JPS61252777A - Video signal recording and reproducing device - Google Patents

Abstract

PURPOSE:To improve S/N of both of a video signal for a recording monitor and a reproducing video signal from a recording medium by changing over a noise reducing circuit to a feeding circuit system of a video signal on recording and to a reproducing output circuit system of the video signal on reproducing. CONSTITUTION:A circuit 203 shows a change over circuit for changing over a video signal for a recording monitor and a reproducing video signal to a television monitor and outputting in according with a change over of recording and reproducing operation of a recording and reproducing means. On changing over a recording and reproducing change-over switch 17, a noise reducing circuit 18 is changed over and inserted to a feeding circuit system of the recording monitor video signal on recording and to the output circuit system of the reproducing video signal on reproducing. Thereby, noises of the monitor video signal and the reproducing video signal are reduced and the respective video signals pass through the noise reducing circuit only once, so that such a deterioration in a picture quality of the video signal as in the case of providing the noise reducing circuit in duplication in the side of the camera.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a video signal recording and reproducing method suitable for a portable V'l'R connected to a television camera for recording, particularly a camera-integrated V'J''R. Regarding equipment.

[Background of the invention]

Conventionally, in video equipment such as television cameras and VTRs, various noise reduction circuits have been used to improve S/1'J of video signals. One of them is, for example, a line noise cancellation method. This method cancels only the noise component contained in the video signal by taking advantage of the fact that while video signals generally have strong line correlation, noise has no line correlation. al, (b) shows its basic configuration.
, a video signal containing a noise component is input to an input terminal 1, and the input video signal is directly applied to a first subtracter 3 and a delay circuit 2 (where H is the horizontal scanning period of the video signal). is added to the subtracter 3 via the subtracter 3. As a result, the subtracter 3 receives the input video signal from the terminal 1 and the input video signal from the terminal 1.
The video signal before H is subtracted and output. The waveform of the input video signal and the video signal waveform 1H before it are based on their line correlation).

The waveforms are almost the same except for a slight time shift at the edge portion.On the other hand, the noise component waveforms included in these video signals do not have such line correlation. Therefore, in the subtracted output from the subtracter 3, the video signal waveforms are almost canceled out except for the edge portions;
Noise component waveforms are not canceled out. That is, the output of the subtracter 3 is only the noise component and the component at the edge portion of the video signal. The output of the subtracter 3 is then supplied to a limiter circuit 4. In the limiter circuit 4, the noise component having a relatively small amplitude passes through as it is, but the edge component of the video signal almost disappears. As a result, from the limiter circuit 4.

Mainly, only the noise component contained in the video signal is separated and extracted and output, and this noise component is attenuated to an appropriate level by an attenuator 5 and supplied to a subtracter 6 in the rear tube 2. be done. The second subtractor 6 is also supplied with the input video signal from the terminal 1, and the subtracter 6 subtracts the noise component from the input video signal, and sends the video signal with the noise component suppressed to the terminal. Output from 7.

FIG. 4 C#3) shows a modification of FIG. 4-), and the difference from FIG. The difference is that the feedback is fed back to the input side of the 1H delay circuit 2 via the adder 9, thereby making it possible to change the comb characteristic of the multi-circuit operation.
Since the circuit b) is completely similar to the circuit shown in FIG. 4-), its explanation will be omitted.

By the way, the above-mentioned video signal noise reduction means are as follows:
Conventionally, it has usually been provided individually for each video device such as a television camera or V'f'R. However, when considering the case where an imaging means such as a television camera and a recording/reproducing device such as a VTR are connected or integrated, it is costly to equip each of the imaging means and recording/reproducing device with noise reduction means separately. There is a problem in terms of performance, and there is also a problem in terms of deterioration in image quality. That is, in general, it is impossible for a video signal noise reduction means to purely reduce only the noise component.

As is clear from the example of the line noise canceling method described above, it is accompanied by some kind of deterioration of the video signal itself, that is, deterioration of the image quality, so noise reduction means are provided separately in both the imaging means and the recording/reproducing device. In this case, a large sA improvement effect can be obtained as a result of the noise reduction effect being performed redundantly.

This causes a problem in that image quality deterioration becomes excessive.

Further, providing a noise reduction method for both the imaging means and the recording/reproducing device becomes a factor that hinders miniaturization, especially when attempting to integrate the imaging means and the recording/reproducing device.

