbox method, the widescreen original image is converted to the current T
When receiving an image with a V receiver (aspect ratio 16: 9), in order to improve the deterioration of the vertical resolution caused by stretching the reduced widescreen original image, an aid for improving the definition of the video information which is the main signal. An encoded video signal on which a signal (hereinafter referred to as a helper signal) is superimposed is transmitted.

In the above-mentioned video signal recording / reproducing system, video signal recording / reproducing apparatus, and video signal modulating / demodulating apparatus, the above-mentioned encoded video signal is recorded by the signal recording processing system shown in FIG. 5, and by the signal reproduction processing system shown in FIG. Reproduce the recorded encoded video signal.

First, as shown in FIG. 5, the above-mentioned signal recording processing system is demodulated by a helper demodulation circuit 13 and a helper demodulation circuit 13 for demodulating the above-mentioned helper signal from an encoded video signal supplied from a transmission line (not shown). A first signal for switching a helper signal and video information, which is a main signal of the above-mentioned encoded video signal, at a predetermined timing and outputting a video signal including a helper signal area and other video information area within one horizontal period. A YC separation circuit 1 for YC separating and outputting a luminance signal and a color signal from the video signal outputted from the changeover switch 14 and the first changeover switch 14, respectively.
5. VTR signal recording processing means 16 for applying predetermined signal recording processing to the recording luminance signal and recording color signal separated and output by the YC separation circuit 15 and recording the signal on a magnetic recording medium such as a magnetic tape. To be done. Here, the first changeover switch 14 is supplied with a first control signal from a control unit (not shown), and the first changeover switch 14 is demodulated as described above based on this control signal. The video signal and the video signal, which are the main signals of the helper signal and the encoded video signal, are switched and output. The above-mentioned VTR signal recording processing means 16 has the same configuration as a known VTR signal recording system.

The helper signal at the time of transmission originally has the property of a luminance signal like the luminance signal of the main signal, but is AM-modulated by the color subcarrier frequency.
When this video signal is recorded and reproduced by using, the helper signal is branched to the color signal system as it is, and the signal band is narrow band (± about 0.5 MHz) while being subjected to the low frequency conversion processing here. As a result, the band of the helper signal is extremely limited, so that the helper signal having the property of the luminance signal does not have a sufficient frequency spectrum in the reproduced video signal reproduced from the current VTR. The definition of the main signal in the reproduced video signal cannot be reinforced by this helper signal. Therefore, the helper demodulation circuit 8 demodulates the signal to convert it into a baseband signal mode, so that the helper signal can be recorded without impairing the frequency band of the helper signal.

Further, as shown in FIG. 6, the above-mentioned signal reproduction processing system frequency-separates the pre-recorded encoded video signal into a luminance signal component and a chrominance signal component for demodulation and reproduction, and at the same time, the VTR signal mentioned above. VTR signal reproduction processing means 17, VTR having a configuration complementary to the recording processing means 16.
The signal reproduction processing means 17, the helper re-modulation circuit 18 for re-modulating the helper signal from the reproduction luminance signal output from the VTR signal reproduction processing means 17, the helper signal re-modulated by the helper re-modulation circuit 18, and the reproduction luminance signal described above. At a predetermined timing, a second changeover switch 19 for outputting a reproduction luminance signal including a helper signal region and a luminance information region other than that within one horizontal period, and a reproduction outputted from the second changeover switch 19. An adder 20 that adds the luminance signal and the reproduction color signal output from the VTR signal reproduction processing means 17 to generate and output an encoded video signal.
Composed of and. Here, the second changeover switch 19 is supplied with a second control signal from a control unit (not shown), and the second changeover switch 19 is re-modulated based on this control signal as described above. The helper signal and the video signal, which is the main signal of the encoded video signal, and the video signal are switched and output. The above-mentioned VTR signal reproduction processing means 17 has the same structure as a known VTR signal reproduction system.

