JPS6120192B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a color solid-state image sensor using a solid-state image sensor, and in particular, it is an object to directly obtain a standard color video signal from the solid-state image sensor and to improve image quality. Various color solid-state imaging devices using semiconductor elements such as BBD and CCD as solid-state imaging bodies have been proposed. The configurations of color filters placed in front of the solid-state image sensor are similarly diverse, but among these, the so-called double green color filter filters out the green component more than the other color components out of the color components that make up the luminance signal. The resolution is improved by including the As shown in Fig. 1, this double green type color filter has a plurality of transmissive areas with one pixel as a unit area, and odd-numbered areas, and the areas corresponding to the odd-numbered horizontal scanning lines are shown in the figure. Green component G as in
For example, the transmitted light is selected to be G-R-G-B in the horizontal scanning line direction so that the red and blue components are included twice as much for each pair of R and B, and this is sequentially repeated. The resulting spectral characteristics are taken. The even number is due to signal processing as described below.
The position of the transmitted light is selected so that the green component G is in reverse phase. Therefore, when an object is imaged using such a color filter 1, the spectrum and phase relationship of each color component will be as shown in FIG. If the sampling frequency in the horizontal scanning direction is _C , and if the band of the green component G is selected to be the sampling frequency _C (approximately 4.5MHz), the sampling output related to the green signal among the outputs obtained from the solid-state image sensor is shown in Figure 2. As shown in A, in addition to the modulation component (DC component) S _DG , the sampling frequency _C
A sideband component (alternating current component) _SMG with the carrier is obtained. If the sampling frequency _C is about 4.5MHz as described above, the relationship between the signal bands will be as shown in the figure, and the sideband component _SMG will be mixed into the modulation component _SDG . Since the aliasing distortion caused by the sideband components degrades the image, vertical correlation is usually used to remove the aliasing distortion. That is, since the phases of carriers obtained from adjacent horizontal scanning lines have an inverse phase relationship as is clear from the configuration of FIG. 1, aliasing distortion can be removed by vertical correlation processing. Since the carrier of each of the red component R and the blue component B is exactly half the carrier of the green component G, the relationship between the modulation component and the sideband component of each is as shown in FIG. 2C. In this case, although R and B components are obtained from each horizontal scanning line, the carrier phases are not in an antiphase relationship, so the green component G
In the same way as above, vertical correlation processing is applied to obtain the sideband component S.
It is not possible to remove _MR (S _MB ). Note that if the level of the modulation component mixed in this sideband component, especially in the low frequency side, is sufficiently small compared to the level of the modulation component, there will not be much of a problem, but as in this example, R and When the carrier at B is as low as 1/2 _C , the level of the sideband component mixed into the low frequency component is large, and therefore the influence of this sideband component on the reproduced image cannot be ignored. . In order to eliminate this kind of influence on reproduced images (image quality deterioration), if the band of the color components related to R and B is reduced to 1/4 _C or less by optical means, the modulation components and sidebands at this time can be reduced. The relationship between the components is as shown in FIG. 2D, and no sideband components are mixed into the modulation components. However, it is generally not easy to limit the passband to only optically desired wavelengths, that is, to form a wavelength-dependent optical low-pass filter. In order to eliminate the above-described drawback of aliasing distortion without using a wavelength-dependent optical low-pass filter, the spectral characteristics of the color filter 1 may be selected as shown in FIG. 3, for example. In this example, the color filter is selected to have spectral characteristics such that the component Y, which is the luminance signal in the standard method, is obtained from the desired transmission region, and the color difference outputs of R-Y and B-Y are obtained line-sequentially as a whole. In other words, odd lines are selected as Y-R-Y-R..., even lines are selected as B-Y-B-Y..., and Y-R-Y-R... is used.
If the transmission area is selected so that the luminance component Y has an opposite phase for each line, the luminance component Y will have an opposite phase for each line, so the aliasing distortion regarding the luminance component Y can be removed by vertical correlation processing. Also, the carriers of the R and B components have the same frequency as the carrier in Y, and the passband is not restricted at all, so the relationship between the modulation components and sideband components in R and B is exactly as shown in Figure 2A. It becomes the same as the relationship. As in the case of Fig. 1, sideband components regarding R and B cannot utilize vertical correlation, so sideband components will remain in each modulation component, but as shown in Fig. 2A. In the residual situation, the level (residual level) of the sideband component that exists in the lower frequency side of the modulation component is much lower than the residual level in the case of Fig. 2 C shown in the conventional example, and the sideband component The influence of the residual on the reproduced image is not a problem in practice. Although FIG. 4 shows a circuit system when the color filter 1 shown in FIG. 3 is used, a frame transfer system using a CCD as shown in FIG. 5, for example, can be used as the solid-state image sensor. As is well known, this solid-state image sensor 10 includes a plurality of light receiving sections 2 that serve as picture elements arranged vertically and horizontally onto which a subject is projected.
an image pickup section 10A having a camera, and an accumulation section 10B for accumulating carriers induced according to a subject image.
and further horizontal shift register 1 for carrier readout.
