JP3056596B2 - Still / movie video camera and video signal generation method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a still / movie video camera for performing still playback and movie playback from a video signal obtained by continuously photographing a subject, and a video signal generation method thereof.

[0002]

2. Description of the Related Art Generally, a video camera shoots at a shutter speed of 1/60 second. For this reason, in the case of still reproduction of one frame in the movement of the subject from the movie video signal, it is only possible to perform an inappropriate reproduction in which the image flows.

[0003] In order to obtain a clear image of a moving subject during still playback, it is necessary to shoot at a high shutter speed. However, the sense of continuity of each frame of the image is lost during movie playback, and playback is performed. The motion of the subject in the displayed image becomes very unnatural, and the two requirements are not compatible.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a still / movie video
It is intended to simultaneously satisfy the above two conflicting requirements in a camera. That is, from a video signal obtained by continuously photographing a moving subject, a still / moving reproduction that can perform clear still reproduction without a fall in motion due to the movement of the subject and movie reproduction with a natural motion with a sense of continuity. An object of the present invention is to provide a movie video camera and a method of generating a video signal thereof.

[0005] Still / movie video
The camera outputs video signals of the first field and the second field for one frame by interlaced scanning, and controls the exposure time of each field by electronic shutter timing.
The signal charge in the solid-state electronic imaging device is set such that the first exposure time of one of the field and the second field is shorter than one field period, and the other second exposure time is equal to one field period. Timing control means for generating an electronic shutter pulse for controlling the operation, an amplifying circuit capable of controlling a gain for amplifying a video signal output from the solid-state electronic imaging device, and a first and a second exposure time And gain control means for controlling the gain of the amplifying circuit for each field so that the luminance of the video signal of each field output from the amplifying circuit becomes substantially equal.

A still / movie video system according to the present invention
A video signal generation method of a camera includes a solid-state electronic imaging device capable of outputting video signals of a first field and a second field for one frame by interlaced scanning and controlling an exposure time of each field according to an electronic shutter timing. The signal charge in the solid-state electronic imaging device is used so that the exposure time of the first field is a first exposure time shorter than one field period, and the exposure time of the second field is a second exposure time equal to one field period. And the video signal output from the solid-state electronic imaging device is converted into a video signal for each field with a gain such that the luminance represented by the video signal in each field becomes substantially equal according to the first and second exposure times. It is characterized by amplification.

According to the present invention, the first exposure time is determined to be shorter than one field period so that a clear still image or print can be obtained. Thereby, a clear still image or print can be obtained from the video signal of the video camera. Since an image of a frame of one field is obtained in a field cycle, there is no possibility that a moving afterimage occurs.

[0008] Since the first exposure time and the second exposure time are different, the levels of the video signals of the two fields corresponding to these exposure times are different. Therefore, in the present invention, the gain of the amplifier circuit that amplifies the video signal output from the solid-state electronic imaging device is controlled so that the levels of the video signals in both fields are substantially equal. As a result, even when a movie image is reproduced, the luminance of the video signal in both fields is substantially equal, and the occurrence of flicker can be suppressed.

Further, the still / movie video camera according to the present invention outputs video signals of the first field and the second field for one frame by interlaced scanning, and can control the exposure time of each field by electronic shutter timing. Solid-state electronic imaging device,
The first of either one of the first field and the second field
The electronic shutter timing pulse for controlling the signal charge in the solid-state electronic image pickup device is set so that the exposure time of the solid-state electronic imaging device is shorter than the one-field period and the second exposure time is equal to the one-field period. Exposure timing control means, a gain-controllable amplifier circuit for amplifying a video signal output from the solid-state electronic imaging device,
Gain control means for controlling the gain of the amplifying circuit for each field so that the luminance represented by the video signal of each field output from the amplifying circuit becomes substantially equal according to the first and second exposure times. It is characterized by having.