In order to solve these problems, first of all, it is conceivable to use only one noise reduction means in the entire video signal recording and reproducing system including the imaging means and the recording and reproducing device. Generally, in a combination of an imaging means and a recording/reproducing device, it is already known to unify functional elements common to both. For example, Japanese Unexamined Patent Publication No. 59-4276 discloses a time-base reference signal generating means (crystal oscillator) for controlling the operation of an imaging means and a time-base reference signal generating means for correcting the time base of a video signal in a recording/reproducing apparatus. A unified example is shown. However, when attempting to unify the noise reduction means described above, the following new problems arise. In other words, in order to effectively reduce noise in video signals obtained through the recording and playback systems of a recording/playback device, it is necessary to insert a noise reduction circuit into the playback system. If you insert it into .

It becomes impossible to reduce the noise in the recording monitor video signal that is sent directly from the imaging means to the monitor output system without going through the reproduction system.

[Purpose of the invention]

The object of the present invention is to eliminate the drawbacks of the above-mentioned prior art.

The noise reduction circuit is unified in the entire video signal recording and reproducing system including the imaging means, and as a result, there is no deterioration in image quality due to the redundant effect of the noise reduction circuit, and it is also low cost and advantageous for miniaturization. An object of the present invention is to provide a video signal recording and reproducing apparatus that can reduce noise in both a reproduced video signal from a recording medium and a recording monitor video signal during recording, despite the use of a single reduction circuit.

[Summary of the invention]

In order to achieve this object, the present invention provides a video signal recording and reproducing apparatus equipped with an imaging means (in the present invention, a video signal recording and reproducing apparatus equipped with an imaging means, in which the imaging means and the video signal recording and reproducing means are (This refers to a video signal recording and reproducing system that is used in an integrated manner and is interconnected.), a video signal noise reduction circuit is provided in only one VC on the recording and reproducing means side, and the noise reduction circuit performs recording during recording. The circuit system for transmitting video signals to the monitor means is configured to be switched and inserted into the reproduction output circuit system for video signals during playback, so that the video signal for recording monitor and the reproduced video signal from the recording medium are inserted. In addition to improving both problems without deteriorating the image quality due to the redundant effect of the noise reduction circuit, it also reduces the manufacturing cost of the device and reduces the cost of the device, which is especially necessary when integrating the imaging means and the recording/reproducing means. It is characterized by being able to achieve downsizing as well.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention in a video signal recording and reproducing apparatus such as a camera-integrated VTR. In the television camera section 201, 11 image sensors using solid-state image sensors or tubes, 12 a preamplifier for amplifying the output of the image sensor 11, 1
3 is a luminance signal processing circuit, 14-digit color signal (B-Y, R-Y
), and a chroma signal modulation circuit that encodes the 15-digit color signal into a chroma signal.

Since the configuration of the television camera portion 201 is already well known, detailed explanation thereof will be omitted.

The figure shows a recording and reproducing circuit system in the 202-digit recording and reproducing means (V'I'R in this embodiment). 22 is a luminance signal recording processing circuit that performs pre-emphasis, etc., and a 25/d luminance signal FM modulation circuit.

24 is a bypass filter that removes the unnecessary low frequency band of the FiFM luminance signal, 25 is a recording amplifier that mixes and amplifies the FM luminance signal and the low-frequency conversion chroma signal, and 33 is an ACC that makes the levels of the signals from the camera side uniform. circuit, 3
4-digit burst emphasis, chroma emphasis, etc. chroma signal recording processing circuit; 35 is a converter for converting the chroma signal into a reduced one; 36 is a low-pass filter for removing unnecessary components of the chroma signal converted to a low frequency; As described above, the low-pass converted chroma signal output from the low-pass filter 36 is mixed with the FM luminance signal output from the one-bypass filter 24 and amplified in the recording amplifier 25. The output of the recording amplifier 25 is supplied to the magnetic head 26a as a recording signal to the magnetic tape 27.