It consists of 0C. 3 is an output terminal. The solid-state image sensor 10 receives a drive signal obtained from the synchronous board 11.
Although the driving signal Pa is supplied, the drive signal Pa includes a plurality of pulses each necessary for inducing a carrier according to the object image, transmitting it, and reading it. Among the imaging outputs obtained at the terminal 3, the luminance signal Y is subjected to vertical correlation processing.
Therefore, the luminance signal Yi read out by the sampling and holding circuit 12 is transmitted to the vertical correlation processing circuit 20.
is supplied to In this example, in order to prevent deterioration of resolution in the vertical direction, vertical correlation processing is not performed on low frequency components, and only high frequency components are processed. Therefore, the luminance signal Yi is once supplied to the low-pass filter 13, and the low-frequency component Y _L (500 to 1000K
Hz) is extracted. Low frequency component Y _L is the original luminance signal
Since it is supplied to the subtracter 14 along with Yi, only the high frequency component Y _H is obtained as an output, but this high frequency component Y _H is passed through the delay circuit 15 of 1H (H is the horizontal scanning period) to the adder. 16 with a non-delayed output. Since the phase relationship of the carriers is opposite in adjacent horizontal scanning sections, sideband components are canceled by performing the above-mentioned signal processing, and as a result, this addition output is sent to the adder 17 in the next stage. Low frequency component Y _L
If both are supplied, a luminance signal Y _O from which sideband components have been removed can be obtained. Note that the delay circuit 18 provided before the subtracter 14 is a low-pass filter 1.
This is to correct the mismatch in transmission time due to the time delay that occurs in step 3. On the other hand, since the red component R and the blue component B are obtained every 1H, in order to obtain the desired color video signal So, these components R and B must be simultaneously obtained and continuously processed like the luminance signal Y. It is necessary to devise ways to obtain it. Next, a circuit system for synchronization will be explained. The red signal R (or blue signal B) extracted by the sampling and hold circuit 21 is supplied to the synchronization circuit 23 via the low-pass filter 22. The synchronization circuit 23 is composed of a 1H delay circuit 24 and a switching circuit 25.
For example, if shown in a mechanical switch relationship such that a red signal R is always obtained from one terminal and a blue signal B is obtained from the other terminal, then 2 is shown in the figure.
The circuit is configured as a two-contact type, and a delayed output and a non-delayed output are supplied to desired terminals. A pair of switches SWa and SWb are switched every 1H by the control signal Pb obtained from the synchronization board 11.
The R and B primary color signals (sampling output) obtained alternately every 1H are synchronized, so that the R and B primary color signals can be obtained simultaneously on the output side. The synchronized primary color signals R and B are the luminance signal Y _O
Therefore, from the terminal 27, a color video signal So in a standard format, for example, the NTSC format, is obtained. In addition, starting with this encoder 26, the above-mentioned sampling and holding circuits 12 and 21 receive desired drive pulses Pd and Pe, respectively, from the synchronization board 11.
Supplied by By the way, when the primary color signals R and B are synchronized to form the target color video signal So in this way, although the above-mentioned drawbacks can be eliminated, new problems described below arise. In other words, to synchronize the primary color signals means to simultaneously use the sampling outputs of adjacent horizontal lines, so if we consider the outputs of N lines (for example, odd lines) and N+1 lines, the output of each line is The color difference outputs E _CR(N) and E _CR(N+1) are respectively expressed by the following equations. E _CR(N) = a(R _(N) −Y _O(N) ) +b(B _(N-1) −Y _O(N) ) ...(1) E _CR(N+1) = a(R _(N) −Y _O(N+1) ) +b(B _(N+1) −Y _O(N+1) ) ...(2) (a and b are constants) Therefore, the color difference of each line is being output will always include the primary color signal from 1H before, so when an object with no correlation in the vertical direction is imaged, especially when a monochrome image is imaged, the color difference outputs of 1 and 2 will not become zero, It has the disadvantage that coloration occurs and the reproduced image deteriorates. Taking these points into consideration, the present invention removes image deterioration due to residual sideband components without using wavelength-dependent optical low-pass filters, etc., and uses a color filter 1 shown in FIG. The circuit, especially the color encoder 26, skillfully utilizes the special characteristics of
The purpose is to simplify the circuit configuration by making it possible to omit the circuit. Regarding omitting the color encoder,
To briefly explain the background, in the conventional example shown in FIG. 4, if we pay attention to the imaging output obtained at the output terminal 3, the luminance signal Yi in this imaging output is NTSC, as is clear from the explanation of FIG. 3. Considering that the luminance signal is a luminance signal that satisfies the standard, and that R-Y and B-Y color difference signals should be obtained from the configuration of the color filter 1, the color encoder 26 is processed by special signal processing. Even if it is not used, it can be configured so that a color video signal that satisfies the target NTSC format can be obtained directly from the terminal 3.
