JP3344202B2 - Image signal processing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image signal processing apparatus, and more particularly to a high definition image signal such as a high vision system using a solid-state image pickup device for a standard television system image signal such as an NTSC system or a PAL system. The present invention relates to an image signal processing device for obtaining

[0002]

2. Description of the Related Art As an imaging device for obtaining a high-definition Hi-Vision image signal with higher definition than a standard television image signal such as NTSC system or PAL system, a dedicated imaging device is
The signal processing speed is required to be high, the power consumption is high, and the peripheral devices used are required to have a high degree of accuracy, and are extremely expensive. For this reason, the present applicant has previously proposed an image pickup apparatus and an image signal processing apparatus for obtaining a high-vision image signal using a solid-state image pickup device for a standard television image signal (for example, Japanese Patent Application No. 5-152850). , Japanese Patent Application 6
No. 257583).

The imaging apparatus and the image signal processing apparatus proposed by the present applicant have a color separation optical system as shown in FIG. 24, and are arranged in a solid-state imaging device as shown in FIG. Has a configuration as shown in FIG. 26,
It has a signal processing circuit as shown in FIG.

As shown in FIG. 24, the color separation optical system of this image pickup apparatus uses a B prism 10 for extracting a blue (B) light component from incident light, and a light transmitted from the B prism 10 through a dichroic film 10a. An R prism 12 for extracting a red (R) light component, and a G prism 14 for extracting a green (G) light component from light transmitted through the R prism 12.
A half mirror 16 provided on the G prism 14,
The blue solid-state image sensor 19B, into which blue light reflected and extracted from the B prism 10 at the dichroic film 10a and the incident surface of the B prism 10, respectively, is incident through the B trimming filter 13, and the dichroic films 12a and R of the R prism 12 A red solid-state imaging device 19R into which red light reflected and extracted by the incident surface of the prism 12 is incident through the R trimming filter 15;
G trimming filter 1 reflected by half mirror 16
And a second solid-state image sensor for green light 19G2, to which green light transmitted through the half mirror 16 and the G trimming filter 18 is incident, respectively. Have been.

The solid-state imaging devices 19B, 19R, 19G1 and 19G2 are each constituted by a charge-coupled device (CCD), and have an aspect ratio of 16:
For example, each pixel is composed of 804 × 516 pixels included in the area of the PAL-type image sensor corresponding to 9 pixels.

Further, solid-state image pickup devices 19G1 and 19G for G
9G2, as shown in FIG. 25, is arranged shifted by one pixel pitch in the vertical direction. In the figure, a signal of a pixel on a horizontal line indicated by a solid line is read in an odd field, and a signal of a pixel on a horizontal line indicated by a dotted line is read in an even field. However, in this case, only the resolution equivalent to the pixels of 19G1 and 19G2 can be obtained. Therefore, in order to improve the resolution, the solid-state imaging devices 19B and 19R for B and R are replaced with the solid-state imaging devices 19G1 and 19G2 for G. In this case, the pixels are shifted by 1/2 pixel pitch in the vertical direction to obtain signals as shown in FIG.

FIG. 1 shows solid-state imaging devices 19B, 19R, and 19.
G1 and 19G2 show the signals of the respective pixels on the screen, where the circles indicate the signals of the pixels read from the solid-state imaging device 19G1, and the squares indicate the solid-state imaging device 19G.
2, and the triangular marks are the signals of the pixels read from the solid-state imaging devices 19B and 19R, respectively, and overlap at the same position. In addition, white marks indicate signals in odd fields, and black marks indicate signals in even fields. Numerals are scanning line numbers viewed as a high-definition image, and scanning line numbers “41” to “558” are odd-numbered fields of the high-definition image, and the scanning line number “60”.
3 ”to“ 1120 ”are even fields of the high definition image.

[0008] Each solid-state image sensor 19G1, 19G2, 19
B, the reading process of the imaging signal from 19R is shown in FIG.
This is performed by the signal processing circuit shown. That is,
Output from image elements 19G1, 19G2, 19B and 19R
The captured image signal is digitized by an A / D converter (not shown).
Signal G1 (g1), G2 (g2), B (b) and R
(R), and converted into the field memory 21,
22 and frame using frame combining circuits 23 and 24
Synthesis, vertical high-pass filters 25, 26 and adders 27-2
9, 31, 33, delay circuit 30, multiplier 32, etc.
High frequency additional signal G1^*, G2^* Is performed.

The input digital signals (pixel data) G1, G2, B and R written in uppercase letters are odd fields, and the input digital signals (pixel data) written in lowercase letters.
g1, g2, b and r are signals of even fields (the same applies hereinafter).

Vertical high-pass filters 25 and 26 and adder 2
7 and 28 generate the vertical high frequency signals VH1 and VH2 by performing the operations represented by the equations (1) and (2) based on the signals B and b and the signals R and r. Note that in the equations (1) and (2), m horizontal pixels and n vertical lines are used.

[0011]

(Equation 1)The vertical high frequency signal VH1 extracted from the adder 28
Is a delay signal delayed by one sampling period to the delay circuit 30.
Signal and an adder 31 to add the signal, and a multiplier 32 to multiply the signal by 1/2.
After that, the signal G1 or g1 is input to the adder 33 and
The high-frequency additional signal G1 represented by the following equation^* And
You.

G1^* m, n = G1m, n + {(VH1m, n + VH1m + 1, n) / 2} (3) Also, the vertical high frequency signal extracted from the adder 27
VH2 is input to the adder 29, and is added to the signal G2 or g2.
The addition represented by the equation is performed, and the high-frequency additional signal G2^*Tosa
It is.

G2 ^* m, n = G2m, n + VH2m, n (4) The high-frequency additional signals G1 ^* and G2 ^* and the solid-state imaging device output signals G1 (g1) and G2 (g2) are switched by the changeover switch 3.
4 and 35, the signals are alternately selected for each field and output as green signals G3 and G4 together with the digitally converted signals of the output signals of the solid-state imaging devices 19B and 19R. These output signals are converted into Hi-Vision signals using a line memory, a matrix circuit, or the like.

As described above, according to the imaging apparatus and the image signal processing apparatus proposed by the present applicant, two solid-state imaging elements for G shifted by one pixel pitch in the vertical direction are prepared, and The B and R solid-state imaging devices are arranged vertically shifted by 1/2 pixel pitch, and the vertical high-frequency component of the G image is extracted from the output imaging signals of these B and R solid-state imaging devices. A high-resolution image signal for high vision is obtained in addition to the imaging signal.

[0015]

However, in the imaging apparatus and the image signal processing apparatus proposed by the present applicant,
Since the solid-state image sensor used is not for a high-vision image signal but has a structure similar to or similar to a standard television image signal, it is cheaper than a solid-state image sensor dedicated to a high-vision image signal. Since a total of four sheets are required, one for blue (B) light and one for red (R) light, and two for green (G) light, there is a problem that the configuration is also expensive.

Also, as shown in FIG.
In the signal processing device, the high-frequency additional signal G2^* Generate
The adder 29 includes a 10-bit vertical high frequency signal VH2.
And the 10-bit solid-state image sensor output signal G2 (g2)
And the high-frequency additional signal G1^*Adder that produces
33 is a 10-bit vertical high frequency signal VH1 and 10
Bit output signal G1 (g1) of the solid-state imaging device
The configuration of the adders 29 and 33 is slightly duplicated.
There is a problem that it is rough.

In the image signal processing apparatus proposed by the applicant of the present invention, the vertical high-pass filters 25 and 26 convert frame synthesized signals generated by using the field memories 21 and 22 and the frame synthesizing circuits 23 and 24. Since the vertical high-frequency component is obtained, there is no problem in the case of a still image or a moving image with a small amount of motion.However, in the case of a moving image with a large amount of motion, the image information greatly differs between fields. May not be possible. That is, there is a possibility that a correct vertical high frequency component may not be obtained in the moving area, and if such a vertical high frequency component is added to the signals G1 (g1), G2 (g2), etc., interference or deterioration of image quality is caused.

The present invention has been made in view of the above points, and is capable of outputting a high-quality, high-definition image signal with an inexpensive configuration.
It is an object of the present invention to provide an image signal processing device that can be obtained .

Another object of the present invention is to provide an image signal processing apparatus capable of outputting a high-quality high-definition image signal without deterioration in image quality even for a moving image .

[0020]

In order to achieve the former object, an image signal processing apparatus according to the present invention is configured to convert incident light into first light consisting of blue light and red light and green light. The second consisting of light
A color separation optical system for color separation into light of the same type, and a first solid-state imaging device having a resolution of a standard television system for both blue light and red light in which the first light is incident and outputs imaging signals of blue light and red light. An element and a green light which is arranged such that the second light is incident thereon to output an image signal of green light and the pixel position thereof is vertically displaced relative to the pixel position of the first solid-state image sensor. An image pickup signal output from an image pickup apparatus comprising a second solid-state image pickup device for light and having a resolution of a standard television system.
An image signal processing device that performs signal processing on signals
Of the current field output from the first solid-state imaging device .
An imaging signal and a signal obtained by delaying this imaging signal by one field
Synthesizing the frame signal and outputting the synthesized signal as a frame synthesized signal, extracting means for extracting a vertical high frequency signal from the frame synthesized signal output from the first synthesizing means, and a second solid-state imaging device. A second synthesizing unit for synthesizing a vertical high frequency signal from the extracting unit with the output image signal of the image sensor, and an output image signal of the second solid-state image sensor and a synthesized signal from the second synthesizing unit. A configuration having selection means for alternately selecting every field and matrix means for generating a luminance signal and a color difference signal based on an output image signal of the first solid-state image sensor and an output signal of the selection means. It is.