Then, as described above, the helper re-modulation circuit 18 re-modulates the helper signal demodulated when recording the PALplus system video signal, so that the same helper signal as the modulated helper signal that was AM-modulated at the time of transmission is re-produced. A modulated helper signal can be obtained.

[0011]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
When dubbing the s-system video signal, the already recorded encoded video signal is demodulated and reproduced by the above-mentioned signal reproduction processing system and recorded by the above-mentioned signal recording processing system. Here, recording the signal reproduced by the signal reproduction processing system by the signal recording processing system means that the re-modulation and demodulation of the helper signal contained in the reproduced encoded video signal are performed. Is. That is, in the above-mentioned signal reproduction processing system, it is re-modulated by the helper re-modulation circuit 18, demodulated by the helper demodulation circuit 13 in the signal recording processing system, and then recorded by the VTR signal recording processing means 16.

At this time, the circuit elements constituting the helper remodulation circuit 18 of the signal reproduction processing system or the helper demodulation circuit 13 of the signal recording processing system have individual differences such as variations in temperature characteristics. Due to this individual difference, an amplitude error and a time error occur in the signal to be processed.

That is, for example, in FIG. 5, the encoded video signal is transmitted to the first changeover switch 14 through the signal path i passing through the helper demodulation circuit 13 and the signal path ii directly supplied to the first changeover switch 14. An amplitude error and a time error occur with respect to the signal to be recorded. Further, in FIG. 6, the reproduction luminance signal is converted into a signal transmitted to the second changeover switch 19 in the signal path iii via the helper remodulation circuit 18 and the signal path iv directly supplied to the second changeover switch 19. On the other hand, an amplitude error and a time error occur.

For example, when the encoded video signal is recorded and reproduced, the amplitude error and the time error due to the above-mentioned individual difference are suppressed to a range where the reproduced video signal has almost no influence on the display screen. , It is obvious that these errors are accumulated by repeating the dubbing.

Therefore, when the above-mentioned encoded video signal is dubbed, if the above-mentioned re-modulation and demodulation of the helper signal are repeated, the helper signal in which the above-mentioned error is accumulated is copied, and the definition of the main signal of the video signal is fine. There is a problem in that such helper signal appears as a non-negligible disturbance on the display screen of the reproduced video signal due to the nature of the auxiliary signal for improving the frequency.

[0016]

In order to solve the above problems, the present invention provides a signal processing circuit having the following configurations (1) to (3).

(1) A first aspect of the present invention transmits a series of high-definition video signals having an aspect ratio different from that of a predetermined broadcasting system, has compatibility with the predetermined broadcasting system, and has the high quality. A demodulation auxiliary signal obtained by demodulating the modulated auxiliary signal included in the video signal, comprising a modulation auxiliary signal obtained by modulating an auxiliary signal including at least a main signal and video additional information, which constitutes a quality video signal, in a required manner. A dubbing device for dubbing a recorded signal by performing a predetermined signal recording process on each of a luminance signal component and a color signal component of the video signal by adding to the main signal, and performing the predetermined signal recording process. The reproduced signal is reproduced as a reproduced signal without modulating the auxiliary signal contained in the recorded and recorded signal, and the reproduced signal is reproduced without demodulating the auxiliary signal contained in the reproduced signal. The present invention provides a dubbing device characterized by performing dubbing by recording the.