This type of signal processing method is called the direct NTSC method. Here, in order for the imaging output itself to be output as an NTSC color video signal S _NTSC , at least the following conditions must be satisfied. () S _NTSC = S _Y + S _C ......(3) S _Y =0.30E _R +0.59E _G +0.11E _B ......(4) S _C =R-Y/1.14cos2π _S t+B-Y/2. 0
3sin2π _S t… (5) () _S = 455/2 _H …(6) _H = 525/2 _V …(7) However, S _Y : Luminance signal Y _O (≒Yi) S _C : Carrier color Signal E _R ~ E _B : Each signal from R to B _S : Color subcarrier frequency _H : Horizontal scanning frequency _V : Vertical scanning frequency In the conditional expressions () and (), the condition of equation (3) is based on the color filter. Immediate satisfaction from configuration 1. Then, the horizontal shift register 10 of the solid-state image sensor 10
If the frequency _C of the readout clock pulse supplied to C, that is, the sampling pulse, is, for example, the color subcarrier frequency _S (=3.579545MHz), then (5)
It is also possible to satisfy the conditions of Eq. That is, in the case of the solid-state image sensor 10, the input information corresponding to the subject image is obtained in a state where it is sampled for each pixel, so the color components in the image pickup output are obtained as carrier color signals, and moreover, the sampling frequency _C If the color subcarrier frequency _S is selected as described above, the carrier frequency of the carrier color signal S _C becomes the color subcarrier frequency and satisfies equation (5). In this way, if formulas () and () are satisfied, NTSC can be used without using the color encoder 26.
However, if the sampling frequency _{C is} selected as the color subcarrier frequency _S itself, the spatial pixel arrangement of the solid-state image sensor 10 and the picture when reproduced are obtained. The elementary arrays will be different. That is, the carrier frequency is the color subcarrier frequency _S
In the case of , as is well known, the phase of the carrier color signal is completed in two frames, so the first frame (odd number) and the second frame (even number) are of course opposite in phase, and each frame has a different phase. Even if the first horizontal line and the second horizontal line of the first field are in opposite phases, the second field has an opposite phase relationship with respect to the first field. If these relationships are shown in terms of the arrangement of the picture elements 2, it will be as shown in FIG. This figure is a conceptual diagram of picture elements 2 drawn focusing on the center of the aperture in the imaging section 10A, and in the configuration diagram of FIG. 5, the picture elements 2 are arranged in parallel as shown. τ _H is picture element 2 in the horizontal direction
This is the array pitch of . Note that since this example shows the case of interlacing, only picture elements indicated by dotted lines are used in even fields. The reproduced picture element arrangement in which the picture elements are arranged in parallel in this way is as shown in B and C in the figure. First, in the first frame, when the first field
In the second field, picture element 2 on the horizontal line is shifted by 1/2τ _H from the spatial arrangement position, and conversely, picture element 2 on the first horizontal line is shifted by 1/2τ _H in the second field, as shown in Figure B. This becomes an arrangement pattern of picture elements. In the second frame, the picture element movement is completely opposite to that of the first frame,
Therefore, if a subject image is captured with this pixel movement, the reproduced image will be affected, such as flickering and becoming difficult to see. To remove this effect on the reproduced image,
The frequency _C of the sampling pulse (clock pulse) supplied to the horizontal shift register 10C may be selected as follows: _C = 2 _S (8). In other words, if the sampling frequency _C is selected as shown in equation (8), the phase of the color subcarrier signal will be line-complete and will always be in phase, so the reproduced pixel arrangement pattern can be transformed into a spatial pixel arrangement pattern. can be matched to
It can eliminate the flickering phenomenon. In this case, the carrier color signal S _C is 1/2
Of course, if the sideband components of _C are used, equation (5) is satisfied. Further, the color subcarrier frequency _S that determines the sampling frequency _C is not only the regular color subcarrier frequency (=3.579545MHz) shown in equation (6), but also a slightly shifted value (changed frequency) can of course be used. In that case, the changing frequency is chosen to be within the synchronization pull-in range of the APC circuit on the receiver side, preferably within the broadcast standard. Normally, synchronization will not be disrupted even if the frequency differs from the standard value by about 10Hz to 200Hz. To obtain the changed frequency, the horizontal frequency _H itself may be slightly changed (for that purpose, the vertical scanning frequency must be changed), or