[0021]

[0022]

Further, the image signal processing apparatus of the present invention, the upper
In order to achieve the above objective, the incident light should be blue light or red light.
First light consisting of green light and second and third light consisting of green light.
A color separation optical system for color separation, and a first light incident thereon.
Blue light and red light to output blue light and red light image signals
First solid-state color television system with standard television resolution
An image pickup element, and a second light incident on the image pickup element, and a green light image pickup signal is generated.
Output the second solid-state image of the standard television system resolution
The image sensor and the third light enter to generate a green light imaging signal.
3rd solid state imaging with enhanced standard television resolution
A pixel position of the first solid-state imaging device,
Relative to the pixel position of the solid-state image sensor
In addition to the shifted arrangement, the pixels of the second solid-state imaging device
Position at least with respect to the pixel position of the third solid-state imaging device
Is also displaced in one direction in the vertical and horizontal directions
Image that performs signal processing on the output imaging signal of the imaging device
A signal processing device, the signal being output from a first solid-state imaging device.
Of the current field and the image signal
To the frame-delayed signal.
A first synthesizing means for outputting Te, extracting means for extracting the first and second high-frequency signal in the vertical direction from the output frame synthesis signal of the first combining means, second solid state imaging device of the imaging apparatus Second synthesizing means for synthesizing the first high-frequency signal from the extracting means to the output image signal of the first and second high-frequency signals from the extracting means to the output image signal of the third solid-state image sensor of the imaging apparatus, respectively. A third synthesizing unit for synthesizing the frequency signal, a first selecting unit for alternately selecting an output image signal of the second solid-state imaging device and a synthesized signal from the second synthesizing unit for each field, Output image signal of the third solid-state image sensor and the third
A second selecting means for alternately selecting a synthesized signal from the synthesizing means for each field, based on an output image signal of the first solid-state image sensor and output signals of the first and second selecting means. This is a configuration having matrix means for generating a luminance signal and a color difference signal.

Further, the second and third synthesizing means converts the first and second luminance signals output from the matrix circuit into
Second and third synthesizing means for synthesizing the first high-frequency signal and the second high-frequency signal from the extracting means, respectively, wherein the first luminance signal output from the matrix circuit and the second synthesizing signal are combined. First selecting means for alternately selecting a combined signal from the means for each field, and a second luminance signal output from the matrix circuit and a combined signal from the third combining means for each field. And a second selecting means for alternately selecting.

Further, the first and second solid-state image sensors having a resolution of a standard television system dedicated to each of blue light and red light, and the third and fourth solid-state imaging devices having a resolution of a standard television system for green light. A first and a second solid-state imaging device for synthesizing frames of output imaging signals of the first and the second solid-state imaging devices.
Synthesizing means, extracting means for extracting first and second high-frequency signals in the vertical direction from output frame synthesized signals of the first and second synthesizing means, and first to fourth solid-state imaging devices, respectively. A matrix circuit for generating a color difference signal and first and second luminance signals based on the picked-up image signal, and a first high frequency signal from the extracting means combined with the first luminance signal output from the matrix circuit; A third synthesizing unit, a fourth synthesizing unit for synthesizing the second high frequency signal from the extracting unit with the second luminance signal output from the matrix circuit, and a first synthesizing unit output from the matrix circuit. First selecting means for alternately selecting a luminance signal and a synthetic signal from the third synthesizing means for each field, and a synthetic signal from the second luminance signal output from the matrix circuit and the fourth synthesizing means And one It is obtained by a structure having a second selecting means for selecting alternately every field.

Here, the pixel position of the first solid-state image sensor among the above-described first to fourth solid-state image sensors is set to be one pixel in the vertical direction relative to the pixel position of the second solid-state image sensor. It is desirable to dispose them at a pitch in that the first and second combining means can be constituted by the same combining circuit.

[0027] This onset in the image signal processing apparatus Ming, the first resolution of the standard television system with blue light and red light shared
And a second solid-state imaging device that outputs an image signal of green light, and the pixel position of the second solid-state imaging device is the pixel position of the first solid-state imaging device. are arranged to be shifted relative direction perpendicular to,
Image signal processing of the output image signal of the image pickup device whose resolution in the vertical direction is higher than the resolution of the standard television system can be performed.
You .

[0028] In addition, the image signal processing apparatus of the present onset Ming,
It is composed of a first solid-state image pickup device for blue light and red light, which has a standard television resolution, and a second solid-state image pickup device for green light, which has a standard television resolution. , The pixel position of the first solid-state imaging device
And the pixel position of the second solid-state image sensor is at least vertically and horizontally shifted with respect to the pixel position of the third solid-state image sensor. It was placed shifted in one direction of the direction
Image signal processing is performed on the output image signal of the imaging device whose resolution in the vertical direction is higher than the resolution of the standard television system.
it can.

Further, in the image signal processing apparatus of the present invention using the above-mentioned three solid-state image sensors, the first and the second signals in the vertical direction are obtained by synthesizing a frame of the output image signal of the first solid-state image sensor. A second high-frequency signal is extracted, the first high-frequency signal is combined with an output imaging signal of the second solid-state imaging device, and the second high-frequency signal is output from the third solid-state imaging device. Green (G) because it is combined with the imaging signal
A high-frequency additional signal of the signal can be generated and input to the matrix means.

Further, in the image signal processing apparatus of the present invention using the above-mentioned three solid-state image pickup devices, the image pickup signal of the current field output from the first solid-state image pickup device and this image pickup signal are output.
A signal obtained by combining an image signal with a signal delayed by one field.
The first and second high-frequency signals in the vertical direction are extracted from the frame composite signal , while the first and second high-frequency signals are generated by a matrix circuit based on the output imaging signals of the first to third solid-state imaging devices.
And the second luminance signal, the first high-frequency signal is combined with the first luminance signal, and the second high-frequency signal is combined with the second luminance signal. In addition, the first and second luminance signals output from the matrix circuit having a smaller number of bits than the number of bits of the output imaging signal of the third solid-state imaging device are converted into the first and / or second high frequency signals. Can be synthesized.

Further, the first and second solid-state image pickup devices having the resolution of the standard television system dedicated to blue light and red light, and the third and fourth solid-state imaging devices having the resolution of the standard television system for green light. In the image signal processing device of the present invention having the solid-state imaging device, the high-frequency signal in the vertical direction extracted from the frame composite signal of the output imaging signal of the first and second solid-state imaging devices is converted into the first to fourth signals. The color difference signal and the first and second color difference signals are respectively
A matrix having a smaller number of bits than the number of bits of the output imaging signal of the first to fourth solid-state imaging devices, since the first and second luminance signals output from the matrix circuit that generates the first luminance signal are combined. The first and second luminance signals output from the circuit can be combined with the first and / or second high frequency signals.

According to another aspect of the present invention, there is provided an image signal processing apparatus comprising: first and second luminance signals output from a matrix circuit or output image signals of second and third solid-state image sensors; A moving region discriminating circuit for generating and outputting a moving region discriminating signal based on the moving region discriminating signal; First limiting means for limiting at the time of discrimination, and second limiting for synthesizing the second high frequency signal to the second luminance signal at the time of moving region discrimination based on the output moving region discriminating signal of the moving region discriminating circuit. And limiting means.

Further, the image signal processing apparatus of the present invention selects one of the synthesized signal and the first luminance signal output from the matrix circuit based on the output moving area discrimination signal of the moving area discriminating circuit, and A third selection means for outputting to the selection means, and a second selection by selecting one of the synthesized signal and the second luminance signal output from the matrix circuit based on the output dynamic area determination signal of the dynamic area determination circuit. And a fourth selecting means for outputting to the means.

Further, the image signal processing apparatus of the present invention has a first
A moving area discrimination signal from a moving area discriminating circuit is superimposed on a field pulse for causing the second selecting means to perform a selecting operation for each field, and a superimposed signal is generated. Is selected, and when the moving area is determined, the first signal output from the matrix circuit is forcibly output.
And a superimposing means for selecting the second luminance signal.

Thus, according to the present invention, when the moving area is determined by the moving area determination signal, the first vertical direction is finally determined.
And the first and second luminance signals not synthesized with the second high frequency signal.

[0036]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a first embodiment of an imaging apparatus according to the present invention. As shown in the figure,
The imaging device according to the present embodiment includes a first prism 41 and a second prism 41.
Color separation optical system such as a prism 42, an RB trimming filter 43, a G trimming filter 44, and a color filter 45, and a solid-state imaging device 46 for R / B that shares R and B signals.
RB and G solid-state imaging device 46G. That is, the solid-state imaging device according to this embodiment has 46RB and 46G.
It is two sheets. The first prism 41 has a dichroic film 41a.

The R / B solid-state image pickup device 46RB and the G solid-state image pickup device 46G are commercially available solid-state image pickup devices for the PAL system (858 pixels in the horizontal direction and 726 pixels in the vertical direction). When this is used for the Hi-Vision system, it is impossible to secure 1,035 effective scanning lines per frame of the Hi-Vision system, and therefore, 1/2 of that, that is, 518 lines obtained by rounding up 517.5 lines are effective. The number of scanning lines is set, and the number of effective horizontal pixels is set to 808 corresponding to the aspect ratio 16: 9 of the high-vision system (the same applies to each solid-state imaging device described later).

Next, a method for obtaining a resolution equivalent to the Hi-Vision system in the vertical direction will be described. The vertical resolution of the HDTV system is NTSC or PAL.
The number of effective scanning lines of the solid-state imaging devices 46RB and 46G of this embodiment is 518 (518 pixels in the vertical direction), which is about twice as large as that of the standard system. It is 1/2 of.

