JP2540516B2 - Camera integrated recording / playback device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a camera-integrated recording / reproducing apparatus.

[Conventional technology]

Conventionally, for example, in a camera-integrated VTR, as shown in FIG. 4, the camera unit is equipped with a fader device, but since the VTR playback system is not equipped with a fader device, the playback video signal is When trying to apply a fader, it was necessary to connect a video editing device having a fader function to the video output terminal V _OUT of the VTR. Also, with the conventional camera-integrated VTR, a video signal with a fader can be formed at the time of shooting, and it can be transmitted to the VTR section, but when playing back the video signal once recorded,
Even when a fader is applied, the video editing apparatus is used.

[Problems to be solved by the invention]

However, it is a camera-integrated type that can be easily carried and can be played back on the spot to check the recording status.
It is not desirable for the VTR to require a separate circuit device, even if the circuit device is small.

On the other hand, it is conceivable to incorporate a fader circuit into the video signal reproduction system of the camera-integrated VTR, but in this case, in addition to this, a sync signal separation circuit, a video signal attenuation circuit, and a sync signal and video signal adder. Must be provided, which increases the complexity of the circuit and increases the manufacturing cost.

Therefore, the present invention not only adds a fader effect to an image picked up by a camera and records it, but also does not add a fader effect to an image recorded on a recording medium, without causing a circuit complexity and an increase in manufacturing cost. It is an object of the present invention to provide a camera-integrated recording / reproducing device capable of applying and outputting.

[Means for solving problems]

A camera-integrated recording / reproducing apparatus according to the present invention includes a camera unit that captures an image of a subject and generates a video signal corresponding to the captured subject image, and a fader unit that performs fader processing on the input video signal and outputs the result. Recording processing means for recording the input video signal to record it on a recording medium, reproduction processing means for reproducing and outputting the recording video signal recorded on the recording medium, and output from the reproduction processing means. And a video signal converting means for converting and reproducing the reproduced video signal into the same signal form as the video signal output from the camera means, an output means for externally outputting the input video signal, and Supplying a video signal output from the camera means to the fader means and supplying a video signal output from the fader means to the recording processing means, And a flow path switching means for supplying the video signal output from the video signal conversion means to the fader means and supplying the video signal output from the fader means to the output means in the raw mode. Is characterized by.

[Action]

With the above-mentioned configuration, the reproduction video signal reproduced from the recording medium in the reproduction mode is supplied to the camera means by the video signal conversion means with respect to the fader means for applying the fader effect to the video signal output from the camera means in the shooting recording mode. It is supplied after being converted into the same signal form as the video signal output from. As a result, it is possible not only to add a fader effect to an image picked up by a camera and record it, but also to output an image reproduced from a recording medium with a fader effect without causing a circuit complexity and an increase in manufacturing cost. You can

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Although the video signal described here is based on the NTSC system, the present invention is not limited to the other system, for example, the French-Soviet Union.
For SECAM system, PAL system such as Germany / UK,
It is applicable in principle.

FIG. 1 is a block diagram showing the configuration of an embodiment in which both the luminance signal (Y signal) and the carrier color signal (C signal) of the reproduced video signal can be faded. Figure 2 shows
The general structure of the camera part of a camera-integrated VTR is shown below. Second
In the figure, 10 is a subject, 12 is a photographic lens, 14 is an image pickup device such as a CCD, and 16 is a luminance signal (Y signal) and two color difference signals RY and BY from an electric signal from the image pickup device 14. It is a video signal conversion circuit. Image sensor 14 shown in FIG.
And the configuration and function of the video signal conversion circuit 16 are known,
Further, since it is not an important element for the present invention, further explanation is omitted.

Referring to FIG. 1, the Y signal from the video signal conversion circuit 16 is the first terminal 20a of the single-pole double-throw channel changeover switch 20.
Connect to. The common pole 20c of the switch 20 is connected to the input of a sync signal separation circuit 22 that separates the sync signal from the Y signal. The sync signal separation circuit 22
On the line 26 and Y signal (or
A signal excluding the synchronizing signal from the Y signal) is output. The signal on line 26 is input to fader 28. Fader 28
Is the fader control signal (ON / OF
In accordance with F), the signal on line 26 is faded and output on line 30.