The coefficient of _H may be changed. The present invention is applied to a solid-state imaging device employing the direct NTSC method as described above, and is configured to eliminate the drawbacks of the double green method described above. The apparatus of the present invention will be explained in detail with reference to FIG. 7 and subsequent figures. Parts corresponding to those in the previous figure will be described with the same reference numerals.First, in order to eliminate the coloration during monochrome imaging described above, in the present invention, the modulated signals of the primary color signals are synchronized and signal processed. Instead, signal processing is performed by synchronizing the carrier color signal itself, which is made up of color difference signals, and each of the R-Y and B-Y color difference signals may be extracted rather than the sideband components. It may also be formed from modulation components. The embodiment shown in FIG. 7 is the former case, and the relationship between the modulation component and the sideband component is as shown in FIG. 8, and since the color filter 1 shown in FIG. 3 is used, the R- The Y and BY color difference signals are obtained line-sequentially. That is, on the odd-numbered lines, the luminance signal Yi and the R primary color signal are obtained with an antiphase relationship, and similarly, on the even-numbered lines, the B primary color signal and the luminance signal Yi are obtained with an antiphase relationship. Therefore, as shown in FIG.
is supplied to 1/2 the sampling frequency, i.e.
A carrier color signal component (shown by a broken line in FIG. 8) having a desired bandwidth (500 kHz to 1 MHz) centered on 1/2 carrier frequency 1/2 _C (= _S ) is extracted. Therefore, by supplying this carrier color signal component to the synchronization circuit 23 and synchronizing it, color difference signals of B-Y as well as R-Y can be obtained simultaneously. Note that the carrier color signal component extracted by the bandpass filter 30 includes the eighth
As shown in the figure, the high frequency component of the modulation component is included, but the level of this high frequency component is very small, so
The presence of high frequency components can be ignored. Here, similarly to equations (1) and (2), if the color difference outputs E _{CR (N)} and E _{CR (N+1)} of the present invention are calculated, the following equations are obtained. E _CR(N) = a(R _(N) −Y _O(N) ) +b(B _(N-1) −Y _O(N-1) ) …(9) E _CR(N+1) = a (R _(N) −Y _O(N) ) +b(B _(N+1) −Y _O(N+1) ) ...(10) Also during color difference output in equations (9) and (10), 1H before However, since this primary color signal from 1H before also includes the luminance signal from 1H before, even when there is no vertical correlation, especially when capturing a black and white image, , a term, and b term each become zero, so that black and white images will not be colored as in the conventional device. In the present invention, in addition to such a configuration, a phase correction circuit 40 is provided before the switching circuit 25 constituting the synchronization circuit 23 in order to satisfy the phase relationship of the color difference signals in the direct NTSC system. The arrangement of the phase correction circuit 40 is as described below. In other words, if the sampling frequency _C is set to 2 _S , there will be no movement of the reproduced picture elements, but the carrier color signal S _C in the NTSC system
As shown in FIG. 9, if we choose the phase of the burst signal on the vertical axis, the phase relationship of the color difference signals R-Y and B-Y constituting the carrier color signal is as shown in the first horizontal line (N When the line) is shown in A in the same figure, the second horizontal line (N+1 line) has an opposite phase as shown in B in the same figure. On the other hand, when _C = 2 _S , the phase relationship of the carrier color signal S _C completely matches the spatial phase relationship, so the phase of the color difference signal on the N line is as shown in Figure 10A. Then, the phase relationships of the other lines are as shown in B and C in the figure. Therefore,
Even if the color difference signals are synchronized by the 1H delay circuit 24, the relationship shown in FIG. 9 is not satisfied. Therefore, first considering the odd number (first) field, we can calculate R-Y obtained at the Nth line by 1H.