Further, in the recording and reproducing circuit system 202, 28 is a preamplifier that amplifies the reproduced signal from the magnetic head 26b, 29 is a bypass filter for extracting the FM luminance signal from the reproduced signal, and 30 is a constant level of the extracted FM luminance signal. 51 is a demodulation circuit that demodulates the jM luminance signal, a luminance signal reproduction processing circuit that performs processing such as de-emphasis to restore the pre-emphasis of the luminance signal during 32Fi recording, and a 37-digit preamplifier 2.
8 is a low-pass filter for extracting the low-frequency converted chroma signal from the reproduced signal, 38 is a converter for returning the extracted chroma signal to its original frequency (3.58 MHz), and 39 is used for recording. This is a chroma signal reproduction processing circuit that performs processing such as de-emphasis to restore the burst emphasis, chroma emphasis, etc. that have been performed.

Since the configuration of the recording/reproducing circuit system 202 as described above is also well known, detailed explanation thereof will be omitted.

Now, in FIG. 1, numeral 203 shows a switching circuit that switches and outputs a recording video signal and a playback video signal to a television monitor in accordance with the switching of the recording and reproducing operation of the recording and reproducing means. . In the switching circuit 203, 18 is a noise reduction circuit which is a feature of the present invention, and as is clear from the figure, only one noise reduction circuit is provided in the switching circuit 203. 1
7.4O#i recording/reproduction changeover switch, 19-digit luminance signal and chroma signal mixing circuit, 20 is an output terminal.

If the recording/reproducing means is currently performing a recording operation, the changeover switch 17.40 is switched to the terminal Reo side (position shown). Therefore, the television camera part 201
The luminance signal and chroma signal outputted from the luminance signal processing circuit 13 and the chroma signal modulation circuit 15 are inputted to the recording/reproducing circuit system 202 and recorded on the magnetic tape 27, and at the same time, Some of them are branched off as recording monitor (so-called E, E monitor) signals, the chroma signal is supplied to the mixing circuit 19 via the changeover switch 40, and the luminance signal is supplied to the mixing circuit 19 through the changeover switch 17 and the noise reduction circuit 18. , these are mixed and sent from the output terminal 20 to a television monitor (not shown).

On the other hand, during the playback operation of the recording and playback means, the selector switch 1
Since 7 and 40 are switched to PB@, the magnetic tape 27
The luminance signal (output of the luminance signal reproduction processing circuit 32) reproduced from the magnetic tape 27 is supplied to the mixing circuit 19 via the noise reduction circuit 18, and the chroma signal (output of the chroma signal reproduction processing circuit 39) also reproduced from the magnetic tape 27 is supplied to the mixing circuit 19 via the noise reduction circuit 18. output) are supplied to a mixing circuit 19, where they are mixed and output as a reproduced video signal from a terminal 20 to a television monitor.

As a result, as the recording/playback selector switch 17 is switched, the noise reduction circuit 18 is inserted into the recording monitor video signal output circuit system during recording, and into the playback video signal output circuit system during playback. It is possible to reduce the noise of both the monitor video signal and the reproduced video signal, and since each video signal only passes through the noise reduction circuit once, it is possible to reduce the noise of both the monitor video signal and the reproduced video signal. There is no deterioration in image quality of the video signal as would be the case if the camera side is also provided redundantly.

Note that, as the noise reduction circuit 18, for example, one based on the line noise canceling method described above can be used, but it goes without saying that the noise reduction circuit 18 is not necessarily limited to this.

FIG. 2 shows another embodiment of the invention. The difference between this embodiment and the embodiment shown in FIG. 1 is that in addition to the video signal input from the integrated television camera section (hereinafter referred to as the camera input video signal), the recording input signal to the VTR section is , a video signal from an external input terminal (hereinafter referred to as an external input video signal) can also be input.

In Fig. 2, 41//'i is an input terminal for an external video signal, and 42 is switched between recording an external human input video signal, recording a camera input video signal, or reproducing a video signal from a transducer. A selector switch that extracts the chroma signal from the 43 external input video signals, a
a, a5. a6h A changeover switch between an external human input video signal and a camera input video signal; 47 is an interface circuit with an external device such as a chainer or RP converter; It is a low-pass filter that extracts the

Since the other components in FIG. 2 are the same as those in FIG. 1, the same components are given the same numbers and their explanations will be omitted.

In the embodiment shown in FIG. 2, when recording the camera input video signal, the changeover switches 42, 44, 45, 46 and the recording/playback changeover switch 17.4o are all set to the position KhF shown in the figure.
), the operation is the same as that described in FIG. However, in this case, the recording monitor video signal output from the output terminal 20 via the changeover switch 42 is sent to an external television receiver via the RF converter of the external interface circuit 47.