Therefore, in this embodiment, the R / B solid-state image sensor 46RB is replaced by the R / B solid-state image sensor 46RB with respect to the G solid-state image sensor 46G, as in the image pickup device previously proposed by the present applicant.
As shown in the figure, the phase is shifted relatively by a half pixel pitch in the vertical direction. The luminance signal Y that determines the vertical resolution of an image is expressed as Y = 0.212R + 0.701G + 0.087B in the Hi-Vision system. Therefore, the luminance signal Y is mainly determined by the G signal, but also depends on the R signal and the B signal. I have. Therefore, by effectively utilizing the R / B solid-state imaging device 46RB to generate the luminance signal Y, the vertical resolution can be improved.

As shown in FIG. 3, the color filter 45 provided on the light incident side of the R / B solid-state image pickup device 46RB selectively transmits a light component having a wavelength of red (R) light in the vertical direction.
The filter section 45R of 26 pixels and the filter section 45B of 756 pixels in the vertical direction, which selectively transmits the light component of the wavelength of blue (B) light, are alternately arranged in the horizontal direction by one pixel pitch.

Next, the operation of the present embodiment having the above configuration will be described. In FIG. 1, light from a subject (not shown) is incident on a first prism 41, and light components in the R and B light wavelength bands are reflected by a dichroic film 41a, and light components in a G light wavelength band are reflected. Is transmitted. The R and B light components are reflected by the light incident surface of the first prism 41, and further pass through the RB trimming filter 43 and pass through the color filter 45.
Is incident on the R / B solid-state imaging device 46RB.
The light is separated into R and B components by the action of the color filter 45.

The G light component transmitted through the dichroic film 41a is reflected by the rear end face of the second prism 42, and further transmitted through the G trimming filter 44 to be incident on the G solid-state imaging device 46G.

Next, an embodiment of an image signal processing device using the image pickup device of FIG. 1 will be described. FIG. 4 shows a block diagram of a first embodiment of an image signal processing device using the imaging device of FIG. In the figure, the solid-state imaging device 46R
The imaging signals output from B and 46G are A
Digital signal (pixel data) DRB by the / D converter
And DG, and the digital signal DRB is frame-synthesized by the field memory 48 and the frame synthesizing circuit 49, and then supplied to the vertical high-pass filters 51 and 52, respectively.

The vertical high-pass filters 51 and 52 are based on the frame composite signal DRB, and the blue signal B of the odd field is
m, n and the blue signal bm, n of the even field are expressed by the equations (5) and (6) of the equation 2, and the red signal Rm + 1, n of the odd field and the red signal rm + 1, n of the even field are expressed by the equation (7). And (8) are performed to generate vertical high frequency signals VH1 and VH2. In equations (5) to (8) and the following equations, m horizontal pixels and n vertical lines are used.

[0045]

(Equation 2) The vertical high frequency signal VH1 is supplied to the adder 54, where it is added to the signal DG to form a wideband high frequency additional signal G ^* . The vertical high frequency signal VH2 is supplied to an adder 55, where it is added to a signal DG 'obtained by interpolating the digital signal DG by a vertical interpolation circuit 53, and becomes a wideband high frequency additional signal G' ^*. . The changeover switches 80 and 81 select the high-frequency additional signals G ^* and G ' ^* in the odd fields and select the solid-state image sensor output signals DG and DG' as they are in the even fields based on the field pulse.

The matrix circuit 57 outputs a luminance signal Y and color difference signals BY and RY based on the output signals of the changeover switches 80 and 81 and the R signal and the B signal decomposed from the signal DRB by the RB decomposing circuit 50. Are generated and output to the double speed conversion circuit 58. The double speed conversion circuit 58 outputs a luminance signal Y (G
H), and generates and outputs color difference signals RY (RH) and BY (BH), respectively.

FIG. 5 is a block diagram showing a second embodiment of the image signal processing device using the image pickup device of FIG. 4, the same components as those of FIG. 4 are denoted by the same reference numerals, and the description thereof will be omitted. In FIG. 5, a matrix circuit 59 receives 10-bit digital signals (pixel data) DRB and DG obtained by passing image signals output from the solid-state image sensors 46RB and 46G through an A / D converter (not shown). Based on the luminance signal Y of 8 bits each.
And the color difference signals RY and BY are generated.

The reason why the input signal of the matrix circuit 59 has a data length longer than the required 8-bit signal is that the 8-bit luminance signal Y and color-difference signals RY and B required by minimizing the error due to the matrix operation are minimized. This is for obtaining -Y.

On the other hand, the vertical high frequency signal VH1 is added to the adder
62, where the 8 bits from the matrix circuit 59 are output.
Is added to the luminance signal Y of the high-frequency
No.Y^* It is said. The vertical high frequency signal VH2 is added.
The digital luminance signal Y is supplied to the
The signal Y ′ obtained by interpolation by the direct interpolation circuit 61 is added to
And a broadband high-frequency additional luminance signal Y '^*It is said. Switching
Switches 70 and 71 are based on the field pulse,
Luminance signals Y and Y 'and the high-frequency additional luminance signal Y^* And Y '^*
Are alternately selected for each field.

The double speed conversion circuit 58 is provided with these changeover switches 7
RY and BY signals decomposed by the RY and BY decomposing circuit 60 from the output signals 0 and 71 and the output color difference signals (RY) and (BY) of the matrix circuit 59. , A luminance signal Y (GH), a color difference signal RY (RH), and a BY (BH) of the high-vision system are generated and output.

As described above, according to the present embodiment, it is possible to output a high-resolution image signal with an inexpensive configuration using two solid-state imaging devices.

Next, a description will be given of a second embodiment of the imaging apparatus according to the present invention. FIG. 6 shows a second example of the imaging apparatus of the present invention.
FIG. 1 shows a configuration diagram of an embodiment. In the figure, the same components as those in FIG. 1 are denoted by the same reference numerals. In the present embodiment, a color separation optical system including a first prism 41, an RB trimming filter 43, a second prism 65, a third prism 66, G trimming filters 67 and 68, and a color filter 45 is provided. Solid-state imaging devices 46RB, 69G1 and 69G
Consists of two.

The pixel arrangement of the solid-state image sensors 69G1 and 69G2 is the same as that of the solid-state image sensor 46RB. Therefore, in order to obtain the number of effective horizontal scanning lines corresponding to the high-vision system, as shown in FIG.
2, the R / B solid-state imaging device 46RB is vertically shifted by a half pixel pitch in the vertical direction, and the G solid-state imaging device 69G2 and the G solid-state imaging device 69
G1 is shifted by one pixel pitch in the vertical direction as shown in FIG. 7B to improve the vertical resolution of the image.

In the present embodiment, the solid-state G image pickup device 69G2 and the solid-state G image pickup device 69G1 are also displaced by a half pixel pitch in the horizontal direction. It is also trying to improve.

Next, the operation of the imaging apparatus having the above configuration will be described. In FIG. 6, light from a subject (not shown) is incident on a first prism 41, and light components in the R and B light wavelength bands are reflected by a dichroic film 41a.
The light component of the light wavelength band is transmitted. The R and B light components are reflected by the light incident surface of the first prism 41, further pass through the RB trimming filter 43, and enter the R / B solid-state imaging device 46RB via the color filter 45. The light is separated into R and B components by the action of the color filter 45.

The G light component transmitted through the dichroic film 41 a is transmitted to the half mirror 65 of the second prism 65.
Part of the light is reflected by a, and further passes through the G trimming filter 67 to be incident on the G solid-state imaging device 69G1. The remainder is transmitted by the half mirror 65a, passes through the third prism 66 and the G trimming filter 68, and is incident on the G solid-state imaging device 69G2.

As described above, the three solid-state imaging devices 46R
FIG. 8 shows an arrangement of pixels when an image signal obtained by processing the image signals obtained by B, 69G1 and 69G2 by a signal processing circuit described later is viewed on a screen. In the figure, a circle represents a pixel G1 of the G signal output from the G solid-state imaging device 69G1, and a square represents a G solid-state imaging device 69G2.
G2 output from the pixel G2, the upward triangle mark is R
The pixel of the R signal output from the / B solid-state imaging device 46RB and the downward triangle mark indicate the pixel of the B signal output from the R / B solid-state imaging device 46RB. White marks indicate pixels in odd fields, and black marks indicate pixels in even fields. Further, the numbers indicate the scanning line numbers in the high definition image.

As described above, since the solid-state imaging devices 69G1 and 69G2 are arranged with a shift of 1/2 pixel pitch in the horizontal direction, the display positions of these pixels G1 and G2 are indicated by circles and squares in FIG. As indicated by the marks, they are arranged alternately on the same scanning line, and are shifted by one pixel pitch in the vertical direction, so that the fields of adjacent pixels in the horizontal direction are different. That is, the pixels G1 and G2
Are arranged alternately in white and black in the horizontal direction as shown in FIG.

In the vertical direction, odd fields and even fields appear alternately, and thus, each of the above-described pixel G1 and square pixel is alternately arranged in white and black. These pixels are located on horizontal scanning line numbers 603 to 1120, which are even fields of the high-definition image.
In the reading of 9G2, pixels with white marks are odd fields, and black marks are even fields.

On the other hand, the solid-state image sensor 46RB for R / B
8 is vertically shifted with respect to the solid-state image sensor 69G2, and as shown in FIG. 8, the signal output from the solid-state image sensor 46RB for R / B indicated by a triangle mark. The display positions of the pixels are vertically shifted from the display positions of the pixels of the G solid-state imaging devices 69G1 and 69G2 indicated by circles and squares by a 1/2 pixel pitch. The R / B solid-state imaging device 46RB
The color filter 45 provided on the light incident side of the
Since the 5R and the filter unit 45B are arranged alternately in the horizontal direction by one pixel pitch, the pixel of the R signal output from the solid-state imaging device 46RB for R / B indicated by the upward triangle and the R / R The pixels of the B signal indicated by the downward triangle mark output from the B solid-state imaging device 46RB are alternately arranged in the horizontal direction by one pixel pitch.