Two color difference signals RY, B- from the video signal conversion circuit 16
Y is input to the quadrature two-phase modulation circuit 32. This modulation circuit 32
The 3.58 MHz subcarrier is also input to the local oscillator circuit 34 from the local oscillator circuit 34.
Two color difference signals RY and BY are quadrature-phase-modulated to form a carrier color signal, which is output on line 36. The quadrature two-phase modulation circuit 32 in this embodiment has a general function in the technical field of video signal processing and has little relation to the content of the present invention.
Further description will be omitted. The line 36 is connected to the first terminal 38a of the single-pole double-throw switch 38 for switching the flow path. The common pole 38c of switch 38 connects to the input of the second fader 40. The fader 40, like the fader 28, appropriately performs fader processing on the input signal in accordance with the fader control signal on the control line 29, and outputs it on the line 42.

The faders 28 and 40 are provided as standard in the camera unit for fader processing at the time of shooting.

Line 24, line 30 and line 42 connect to the input of adder 44, which adds the sync signal on line 24, line 30.
The above Y signal and the carrier color signal on the line 42 are added and combined to output the NTSC composite video signal on the output line 46. Line 46 is a video output terminal for an external monitor
Connect to V _OUT and to the input of VTR recording circuit system 50.

This VTR recording circuit system 50 converts the NTSC video signal to the luminance signal FM.
This is a known general circuit for recording on a magnetic tape by a modulation / color signal low frequency conversion multiplex recording system. Therefore, in the drawing,
Only the basic circuit configuration is shown. Specifically,
The NTSC composite video signal on line 46 is f _c = 2.5 to 3
The Y signal component is extracted together with the synchronization signal through a low pass filter (LPF) 52 of about MHz, and an automatic gain adjustment circuit (AGC) 54
Supply to. The AGC 54 automatically adjusts the pp value of the amplitude of the Y signal component to match the reference value. The FM modulation circuit 56 is
The Y signal component from the AGC 54 is converted into a specified FM signal. FM
Pre-emphasis is usually performed during modulation.

Further, the band-pass filter (BPF) 58 passes 3.58 ± 0.5 MHz and extracts a C signal component of 3.58 MHz. The color signal amplitude automatic adjustment circuit (ACC) 60 compares the amplitude of the color burst signal, which should always be constant, with the reference signal,
The pp value of the C signal component from the BPF 58 is controlled to the reference value. The frequency conversion circuit 62 uses the local oscillator to specify the C signal component of 3.58 MHz from the ACC60 to the specified low frequency range (eg, 688 KHz for β system, 629 KHz for VHS system, 8 mm
In the video system, it converts to 743KHz).

The adder 64 adds and mixes the FM signal from the FM modulation circuit 56 and the low-frequency carrier color signal from the frequency conversion circuit 62 at a predetermined ratio, and the multiplexed signal is recorded by the recording head 66 on the magnetic tape 68.
Is magnetically recorded.

70 is a VTR reproducing circuit system corresponding to the VTR recording circuit system 50, and the reproducing circuit system 70 itself shown is also known as a reproducing circuit in a luminance signal FM modulation / color signal low frequency conversion multiplex recording system of an NTSC video signal. , Only basic circuit elements are shown in the drawings. From the signal reproduced from the magnetic tape 68 using the reproducing head 72 (may also be used as the recording head 66),
The high-pass filter (HPF) 74 extracts the FM signal component corresponding to the Y signal. The output of the HPF 74 is demodulated into a Y signal by the FM demodulation circuit 76 and output on the line 78.

