JP2970472B2 - Solid-state imaging device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid-state image pickup device provided in a video camera device or the like used for surveillance or the like, and more particularly, to a CCD image pickup device (hereinafter referred to as a CCD) which can be driven at a low speed shutter. The present invention relates to a solid-state imaging device.

[0002]

2. Description of the Related Art Recently, solid-state imaging devices using CCDs have been applied to various fields, but their functions and performance are not yet satisfactory. The best way to increase the sensitivity, which is one of the performance improvement items of the solid-state imaging device, is to improve the sensitivity of the CCD element used. However, apart from the improvement of the element, it is necessary to improve the sensitivity of the camera by a circuit method. Several attempts have been made. One of them is C
There is a method to secure the CCD output level at low illuminance by low-speed shutter driving means to extend the storage time of CD, and to improve the sensitivity by interpolating the intermittent video signal generated by low-speed shutter driving using video memory. is there. Hereinafter, a conventional solid-state imaging device using this method will be described with reference to FIGS.

FIG. 2 is a block diagram showing a schematic configuration of a conventional solid-state imaging device. In the figure, well-known components that are generally required when configuring a video camera are omitted.

In FIG. 2, 101 is a lens, 102 is a prism, and 103 and 104 are CCDs. The prism 102 and C move in the traveling direction of the light beam incident on the lens 101.
CDs 103 are sequentially arranged, and a CCD 104 is arranged in the traveling direction of the light beam reflected by the prism 102.
The CCD 104 incorporates a stripe type color separation filter in which R (red) filters and B (blue) filters are alternately arranged as shown in FIG. In contrast, CC
DIO3 is not combined with a color separation filter.

The output of the CCD 103 is input to a luminance signal generation circuit 112 via a sample hold circuit 111,
The output of the CCD 104 is input to the chroma signal generation circuit 114 via the sample and hold circuit 113. The sample and hold circuits 111 and 113 convert a discrete signal of a pixel cycle into a continuous signal. Luminance signal generation circuit 1
Numeral 12 generates a luminance signal from the output of the CCD 103, and a chroma signal generation circuit 114 generates a chroma (color) signal from the output of the CCD 104. The luminance signal and the chrominance signal output from the luminance signal generation circuit 112 and the chroma signal generation circuit 114 are output from the A / D conversion circuit 115,
The data is input to the field memories 117 and 118 via.

Reference numeral 105 denotes a CCD drive timing signal generation circuit which outputs a transfer gate pulse 107 having a vertical cycle and a CCD vertical transfer pulse 106 having a horizontal cycle. Reference numeral 108 denotes a vertical driver for driving the CCD 103 and the CCD 104.
7 and the CCD vertical transfer pulse 106, which are converted into ternary pulses,
04 at the same time. The CCD drive timing signal generation circuit 105 is provided with a mode setting switch 121. By switching the mode setting switch 121, the cycle of the transfer gate pulse 107 can be changed in units of fields. Since the cycle of the transfer gate pulse 107 is equal to the accumulation time of the CCD 103 and the CCD 104, the CCD 103 and the CCD 10 are switched by switching the mode setting switch 121.
4, the exposure time can be set by the low-speed shutter drive, and the long-time exposure can be set. Note that the exposure time setting by switching the mode setting switch 121 is variable for each field.

Reference numeral 109 denotes a synchronization signal generation circuit for generating a signal synchronized with the signal generated by the CCD drive timing signal generation circuit 105. Reference numeral 110 denotes a memory control for obtaining the read / write pulses of the field memories 117 and 118 from the transfer gate pulse 107 output from the CCD drive timing signal generation circuit 105 with reference to the synchronization signal output from the synchronization signal generation circuit 109. Circuit. With this memory control circuit 110,
Control of writing and reading of signals in the field memories 117 and 118 is performed. The signals read from the field memories 117 and 118 are D
/ A conversion circuits 119 and 120.

An arithmetic circuit 125 is a D / A conversion circuit 11
9 is used as one input and the output of the D / A conversion circuit 120 is used as the other input, and these are combined to output a color difference signal. A color encoder 122 modulates the color difference signal at a color subcarrier frequency by using the color difference signal output from the arithmetic circuit 125 as one input and the color subcarrier signal from the synchronization signal generation circuit 109 as the other input. 123 is a YC mix circuit, which is a D / A conversion circuit 11
The output 9 (signal relating to a luminance signal) is used as one input, and the color difference signal modulated by the color encoder 123 is used as the other input, and these are combined to generate a composite video signal. The composite video signal output from the YC mix circuit 123 is transmitted from a terminal 124, which is an output terminal of the camera, to a video device (not shown) connected thereto.