It is further delayed by a time corresponding to 3/4π (3/4 _S μsec) (FIG. 11A). Similarly, if the phase of the BY output of the N+1 line is inverted (delay time is 1/2 _S μsec, figure B) and the outputs of these lines are combined, the phase relationship shown in figure 9A is obtained. In order to obtain the relationship shown in Figure 9B from the N+1 and N+2 lines, first, the R-Y output must be phase-shifted by 90° (1/4 _S μsec delay time, C in the same figure), and then delayed by 1H. It is sufficient to combine the BY output (D in the same figure). For even fields, the phase relationship is inverse to the above (see FIG. 12). In order to achieve such phase correction, the phase correction circuit 40 includes three delay circuits 4 each having a different delay time.
1A to 41C and two changeover switches SWc, SWd
The delay time is as shown in the figure. Switches SWc and SWd are switched and controlled for each 1H and 1F (field), respectively. Switching control signal Pf is synchronous board 1
1. If the above-mentioned phase correction circuit 40 is provided in the synchronization circuit 23, the switching circuit 25 outputs phase-corrected R-Y and B-Y color feed signals S _{C (RY
)} , S _{C (BY)} are obtained, and these are supplied to the level adjustment circuits 43A and 43B, respectively, and after their respective coefficients are determined as in equation (5), they are converted to the luminance signal S _Y (=Y _O ) is supplied to the adder 44.
The synthesized output is further supplied to a subsequent synchronization signal synthesis circuit 45, where, as is well known, the synchronization board 11
In addition to the blanking pulse (BLK) obtained in the above, synchronization signals (VD, HD) and burst signals (BURST) are added to form the well-known color video signal _SNTSC . It goes without saying that the phase of the burst signal is selected as shown in FIG. 46 is a phase adjustment circuit for this purpose. Note that it is of course possible to select the phase of the burst signal in a well-known manner, but in this case, the phase of the burst signal
0 becomes a little more complicated. According to the configuration of the present invention described above, it is possible to configure a direct NTSC type color solid-state imaging device extremely easily, and in particular, the color encoder can be omitted.
It is possible to simplify the circuit configuration, completely eliminate coloring during monochrome imaging, and improve image quality. Next, another embodiment of the device of the present invention will be described. In the embodiment shown in FIG. 7, a color filter 1 with spectral characteristics as shown in FIG. 3 is used in order to remove sideband components mixed in the luminance signal S _Y using vertical correlation. The image quality can also be improved by configuring the sideband components to be canceled out during monochrome imaging, regardless of the vertical correlation processing. In this case, a color filter 1 having spectral characteristics as shown in FIG. 13 may be used. FIG. 14 shows an example of a circuit processing system using this color filter 1. In this example, the high-frequency component of the luminance signal is not the luminance signal shown in FIG. 15A, but a composite imaging output of the luminance signal and the R or B primary color signal. In this way, the reason why the composite imaging output is used as a high-frequency component is that the phase of the carrier of the sideband component included in the composite imaging output is in an inverted phase relationship between the luminance signal and the primary color signal. This is because the sideband components are to be removed by utilizing this difference in carrier phase. Further, since the luminance signal obtained from the solid-state image sensor 10 is the luminance signal itself in the NTSC system due to the spectral characteristics of the color filter 1, the low-frequency component of this luminance signal itself is used as the low-frequency component. Therefore, the luminance signal obtained at the terminal 3 is supplied to the low-pass filter 52 to filter the desired band (500
Low frequency component S _DYL (15th
Figure B) is used as is as a low-frequency component of the luminance signal Y _O. The high-frequency components constituting the luminance signal Y _O are obtained in the following manner from the viewpoint of canceling sideband components. That is, the other sampling and holding circuit 21 provided on the output terminal 3 side is driven by the sampling signal Pd ₂ supplied for each picture element, and as a result, as shown in FIG. 15C and D, in addition to the luminance signal, , a composite imaging output containing the primary color signal R or B is obtained. This composite image output is produced by a low-pass filter 53A selected to have the same filter characteristics as the above-mentioned low-pass filter 52 and a subtracter 53.
Therefore, the high-frequency component S _DY +S _DR (or S _DB ) of the imaging output is supplied to the filter circuit 53 consisting of B.