Further, in the vertical direction, odd fields and even fields appear alternately. Therefore, the pixels of the R signal indicated by the upward triangle and the B signal indicated by the downward triangle are displayed.
In each of the pixels of the signal, white and black are alternately arranged.
These pixels are located on each of the horizontal scanning line numbers 41 to 557, which are odd fields of the high-definition image. However, reading of the solid-state image sensor 46RB is based on the following. It is.

The positions of the pixels thus obtained are shown in FIG.
It can be shown as follows. That is, if pixels at arbitrary positions (horizontal m pixels, vertical n lines) in FIG. 8 are taken and numbered, the result is as shown in FIG. In the figure, capital letters G, B, and R are odd fields, small letters g,
“b” and “r” indicate pixels to be read in the even-numbered fields, respectively. “G” and “g” are green signals, “R”
And "r" indicate a red signal, and "B" and "b" indicate a blue signal, respectively. The uppercase letters “1” and “2” indicate pixels read from the solid-state imaging devices 69G1 and 69G2, respectively.

Since the three solid-state imaging devices are driven simultaneously, the same pixel at (m, n) is read out simultaneously. For example, three of G1m, n, G2m, n, and Bm, n are read simultaneously in odd fields, and g1m, n, g2m, n, bm,
Three of n are read simultaneously in even fields. One pixel before or one pixel after the blue signal B, b
, The red signals R and r are read out (for example, G1m-
Rm-1, n are read out together with 1, n, G2m-1, n. ).

Focusing on the positions of the R, r, B, and b pixels, in both odd and even fields,
These pixels are arranged alternately. This is because the color filter 45 provided on the light incident side of the solid-state image pickup device 46RB.
Is a strip-shaped filter configuration in which the filter units 45R and the filter units 45B are alternately arranged at a pitch of one pixel in the horizontal direction. In FIG. 8, an upward triangle mark and a downward triangle mark each represent one pixel in the horizontal direction. This corresponds to being alternately arranged by pitch.

Next, the above-mentioned three solid-state image sensors 46R
B, the configuration of the image signal processing circuit output from 69G1 and 69G2 will be described. FIG. 10 shows a block diagram of a third embodiment of the image signal processing device according to the present invention. In the figure, the same components as those of FIG.
The description is omitted. This embodiment is an image signal processing device using the imaging device of FIG.

In FIG. 10, three solid-state imaging devices 46 are provided.
The imaging signals output from RB, 69G1 and 69G2 are converted into digital signals DR by an A / D converter (not shown).
B (ie, B (b), R (r)), DG1 (ie, G1, g1) and DG2 (ie, G2, g2), respectively.

On the other hand, each of the vertical high-pass filters 51 and 52
The output vertical high frequency signal VH1 is input to the adder 78.
DG1 is added to the signal DG1 to obtain a wide band high frequency band represented by the following equation.
Additional signal G1^* It is said.

G1 ^* m, n = G1m, n + VH1m, n (9) Further, the vertical high-frequency signal VH2 extracted from the vertical high-pass filter 52 is input to the adder 79, and the signal DG2
And the addition represented by the following equation is performed to obtain a wideband high-frequency additional signal G2 ^* .

G2 ^* m, n = G2m, n + VH2m, n (10) The changeover switch 80 selects the high-frequency additional signal G1 ^* in the odd field based on the field pulse, and outputs the solid-state image sensor output signal DG1 in the even field. Select as is. Similarly, the changeover switch 81 selects the high-frequency additional signal G2 ^* for odd fields and the solid-state imaging device output signal DG2 for even fields based on the field pulse. The matrix circuit 82 outputs the output signals of the changeover switches 80 and 81 and the signals DRB to RB
Based on the R signal and the B signal decomposed by the decomposing circuit 50, the luminance signals Y1 and Y2 and the color difference signals BY and RY
Are generated and output to the double speed conversion circuit 83.

The double-speed conversion circuit 83 outputs a luminance signal Y (GH) and a color difference signal RY of the high-vision system based on the input signal.
(RH) and BY (BH) are generated and output. The double speed conversion circuit 83 itself is a known circuit and has a configuration as shown in FIG. 11, for example. In the figure, luminance signals Y1, Y2 and color difference signals BY, RY from a matrix circuit 82 are stored in line memories 91, 9 respectively.
3, 96 and 100 are stored as pixel data for one line. The horizontal scanning frequency of these input signals is one of the horizontal scanning frequency f _{H in} the case of the high vision system.
The frequency is 16.875 kHz, which is twice as high as the frequency of / 2. The signal reading scanning frequency of the PAL type solid-state imaging device is 15.6.
Although it is 25 kHz, this value is almost the same as _fH / 2, so that it can be used without taking special measures.

Line memories 91, 93, 96 and 100
At the time when each line of input pixel data is stored, the next-stage line memories 92, 94, 97 and 98, 1
01 and 102 are output at high speed and stored.
The signals stored in the line memories 92, 94, 97 and 98, 101 and 102 based on the output control signal of the output control unit 104 are the horizontal scanning frequency f _{H of the} HDTV system.
Is read.

The pixel data read from the line memories 92 and 94 is input to the changeover switch 95, and the pixel data read from the line memories 97 and 98 is input to the changeover switch 99, and the line memories 101 and 102
The pixel data read out from is input to the changeover switch 103. The changeover switches 95, 99, and 103 are respectively operated by the control signal from the output control unit 104 so that the input pixel data is set in the order of the high-vision scanning.
Scan conversion is performed by alternately selecting and outputting every line.

The signals obtained from the changeover switches 95, 99 and 103 in this way are the image signals Y, PB and PR of the high vision system represented by the following equations.

Y = 0.715G + 0.0721B + 0.2125R PB = 0.5389 (-0.7154G + 0.9279B-0.2125R) PR = 0.6749 (-0.7154G + 0.0721B-0.7875R) According to the present embodiment, Since the number of the imaging elements is three, the configuration can be less expensive than the imaging apparatus and the image signal processing apparatus proposed by the present applicant. In the present embodiment, the high-frequency component in the vertical direction of the G image is extracted from the output image signal of the R / B solid-state image sensor 46RB and added to the G image signal. Can be obtained.

FIG. 12 is a block diagram showing a fourth embodiment of the image signal processing apparatus according to the present invention. In FIG.
The same components as those described above are denoted by the same reference numerals, and description thereof will be omitted. This embodiment is an image signal processing device using the imaging device of FIG.

In FIG. 12, a 10-bit digital signal DRB output from the solid-state image sensor 46RB and obtained through an A / D converter (not shown)
The 10-bit digital signals DG1 and DG2 output from the 9G1 and 69G2 and obtained through an A / D converter (not shown) are supplied to the matrix circuit 109, respectively, and are expressed by the following equations (11) to (14). The 8-bit luminance signals Y1, y1, Y2, and y2 shown, and the 8-bit color difference signals RY and r shown in Equations (15) to (18).
-Y, BY, and by.

Y1m, n = 0.701G1m, n + 0.212Rm + 1, n + 0.087Bm, n (11) Y2m, n = 0.701G2m, n + {0.212 (Rm-1, n + Rm + 1, n) / 2｝ +0. 087Bm, n (12) y1m, n = 0.701g1m, n + 0.212rm + 1, n + 0.087bm, n (13) y2m, n = 0.701g2m, n + {0.212 (rm-1, n + rm + 1, n) / 2 ｝ + 0.087bm, n (14) (RY) m + 1, n = Rm + 1, n-Ym + 1, n (15) (BY) m, n = Bm, n-Ym, n (16) (ry) m + 1, n = rm + 1, n-ym + 1, n (17) (by) m, n = bm, n-ym, n (18) matrix Since the R signal and the B signal are alternately input as the signal DRB for each pixel according to the striped arrangement of the color filter 45, the matrix circuit 109
, The color difference signals (RY) and (B-
Y) are output. The color difference signals (RY) and (B-
Y) are synchronized and decomposed by the RY and BY decomposing circuits 110, respectively, and supplied to the double-speed solving circuit 115 in parallel.

The luminance signals Y1 and y1 output from the matrix circuit 109 are supplied to an adder 111.
The signal is added to the signal from the vertical high-pass filter 51 to obtain a wideband high-frequency additional signal Y1 ^* represented by the equation (19).

Y1 ^* m, n = Y1m, n + VH1m, n (19) The luminance signal Y output from the matrix circuit 109
2 and y2 are supplied to the adder 112, and are added to the signal from the vertical high-pass filter 52 to be a wideband high-band additional signal Y2 ^* represented by the equation (20).

Y2 ^* m, n = Y2m, n + VH2m, n (20) The changeover switch 113 selects the high-frequency additional signal Y1 ^* for the odd field based on the field pulse, and the 8-bit of the matrix circuit 109 for the even field. Output signal y
Select 1 as it is. Similarly, the changeover switch 114 selects the high-frequency additional signal Y2 ^* for the odd field and the output signal y2 of the matrix circuit 109 as it is for the even field based on the field pulse.

The double speed conversion circuit 115 is based on the output signals of the changeover switches 113 and 114 and the output color difference signal of the matrix circuit 109, and outputs a luminance signal Y (GH), a color difference signal RY (RH) and a color difference signal RY of the HDTV system. Y (B
H) is generated and output. This double speed conversion circuit 1
The configuration 15 includes a line memory and a switch circuit as in the case of the double speed conversion circuit 83.