(2) The second invention transmits a series of high-definition video signals having an aspect ratio different from the aspect ratio of the predetermined broadcasting system, has compatibility with the predetermined broadcasting system, and A demodulation auxiliary signal obtained by demodulating the modulated auxiliary signal contained in the video signal, comprising a modulation auxiliary signal obtained by modulating an auxiliary signal containing at least a main signal and video additional information that constitutes a quality video signal in a required manner. A dubbing device for dubbing a recorded signal by performing a predetermined signal recording process on a luminance signal component and a color signal component of the video signal by adding to the main signal, and performing the predetermined signal recording process. The signal reproducing means 1 for reproducing the recorded and recorded signal, and the demodulation auxiliary signal included in the reproduced signal reproduced by the signal reproducing means 1 for re-modulation to reproduce the same mode as the modulation auxiliary signal at the time of transmission. Remodulation means 2 for outputting a modulation auxiliary signal, first switching means 3 for switching and outputting the main signal of the reproduction signal, and the remodulation auxiliary signal, and a signal output by the first switching means 3. Demodulation means 6 for demodulating the re-modulation auxiliary signal contained in the above-mentioned demodulation auxiliary signal and outputting a demodulation auxiliary signal in the same manner as the demodulation auxiliary signal; a main signal of the signal output by the first switching means 3; Second switching means 7 for switching and outputting signals respectively, and the second switching means 7
Signal recording means 10 for performing the signal recording processing on the signal output by the first recording means 10 and recording the signal.
Outputs the reproduction signal from the signal reproduction means 1 as it is, and supplies it to the second switching means 7 without passing through the re-modulation means 2, and the second switching means 7
Provides a dubbing device characterized in that the output signal from the first switching means 3 is directly switched and output to be supplied to the signal recording means without passing through the demodulation means 6 to perform dubbing. is there.

(3) According to a third aspect of the present invention, the high-quality video signal is obtained by directly supplying the luminance signal component and the chrominance signal component constituting the signal reproduced from the signal reproducing means 1 to the signal recording means 10, respectively. The dubbing apparatus according to (2) above is provided for dubbing.

[0020]

1 is a diagram for explaining a signal reproduction processing system of a dubbing apparatus according to the present invention, FIG. 2 is a diagram for explaining a signal recording processing system of a dubbing apparatus according to the present invention, and FIG. FIG. 4 is a diagram for explaining another signal reproduction processing system of the dubbing device, and FIG. 4 is a diagram for explaining another signal recording processing system of the dubbing device according to the present invention. Hereinafter, a signal processing circuit according to the present invention will be described with reference to the drawings. The same components as those described above are designated by the same reference numerals, and the description thereof will be omitted.

As shown in FIG. 1, the signal reproduction processing system of the dubbing apparatus according to the present invention has a structure complementary to the above-mentioned VTR signal recording processing means 16 and records the recorded signal as a luminance signal component and a color signal component. VTR signal reproduction processing means 1 for frequency-demultiplexing and demodulating and reproducing, helper remodulation circuit 2 for remodulating a helper signal from the reproduction luminance signal output from the VTR signal reproduction processing means 1, and a third control signal described later. Based on this, the helper signal re-modulated by the helper re-modulation circuit 1 and the above-mentioned reproduction luminance signal are switched at a predetermined timing, and a reproduction luminance signal including a helper signal area and a luminance information area other than that is generated within one horizontal period. The first changeover switch 3 for outputting, the reproduction luminance signal outputted from the first changeover switch 3, and the reproduction luminance signal outputted by the VTR signal reproduction processing means 1 described above. And an adder 5 for generating outputs an encoded video signal by adding the color signals.

Here, the above-mentioned third control signal is, for example, a control signal for a user to input an instruction to an input means (not shown) to interlock the present signal reproduction processing system and the present signal recording processing system. For example, a third control signal is output (supplied to each of switch means 4 and 8 described later) in response to a dubbing operation instruction given to the input means by the user,
As a result, the present signal reproduction processing system and the present signal recording processing system start operating.

Now, the above VTR signal reproduction processing means 1
Has a configuration similar to that of a known VTR signal reproduction system, for example.
Is similar to. Then, the VTR signal reproduction processing means 1 outputs a reproduction luminance signal and a reproduction color signal.