(Fig. 15E) is output. In this example, this high frequency component is used for the luminance signal. Note that 54 is a delay circuit. The high-frequency component thus obtained is supplied to the adder 55 together with the low-frequency component described above and is combined, but the luminance signal that is the composite output includes the high-frequency component shown in FIG. 15E on the high-frequency side. carrier frequency 1/2 as shown
Since sideband components higher than _C are also included, the combined output is supplied to a low-pass filter 56 with a cutoff frequency of about 4.5 MHz. Therefore, in the end, as shown in FIG. 15F, a luminance signal Y _O composed of the imaging output on the high frequency side is obtained. 57 is a delay circuit provided in consideration of the transmission time of the color signal system. By the way, the spectral characteristics of the color filter 1 are selected so that when a monochrome image is captured, the outputs obtained from each unit area of the color filter 51 are all equal, that is, Y=R=B. In this case, since the luminance signal and each primary color signal have an inverse phase relationship as shown in FIG. Sideband components (S _MR - S _MY ) and (S _MB - S
_MY ) will be canceled out. Therefore, it is possible to obtain a luminance signal Y _O from which sideband components have been removed. In addition, sideband components included in the low frequency side (B in the same figure)
remains even after the above signal processing, but since the level (residual level) of the residual sideband component relative to the low frequency component is extremely small, there is no effect. In the case of a color image, sideband components will remain in the luminance signal regardless of the presence or absence of vertical correlation, but in this case, as mentioned above, the influence on the image is small, and moreover, the sideband components of R and B remain. Of the primary color signals, the components included in the high frequency range of 4.0 MHz are either zero or very small, so the image quality does not deteriorate. The processing system for the carrier color signal is the same as the embodiment shown in FIG. 7, so its explanation will be omitted. However, the color filter 1 used in this example processes the color difference obtained from each horizontal line as shown in FIG. Since all the signals are in phase, the result is as shown in FIG. Therefore, in this case, it is necessary to perform phase correction as shown in FIGS. 17 and 18. I will omit that explanation. FIG. 19 shows still another example of the color filter. In this example, unlike the previous cases, the pixel arrangement of the solid-state image sensor 10 is not parallel as shown in _FIG . The object is a solid-state image sensor 10 arranged in a checkered pattern, and the spectral pattern is the same as the pixel arrangement pattern. The spectral characteristics are similar to those shown in FIG. Sideband component removal does not utilize vertical correlation. Therefore, a signal processing method as shown in FIG. 14 is used. The sampling pulse supplied to the horizontal shift register 10C has a special spatial pixel arrangement even if _C = 2 _S , so in order to match the reproduced pixel arrangement pattern spatially, the phase must be inverted for each line. sample pulses are used. The phase relationship of the color difference signals obtained from each line is as shown in FIG. Phase correction can be achieved. For example, as shown in FIG. 21, the phase correction circuit 40 can be constructed by simply providing two delay circuits 41D and 41E whose delay times are both 1/2 _S. By the way, all the examples mentioned so far
This is a case in which each of equations (6) and (7) is satisfied, but the present invention is not limited to these examples. In other words, as mentioned above, if the color subcarrier frequency _S is slightly changed from the standard value (3579545MHz), it will not make any difference considering the synchronization pull-in characteristics of the receiver, so for example,

[Table] 〓 …………(11)
525

Claims (1)

[Claims] 1. On the solid-state image sensor and every other horizontal line, there is a unit area where red light is transmitted and the readout signal becomes a red signal, and a unit area where all the light is transmitted and the readout signal is the luminance signal in the standard method. are arranged alternately, and the remaining horizontal lines include a unit area where blue light is transmitted and the readout signal becomes the blue signal, and a unit area where all the light is transmitted and the readout signal becomes the luminance signal in the standard method. and a drive circuit for driving the solid-state image pickup body with a clock signal having a frequency approximately twice the color subcarrier frequency of the standard method, a first sampling and hold circuit that samples a portion of the signal obtained from the color filter that corresponds to the unit area from which the luminance signal of the color filter is obtained; and a luminance signal generator that generates a luminance signal from the output of the first sampling and hold circuit. a second sampling and holding circuit that samples a portion of the signal obtained from the solid-state image pickup device that corresponds to all the unit areas of the color filter; line-sequentially from the output of the second sampling and holding circuit; A carrier color signal generation circuit that obtains a carrier color signal modulated by the red difference signal and blue difference signal components, a phase correction circuit that corrects the phase of the output signal of the generation circuit, and a phase correction circuit that simultaneously outputs the output of the phase correction circuit. and an adder that adds the output of the synchronization circuit and the output of the luminance signal generation circuit, and a standard composite color video signal is obtained at the output of the adder. Color solid-state imaging device.