On the other hand, when recording an external input video signal, the switching circuits 42, 44, 45, 46 are switched to positions opposite to those shown. Therefore, the external input video signal input from the terminal 41 is supplied to the low-pass filter 50 via the change-over switch 45 and the AGC circuit 16, and the low-pass filter 50 extracts the luminance signal from the external input video signal, and the change-over switch 46, the luminance signal is recorded in the same manner as in the case of FIG.
3 is also supplied, whereby the chroma signal in the external input video signal is extracted, and the chroma signal is sent to the selector switch 44.
The signal is supplied to a chroma signal recording circuit system similar to that shown in FIG.

Furthermore, in this embodiment, the external input video signal at the time of recording is A
The GC circuit 16 is supplied directly to the output terminal 20 via the changeover switch 42. With this configuration, it is possible to separate and process the external input video signal into a luminance signal and a chroma signal during recording. , you can view it on an external television receiver, etc., in its previous state. In this case, the projected image does not pass through the noise reduction circuit 18, but normally the external input video signal has a sufficient S/1.

Rather, a better image can be obtained without using the noise reduction circuit 18.

When reproducing the embodiment shown in FIG.
7.40 should be in the opposite position from the one shown in the diagram, selector switch 42
is at the illustrated position, and a reproduction operation similar to that described in the embodiment of FIG. 1 is performed.

In the embodiment shown in FIG. 2, the noise reduction circuit 18 is switched and inserted during recording when recording a camera input video signal and during playback of a recorded video signal, similar to the embodiment shown in FIG. Needless to say, the noise reduction effect is achieved.

FIG. 3 shows yet another embodiment of the invention. In this embodiment, the camera input video signal and the external input video signal are
The embodiment shown in FIG. 2 is similar to the embodiment shown in FIG. The signal and chroma signal are recombined via the same recording monitor circuit system used when recording the camera input video signal, and then displayed on an external television receiver, etc.
In this case, a feature is that it is possible to arbitrarily select whether or not to insert a noise reduction circuit into the recording monitor circuit system.

In FIG. 3, 48 is a low-pass filter or comb filter for separating and extracting the luminance signal from the external input video signal from the external input terminal 41, and 49 is a noise reduction circuit 18 in the recording monitor circuit system. This is a selection switch for selecting whether to insert or not. The other components in FIG. 3 are the same as those in FIG. 1 or 2.

Identical components are given the same numbers and their explanations will be omitted.

In the embodiment of FIG. 3, when recording camera input video signals, selector switches 17, 40, . Since At, 45 is in the illustrated position, and the selection switch 49 is normally selected in the illustrated position, the noise reduction circuit 18 is operated in the same manner as explained in FIGS. 1 and 2. A video signal for recording and monitoring can be obtained via the . .

On the other hand, when recording an external video signal, the chroma in the external input video signal that has been separated and extracted can be set by switching the changeover switch 44, 45t to the opposite position from the one shown in the figure. The signal and luminance signal are recorded and monitored in the same way as the camera input video signal. However, in this case, 1 normal 1 selection switch 49#
A position opposite to the position shown in i1 is selected, and as a result, the monitor output does not pass through the noise reduction circuit 18. However, if there is a lot of noise in the external input video signal, the selection switch 49 can be switched to the illustrated position to obtain a monitor output of the external input video signal via the noise reduction circuit 18, or conversely, the camera input video While recording the signal, if necessary, move the selection switch 49 to the opposite position from the one shown.

The recording monitor output of the camera input video signal can also be output without going through the noise reduction circuit 18.

Note that when reproducing the recorded video signal, the noise reduction circuit 18 can be activated by switching the recording/reproducing selector switch 17.40 to the position opposite to the illustrated position (reproducing side) and by always setting the selection switch 49 to the illustrated position. A reproduced video signal can be obtained through the

Now, in the video signal recording and reproducing apparatus described above, it is necessary that the timing relationship between the luminance signal and the chroma signal match at the recording output end to the recording medium and also match at the recording output end. Become. It is desirable that this timing relationship be the same at the output end of the camera unit, but in the case of a camera integrated type V'l'H, it is not necessarily necessary that the timing relationship be the same at the camera unit alone; for example, at the camera unit output end. A timing error of approximately ±a 2 as caused by accuracy errors in the black level clamp circuit for the luminance signal is allowed. Hereinafter, the timing relationship between the luminance signal and the chroma signal in the embodiment described in FIGS. 1 to 3 will be explained using FIGS. 5 to 11.