In the above-described solid-state imaging device, A / D conversion circuits 115 and 116 and field memories 117 and 11 are provided.
8. The D / A conversion circuits 119 and 120 and the memory control circuit 110 are interpolation processing means for performing interpolation processing. Hereinafter, the interpolation processing by the interpolation processing means will be briefly described.

FIG. 4 shows that the storage time is set to one field storage and four fields.
FIG. 4 is a diagram showing CCD output values when field accumulation is performed. As shown in FIG. 4, when the accumulation time is set to one field accumulation, no signal loss period occurs in the CCD output value.
A signal loss period corresponding to three field periods occurs in the D output value. That is, the accumulation time of each of the CCDs 103 and 104 is n
When a field (n is an integer of 1 or more) is set, the signal from the photodiode of the CCD is not output during the (n-1) -th field period of the n-field period. The signal loss period occurs in the luminance signal and the chroma signal to be performed. The interpolation processing of the luminance signal and the chroma signal during the signal missing period is performed by the interpolation processing means.

Next, the operation of the above-described solid-state imaging device will be described.

First, using the mode setting switch 121, the exposure time set by the low-speed shutter drive of the CCD is set to a desired exposure time (eg, a low shutter speed exceeding one field period of the television).

The light incident on the lens 101 is
2 and separated by CCD 103 and CCD 103, respectively.
An image is formed on the imaging surface of O4. Each CCD110,104
Are output from the sample and hold circuit 111,
After being converted from a discrete signal of a pixel cycle into a continuous signal at 113, the signal is input to a luminance signal generation circuit 112 and a chroma signal generation circuit 113.

When a continuous signal is input to the luminance signal generation circuit 112 and the chroma signal generation circuit 113, a luminance signal relating to the CCD 103 is output from the luminance signal generation circuit 112 and a chroma signal relating to the CCD 104 is output from the chroma signal generation circuit 113. You.

The luminance signal and the chroma signal output from the luminance signal generation circuit 112 and the chroma signal generation circuit 113 are A / D converted by A / D conversion circuits 115 and 116, respectively.
The data is converted and input to the field memories 117 and 118. In the field memories 117 and 118, signal writing and reading are performed based on read / write pulses output from the memory control circuit 110. The signals read from the respective field memories 117 and 118 are input to D / A conversion circuits 119 and 120, respectively, and are input to the D / A converters 119 and 120, respectively.
Is converted. As described above, the luminance signal and the chroma signal are A / D-converted once, the signal is written and read out in the field memory at the timing obtained from the memory transfer gate pulse 107, and the read-out signal is again D / A-converted. By doing so, the above-described interpolation processing in the missing period is performed. The interpolated luminance signal and chroma signal are input to the arithmetic circuit 125.

When the interpolated luminance signal and chroma signal are input to the arithmetic circuit 125, the arithmetic circuit 125 combines the color difference signals therefrom and outputs the synthesized color difference signal to the color encoder 122.

When the color difference signal is output from the arithmetic circuit 125 to the color encoder 122, the color encoder 1
At 22, the color difference signal is modulated at the color subcarrier frequency, and the modulated color difference signal is output to the YC mix circuit 123.

When the modulated color difference signal from the color encoder 122 is output to the YC mix circuit 123,
In the C mix circuit 123, the modulated color difference signal and D /
The luminance signal output from the A conversion circuit 119 (CCD 10
3 is compounded to generate a composite video signal, which is transmitted via a terminal 124 to a video device (not shown) connected thereto.

[0019]

In the above-described conventional solid-state imaging device, high sensitivity at low illuminance can be achieved by long-time exposure of the CCD. However, the following problems can be cited as basic problems during long-time exposure.

As the exposure time of the CCD is increased, the sensitivity can be obtained by increasing the signal level, but the image of a moving subject is blurred, making it difficult to distinguish the subject. Regarding this image blur, in particular, as a characteristic of the human eye, for a moving subject, a luminance signal including contour and shading information of the subject during a long-time exposure is longer than a chroma signal including color information. It is susceptible to deterioration due to image blur. For this reason, when capturing an image of a moving subject, the exposure time setting for the luminance signal and the chroma signal is set so that the balance between the sensitivity and the movement of the subject is optimized in consideration of the characteristics of the human eye. Need to be done. However, since the conventional solid-state imaging device has a configuration in which the exposure time of the luminance signal and the exposure time of the chroma signal cannot be set independently, the image cannot be set so that the sensitivity and the movement of the subject are in an optimal balance. There is a problem.