As described above, since the reproduced luminance signal contains the helper signal component which is converted into the baseband signal mode so as not to impair the frequency band, this reproduced luminance signal is supplied to the helper remodulation circuit 2. Supply. The helper remodulation circuit 2 is the helper remodulation circuit 18 described above.
The same remodulation helper signal as the modulation helper signal that was AM-modulated at the time of transmission is obtained. Then, the re-modulation helper signal and the above-mentioned reproduction luminance signal are supplied to the changeover terminal a and the changeover terminal b of the first changeover switch 3, respectively.

Here, the above-mentioned third control signal is the first
Is supplied to the switch means 4 for controlling the changeover switch 3 of FIG. The switch means 4 supplies the control signal ee normally supplied to the terminal e (that is, when dubbing is not performed) to the first changeover switch 3, and when the third control signal is input (that is, When performing dubbing), the control signal ff supplied to the terminal f is supplied to the first changeover switch 3.

The control signal ee is the same signal as the second control signal described above, and is supplied to the first changeover switch 3 so that when the dubbing is not performed, the signal reproduction described in the prior art is performed. It operates similarly to the processing system.

The control signal ff is, for example, a control signal for fixedly connecting the output of the first changeover switch 3 and the terminal b, and when this is supplied to the first changeover switch 3, dubbing is performed. When performing, the reproduction luminance signal from the VTR signal reproduction processing means 1 supplied to the terminal b is directly output to the adder 5. That is, when the above control signal is supplied to the switch means 4, the first changeover switch 3
Outputs the reproduction luminance signal output from the VTR signal reproduction processing system 1 to the adder 5 as it is.

On the other hand, the reproduced color signal is supplied to the adder 5,
In the adder 5, the reproduction luminance signal and the reproduction color signal output from the first changeover switch 3 are added to generate and output an encoded video signal. The encoded video signal generated and output from the adder 5 is supplied to the helper demodulation circuit 6 and the second changeover switch 7 shown in FIG.

Now, as shown in FIG. 2, the signal recording processing system of the dubbing apparatus according to the present invention includes a helper demodulating circuit 6 and a helper demodulating circuit 6 for demodulating the helper signal from the encoded video signal supplied from the adder 5. A video including a helper signal demodulated by the demodulation circuit 6 and video information, which is the main signal of the encoded video signal, is switched at a predetermined timing and includes a helper signal area and other video information area within one horizontal period. A second selector switch 7 for outputting a signal, and a Y signal for separating and outputting a luminance signal and a color signal from the video signal output from the second selector switch 7, respectively.
VTR signal recording processing means 10 for applying predetermined signal recording processing to the recording luminance signal and the recording color signal separated and output by the C separation circuit 9 and the YC separation circuit 9 and recording them on a magnetic recording medium such as a magnetic tape. Composed of and. Here, this is almost the same as the signal recording processing system shown in FIG. 5 to which the switch means 8 is added, and the operation of the switch means 8 will be described below.

First, the switch means 8 supplies the control signal gg which is normally supplied to the terminal g (that is, when dubbing is not performed) to the second changeover switch 7, and the above-mentioned third control signal is supplied. When input (that is, when performing dubbing), the control signal hh supplied to the terminal h is supplied to the second changeover switch 7.

The control signal gg is the same signal as the above-mentioned first control signal, and is supplied to the second changeover switch 7 so that when dubbing is not performed, the signal recording described in the prior art is performed. It operates similarly to the processing system.

The control signal hh is, for example, a control signal for fixedly connecting the output of the second changeover switch 7 and the terminal d, and when this is supplied to the second changeover switch 7, dubbing is performed. When performing, the encoded video signal from the adder 5 supplied to the terminal d is directly output to the YC separation circuit 9. That is, when the above control signal is supplied to the switch means 8, the second changeover switch 7 outputs the encoded video signal from the adder 5 as it is to the YC separation circuit 9.

Thus, for example, when the user gives a dubbing operation instruction, the control signal generated and output together with this operation instruction is supplied to the switch means 4 and 8 as described above.
The first changeover switch 3 outputs the reproduction luminance signal reproduced from the VTR signal reproduction processing system 1 as it is, and the second changeover switch 7 encodes the reproduction luminance signal and the reproduction color signal. The video signal is output as it is by switching and supplied to the YC separation circuit 9.