Further, the operation method of the still / movie video camera according to the present invention is based on the interlace scanning.
A solid-state electronic image sensor capable of controlling the exposure time of each field according to the electronic shutter timing while outputting video signals of the first field and the second field for the frame is used. The signal charges in the solid-state electronic imaging device are controlled so that the field exposure time is shorter than one field period, and the video signal output from the solid-state electronic imaging device is converted into the first field exposure time and the second field exposure time. Amplification is performed for each field with a gain such that the luminance represented by the video signal of each field becomes substantially equal according to the exposure time of the field.

According to the present invention, both the first field exposure time and the second field exposure time are shorter than one field period.

When the exposure time of the first field is set to 1/125 seconds or 1/500 seconds, the exposure time of the second field is set to a constant time ratio (shutter Speed ratio). In this way, since images are taken at two different shutter speeds, an appropriate image corresponding to the type of subject can be obtained.

When the exposure time is set shorter than 1/125 second, a photographed image suitable for a printed image is obtained, and the exposure time of both fields may be equalized.

In the first embodiment of the gain control of the amplifier circuit, two kinds of gains having a ratio corresponding to a reciprocal of a ratio between the first exposure time and the second exposure time are set in the amplifier circuit. As described above, these gains are switched for each field.

In a second embodiment of the gain control,
The luminance signal component of the video signal output from the amplifier circuit is integrated using two integrating circuits over each of the first field period and the second field period, and two types of integrated circuits are integrated so that the integrated outputs of these integrating circuits become equal. Are set, and these gains are switched for each field.

In the second embodiment, generally, one gain will be fixed and the other gain will be controlled according to the integral output.

According to the second embodiment, the gain of the amplifier circuit is controlled in real time, and even if the luminance represented by the video signal output from the amplifier circuit fluctuates, the luminance represented by the video signal in each field is changed. Can always be kept equal.
Therefore, generation of flicker is almost completely prevented.

In the solid-state electronic image pickup device, preferably, signal charges accumulated in two vertically adjacent photoelectric conversion devices among the photoelectric conversion devices included in the solid-state electronic image pickup device are mixed, and the mixed signal charges are used. The obtained video signal is output as the video signal of the first field, and stored in two vertically adjacent photoelectric conversion elements in a combination different from the combination of the photoelectric conversion elements when the video signal of the first field is obtained. The mixed signal charges are mixed, and a video signal obtained by the mixed signal charges is output as the video signal of the second field.

By using such a solid-state electronic image pickup device, the signal charges accumulated in the photoelectric conversion elements vertically adjacent to each other are mixed, so that the vertical movement of the subject image becomes smooth. In addition, since the video signal of each field is generated by using the signal charges stored in all the photoelectric conversion elements, that is, since the pixel mixture is performed, a video signal of high luminance can be obtained.

In the above description, the first field is not limited to the even field or the odd field, and the second field is not limited to the odd field or the even field.

[0021]

FIG. 1 is a block diagram showing an electric configuration of a still / movie video camera, FIG. 2 is a schematic diagram of a CCD included in the video camera of FIG. 1, and FIG. 3 is an operation of the video camera. It is a time chart shown. Fig. 4 (A), (B)
5A and 5B are time charts showing how signal charges are transferred in a vertical transfer path, and FIGS. 5A and 5B are potential diagrams showing reading of signal charges.

A subject image is captured by an image pickup lens (not shown).
It is imaged on CD30.

As shown in FIG. 2, the CCD 30 has a number of photodiodes (photoelectric conversion elements) 31 arranged vertically and horizontally, a vertical transfer path 32 arranged vertically between the photodiodes 31, and a signal. A horizontal transfer path 33 for transferring charges in the horizontal direction is included.