An object of the present invention is to provide a solid-state imaging device capable of solving the above problems and setting an image so that the balance between sensitivity and naturalness of movement of a subject is optimized.

[0022]

According to the present invention, there is provided a solid-state imaging device comprising a first CCD imaging device and a second CCD imaging device in which a color separation filter composed of a plurality of filters having different spectral characteristics is combined. , The first and second C
CC that independently drives each CD image sensor
D driving means, a luminance signal generating means for generating a luminance signal from an output of the first CCD image pickup device, and a second CC signal.
A chroma signal generating means for generating a chroma signal from the output of the D imaging device, the chroma signal produced by the luminance signal generated by the luminance signal generating means and said chroma signal generating means, said first and second CCD image sensor
These exposures occur when the exposure time of
Interpolation processing means for performing signal interpolation processing during periods when there is no output from the first and second CCD image pickup elements, and interpolation processing means for performing the above-described interpolation processing means according to the difference in exposure time between the first and second CCD image pickup elements. Level correction means for correcting the signal level of the luminance signal subjected to interpolation processing, and a video signal for obtaining a video signal from the luminance signal corrected by the level correction means and the chroma signal interpolated by the interpolation processing means And generating means.

In this case, it is desirable that a plurality of filters constituting the color separation filter having different spectral characteristics be arranged in a mosaic or stripe shape.

Furthermore, the CCD driving means, said first
And first and second driving the second CCD image pickup device
Driver, a drive timing signal generation circuit that outputs a drive timing signal to the first and second drivers, and a drive timing output to the first driver and a drive timing output to the second driver. And first and second mode setting switches for setting the periods independently of each other . The level correction means is controlled by the first and second mode setting switches .
Based on the set cycle , the first and second CCs
Different correction gain depending on the difference in exposure time of D image sensor
A correction gain control circuit to obtain, may be composed of an amplifying circuit for amplifying the level of the interpolated luminance signal by the correction gain control circuit by the obtained correction gain described above on the basis of the interpolation means.

[0025]

As a characteristic of the human eye, for a moving subject, the luminance signal including the contour and density information of the subject is more likely to deteriorate due to image blur during long-time exposure than the chroma signal including the color information. Easy to receive. For this reason, when capturing an image of a moving subject, taking into account the characteristics of the human eye, set the exposure time for the luminance signal and the chroma signal so that the sensitivity and the movement of the subject are optimally balanced. There is a need to.

In the conventional solid-state imaging device, the exposure time for the luminance signal and the chrominance signal cannot be set independently of each other, so that the above setting could not be made. On the other hand, in the solid-state imaging device according to the present invention configured as described above, the exposure time for the luminance signal and the chroma signal can be set independently of each other. The setting can be made in consideration of the characteristics of the eyes, and the image can be set such that the sensitivity and the movement of the subject are optimally balanced. For example, the exposure time of the first CCD involved in the formation of the luminance signal is set relatively short so as not to lose the luminance information as much as possible, and the exposure time of the second CCD involved in the formation of the color signal is determined by the hue. If it is set relatively long so that it is easy to determine, the outline / shade of the moving subject is determined based on the broadband luminance signal component information with a short storage time, and the hue sufficient for the narrow band is determined with the color signal component with a long storage time. This is performed based on information, and image blurring when a moving subject is captured is improved.

When the exposure times for the luminance signal and the chroma signal are set to different values, the difference in the exposure time causes a difference between the signal level of the luminance signal and the signal level of the chroma signal. Since the signal level of the signal is corrected according to the difference in the exposure time, the difference in the signal level does not impair the image quality.

[0028]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a schematic configuration of a solid-state imaging device according to one embodiment of the present invention. In the figure, well-known components that are generally required when configuring a video camera are omitted.

In FIG. 1, 1 is a lens, 2 is a prism, and 3 and 4 are CCDs. The prism 2 and the CCD 3 are sequentially arranged in the traveling direction of the light beam incident on the lens 1,
The CCD 4 is arranged in the traveling direction of the light beam reflected by the prism 2. As shown in FIG.
As shown in the figure, a stripe type color separation filter in which R filters and B filters are alternately arranged is combined, and the CCD 3 is not combined with a color separation filter. The CCD 3 and the CCD 4 have the same number of pixels and the same structure.