A low-pass filter (LP
F) 80 extracts the low-frequency carrier color signal component. The output of the LPF80 is applied to the frequency conversion circuit 82, and this conversion circuit 82
Under the control of the local oscillator circuit 84 and the APC and AFC circuit 86, the low frequency carrier color signal from the LPF 80 is frequency-converted into a carrier color signal of 3.85 MHz, and the carrier color signal is sent out on the line 88. The APC and AFC circuit 86 is a known circuit that automatically controls the phase and frequency of color signals, receives the output of the frequency conversion circuit 82, and
The horizontal synchronizing signal of the reproduced video signal is extracted and used from the output (Y signal) of the demodulation circuit 76.

In the playback circuit system 70, in addition to this, dropout correction,
Although time axis correction and the like are performed, they are not directly related to the present invention, and thus the description thereof will be omitted.

The line 78 of the reproduction circuit system 70 is the second terminal of the switch 20.
20b, line 88 is the second terminal 38b of switch 38
Connect to.

 Next, the operation of the embodiment shown in FIG. 1 will be described.

First, in the photographing / recording operation mode, the switches 20 and 38 have their common poles 20c and 38c connected to the first terminals 20a and 38a, respectively. In this operation mode, the video signal converting circuit 16 is sending a video signal of the subject, and the Y signal is
The sync signal separation circuit 22 separates the sync signal, and the fader 28 performs fader processing according to the fader control signal on the line 29. The quadrature two-phase modulation circuit 36 is an image conversion circuit.
The sub-carriers of the oscillation circuit 34 are quadrature two-phase modulated by the color difference signals R-Y and B-Y from 16 and sent out on the line 36. line
The carrier color signal on 36 is passed through switch 38 to fader 40
To enter. Fader 40, like fader 28,
According to the fader control signal on the line 29, appropriate fader processing is performed and the result is supplied to the adder 44.

The adder 46 includes the sync signal from the sync signal separation circuit 22 and
The Y signal component from the fader 28 and the C signal component from the fader 40 are mixed and added, and the composite video signal is sent out on the line 46. This composite video signal is supplied to the VTR recording circuit system 50, FM-modulated and low-frequency converted by a known method, and then recorded on the magnetic tape by the recording head 66.
68 magnetically recorded. Also, this composite video signal on line 46 is output from V _OUT to an external monitor.

In playback mode, switches 20 and 38 are
The common poles 20c, 38c are connected to the second terminals 20b, 38b. The switches 20 and 38 are set to switch in this way in conjunction with the selection operation of the reproduction operation mode. Magnetic tape 68 in this state
When the signal is reproduced, the reproduction circuit system 70 uses the reproduction signal from the reproduction head 72 as a luminance signal (Y signal) and a carrier color signal (C signal).
Are restored and sent on lines 78 and 88, respectively.

The reproduced Y signal on the line 78 is supplied to the sync separation circuit 22 via the switch 20, and is appropriately faded by the fader 28 as in the case of the Y signal from the video conversion circuit 16 in the recording mode. To be done. Also, the reproduced C signal on the line 88 is supplied to the fader 40 via the switch 38, where it is appropriately faded. The output of both faders 28 and 40 and the sync signal of the playback Y signal adder 4
They are added together in 4 and output from the video output terminal V _OUT to the external monitor.

Although FIG. 1 shows an example in which fader processing is performed on both the reproduction luminance signal and the reproduction color signal, the fader processing may be performed only on the reproduction luminance signal. At that time, the switch 38 may be omitted. The line 36 may be directly connected to the fader 40, and the line 88 may be connected to the adder 44.

FIG. 3 shows another embodiment in which a reproduced color signal is once demodulated into a color difference signal and fader processing can be performed at the stage of the color difference signal. However, the same members as those in FIG. 1 are designated by the same reference numerals.

Faders 94 and 96 are connected in front of the quadrature two-phase modulation circuit for fader processing at the color difference signal stage. The input of the fader 94 is connected to the common pole 90c of a flow path changeover switch 90 similar to the flow path changeover switch 20, and its first terminal 9
0a is connected to the RY signal from the video signal conversion circuit 16. The input of the other fader 94 is the flow path selector switch 92.
, The first terminal 92a of which is connected to the BY signal from the video signal conversion circuit 16. Both faders
94 and 96 are controlled by the fader control signal on line 29.