FIG. 5 is a diagram showing an example of the timing relationship between the luminance signal and the chroma signal in the embodiment of FIG. 1.

101 is the delay time of the luminance signal in the camera section, and 102 is the delay time of the chroma signal in the camera section, which is equivalent to two stages of chroma filters (well-known four-pass filters for R, G, and B outputs). Corresponds to the output o-lotus filter). In the example shown in Fig. 5, the timing of the luminance signal and the chroma signal are made to match at the output end of the camera section, so the delay time of 101 is adjusted to match the delay time of 102 of 0.6 μs. has been done. 10
3. Delay time of the chroma signal recording circuit system of the VTR section (mainly delay time due to the low-pass filter 36 in Figure 1)
and 104 is the delay time of the luminance signal recording circuit system of the VTR section (mainly the delay time caused by the low-pass filter or equalizer 21 in FIG. 1). In addition, in FIG. 5, the AGC circuit 16. is shown as a component corresponding to FIG. ACC circuit 33; mixing circuit 19 for mixing the luminance signal and chroma signal to obtain a video output for recording monitor (hereinafter referred to as IK ratio output); and magnetic head 26
Only the components shown are shown, and other components are omitted.

Now, in the example of FIG. 5, the delay time of 1o5 and the delay time of 104 are adjusted so that they each become α5ss as shown. Therefore, in the recording output to the magnetic head 26, the delay time between the luminance signal and the chroma signal is
Both agree with α6 pg + 0.5μ5 = 19-8,
Also, the delay time at the E,1 output terminal is cL6. Matches I18.

FIG. 6 shows another example of the timing relationship of the embodiment shown in FIG. It has become smaller to the limit value of a4-8, so
The delay time 104 in the V'l'R section is increased by Q, 5jst, and α2 is added to the luminance signal circuit system of the i, im output system.
Delay element 105 such as an equalizer having a delay time of #8
This is because we have established the following. In this way, the luminance signal delay time at the E and E outputs is Q, 4μs + 0.2s =
0.6 μB.

The delay time of the chroma signal at the E and E outputs corresponds to 1L6 μs. Also, at the recording output end, the delay time of the luminance signal is 0.
．． 4ug+α5sg=0.9#s, and the delay time of the chroma signal is 0.6μB+α3ss=0.9js, so both match.

FIG. 7 shows an example of still another timing relationship of the embodiment shown in FIG. In this example, the delay time 101 of the luminance signal in the camera section is increased to α8 μB, which is the allowable limit, contrary to the example shown in FIG.
In the TR section, the delay time 103 is set to Q, 2 μs, and the delay time 104 is set to almost zero, and
A delay element 109 of α2tsa is provided in the chroma signal circuit system of the &E output system. Therefore, in the E and E outputs, the luminance signal delay time is 0.8718, and the chroma signal delay time is α6μs + α2 Jll = 18IIIg, and similarly, in the recording output, the luminance signal and chroma signal delay times are both α8μB. It matches a lot.

FIG. 8 shows an example of the timing relationship between the luminance signal and the chroma signal in the embodiment of FIG. 2, and in the same figure, j! 1, 42, and 46 respectively correspond to the external video signal input terminal 41° external input video signal and camera input video signal changeover switch 42, 46 in FIG. It shows the delay time between the low-pass filter 50 and the band-pass filter 43 in FIG. 2 for extracting the middle luminance signal and chroma signal from the video signal. Other parts of Figure 8, No. 5
This is similar to that explained in the figure.

In the example of FIG. 8, as is clear from the figure, for the camera input video signal, the changeover switches 42 and 46 are switched to the camera side, so as in the case of FIG.
In both the E output and the recording output, the timing relationship between the luminance signal and the chroma signal is the same. Regarding the external input video signal, the changeover switches 42 and 46 are switched to the video side, and the EJ output is the external input video signal from the terminal 41 without being separated into a luminance signal and a chroma signal. These timing relationships naturally match, and the recording output has a luminance signal delay time of 0.8 μS due to 106, and a chroma signal delay time of 1 μS.
07, 103, and K = 05μB+13 or more = α8718, and the timings of both coincide. Note that for the delay time 104 exceeding 0.3, it is also possible to divide the delay time α8sa of 106 and use it for the same purpose.