In order to obtain a video signal suitable for still reproduction, one of the two fields of the video signal obtained from the CCD 30 (hereinafter referred to as A field) corresponds to a first exposure time at which a suitable still image is obtained. It is constituted by a video signal obtained by exposure with TA. The other field (this is referred to as a B field) is constituted by a video signal exposed for a time TB of one field period (1 V). The first exposure time TA is shorter than one field period (1/60 second), and is generally set to 1/125 second or less.

The control device 15 controls these two types of exposure times T
A and TB are determined. There are several modes for setting the exposure times TA and TB.

When the user of the camera sets the shutter speed (first exposure time TA) for obtaining a video signal suitable for still reproduction by manual operation, the shutter speed set by the user of the camera is equal to the first exposure time. It is adopted as one exposure time TA.

In a camera having an automatic exposure control (AE) function, an exposure amount is determined based on a photometric signal from a photometric element 17. Since it is extremely difficult to change the aperture from field to field (between field A and field B), the aperture value of the aperture will be fixed. The aperture value of the aperture will generally be set to a value suitable for the movie mode. That is, the aperture value is determined in consideration of the second exposure time TB and the amount of incident light represented by the photometric signal (shutter speed priority). On the other hand, the first exposure time TA for still reproduction may be determined in consideration of an aperture value and a photometric signal (aperture priority). In order to simplify the processing in the control device 15, the relationship between the first exposure time TA and the aperture value of the aperture may be set in advance in a table using the amount of incident light represented by the photometric signal as a parameter.

The controller 15 determines the first value determined in this way.
And a command signal indicating the second exposure times TA and TB to a synchronizing signal generating circuit (hereinafter referred to as SSG) 3. In response, the SSG 3 supplies an electronic shutter control circuit 20 with an electronic shutter pulse for controlling the exposure time of the A field and the B field. The SSG 3 generates a vertical synchronization signal VD, a horizontal synchronization signal, a field index signal FI synchronized with the vertical synchronization signal, and a CCD drive control signal. The vertical synchronizing signal VD, the horizontal synchronizing signal, and the CCD drive control signal are supplied to a CCD drive timing / pulse generation circuit 2.

CCD drive timing / pulse generation circuit 2
Generates various pulse signals for driving the CCD 30 based on these input signals. The pulse signal for driving the CCD 30 includes a field shift pulse FA for reading signal charges from a photodiode 31 for the A field to a vertical transfer path 32, which will be described later, and a vertical transfer from the photodiode 31 for the B field. Shift pulse FB for reading signal charges to the path, vertical transfer path 32
Vertical transfer pulses φV1 to φV4 for transferring the signal charges to the horizontal transfer path 33, a horizontal drive pulse for driving the horizontal transfer path 33, and the like.

The video camera also includes an electronic shutter control circuit 20, and under control of the control device 15,
An electronic shutter pulse CA for sweeping out unnecessary charges stored in D30 is output.

When obtaining an A-field video signal,
An electronic shutter pulse CA is applied to the CCD 30 to sweep out unnecessary charges (for example, to sweep out the substrate). When the first exposure time TA elapses after the electronic shutter pulse CA is given to the CCD 30, the CCD 30 is given a field shift pulse FA.

A field shift pulse F is applied to the CCD 30.
Given A, it is exposed for a first exposure time TA,
All of the signal charges stored in the photodiode 31 are transferred to the vertical transfer path 32. When a field shift pulse FA is applied to the CCD 30, as shown in FIG. 2, the vertically adjacent photodiodes 31 are used as photodiodes for the A field, and the signals stored in the vertically adjacent photodiodes 31 are used. charge at a time t ₃ when shown in FIG. 5 (a), are mixed, respectively, in the vertical transfer path 32 (pixel mixing). FIG. 4 shows the mixed signal charges.
5 (A) and FIG. 5 (A), the vertical transfer pulses φV1 to φV4 synchronized with the vertical synchronizing signal VD are applied to the vertical transfer path 32 to be transferred to the horizontal transfer path 33.