According to the present embodiment, matrix circuit 1
8-bit luminance signal Y1 (y1) extracted from the pixel 09
Is added to the output signal of the multiplier 54 by the adder 111, and the adder 112 adds the vertical high frequency signal VH2 and the luminance signal Y2 (y2). The configuration of the adders 111 and 112 can be simplified as compared with the prior proposed device of the applicant of the present invention that adds the two.

Next, two G solid-state image sensors which are shifted by one pixel pitch in the vertical direction and １ ／ pixel pitch in the horizontal direction are prepared, and one solid-state image sensor for G is provided. B, R shifted by 1/2 pixel pitch in the vertical direction
An embodiment will be described in which a color separation optical system using a total of four solid-state imaging elements, in which a solid-state imaging element is arranged, is provided. FIG. 13 shows an embodiment of a pixel arrangement in the case of having a color separation optical system using the four solid-state imaging devices,
FIG. 14 is a block diagram showing a fifth embodiment of the image signal processing apparatus according to the present invention in this case. 14, the same components as those of FIG. 12 are denoted by the same reference numerals, and description thereof will be omitted.

In FIG. 13, uppercase letters G, B, and R are pixels read out in odd fields, lowercase letters g, b, and r are pixels read out in even fields, respectively.
Indicates a green signal, “R” and “r” indicate a red signal, and “B” and “b” indicate a blue signal, respectively. In addition, capital letters “1” and “2” indicate pixels read from the two G solid-state imaging devices, respectively. Furthermore, "r
“b” and “RB” are pixels from which the R signal and the B signal are simultaneously and separately read from the respective solid-state imaging devices.

Since the four solid-state imaging devices are driven simultaneously as in the conventional case, the same pixels (m, n) are read out simultaneously. For example, G1m, n, G2m, n, RBm, n (= Rm, n,
Bm, n) are simultaneously read in odd fields. Focusing on the positions of R, r and B, b pixels,
In both odd and even fields, pairs of these pixels are arranged. This is because the R solid-state imaging device and the B solid-state imaging device are arranged at the same pitch without being shifted in the vertical direction.

Next, a processing device for the image pickup signals output from these four solid-state image pickup elements will be described with reference to the block diagram of FIG. In the figure, B pixel data DB and R pixel data DR taken out from B and R solid-state imaging devices and obtained through an A / D converter (not shown) are:
Field memories 121 and 122 and frame synthesis circuit 1
The frames are synthesized by 23 and 124 and input to the corresponding vertical high-pass filters 125 and 126. The vertical high-pass components extracted from the vertical high-pass filters 125 and 126 are supplied to adders 127 and 128, respectively, where they are subjected to an addition operation according to the following equation to obtain vertical high-pass frequency signals VH1 and VH.
2 is generated.

[0087]

(Equation 3) On the other hand, input digital signals (pixel data) DB, DR, DG1 and DG2 of 10 bits each are supplied to a matrix circuit 1
The luminance signals Y1, Y2, and y of 8 bits are supplied to the pixel 29 and are subjected to a matrix operation of the following equations (23) to (26).
1 and y2 are generated.

Y1m, n = 0.701G1m, n + {0.212 (Rm, n + Rm + 1, n) / 2} +0.087 (Bm, n + Bm + 1, n) / 2 (23) Y2m, n = 0.701G2m, n + 0.212Rm, n + 0.087Bm, n (24) y1m, n = 0.701g1m, n + {0.212 (rm, n + rm + 1, n) / 2} +0.087 (bm, n + bm + 1, n) / 2 (25) y2m, n = 0.701g2m, n + 0.212rm, n + 0.087bm, n (26) Further, the matrix circuit 129 is obtained by using the above formulas (15) to (1).
The color difference signals (RY), (BY), (r-
y) and (by) are generated and output. Matrix circuit 1
The luminance signals Y1 and y1 output from the
1 and is added to the signal from the adder 127 to obtain a wideband high-frequency additional signal Y1 ^* represented by the equation (19). Further, the luminance signals Y2 and y2 output from the matrix circuit 129 are supplied to the adder 112 and added to the signal from the adder 128, whereby the wideband high-frequency additional signal Y2 represented by the equation (20) is obtained. ^*

Also in this embodiment, since the 8-bit luminance signal extracted from the matrix circuit 129 is added to the other 8-bit signals by the adders 111 and 112, similarly to the embodiment of FIG. The configuration of the adders 111 and 112 can be simplified as compared with the above-mentioned device proposed by the present applicant.

Next, as in the above-described imaging apparatus proposed by the present applicant, two G solid-state imaging elements shifted in the vertical direction by one pixel pitch and shifted in the horizontal direction by 画素 pixel pitch are used. And a half pixel pitch in the vertical direction with respect to one G solid-state imaging device, and
An embodiment will be described in which a color separation optical system using a total of four solid-state imaging devices, in which solid-state imaging devices for B and R shifted from each other by one pixel pitch in the vertical direction are arranged.

FIG. 15 shows an embodiment of a pixel arrangement in the case of having a color separation optical system using the above-mentioned four solid-state imaging devices, and FIG. 16 shows a sixth embodiment of the image signal processing apparatus of the present invention in this case. FIG. 1 shows a block diagram of an embodiment. FIG. 15, FIG.
14 and 15, the same components are denoted by the same reference numerals, and the description thereof will be omitted. In the present embodiment, as shown in FIG. 15, "R and b" and "r and B"
And the pixel position of the R signal in one of the odd and even fields is superimposed on the pixel position of the B signal in the other field.

This is because the B and R solid-state image pickup devices are optically shifted by one pixel pitch in the vertical direction. Thereby, as shown in FIG. 16, the input signals DB and DR are simply input to the frame synthesizing circuit 131 without using a field memory, thereby enabling frame synthesizing.

The vertical high-pass filter 132 is given by the following equation (27).
The vertical high-frequency signal VH1 is generated by performing the operation shown in the equation, and the vertical high-pass filter 133 generates the vertical high-frequency signal VH2 by performing the operation shown in equation (28).

[0094]

(Equation 4) On the other hand, input digital signals (pixel data) DB, DR, DG1 and DG2 of 10 bits each are supplied to a matrix circuit 1
The luminance signal Y1, Y2, and y of 8 bits are supplied to the E.34 and are subjected to a matrix operation of the following equations (29) to (32).
1 and y2 are generated.

Y1m, n = 0.701G1m, n + {0.212 (Rm, n-1 + Rm + 1, n-1) / 2} +0.087 (Bm, n + Bm + 1, n) / 2 (29) Y2m, n = 0.701G2m, n + 0.212Rm, n + 0.087Bm, n (30) y1m, n = 0.701g1m, n + {0.212 (rm, n-1 + rm + 1, n-1) / 2} +0.087 (bm, n + bm + 1, n) / 2 (31) y2m, n = 0.701g2m, n + 0.212rm, n + 0.087bm, n (32) Further, the matrix circuit 134 has the above-mentioned formula (15) to (1).
The color difference signals (RY), (BY), (r-
y) and (by) are generated and output. Matrix circuit 1
The luminance signals Y1 and y1 output from the
1 and is added to the signal from the vertical high-pass filter 132 to be a wideband high-band additional signal Y1 ^* represented by Expression (19). Also, the matrix circuit 13
4 are added to the luminance signals Y2 and y2.
And is added to the signal from the vertical high-pass filter 133 to obtain a wideband high-band additional signal Y2 ^* represented by the equation (20).

Also in the present embodiment, adders 111 and 112 add an 8-bit luminance signal extracted from matrix circuit 134 to other 8-bit signals, similarly to the embodiments of FIGS. The adders 111 and 112
Can be simplified as compared with the above-mentioned device proposed by the present applicant. Further, as compared with the embodiment of FIG. 14, the field memories 121 and 122 are not required, and the circuit configuration can be simplified.

In the first to fifth embodiments of the above-mentioned image signal processing apparatus except for the sixth embodiment of FIG. 16, the image signal processing proposed by the present applicant is described above. Since the vertical high-pass component is obtained using the field memory and the vertical high-pass filter as in the device, there is a possibility that a correct vertical high-pass component cannot be obtained in the moving region. This problem is caused by the difference in image information between fields in the moving area. Therefore, the problem can be solved by determining the moving area and preventing the vertical high frequency component from being added to the final output luminance signal in that case. That is, in order to solve the above-mentioned problem, a determination circuit for determining a moving region and a selection means for selecting one of a signal to which a vertical high-frequency component is added and a signal not to be added based on the moving region determination signal are provided. The problem can be solved by providing it in the signal processing device.

Therefore, each example of the moving area discriminating circuit will be described first. FIG. 17 is a block diagram of a first example of the moving area determination circuit. Inputs 1 and 2 are the solid-state imaging device output signals (imaging signals) DG1 and DG2 or the output luminance signals Y1 and Y2 of the matrix circuits 82, 109, and 129, respectively.
2), (DG2, DG1), (Y1, Y2), (Y2,
There are four sets of Y1), and any of them may be used.

Since these two input signals are obtained from the solid-state image pickup device for G which is arranged with a shift of 1/2 pixel pitch in the horizontal direction, if either signal is horizontally interpolated to obtain no difference, the two input signals are correct. The moving area cannot be determined. for that reason,
17, the first input signal is supplied to the adder 142 through the delay circuit 141 having a delay time of one sampling period, and is directly supplied to the adder 142 to be added. The level is supplied to the unit 143, and its level is reduced by half.