The output of the CCD 3 is a sample and hold circuit 1
1 is input to the luminance signal generation circuit 12 through the CCD 4
Is input to the chroma signal generation circuit 14 via the sample hold circuit 13. The sample-and-hold circuit 11 samples and holds the output signal of the CCD 3 using a sample-and-hold pulse of a pixel cycle, and converts a discrete signal into a continuous signal. The sample and hold circuit 13
The output signal of D4 is sampled and held by two sample hold pulses having a cycle twice as long as the pixel cycle and having a phase difference of 180 degrees, and a color signal corresponding to each color (R, B) filter, that is, a continuous red signal and blue signal. Convert to a signal. The luminance signal generation circuit 12 generates a luminance signal including information on the contour and density of the subject from the output of the CCD 3, and the chroma signal generation circuit 14 generates a chroma signal including the color information of the subject from the output of the CCD 4. The luminance signal and the chroma signal output from the luminance signal generation circuit 12 and the chroma signal generation circuit 14 are input to field memories 17 and 18 via A / D conversion circuits 15 and 16, respectively.

Reference numeral 5 denotes a CCD drive timing signal generation circuit, which is a transfer gate pulse 7a, 7b having a vertical cycle.
And outputs a CCD vertical transfer pulse 6 having a horizontal period.
Reference numeral 8a denotes a vertical driver for driving the CCD 3, which includes a transfer gate pulse 7a and a CCD vertical transfer pulse 6.
, And convert these to ternary pulses to obtain a CCD 10
3 Reference numeral 8b denotes a vertical driver for driving the CCD 104.
The D vertical transfer pulse 6 is input, converted into a ternary pulse, and applied to the CCD 104.

The above-mentioned CCD drive timing signal generating circuit 5
Are provided with mode setting switches 21a and 21b. By switching the mode setting switch 21a, the cycle of the transfer gate pulse 7a can be changed in units of fields.
By switching b, the cycle of the transfer gate pulse 7b can be varied in field units. The cycle of the transfer gate pulses 7a and 7b is
Since the accumulation times of the CCDs 3 and 4 are respectively set, the exposure times of the CCDs 3 and 4 can be set independently by switching the mode setting switches 21a and 21b, and the long-time exposure can be set independently. It has become.

Reference numeral 9 denotes a synchronization signal generation circuit which generates a signal synchronized with the signal generated by the CCD drive timing signal generation circuit 5. Reference numeral 10 denotes a memory control circuit which reads the above-mentioned field memories 17 and 18 from the transfer gate pulses 7a and 7b output from the CCD drive timing signal generation circuit 5 with reference to the synchronization signal output from the synchronization signal generation circuit 9. This is to obtain a write pulse.
In the memory control circuit 110, a read / read operation on the field memory 17 is performed from the transfer gate pulse 7a.
A write pulse is obtained, a read / write pulse for the field memory 18 is obtained from the transfer gate pulse 7b, and based on these, writing and reading of signals in the field memory are controlled. The signals read from each of the field memories 17 and 18 are D
/ A conversion circuits 19 and 20.

An amplification circuit 26 corrects the signal level of the output of the D / A conversion circuit 19. This amplification circuit 2
6 has a voltage control amplifier configuration. Reference numeral 28 denotes a correction gain control circuit for setting a correction gain in the amplifier circuit 26. The correction gain control circuit 28 receives as input the setting signals output from the mode setting switches 21a and 21b, and obtains the reciprocal of the accumulation time ratio of the CCD 3 and the CCD 4 according to the mode set by the mode setting switches 21a and 21b. A control voltage value is determined so as to obtain the following gain, and this is supplied to the amplifier circuit 26. The amplification circuit 26 and the correction gain control circuit 28 are level correction means. The level correction by the level correcting means will be briefly described below.

As shown in FIG. 4, the signal level when the accumulation time is four fields is four times the signal level when the accumulation time is one field. Therefore, when the exposure time of the CCD 3 and the CCD 4 is different due to the difference of the setting of the mode setting switches 21a and 21b, the CCDs 3 and 4 are changed according to the difference of the exposure time.
Will be different from each other. In order to correct the resulting signal level difference, the level correcting means obtains a correction gain which is the reciprocal of the accumulation time ratio of the CCD 3 and the CCD 4, and outputs the correction gain from the D / A conversion circuit 19 based on the obtained correction gain. Correction of the luminance signal to be performed.