In the horizontal transfer path 33, the image data is sequentially shifted by a horizontal transfer pulse and read as an A-field video signal.

When obtaining a video signal of the B field,
When the second exposure time TB elapses after the application of the field pulse FA, the field shift pulse FB is applied. When the exposure time of the B field is shorter than one vertical scanning period, an electronic shutter pulse CB is applied to the CCD 30 to sweep out unnecessary charges. Clear pulse C
When the second exposure time TB elapses after B is given, C
The CD 30 is supplied with a field shift pulse FB.

A field shift pulse F is applied to the CCD 30.
When B is given, it is exposed for a second exposure time TB,
All of the signal charges stored in the photodiode 31 are transferred to the vertical transfer path 32. When the field shift pulse FB is applied to the CCD 30, as shown in FIG. 2, the photodiodes 31 vertically adjacent to each other in a combination different from the combination when the field shift pulse FA is applied are used for the B field. Used as a photodiode.

The upper and lower adjacent photodiodes 31
The signal charges accumulated in the are mixed, respectively, in the vertical transfer path 32 at time t ₃ in FIG. 5 (B). As shown in FIGS. 4 (B) and 5 (B), the mixed signal charges form vertical transfer pulses φV1 to φV4 synchronized with the vertical synchronizing signal VD.
Is transferred to the horizontal transfer path 33.

In the horizontal transfer path 33, the image signal is sequentially shifted by a horizontal transfer pulse and read as a B field video signal.

In this manner, the video signal of the A field exposed at the first exposure time TA (A ₀ , A ₀ ,
A ₁ , A _2, etc.) and a second exposure time TB
The video signal of the B field exposed at (B ₀ ,
B _1, B _2, etc. and it has) shown in, but will be read alternately for each 1V.

The signal charges accumulated in all the photodiodes in the A field and the B field are read out by the interlaced scanning, and the signal charges are mixed by changing the combination of the two photodiodes vertically adjacent to each other to mix the two signal charges. Have gained. Therefore, a high-luminance video signal can be obtained.

The A-field and B-field video signals read from the CCD 30 are passed through a correlated double sampling circuit (CDS) 4 to an automatic gain control circuit (AGC).
(Amplifier circuit) 5.

The gain of the AGC 5 is controlled to be switched between ndB and 0 dB for each field through a changeover switch 6 which is changed over by a field index signal FI from the SSG 3.

As described above, the video signal of the A field is generated by exposing under the exposure time TA shorter than one field period, and the video signal of the B field is generated under the exposure time TB of one field period. Since it is generated by exposure, the luminance level of the video signal in the A field and the luminance level of the video signal in the B field are different, and the luminance level of the video signal in the A field is lower.

Therefore, the gain of the AGC 5 is switched for each field so that it becomes ndB (n> 0) for the video signal of the A field and 0 dB for the video signal of the B field.

The control device 15 determines the gain ndB for the video signal of the A field based on the exposure times TA and TB. In principle, the average luminance of the video signal in the A field and the average luminance of the video signal in the B field should be substantially equal. The controller 15 sets the gain nd such that the ratio of the gain for the A field to the gain for the B field is the reciprocal of the ratio between the exposure times TA and TB.
B is determined, and a digital signal representing the gain ndB is output. This digital signal is converted into an analog voltage by the D / A converter 16 and applied to the terminal SA of the changeover switch 6. On the other hand, the terminal SB of the changeover switch 6 is grounded (voltage of 0 V). A field video signal is A
During the period of input to the GC 5, the changeover switch 6 is connected to the terminal SA, and the video signal of the B field is
During the period of input to the switch 5, the changeover switch 6 is connected to the terminal SB.

Without setting the gain of the B field to 0 dB,
It goes without saying that any other gain may be used. B
Gain for field and ratio of exposure time TA / TB
And the gain for the A field may be determined by

As described above, the difference in the level of the video signal, which is different from the exposure time for each field, is determined by the AGC.
5, the luminance represented by the output video signal of the AGC 5 is substantially the same in the A field and the B field.