The recording luminance signal and recording color signal YC-separated and output in the YC separation circuit 9 are supplied to the VTR signal recording processing system 10, and as described above, predetermined signal processing is performed on the luminance signal and the color signal. Then, it is recorded on a magnetic recording medium such as a magnetic tape through a magnetic rotary head (not shown).

Next, another embodiment of the above-mentioned dubbing apparatus according to the present invention will be described. The VTR described in FIG.
While the reproduction luminance signal and the reproduction color signal are generated and output in the signal reproduction processing system, in this embodiment, as shown in FIG. 3, the signal reproduction processing system causes the reproduction luminance (Y) signal and the reproduction color ( C) Output signals individually.

It is known that, when performing dubbing, in order to prevent image deterioration as much as possible, for example, a luminance signal and a color signal are transmitted separately. Therefore, the output of the first changeover switch 3 is changed over to the terminal b based on the above-mentioned control signal, and the reproduction luminance signal is outputted as it is. At this time, for example, by supplying the reproduction luminance signal and the reproduction color signal directly to the signal recording processing means 10, the adder 5 described above is provided.
It is possible to record a good reproduction luminance signal and a good reproduction color signal without going through the YC separation circuit 9.

For example, as shown in FIG. 4, the signal recording processing system is provided with switch means 11 and 12 for supplying the above-mentioned reproduction luminance signal and reproduction color signal. The above-mentioned reproduction luminance signal and reproduction color signal are switched by the switch means 11,
12 terminals i and l are supplied respectively. On the other hand, the encoded video signal output from the adder 5 passes through the helper demodulation circuit 6, the second changeover switch 7 and the YC separation circuit 9 as described above, and the luminance signal separated and output by the YC separation circuit 9 is output. And the switch means 1 for the color signal described above.
They are supplied to terminals j and k of terminals 1 and 12, respectively.

For example, when the signal reproduction processing system shown in FIG. 3 and the signal recording processing system shown in FIG. 4 are used together, the reproduction luminance signal and the color signal are directly supplied to the signal recording processing system. The switch means 8 described in 2 can be omitted.

Thus, the encoded video signal including the helper signal does not undergo modulation and demodulation of the helper signal (that is, does not go through the signal paths i and iii described above). Since there is no amplitude error or time error, even if the dubbing is repeated, if the helper signal is re-modulated and demodulated repeatedly, the helper signal in which the above error is accumulated is not copied, and a good encoding is always performed. Video signals can be copied.

In FIG. 3, the switch means 4 switches between the re-modulated helper signal in the normal state (no dubbing is instructed) and the reproduced luminance signal to output the reproduced luminance signal for transmission. Has been
For example, it goes without saying that this re-modulated helper signal may be transmitted using a color signal transmission path.

[0041]

As described above, according to the structure of the present invention described in claim 1, a series of high-definition video signals having an aspect ratio different from the aspect ratio of the predetermined broadcasting system are transmitted, and the predetermined broadcasting system is used. Dubbing apparatus for dubbing a video signal having a modulated auxiliary signal obtained by modulating an auxiliary signal including at least a main signal and video additional information that composes the high-quality video signal in a required manner In the above, the reproduction signal is recorded as it is without re-modulating and demodulating the auxiliary signal for reproducing and recording the video signal at the time of dubbing, which occurs in the signal path at the time of re-modulating and demodulating the auxiliary signal. Since the amplitude error and the time error do not occur, it is necessary to always dubb the good video signal in which the amplitude error and the time error are not accumulated even if the dubbing is repeated. There is an effect that can be.

As described above, according to the configuration of the present invention as set forth in claim 2, in addition to the effects described above, there is an effect that the dubbing apparatus for a high-quality video signal described above can be provided with a simple structure.