An arithmetic circuit 25 receives the output of the amplifying circuit 26 as one input and the output of the D / A conversion circuit 20 as the other input, and combines them to output a color difference signal. A color encoder 22 receives the color difference signal output from the arithmetic circuit 25 as one input and the color subcarrier signal from the synchronization signal generating circuit 9 as the other input, and modulates the color difference signal at the color subcarrier frequency. Reference numeral 23 denotes a YC mix circuit, which receives the output of the amplifying circuit 26 (a signal related to a luminance signal) as one input and the color difference signal modulated by the color encoder 123 as the other input, and combines them to generate a composite video signal. . The arithmetic circuit 25, the color encoder 22, and the YC mix circuit 23 constitute a video signal generating unit for obtaining a video signal. The composite video signal output from the YC mix circuit 23 is transmitted from a terminal 124, which is an output terminal of the camera, to a video device (not shown) connected thereto.

In the solid-state imaging device described above, A /
D conversion circuits 15 and 16, field memories 17 and 18,
D / A conversion circuits 19 and 20, and memory control circuit 10
Is for performing an interpolation process as in the conventional device.

As described above, as a characteristic of human eyes, for a moving subject, a luminance signal including contour and shading information of the subject has a longer exposure time than a chroma signal including color information. It is susceptible to deterioration due to image blur at the time.
In particular, when the accumulation time of the CCD is extended in imaging under low illuminance, this image blur becomes more remarkable. In the present embodiment, in consideration of the characteristics of the eyes, the accumulation time of the CCD 3 involved in the formation of the luminance signal is set to be relatively short so as not to lose the luminance information as much as possible.
The accumulation time of D4 is set relatively long so that it is easy to determine the hue that is sufficient in the narrow band.

Next, the operation of the solid-state imaging device will be described.

First, the mode setting switches 21a, 21b
The exposure time (accumulation time) of the CCDs 3 and 4 is longer than that of the chroma signal containing the color information, and the luminance signal including the contour and the shading information of the subject is more likely to be deteriorated by the next image blur. In consideration of the characteristics of the eyes, the values are set independently so that the sensitivity and the movement of the subject are appropriately balanced.

The light incident on the lens 1 is split by the prism 2 and is imaged on the imaging surfaces of the CCD 3 and the CCD 4, respectively. The output signal of the CCD 3 is sampled and held by a sample and hold circuit 111 using a sample and hold pulse having a pixel period, converted from a discrete signal to a continuous signal, and then input to the luminance signal generation circuit 12. CCD4
Is sampled and held by two sample-and-hold pulses having a period twice as long as the pixel period and having a phase difference of 180 degrees, and a continuous color signal (here, a red signal and a blue signal) corresponding to two color filters, respectively. The signal is input to the chroma signal generation circuit 13.

The continuous signals are output from the luminance signal generation circuit 12 respectively.
When input to the chroma signal generation circuit 13, the luminance signal generation circuit 12 outputs a luminance signal based on the output of the CCD 3, and the chroma signal generation circuit 13 outputs a chroma signal based on the output of the CCD 4.

The luminance signal and the chroma signal output from the luminance signal generation circuit 12 and the chroma signal generation circuit 13 are A / D-converted by A / D conversion circuits 15 and 16, respectively, and input to the field memories 17 and 18. . Then, in the field memories 17 and 18, signal writing and reading are performed based on read / write pulses output from the memory control circuit 10. The signals read from the field memories 17 and 18 are respectively D / A
The signals are input to the conversion circuits 19 and 20 and D / A converted. As described above, the luminance signal and the chroma signal are A / D-converted once, and the signals are written and read in the field memories at the timings obtained from the memory transfer gate pulses 7a and 7b, respectively. By performing D / A conversion, an interpolation process in a missing period is performed.

The interpolation-processed luminance signal is supplied to an amplification circuit 26.
Is input to At this time, a control voltage for obtaining a gain that is the reciprocal of the accumulation time ratio of the CCD 3 and the CCD 4 is supplied from the correction gain control circuit 28 to the amplification circuit 26, and the amplification circuit 26 outputs a luminance signal corresponding to the difference in the accumulation time. Level correction is performed.

The chroma signal subjected to the interpolating process and the luminance signal subjected to the interpolating process and the level correction are applied to an arithmetic circuit 25.
Is input to Then, the arithmetic circuit 25 synthesizes the color difference signals from these, and outputs the synthesized color difference signals to the color encoder 22. When the color difference signal is output from the arithmetic circuit 25 to the color encoder 22, the color difference signal is modulated at the color subcarrier frequency in the color encoder 22, and the modulated color difference signal is output to the YC mix circuit 23.