The video signal output from the AGC 5 is subjected to signal processing such as color balance adjustment, gamma correction, and generation of a color difference signal in an image pickup system signal processing circuit 7 and then supplied to a recording / reproducing signal processing circuit 8. Here, recording processing such as pre-emphasis (high-frequency emphasis) and FM modulation is performed, and is recorded on a video tape 11 by a magnetic head 10 through an amplifier 9.

The recording / reproducing signal processing circuit 8 also performs a reproducing operation. In the reproduction mode, the video signal recorded on the video tape 11 is read by the magnetic head 10 and supplied to the recording / reproduction signal processing circuit 8 via the amplifier 9. This circuit 8 performs demodulation and de-emphasis processing of the read video signal.

The still / movie video camera in this embodiment outputs a still video signal representing a still image and a movie video signal representing a movie image. The output of these video signals is the image currently being shot in the shooting mode and the video and video in the playback mode.
Any of the images reproduced from the tape 11 is possible.

The video signal output circuit includes a delay circuit 12 for delaying the input video signal by one field, an adder circuit 13, and a changeover switch 14.

In the photographing mode, the image pickup system signal processing circuit 7
The video signal output from the video signal passes through the recording / reproduction signal processing circuit 8 as it is, and the video signal read from the video tape 11 in the reproduction mode is subjected to the reproduction signal processing by the recording / reproduction signal processing circuit 8 and then to the delay circuit 12, The signal is supplied to the terminal SA of the adder circuit 13 and the changeover switch 14. 1 of delay circuit 12
The video signal delayed in the field period is supplied to the terminal SB of the changeover switch 14 and the addition circuit 13. The changeover switch 14 is connected to the terminal SA in the case of the A field and to the terminal S in the case of the B field by the field index signal FI.
Switching control is performed so as to be connected to B respectively.

Therefore, the addition result of the video signal of the current field and the video signal of the previous field (for example, A ₁ + B ₀ , B ₁ + A ₁ , A ₂ + B ₁ ) is output from the adder circuit 13.
Is output.
By synthesizing the video signals of the A field and the B field, a movie video signal with extremely reduced or almost no flicker and continuous motion can be obtained.

The changeover switch 14 outputs an A-field video signal (for example, A ₁ , A ₁ , A ₂ , A _2, etc.) obtained by exposure suitable for still reproduction as a still video signal. .

The delay circuit 12 can be realized not only by an analog delay circuit but also by a field memory. In this case, the A / D converter and the D
/ A converters will be connected respectively (when the video signal is analog).

As described above, the still reproduction is performed only from the video signal of the A field photographed at the high shutter speed, so that even when a moving subject is photographed, a clear image without a fall in motion is obtained. Display or printing of an image is realized. Further, at the time of movie playback, a natural movie image with smooth motion can be obtained by a video signal including a video signal of the B field photographed at the shutter speed of the movie photographing.

FIG. 6 shows another embodiment of the gain control circuit. Hereinafter, this embodiment will be described.

This gain control circuit comprises two integrator circuits 20
A and 20B. These integration circuits 20A and 20B
Is composed of a resistor and a capacitor connected in series. Further, a luminance signal Y output from the imaging system signal processing circuit 7 is supplied to these integration circuits 20A and 20B via a changeover switch 28. Integrators 20A and 20
The integrated outputs _VA and VB of _B are supplied to the positive and negative input terminals of the differential amplifier 21, respectively. The output of the differential amplifier 21 is provided to an integrating circuit 22 including a capacitor 22a. The gain of the AGC 5 is a constant voltage E given through the changeover switch 18.
_O or output voltage of the integrating circuit 22 is controlled by E _H (the terminal voltage of the capacitor 22a). The constant voltage E _O defines the gain for the video signal of the B field, and the integration circuit 22
The output voltage E _H defines the gain for the video signal of the A field.