That is, the delay circuit 141 and the adder 142
Is added to the pixel from which the current first input signal is obtained and the signal of the pixel one pixel before the current pixel, and the added signal is averaged by the multiplier 143. Therefore, the first input signal is output from the multiplier 143. , An image signal or a luminance signal ID1 equivalent to a signal from a pixel position shifted by a half pixel pitch in the horizontal direction is obtained.

On the other hand, the second input signal is supplied to the field memory 144, where it is delayed by approximately one field, and then supplied to the subtractor 145 as a delayed signal ID2, where it is subtracted from the signal ID1. That is, the subtractor 1
The signals ID1 and ID2 input to the pixel 45 are different from each other by one field, and are signals at the same pixel position in the horizontal direction. The subtractor 145 obtains the difference between these signals ID1 and ID2, 146.

The threshold circuit 146 calculates the absolute value of the input difference value, compares the absolute value with a preset threshold value, and converts a binary signal of logic 1 or 0 according to the comparison result into the moving area determination signal M.
It is output to the output terminal 147 as VD. Here, when the absolute value of the difference value is larger than the threshold value, it is determined that the image information for one field has changed greatly, and it is determined that the image is a moving area. Note that the subtractor 145 calculates the difference between the input signals ID1 and ID2. However, since the threshold value circuit 146 calculates the absolute value of the difference value, the direction of the subtraction does not matter.

FIG. 18 is a block diagram showing a second example of the moving area determination circuit. 17, the same components as those of FIG. 17 are denoted by the same reference numerals, and the description thereof will be omitted. In FIG. 18, the second input signal delayed by approximately one field in the field memory 144 is further delayed by one sampling period, a delay circuit 150 for adding the input signal and the output signal of the delay circuit 150, and an adder 151. The circuit unit including the multiplier 152 for halving the output signal level of the multiplier 151
Signal I from a pixel shifted by 1/2 pixel pitch in the horizontal direction
D2 'is supplied to the subtractor 153, where it is subtracted from the first input signal ID1'.

That is, in the example shown in FIG. 17, while the first input signal is horizontally interpolated so as to match the second input signal, the example shown in FIG. The signal is horizontally interpolated so as to match the first input signal. Also in this case, the output terminal 147 of FIG.
7 is output.

FIG. 19 is a block diagram showing a third example of the moving area discriminating circuit. In the examples shown in FIGS. 17 and 18, the moving area is determined from the difference between the same pixel position information different from each other by one field. That is, if a high frequency component is included in the signal for determining the moving region, there is a possibility that the determination may be erroneous in the periphery of the moving region.

Therefore, in the dynamic region discriminating circuit shown in FIG. 19, a first low-pass filter (LPF) 155 for removing a high frequency component from the first input signal is provided, and the second input signal is substantially eliminated. A second low-pass filter (LPF) 157 for removing high frequency components from the output signal of the field memory 156 delayed by one field is provided.
The output signals ID1 ″ and ID2 ″ of the PFs 155 and 157 are subtracted by a subtractor 158 to obtain a difference. In addition, LPF155
And 157 also have a horizontal interpolation effect because they have a delay time, so that their frequency characteristics and their positions on the image can be matched.

The difference value extracted from the subtractor 158 is
After the absolute value is obtained by the threshold circuit 159, the absolute value is compared with a predetermined threshold value, and the threshold value discrimination signal MVD "according to the comparison result is obtained.
Is output to the output terminal 160.

FIG. 20 is a block diagram showing a fourth example of the moving area determination circuit. 19, the same components as those of FIG. 19 are denoted by the same reference numerals, and the description thereof will be omitted. In FIG. 20, the output signal of the threshold circuit 159 is supplied to a region enlarging circuit 161 where the difference value is larger than the threshold value and the signal MVD ″ determined to be a moving region is determined in the horizontal and vertical directions. The signal is output to the output terminal 162 as a moving area determination signal MVD ′ ″.

In the dynamic region discriminating circuit shown in FIG.
Due to factors such as the characteristics of F155 and F157 and restrictions due to the circuit scale, there is a possibility that an erroneous determination will be made at the periphery of the region determined to be a moving region. For example, to implement a two-dimensional filter, several line memories of several bit words must be used. On the other hand, in the moving area determination circuit shown in FIG. 20, since the area surrounding the area determined as the moving area by the area expanding circuit 161 is also determined as the moving area, the above problem can be solved. Is a process for a 1-bit output signal from the threshold circuit 159, so even if it is expanded two-dimensionally, the circuit scale does not increase so much.

In each example of the moving area discriminating circuit shown in FIGS. 18 to 20, the connection order of the field memory 144 and the circuit section (150 to 152) for horizontal interpolation, and the connection between the field memory 156 and the LPF 157. The order can be reversed.

Next, a description will be given of an image signal processing apparatus according to the present invention including each example of a luminance signal processing circuit for preventing a vertical high frequency component from being added to a final output luminance signal in a moving area.

FIG. 21 is a block diagram showing a main part of a seventh embodiment of the image signal processing apparatus according to the present invention provided with the above-mentioned luminance signal processing circuit. 12, input terminals 165 and 166 are luminance signal or imaging signal input terminals.
When applied to the fourth embodiment, the matrix circuit 10
9, 129 are output luminance signals Y1 and Y2, and when applied to the embodiment shown in FIG.
DG2 is input.

Input terminals 167 and 168 in FIG. 21 are input terminals for vertical high frequency signals VH1 and VH2.
And when applied to the embodiment of FIG. 12, the output high-frequency signals VH1 and VH1 of the vertical high-pass filters 51 and 52.
When H2 is input and applied to the embodiment shown in FIG. 14, the output vertical high frequency signals VH1 and VH2 of the adders 127 and 128 are input.

The input terminal 169 shown in FIG. 21 is a field pulse input terminal, and the input terminal 170 is shown in FIGS.
MVD (or MVD ′, MVD ″, MV) output from any of the moving region determination circuits shown in FIG.
D ′ ″) is input.

Further, when the adders 171 and 172 of FIG. 21 are applied to the embodiments of FIGS. 12 and 14, they correspond to the adders 111 and 112, and are applied to the embodiment of FIG. Corresponds to the adders 78 and 79. Also,
The changeover switches 175 and 176 of FIG.
When applied to the fourth embodiment, the changeover switch 11
3 and 114, and corresponds to the changeover switches 80 and 81 when applied to the embodiment shown in FIG. As described above, the embodiment of FIG. 21 can be applied to any of FIGS. 10, 12, and 14, and the changeover switches 173 and 174 are provided in any of these embodiments.

In this embodiment, the moving area discrimination signal MVD input to the input terminal 170 is applied as a switching signal to the changeover switches 173 and 174. Normally, the changeover switches 173 and 174 are connected to the terminal a respectively. The vertical high frequency signals VH1 and VH2 input through the input terminals 167 and 168 are selected and the adder 17 is selected.
1, 172. When the moving area determination signal MVD is a logical value indicating the moving area, the changeover switch 173 is supplied.
And 174 are connected to the terminal b side, respectively, and the supply of the vertical high frequency signals VH1 and VH2 input via the input terminals 167 and 168 to the adders 171 and 172 is forcibly cut off.

Thus, the final output luminance signal output from the output terminals 177 and 178 to the double speed conversion circuit 115 in FIG. 12 or FIG. 14 or the luminance signal output to the matrix circuit 82 in FIG. The high frequency signals VH1 and VH2 can be prevented from being added, and the image quality can be prevented from deteriorating.

FIG. 22 is a block diagram showing a main part of an eighth embodiment of the image signal processing apparatus of the present invention provided with the above-mentioned luminance signal processing circuit. In the figure, the same components as those of FIG. 21 are denoted by the same reference numerals, and description thereof will be omitted. In the embodiment shown in FIG. 22, one of the input signal and the output signal of the adders 171 and 172 is selected by the moving area discrimination signal MVD, and the changeover switch 181 outputs to the changeover switches 175 and 176.
182 are provided.

In this embodiment, normally, the changeover switches 181 and 182 are respectively connected to the terminal a, and the vertical high frequency signals VH1 and VH2 are added to the luminance signals Y1 and Y2 (or the imaging signals DG1 and DG2). Adder 1
The output signals 71, 172 are selected, and the adders 175, 1
When the moving area determination signal MVD is a logical value indicating the moving area, the changeover switches 181 and 1
82 are connected to the terminal b side, respectively, and the adder 171,
172, the vertical high frequency signal VH1,
The luminance signals Y1 and Y2 (or the imaging signals DG1 and DG2) to which the VH2 has not been added are selected and the adder 17 is selected.
5, 176.

Thus, in this embodiment, as in the embodiment of FIG. 21, the final output luminance signal output from output terminals 177 and 178 to double speed conversion circuit 115 of FIG. 12 or FIG. The luminance signal output to the circuit 82 includes a vertical high frequency signal V
H1 and VH2 can be prevented from being added, and image quality degradation can be prevented.

FIG. 23 is a block diagram showing a main part of a ninth embodiment of the image signal processing apparatus of the present invention provided with the above-mentioned luminance signal processing circuit. In the figure, the same components as those of FIG. 21 are denoted by the same reference numerals, and description thereof will be omitted. In the embodiment shown in FIG. 23, a multiplier 185 for multiplying a field pulse input via an input terminal 169 by a moving region discrimination signal MVD input via an input terminal 170 is provided. It is characterized in that the changeover switches 186 and 187 are controlled by an output signal. The changeover switches 186 and 187 are changeover switches 175 and 17
6 is a switch.

In this embodiment, a signal in which a moving area discrimination signal is superimposed on a field pulse is extracted from multiplier 185, and changeover switches 186 and 187 are controlled. That is, when the changeover switch 186 is not in the moving region, the odd-numbered field selects the output high-frequency additional signal of the adder 171 and the even-numbered field selects the input signal of the adder 171 as it is based on the field pulse. Similarly, the changeover switch 1187 selects an output high-frequency additional signal of the adder 172 in an odd field and an input signal of the adder 172 in an even field based on the field pulse.