9, FIG. 10, and FIG. 11 show three examples of the timing relationship between the luminance signal and the chroma signal in the embodiment of FIG. 3. In these figures, 10B indicates the delay time of the comb filter or low-pass filter 4B for extracting the luminance signal from the external input video signal in FIG.

Other components are the same as those described in FIGS. 5 to 8.

In the example of FIG. 9, the timing relationship of the camera input video signal is exactly the same as that of FIG. 5, so a description thereof will be omitted. Regarding the external input video signal from the terminal 41, the delay time of the E and E outputs is α5#8 for both the brightness and chroma signals, and the delay time of the recording output is 0°5 μs + α3fig for both the brightness and chroma signals. 0.8μB
matches.

In the example shown in FIG. 10, the timing relationship of camera input video signals is the same as that shown in FIG. 6, so a description thereof will be omitted. For external human input video signals, for E output, the luminance signal delay time is 0.3μs + 0゜2μs =
The delay time of 0.5 μs coincides with the chroma signal delay time of 0.5 μB. Regarding the recording output of external input video signals,
The delay time of the luminance signal is over 0.3μ8 + α5μ8 = α8,
Chroma signal delay time is 0.5μB + α5μB = α8s
Match with a.

In the example of FIG. 11, the timing relationship of the camera input video signals is the same as that of FIG. 7, so a description thereof will be omitted. Regarding the Ei and I outputs of external input video signals, the delay time of the luminance signal is α8 μs, and the delay time of the chroma signal is α6 μs + 0.2 μs = α8118. Also, regarding the recording output of the external input video signal, the luminance signal and The delay time with the chroma signal similarly matches.

〔Effect of the invention〕

As explained above, according to the present invention, in a video signal recording and reproducing apparatus equipped with an imaging means, only one video signal noise reduction circuit is provided on the recording and reproducing means side, and this one noise reduction circuit is used. Furthermore, it is possible to improve the image quality of both the recording monitor video signal and the reproduced video signal from the recording medium without deteriorating the image quality due to the redundant effect of the noise reduction circuit.

Moreover, since there is only one noise reduction circuit, it is possible to reduce the cost and miniaturize the device, and also achieve the miniaturization of the device that is required when integrating the imaging means and the recording/reproducing means. This makes it possible to provide an excellent video signal recording and reproducing device that eliminates the drawbacks of the prior art.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. FIG. 2 is a block diagram showing another embodiment of the invention, FIG. 3 is a block diagram showing still another embodiment of the invention, and FIG. 4 is a block diagram showing an example of a noise reduction circuit used in the invention. 5 to 7 are block diagrams showing examples of the timing relationship between the luminance signal and chroma signal in the embodiment of FIG. 1, and FIG. 8 is a block diagram showing an example of the timing relationship between the luminance signal and chroma signal in the embodiment of FIG. A block diagram showing an example of the timing relationship of
9 to 11 are block diagrams showing examples of the timing relationship between the luminance signal and the chroma signal in the embodiment of FIG. 3. 201... Television camera section, 202... Recording and reproducing circuit system, 206... Switching circuit, 17.40... Recording,
Regeneration selector switch, 18... Noise reduction circuit, 19.
...Brightness signal and chroma signal mixing circuit, 20...Output terminal, 26m, 26b...Magnetic head, 27...Magnetic tape. 41...Input terminal for external video signal, 42...Switch for recording external input video signal and camera input video signal or reproducing recorded signal, 43...Band pass filter (for extracting chroma signal) ), 44, 45.46...
・Switch between external input video signal and camera input video signal, 48.50...Low pass filter or comb filter (for brightness signal extraction). 49... Selection switch for selecting whether or not to insert a noise reduction circuit Fig. 4 Ca) (b> Fig. 5 J8ta

Claims (1)

[Claims] It comprises an imaging means, a recording/reproducing means for recording and reproducing the video signal on a recording medium while transmitting the video signal obtained from the imaging means to a recording monitor means, and a noise reduction circuit for reducing noise components of the video signal. In the video signal recording and reproducing apparatus, only one noise reduction circuit is provided on the recording and reproducing means side, and the noise reduction circuit is connected to the circuit system for transmitting the video signal to the recording monitor means during recording, and to the circuit system for transmitting the video signal to the recording monitor means during reproduction. A video signal recording and reproducing device characterized in that it is configured to be switched and inserted into a reproducing output circuit system.