The changeover switches 18 and 28 are connected to the field
The index signal FI is used to switch between SA1 and SA2 during the A field and to SB1 and SB2 during the B field. As described above, the video signal of the B field has a higher luminance level than the video signal of the A field. Therefore, in a transient state, the integration circuit towards the output voltage V _B of the integrating circuit 20B
Greater than the output voltage V _A of 20A, just large output of the differential amplifier 21, the output voltage E _H is increased by being charged in the capacitor 22a of the integrating circuit 22. Along with this, the gain of the AGC 5 increases during the period of the A field, and the average level of the luminance signal of the A field output from the imaging system signal processing circuit 7 increases. Therefore, the integration output _VA of the integration circuit 20A increases, and the integration circuit 20A
The difference between B and the integrated output _VA is reduced.

The integration output _VA of the integration circuit 20A and the integration circuit 20
When the difference between _B and the integrated output VB becomes zero, the state shifts to a steady state. In this steady state, the output voltage E _H of the integration circuit 22 is higher than the constant voltage E _O , and the gain of the AGC 5 for the video signal of the A field is larger than that of the B field. Then, the average level of the luminance signal of the A field and the luminance signal of the B field output from the signal processing circuit 7 are equal. In this way, the luminance difference between the fields is eliminated, and the occurrence of flicker in the reproduced image is prevented.

In the video camera shown in FIG. 1, when the user of the camera can manually set the shutter speed (second exposure time TB) to obtain a video signal suitable for movie reproduction, the first exposure is performed. The time TA may be set to a time having a fixed ratio with the shutter speed.
For example, as the second exposure time TB, 1/125 second, 1/50
When 0 second is set, 1 is set as the first exposure time TA.
It may be set to / 500 seconds or 1/2000 seconds.

If a picture is taken at a shutter speed of 1/125 sec or more, a video signal suitable for still reproduction can be obtained. Therefore, when the second exposure time TB is set to 1/125 sec or more, the first exposure time TB is set. The time TA may be equal to the second exposure time TB.

Further, in the above embodiment, the CCD of the interline transfer system is used. However, the video camera of the present invention is not limited to the CCD of the interline transfer system, but uses the CCD of the frame interline transfer system. Is also possible.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an electric configuration of a still / movie video camera according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of a CCD.

FIG. 3 is a time chart showing an operation of the still / movie video camera shown in FIG. 1;

FIG. 4 is a time chart showing a state of signal charge transfer in a vertical transfer path.
(B) shows the case of the B field.

FIGS. 5A and 5B are potential diagrams showing reading of signal charges, in which FIG. 5A shows the case of the A field, and FIG. 5B shows the case of the B field.

FIG. 6 shows an example of a gain control circuit.

[Explanation of symbols]

 2 CCD drive timing pulse generation circuit 3 Synchronization signal generation circuit 5 Automatic gain control circuit 6 Changeover switch 12 Delay circuit 14, 18 Changeover switch 30 CCD

Claims (10)