The output of the quadrature two-phase modulation circuit 32 is directly connected to the input of the adder 46. A flow path changeover switch 98 is connected between the modulation circuit 32 and the oscillation circuit 34 so that the subcarrier (particularly its phase information) from the oscillation circuit 84 can be used during reproduction. That is, the common pole 98c of the switch 98 is connected to the subcarrier input of the modulation circuit, the first terminal 98a is connected to the oscillation circuit 34, and the second terminal 98b is connected to the output of the oscillation circuit 84 of the reproduction circuit system 70.

The carrier color signal on the line 88 is returned by the demodulation circuit 100 to two color difference signals RY and BY. The RY signal of the demodulation circuit 100 is connected to the second terminal 90b of the switch 90, and the BY signal is connected to the second terminal 92b of the switch 92.

In the embodiment of FIG. 3, in the photographing and recording operation mode, the switches 20, 90, 92, 98 have common poles 20c, 90c, 92c, 98c respectively connected to the first terminals 20a, 90a, 92a, 98a, and are illustrated. Is in a state.
Therefore, the color signal components of the photographed video signal are faded at the stage of the color difference signal, and the video signal is recorded on the magnetic tape 68 by the VTR recording circuit system 50 as in the case of the embodiment of FIG.

On the other hand, in playback mode, switches 20, 90, 92, 98
The common poles 20c, 90c, 92c, 98c are the second terminals 20b, 90b, 92, respectively.
Connect to b and 98b. The reproduction Y signal from the reproduction circuit system 70 is
The sync signal separation circuit 22 is connected via the line 78 and the switch 20.
Is input to Further, the reproduced carrier color signal on the line 88 is returned to the color difference signal by the demodulation circuit 100, and the color difference signal is input to the faders 94 and 96 via the switches 90 and 92, respectively. The quadrature two-phase modulation circuit 32 modulates the subcarriers from the oscillation circuit 84 of the reproduction circuit system 70 with the outputs of the faders 94 and 96, that is, the reproduction color difference signals, and supplies them to the adder 44.
The adder 44 adds and mixes the reproduction luminance signal and the reproduction color signal that have been fader processed by the faders 28, 94 and 96, and
Form an SC composite video signal. This composite video signal is supplied to the external monitor from the video output terminal V _OUT .

A suitable effect can be expected only by adding a fade process for the luminance signal component of the reproduced video signal, but it is preferable to add a fader process for the color signal component at the same time as a reproduced image. In particular, if fader processing is added at the stage of the color difference signals as in the embodiment of FIG. 3, the color balance of the reproduced image becomes extremely good.
It is considered that color balance will be an important factor for fader processing as the definition of television images becomes higher in the future, so it is very useful to process each color component of the image in a well-balanced manner.

When the photographed video signal and the reproduced video signal are once separated into a luminance signal and a color signal and then recombined after predetermined signal processing, the phase relationship between the luminance signal and the color signal must be kept constant. It is needless to say that a delay circuit for such a phase adjustment is provided at an appropriate place, though not shown.

〔The invention's effect〕

As described above, according to the present invention, the video signal reproduced from the recording medium in the reproduction mode is supplied to the fader means for applying the fader effect to the video signal output from the camera means in the shooting and recording mode. Since the converting means converts and supplies the same signal form as the video signal output from the camera means, the circuit is not complicated and the manufacturing cost is not incurred. It is possible to provide a camera-integrated recording / reproducing device having a function of not only applying a fader effect to a recorded image for recording but also applying a fader effect to an image reproduced from a recording medium and outputting the same.