As described above, according to the structure of the present invention as set forth in claim 3, in addition to the above effects, the high-quality video signal reproduced from the signal reproducing means is converted into a luminance (Y) signal and a color (C) signal. Since it can be separated and transmitted, an adder for combining the luminance signal and the chrominance signal to output a composite video signal, and a separate luminance signal and chrominance signal for recording the composite video signal. Since there is no need to go through the YC separation circuit, it is possible to dubb a high-quality video signal with little image deterioration.

[Brief description of drawings]

FIG. 1 is a diagram for explaining a signal reproduction processing system of the present dubbing apparatus.

FIG. 2 is a diagram for explaining a signal recording processing system of the present dubbing apparatus.

FIG. 3 is a diagram for explaining another signal reproduction processing system of the present dubbing apparatus.

FIG. 4 is a diagram for explaining another signal recording processing system of the dubbing apparatus.

FIG. 5 is a diagram for explaining a PALplus type signal recording processing system.

FIG. 6 is a diagram for explaining a PALplus system signal reproduction processing system.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Signal reproducing means, 2 ... Remodulation means, 3 ... 1st switching means, 6 ... Demodulation means, 7 ... 2nd switching means, 10 ... Signal recording means.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication H04N 9/64 Z 9/80 H04N 9/80 A

Claims (3)

[Claims] At least a high-definition video signal that transmits a series of high-definition video signals having an aspect ratio different from an aspect ratio of the predetermined broadcasting system, and is compatible with the predetermined broadcasting system, and constitutes the high-definition video signal. A modulated auxiliary signal obtained by modulating an auxiliary signal containing a main signal and video additional information in a required manner is provided, and a demodulation auxiliary signal obtained by demodulating the modulated auxiliary signal included in the video signal is added to the main signal. A dubbing device for dubbing a signal recorded by performing a predetermined signal recording process on each of a luminance signal component and a color signal component of the video signal, which is included in the signal recorded by performing the predetermined signal recording process. By reproducing this signal as a reproduced signal without modulating the auxiliary signal, and recording the reproduced signal without demodulating the auxiliary signal contained in the reproduced signal. A dubbing device characterized by performing dubbing. 2. A high-definition video signal which transmits a series of high-definition video signals having an aspect ratio different from the aspect ratio of the predetermined broadcasting system and which is compatible with the predetermined broadcasting system and constitutes the high-definition video signal. A modulated auxiliary signal obtained by modulating an auxiliary signal containing a main signal and video additional information in a required manner is provided, and a demodulation auxiliary signal obtained by demodulating the modulated auxiliary signal included in the video signal is added to the main signal. A dubbing device for dubbing a signal recorded by performing a predetermined signal recording process on each of a luminance signal component and a color signal component of the video signal, and reproducing the recorded signal by performing the predetermined signal recording process. And a re-modulation auxiliary signal in the same form as the modulation auxiliary signal at the time of transmission by re-modulating the demodulation auxiliary signal included in the reproduction signal reproduced by the signal reproducing means. Modulating means, first switching means for switching and outputting the main signal of the reproduction signal and the re-modulation auxiliary signal, and demodulating the re-modulation auxiliary signal included in the signal output by the first switching means. Demodulation means for outputting a demodulation auxiliary signal in the same manner as the demodulation auxiliary signal, second switching means for switching and outputting the main signal of the signal output by the first switching means, and the demodulation auxiliary signal, respectively. And signal recording means for performing the signal recording processing on the signal output from the second switching means and recording the signal, wherein the first switching means directly outputs the reproduction signal from the signal reproduction means. To supply to the second switching means without passing through the re-modulation means,
The dubbing device is characterized in that the switching means switches the output signal from the first switching means as it is to supply it to the signal recording means without passing through the demodulating means to perform dubbing. 3. The high-quality video signal is dubbed by directly supplying a luminance signal component and a chrominance signal component constituting a signal reproduced by the signal reproducing means to the signal recording means, respectively. The dubbing apparatus according to 2.