(57) [Claims] 1. A solid-state electronic imaging device capable of outputting video signals of a first field and a second field for one frame by interlaced scanning and controlling an exposure time of each field in accordance with an electronic shutter pulse timing. The signal charge in the solid-state electronic imaging device is set such that the exposure time of the first field is a first exposure time shorter than one field period, and the exposure time of the second field is a second exposure time equal to one field period. And controlling the video signal output from the solid-state electronic imaging device with a gain such that the luminance represented by the video signal in each field is substantially equal according to the first and second exposure times.
A video signal generation method for a still / movie video camera that amplifies each field. 2. A solid-state electronic imaging device capable of outputting video signals of a first field and a second field for one frame by interlaced scanning and controlling an exposure time of each field in accordance with an electronic shutter pulse timing. Controlling the signal charges in the solid-state electronic imaging device so that the exposure time of both the first field and the second field is shorter than the one-field period; and a video signal output from the solid-state electronic imaging device. Is the first
A video signal generation method for a still / movie video camera that amplifies for each field with a gain such that the luminance represented by the video signal of each field is substantially equal according to the exposure time of the field and the exposure time of the second field . 3. Two kinds of gains having a ratio corresponding to the reciprocal of the ratio between the first exposure time and the second exposure time are set,
The gain is switched for each field.
Or the video signal generation method in the still / movie video camera described in 2. 4. A luminance signal component of the amplified video signal is integrated over each of a first field period and a second field period, and two kinds of gains are set so that these integrated values become equal. The video signal generation method for a still / movie video camera according to claim 1 or 2, wherein the gain of the video signal is switched for each field. 5. A method according to claim 1, wherein the signal charges stored in two vertically adjacent photoelectric conversion elements of the photoelectric conversion elements included in the solid-state electronic imaging element are mixed, and a video signal obtained by the mixed signal charges is converted to the first signal. The signal charges accumulated in two vertically adjacent photoelectric conversion elements in a combination different from the combination of the photoelectric conversion elements when the video signal of the first field is obtained as the video signal of the first field are mixed and mixed. 3. The video signal generation method for a still / movie video camera according to claim 1, wherein a video signal obtained by signal charge is used as the video signal of the second field. 6. A solid-state electronic imaging device capable of outputting video signals of a first field and a second field for one frame by interlaced scanning and controlling an exposure time of each field according to an electronic shutter pulse timing. The first of either one of the first and second fields
An electronic shutter pulse for controlling the signal charge in the solid-state electronic image pickup device so that the exposure time is shorter than one field period and the other second exposure time is equal to one field period. Exposure timing control means, a gain-controllable amplifier circuit for amplifying a video signal output from the solid-state electronic imaging device, and an image of each field output from the amplifier circuit according to first and second exposure times A still / movie video camera, comprising: gain control means for controlling the gain of the amplifier circuit for each field so that the luminance represented by the signal is substantially equal. 7. A solid-state electronic image pickup device capable of outputting video signals of a first field and a second field for one frame by interlaced scanning and controlling an exposure time of each field in accordance with an electronic shutter pulse timing. Exposure timing control means for generating an electronic shutter pulse for controlling signal charges in the solid-state electronic imaging device so that the exposure time of both the first field and the second field is shorter than the one-field period; A gain controllable amplifier circuit for amplifying a video signal output from the solid-state electronic image pickup device, and a luminance represented by a video signal of each field output from the amplifier circuit according to first and second exposure times. A gate for controlling the gain of the amplifying circuit for each field so as to be substantially equal. Emission control means still / movie video camera with a. 8. The gain control means according to claim 1, wherein said gain control means sets two kinds of gains having a ratio corresponding to a reciprocal of a ratio between a first exposure time and a second exposure time in said amplifier circuit. 8. The still / movie video camera according to claim 6, wherein the still / movie video camera is switched for each field. 9. The two gain control means for integrating a luminance signal component of a video signal output from the amplifying circuit over a first field period and a second field period, respectively. 8. A still / smoothing device according to claim 6, further comprising: switching means for setting two types of gains so that the integrated outputs become equal, and switching these gains for each field.
Movie video camera. 10. The solid-state electronic image pickup device according to claim 1, wherein the signal charges accumulated in two vertically adjacent photoelectric conversion elements among the photoelectric conversion elements included in the solid-state electronic image pickup element are mixed, and the mixed signal charges are used. The obtained video signal is output as the video signal of the first field, and stored in two vertically adjacent photoelectric conversion elements in a combination different from the combination of the photoelectric conversion elements when the video signal of the first field is obtained. The mixed signal charges are mixed, and a video signal obtained by the mixed signal charges is output as a video signal of the second field.
Still / movie video camera according to item 1.