[Brief description of drawings]

FIG. 1 is a block diagram of a first embodiment of the present invention,
FIG. 2 is a diagram showing a general configuration of an optical system and a photoelectric conversion system of a camera unit of a camera-integrated VTR. FIG. 3 is a block diagram showing another embodiment of the present invention. FIG. 4 is a block diagram showing the basic configuration of a conventional camera-integrated VTR. 10 …… Subject, 12 …… Shooting lens 14 …… Image sensor, 16 …… Building signal conversion circuit 20 …… Flow path selector switch, 22 …… Synchronous signal separation circuit, 2
4,26 …… line, 28 …… fader, 29,30 …… line, 32 …… quadrature two-phase modulation circuit, 34 …… oscillation circuit, 36 ……
Line, 38 ... Flow path selector switch, 40 ... Fader,
42 …… line, 44 …… adder, 50 …… VTR recording circuit system, 5
2 …… LPF, 54 …… AGC, 56 …… FM modulation circuit, 58 …… BPF 60 …… ACC, 62 …… Frequency conversion circuit, 64 …… Adder, 66
…… Recording head 68 …… Magnetic tape, 70 …… VTR playback circuit system, 72 …… Playback head, 74 …… HPF 76 …… FM demodulation circuit, 78 …… Line 80 …… LPF, 82 …… Frequency conversion circuit 84 …… Local oscillator circuit, 86 …… APC and AFC circuit, 88 ……
…line

Front page continuation (72) Minor Noji Minoru Minamoto 770 Shimonoge, Takatsu-ku, Kawasaki City Canon Inc. Tamagawa Business Office (72) Inventor Susumu Kazuki 770 Shimonoge, Takatsu-ku, Kawasaki City Canon Inc. Tamagawa Business Office (72) Inventor Hirohisa Takahashi 770 Shimonoge, Takatsu-ku, Kawasaki-shi Canon Inc. Tamagawa Plant (72) Inventor Katsuji Yoshimura 770 Shimonoge, Takatsu-ku Kawasaki-shi Canon Inc. Tamagawa Plant (72) Inventor Tomohiko Sasaya 3 Shimomaruko Ota-ku, Tokyo Canon No. 30-2 Canon Inc. (56) References JP-A-56-68067 (JP, A) SAIKAI Sho-49-130729 (JP, U)

Claims (4)

(57) [Claims] 1. A camera means for picking up an image of a subject and generating a video signal corresponding to the picked-up subject image, a fader means for performing fader processing on the input video signal, and outputting the input video signal. Recording processing means for performing recording processing and recording on a recording medium, and reproducing a recorded video signal recorded on the recording medium,
The reproduction processing means for outputting, the reproduction video signal output from the reproduction processing means for converting into a same signal form as the video signal output from the camera means, and outputting the video signal, and the input video signal. Output means for outputting to the outside, and in the case of the photographing recording mode, the video signal output from the camera means is supplied to the fader means, and the video signal output from the fader means is supplied to the recording processing means, Flow path switching means for supplying the video signal output from the video signal converting means to the fader means and supplying the video signal output from the fader means to the output means in the reproduction mode. A camera-integrated recording / playback device characterized by: 2. A brightness signal component and a color signal component included in a video signal are separately input to the fader means, and the fader means performs fader processing on the input brightness signal component and is input. The camera-integrated recording / reproducing apparatus according to claim 1, wherein the color signal component is not subjected to the fader processing, but is added to the luminance signal component subjected to the fader processing and output. 3. A brightness signal component and a chrominance signal component included in a video signal are separately input to the fader means, and the fader means performs fader processing on the input brightness signal component and outputs the result. 1 fader circuit, a fader process is applied to the input color signal component, the second fader circuit for outputting, and the output signal of the second fader circuit is added to the output signal of the first fader circuit, The camera-integrated recording / reproducing apparatus according to claim 1, comprising an adding circuit for outputting. 4. A luminance signal component, a first color difference signal component and a second color difference signal component included in a video signal are separately input to the fader means, and the fader means is a fader to the input luminance signal component. First to perform processing and output
And a second fader circuit for performing fader processing on the input first color difference signal component and outputting the same, and a third fader circuit for performing fader processing on the input second color difference signal component and outputting the same A carrier color signal forming circuit that forms a carrier color signal from the output signals of the second fader circuit and the third fader circuit; and an output signal of the carrier color signal forming circuit as an output signal of the first fader circuit. And add. The camera-integrated recording / reproducing apparatus according to claim 1, comprising an adding circuit for outputting.