However, in the moving range, the changeover switch 1
The switches 86 and 187 are switch-controlled so that the input signals of the adders 171 and 172 are forcibly selected regardless of the field. As a result, this embodiment is also different from FIGS.
As in the embodiment of FIG.
2 or the final output luminance signal output to the double speed conversion circuit 115 in FIG. 14, or the matrix circuit 82 in FIG.
In the moving region, the vertical high frequency signals VH1 and VH2 can be prevented from being added to the luminance signal output to the CPU, and image quality degradation can be prevented.

The present invention is not limited to the above embodiments. For example, the solid-state imaging device used is
Instead of the solid-state imaging device for the AL system, a solid-state imaging device for another standard television system such as the NTSC system can also be used.

[0125]

As described above, according to the present invention,
An imaging device and an image signal processing device having a higher resolution in the vertical direction than the resolution of the standard television system, and a first solid-state imaging device having a standard television system resolution and a green light imaging signal shared by blue light and red light. A total of two solid-state image sensors for outputting a second solid-state image sensor, or a first solid-state image sensor for blue light and red light and a standard television system resolution for green light and a standard solid-state image sensor for green light. Since the image pickup device and the image signal processing device are configured by using a total of three solid-state image pickup devices of the second and third solid-state image pickup devices, the image pickup device and the image signal processing device use four solid-state image pickup devices previously proposed by the present applicant. A simple structure and an inexpensive configuration can be obtained as compared with the apparatus.

According to the present invention, in a device using three solid-state imaging devices, a high-frequency additional signal of a green (G) signal is generated and input to the matrix means.
An image signal with a higher resolution than the resolution of the solid-state imaging device can be obtained.

The image signal processing apparatus of the present invention using three solid-state imaging devices, or the first and second resolutions of the standard television system dedicated to blue light and red light, respectively.
According to the image signal processing apparatus of the present invention having the solid-state image pickup device of the present invention and the third and fourth solid-state image pickup devices of the resolution of the standard television system for green light, the first and second image signals generated by the matrix circuit are provided. Out of the luminance signals, a first high frequency signal in the vertical direction is synthesized with the first luminance signal, and a second high frequency signal in the vertical direction is synthesized with the second luminance signal. The first and second luminance signals output from the matrix circuit having a smaller number of bits than the number of bits of the output image signal of the third solid-state image sensor are combined with the first and second high frequency signals. Therefore, the circuit configuration of the synthesizing means can be a simple configuration with a small number of input bits.

Further, according to the present invention, when it is determined as a moving area by the moving area determination signal, the first and second high frequency signals not finally synthesized with the first and second high frequency signals in the vertical direction are used. 2 to obtain a luminance signal of 2. Therefore, when applied to a moving image having different image information between fields, even if a high frequency signal in the vertical direction cannot be obtained correctly, it is possible to prevent interference and deterioration in image quality due to the signal. Can be.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a first embodiment of an imaging apparatus according to the present invention.

FIG. 2 is a diagram illustrating a pixel positional relationship between solid-state imaging devices in the imaging device in FIG. 1;

FIG. 3 is a diagram illustrating a configuration of a color filter in the imaging device in FIG. 1;

FIG. 4 is a block diagram of a first embodiment of an image signal processing device according to the present invention using the imaging device of FIG. 1;

FIG. 5 is a block diagram of a second embodiment of the image signal processing device according to the present invention using the imaging device of FIG. 1;

FIG. 6 is a configuration diagram of a second embodiment of the imaging apparatus according to the present invention.

FIG. 7 is a diagram illustrating a pixel positional relationship between solid-state imaging devices in the imaging device in FIG. 6;

8 is a diagram illustrating pixel positions on a high-definition screen of each solid-state imaging device in the imaging device of FIG. 6;

9 is a diagram showing, using symbols, one embodiment of pixel positions on a high-vision screen of each solid-state imaging device in the imaging device in FIG. 6;

FIG. 10 is a block diagram of a third embodiment of the image signal processing device according to the present invention.

FIG. 11 is a block diagram of an example of a double speed conversion circuit in FIG. 10;

FIG. 12 is a block diagram of a fourth embodiment of the image signal processing device according to the present invention.

FIG. 13 is a diagram showing, using symbols, a first embodiment of pixel positions on a high-vision screen of each solid-state imaging device in the imaging apparatus of the present invention using four solid-state imaging devices.

FIG. 14 is a block diagram of a fifth embodiment of the image signal processing device according to the present invention.

FIG. 15 is a diagram illustrating, using symbols, a second embodiment of the pixel position of each solid-state imaging device in a high-vision screen in the imaging device of the present invention using four solid-state imaging devices.

FIG. 16 is a block diagram of a sixth embodiment of the image signal processing device according to the present invention.

FIG. 17 is a block diagram of a first example of a moving area determination circuit.

FIG. 18 is a block diagram of a second example of the moving area determination circuit.

FIG. 19 is a block diagram of a third example of the moving area determination circuit.

FIG. 20 is a block diagram of a fourth example of the moving area determination circuit.

FIG. 21 is a block diagram of a main part of an image signal processing apparatus according to a seventh embodiment of the present invention.

FIG. 22 is a block diagram of a main part of an eighth embodiment of the image signal processing device according to the present invention.

FIG. 23 is a block diagram of a main part of a ninth embodiment of the image signal processing device according to the present invention.

FIG. 24 is a configuration diagram of an example of an imaging device previously proposed by the present applicant.

FIG. 25 is a diagram illustrating a pixel arrangement relationship between two green light solid-state imaging devices in FIG. 24;

26 is a diagram illustrating pixel positions on a high-vision screen of each solid-state imaging device in the imaging device in FIG. 26.

FIG. 27 is a block diagram illustrating an example of an image signal processing device previously proposed by the present applicant.

[Explanation of symbols]

41 first prism 42, 65 second prism 45 color filter 46RB solid-state image sensor for shared use of blue light and red light 46G, 69G1, 69G2 solid-state image sensor for green light 66 third prism 48, 121, 122 field memory 49, 123 Frame synthesis circuit (first synthesis means) 50 RB decomposition circuit 51, 52, 125, 126, 132, 133 Vertical high-pass filter (extraction means) 54, 55, 62, 63 Adder (second synthesis means) 56, 70, 71 Changeover switch (selection means) 57, 82 Matrix circuit (matrix means) 58, 83, 115 Double-speed conversion circuit 59, 109, 129, 134 Matrix circuit 60, 110 RY, BY decomposition circuit 78 , 111 Adder (second combining means) 79, 112 Adder (third combining means) 80, 1 3 Changeover Switch (First Selection Means) 81, 114 Changeover Switch (Second Selection Means) 124 Frame Synthesis Circuit (Second Synthesis Means) 131 Frame Synthesis Circuit (First and Second Synthesis Means) 141, 150 Delay circuit 142, 151 Adder 143, 152 Multiplier 144, 156 Field memory 145, 158 Subtractor 146, 159 Threshold circuit 147, 154, 160, 162 Dynamic region discrimination signal output terminal 155, 157 Low-pass filter (LPF) 161 Area enlargement circuit 165, 166 Luminance signal input terminal 167, 168 Vertical high frequency signal input terminal 169 Field pulse input terminal 170 Moving area discrimination signal input terminal 171, 172 Adder 173, 174 Changeover switch (first, second) 175, 176 changeover switch (first, Second selection means) 181, 182 selector switch (third and fourth selecting means) 185 multiplier (superimposing means) 186, 187 selector switch (first, second selection means)

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroyuki Kitamura 3-12-13 Moriyacho, Kanagawa-ku, Yokohama-shi, Kanagawa Japan Victor Company (56) References JP-A-6-46433 (JP, A) JP-A-Hei 6-339146 (JP, A) JP-A-8-98190 (JP, A) JP-A-8-256345 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04N 9/04 -9/11

Claims (16)