When the modulated color difference signal is output from the color encoder 22 to the YC mix circuit 23, the YC mix circuit 23 outputs the modulated color difference signal and the luminance signal (related to the CCD 3) output from the D / A conversion circuit 19. Signal) and a composite video signal is generated.
Is transmitted to a video device (not shown) connected thereto via the.

In the solid-state imaging device according to the present embodiment described above, the stripe filters of the primary colors R and B are used as the color filters to be combined with the CCD 4 for forming color signals. However, the present invention is not limited to this. For example, a complementary color filter or a mosaic filter may be used.

Further, instead of using the mode setting switches 21a and 21b in the present embodiment, a microcomputer or the like having a function of automatically determining the accumulation time by a predetermined algorithm corresponding to the imaged scene may be used. Similar effects can be obtained.

[0050]

Since the present invention is configured as described above, it has the following effects.

According to the first aspect, the exposure time for the luminance signal and the chroma signal can be set in consideration of the characteristics of the human eye, so that the sensitivity and the movement of the subject can be optimally balanced. An image can be set, and there is an effect that image blur is improved when a moving subject is imaged.

According to the second aspect, in addition to the above effects, an optimum color separation filter can be provided.

According to the third aspect, it is possible to realize a solid-state imaging device having the above effects.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a schematic configuration of a solid-state imaging device according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a schematic configuration of a conventional solid-state imaging device.

FIG. 3 is a diagram illustrating an example of an arrangement of filters constituting a stripe-type color separation filter.

FIG. 4 is a diagram showing CCD output values when the accumulation time is one field accumulation and four field accumulation.

[Explanation of symbols]

 Reference Signs List 1 lens 2 prism 3, 4 CCD 5 CCD drive timing generation circuit 6 vertical transfer pulse 7a, 7b transfer gate pulse 8a, 8b vertical driver 9 synchronization signal generation circuit 10 memory control circuit 11, 13 sample hold circuit 12 luminance signal generation circuit 14 Chroma signal generation circuit 15, 16 A / D conversion circuit 17, 18 Field memory 19, 20 D / A conversion circuit 21a, 21b Mode setting switch 22 Color encoder 23 YC mix circuit 24 Terminal 25 Operation circuit 26 Amplification circuit 27 Color subcarrier Signal 28 Correction gain control circuit

Claims (3)

(57) [Claims] A first CCD image pickup device, a second CCD image pickup device in which a color separation filter composed of a plurality of filters having different spectral characteristics is combined, and the first and second CCD image pickup devices. CCD driving means for independently driving the shutter, luminance signal generating means for generating a luminance signal from the output of the first CCD image sensor, and chroma signal generation for generating a chroma signal from the output of the second CCD image sensor about means and chroma signal generated by the luminance signal luminance signal generated by the generating means and the chroma signal generator
The exposure time of the first and second CCD image pickup devices
These first and second, which occur when a predetermined time is exceeded,
An interpolation processing means for performing signal interpolation processing during a period when there is no output from the CCD imaging device; and an interpolation processing means for performing interpolation processing by the interpolation processing means in accordance with a difference in exposure time between the first and second CCD imaging devices. Level correction means for correcting the signal level of the luminance signal, and a video signal generation means for obtaining a video signal from the luminance signal corrected by the level correction means and the chroma signal interpolated by the interpolation processing means, A solid-state imaging device comprising: 2. The solid-state imaging device according to claim 1, wherein the plurality of filters constituting the color separation filter having different spectral characteristics are arranged in a mosaic shape or a stripe shape. . 3. The solid-state imaging device according to claim 1, wherein said CCD driving means includes first and second drivers for driving said first and second CCD imaging devices, and said first and second drivers. a drive timing signal generating circuit driver outputs a driving timing signal, the period of the driving timing to be output to the first output to the driver driving timing and the second driver each
Is composed of a first and second mode setting switch for setting independently the level correction means, based on the set period by the first and second mode setting switch, said first and second a correction gain control circuit to obtain different correction gain according to the difference in exposure time of the second CCD image sensor, before based on the correction gain obtained by the correction gain control circuit
Serial solid-state imaging apparatus characterized by being composed of an amplifying circuit for amplifying the level of the interpolated luminance signal by interpolating processing unit.