(57) [Claims] 1. An incident light comprising a first light comprising a blue light and a red light.
Color-separated light that is color-separated into second light composed of green light and second light
Science and imaging of blue light and red light when the first light is incident
A standard television for both blue and red light that outputs image signals
A first solid-state imaging device having a resolution of
Light is incident to output an image signal of green light, and
Pixel position with respect to the pixel position of the first solid-state imaging device.
For green light arranged to be shifted relatively vertically
And a second solid-state imaging device having a resolution of a standard television system
For the imaging signal output from the imaging device consisting of
What is claimed is: 1. An image signal processing apparatus for performing signal processing, comprising :
An imaging signal and a signal obtained by delaying this imaging signal by one field
Preparative a first synthesizing means for outputting a synthesized to frame synthesis signal, extraction means for extracting a high frequency signal in the vertical direction from the output frame synthesis signal of said first combining means, second of the imaging device A second synthesizing unit for synthesizing a vertical high-frequency signal from the extracting unit with the output image signal of the solid-state image sensor, and an output image signal of the second solid-state image sensor and the second synthesizing unit. Selecting means for alternately selecting the combined signal for each field, and matrix means for generating a luminance signal and a color difference signal based on the output image signal of the first solid-state image sensor and the output signal of the selecting means. An image signal processing device comprising: 2. The method according to claim 1, wherein the incident light is a first light comprising blue light and red light.
Color-separated light that is color-separated into second light composed of green light and second light
Science and imaging of blue light and red light when the first light is incident
A standard television for both blue and red light that outputs image signals
A first solid-state imaging device having a resolution of
Light is incident to output an image signal of green light, and
Pixel position with respect to the pixel position of the first solid-state imaging device.
For green light arranged to be shifted relatively vertically
And a second solid-state imaging device having a resolution of a standard television system
For the imaging signal output from the imaging device consisting of
What is claimed is: 1. An image signal processing apparatus for performing signal processing, comprising :
An imaging signal and a signal obtained by delaying this imaging signal by one field
Preparative a first synthesizing means for outputting a synthesized to frame synthesis signal, extraction means for extracting a high frequency signal in the vertical direction from the output frame synthesis signal of said first combining means, first the imaging apparatus And a matrix circuit for generating and outputting a luminance signal and a color difference signal based on both output imaging signals of the second solid-state imaging device, and a high frequency band in the vertical direction from the extraction means to the output luminance signal of the matrix circuit. A second synthesizing unit for synthesizing a frequency signal; and a selecting unit for alternately selecting an output luminance signal of the matrix circuit and a synthesized signal from the second synthesizing unit for each field. Image signal processing device. 3. The method according to claim 1, wherein the incident light is a first light comprising blue light and red light.
And the second and third lights of green light respectively
A color separation optical system for separating light, and the first light
Both blue light and red light that output color and red light imaging signals
The first solid-state image sensor with a standard television resolution
And the second light is incident thereon to produce a green light imaging signal.
Enhanced solid-state imaging with standard television resolution
An image pickup signal of green light when the third light is incident thereon;
3rd solid-state imaging with standard television resolution
And a pixel position of the first solid-state imaging device.
Relative to the pixel position of the third solid-state imaging device.
And the second fixed position.
The pixel position of the body image sensor to the pixel of the third solid-state image sensor
At least one direction, vertical and horizontal to the position
To the output image signal of the imaging device
An image signal processing device for performing signal processing, wherein the current field output from the first solid-state imaging device is
An imaging signal and a signal obtained by delaying this imaging signal by one field
Preparative a first synthesizing means for outputting a synthesized to frame synthesis signal, extraction means for extracting the first and second high-frequency signal in the vertical direction from the output frame synthesis signal of said first combining means, The output imaging signal of the second solid-state imaging device of the imaging device,
A second synthesizing unit for synthesizing a first high-frequency signal from the extracting unit, and an output imaging signal of a third solid-state imaging device of the imaging device,
A third synthesizing unit for synthesizing a second high-frequency signal from the extracting unit, an output image signal of the second solid-state imaging device and a synthesized signal from the second synthesizing unit for each field. First selecting means for alternately selecting, and second selecting means for alternately selecting the output image signal of the third solid-state image sensor and the synthesized signal from the third synthesizing unit for each field, Image signal processing comprising: matrix means for generating a luminance signal and a color difference signal based on an output image signal of the first solid-state image sensor and output signals of the first and second selection means. apparatus. 4. The method according to claim 1, wherein the incident light is a first light comprising blue light and red light.
And the second and third lights of green light respectively
A color separation optical system for separating light, and the first light
Both blue light and red light that output color and red light imaging signals
The first solid-state image sensor with a standard television resolution
And the second light is incident thereon to produce a green light imaging signal.
Enhanced solid-state imaging with standard television resolution
An image pickup signal of green light when the third light is incident thereon;
3rd solid-state imaging with standard television resolution
And a pixel position of the first solid-state imaging device.
Relative to the pixel position of the third solid-state imaging device.
And the second fixed position.
The pixel position of the body image sensor to the pixel of the third solid-state image sensor
At least one direction in the vertical and horizontal directions to the position
To the output image signal of the imaging device
An image signal processing device for performing signal processing, wherein the current field output from the first solid-state imaging device is
An imaging signal and a signal obtained by delaying this imaging signal by one field
Preparative a first synthesizing means for outputting a synthesized to frame synthesis signal, extraction means for extracting the first and second high-frequency signal in the vertical direction from the output frame synthesis signal of said first combining means, A matrix circuit for generating a color difference signal and first and second luminance signals based on imaging signals respectively taken from first to third solid-state imaging elements of the imaging device; and a first circuit output from the matrix circuit. In the luminance signal,
A second synthesizing unit for synthesizing a first high frequency signal from the extracting unit, and a second luminance signal output from the matrix circuit,
A third synthesizing unit for synthesizing a second high frequency signal from the extracting unit, and a first luminance signal output from the matrix circuit and a synthesized signal from the second synthesizing unit for each field. A second selecting means for alternately selecting a second luminance signal output from the matrix circuit and a synthesized signal from the third synthesizing means for each field. An image signal processing device comprising: 5. A moving area for generating and outputting a moving area discrimination signal based on each output image signal of the second and third solid-state imaging devices or the first and second luminance signals output from the matrix circuit. Limiting the operation of synthesizing the first high frequency signal to the first luminance signal by the discriminating circuit and the second luminance signal in the moving area discrimination based on the output moving area discriminating signal of the moving area discriminating circuit; The first restricting means and the third synthesizing means operate the synthesizing operation of the second high frequency signal with the second luminance signal based on the output dynamic area determination signal of the dynamic area determination circuit. 2. The image processing apparatus according to claim 1, further comprising a second restricting unit that restricts at the time of area determination.
5. The image signal processing device according to 4 . 6. A moving area for generating and outputting a moving area discrimination signal based on each output image signal of the second and third solid-state imaging devices or the first and second luminance signals output from the matrix circuit. A discriminating circuit, selecting one of an output synthesized signal of the second synthesizing unit and a first luminance signal output from the matrix circuit based on an output moving area discriminating signal of the moving area discriminating circuit; Third selecting means for outputting to the first selecting means as a synthesized signal from the second synthesizing means, and one of the output synthesized signal of the third synthesizing means and the second luminance signal output from the matrix circuit. And a fourth selecting means for selecting the selected signal based on the output moving area discriminating signal of the moving area discriminating circuit and outputting the selected signal to the second selecting means as a synthesized signal from the third synthesizing means. Claims 5. The image signal processing device according to 4 . 7. A moving area for generating and outputting a moving area discrimination signal based on each output image signal of the second and third solid-state imaging devices or the first and second luminance signals output from the matrix circuit. A superimposing signal is generated by superimposing a moving area discriminating signal from the moving area discriminating circuit on a discriminating circuit and a field pulse for selectively operating the first and second selecting means for each field; A superimposing means for selectively operating the first and second selecting means and forcibly selecting the first and second luminance signals output from the matrix circuit when determining a moving area is further provided. The image signal processing device according to claim 4, wherein 8. The image pickup apparatus according to claim 1, wherein the moving area discriminating circuit includes a delay unit that sets each of the output image signals of the second and third solid-state image sensors to an image signal that is different from each other by one field. Difference means for obtaining a difference value of the signal;
8. The image signal processing apparatus according to claim 5 , further comprising a threshold circuit configured to compare the output difference value of the difference unit with a threshold to generate the moving area determination signal. 9. The moving area discriminating circuit compares the first and second luminance signals output from the matrix circuit with each other.
A delay unit for imaging signals having different fields, a difference unit for obtaining a difference value between two luminance signals output from the delay unit, and comparing the output difference value of the difference unit with a threshold value to determine the moving region determination signal. The image signal processing apparatus according to claim 5 , further comprising a threshold circuit that generates the image signal. 10. The method according to claim 1, wherein the incident light is a first light comprising blue light;
A color separation optical system for performing color separation into second light composed of red light, third and fourth light composed of green light, respectively,
A first solid-state image sensor for blue light, which outputs an image signal of blue light upon incidence of light, and a second solid light, and outputs an image signal of red light upon incidence of the second light. A second solid-state imaging device for red light and resolution of standard television system; and a third solid-state imaging device for green light for receiving the third light and outputting a green light imaging signal. A solid-state imaging device, the fourth light being incident thereon, outputting a green light imaging signal, and a pixel position of which is vertically shifted relative to a pixel position of the first and second solid-state imaging devices. A fourth standard television standard resolution for green light, which is arranged so as to be shifted and is shifted so as to be shifted at least in one direction in the vertical direction and the horizontal direction with respect to the pixel position of the third solid-state imaging device. Taking and a solid-state imaging device The output image signal of the apparatus, the signal
An image signal processing device for performing processing, wherein current signals separately output from the first and second solid-state imaging devices are output.
The field imaging signal and this imaging signal are separately
To the frame-delayed signal.
First outputting each Te, a second combining means, said first extraction means from the output frame synthesis signal of the second combining means for extracting the first and second high-frequency signal in the vertical direction, the A matrix circuit that generates a color difference signal and first and second luminance signals based on imaging signals respectively extracted from the first to fourth solid-state imaging elements; and a first luminance signal output from the matrix circuit.
A third synthesizing unit for synthesizing a first high frequency signal from the extracting unit, and a second luminance signal output from the matrix circuit,
A fourth synthesizing unit for synthesizing the second high frequency signal from the extracting unit, and a first luminance signal output from the matrix circuit and a synthesized signal from the third synthesizing unit for each field. First selecting means for alternately selecting the second luminance signal output from the matrix circuit and the synthesized signal from the fourth synthesizing means alternately for each field. An image signal processing device comprising: 11. The first and second solid-state imaging devices are arranged such that pixel positions of the first and second solid-state imaging devices are vertically shifted from each other by one pixel pitch in a vertical direction. 11. The image signal processing apparatus according to claim 10, wherein the synthesizing means is configured to synthesize the output image signals of the first and second solid-state image sensors using the same synthesizing circuit. 12. A moving area for generating and outputting a moving area discrimination signal based on each output luminance signal of the third and fourth solid-state imaging devices or the first and second luminance signals output from the matrix circuit. Limiting the operation of synthesizing the first high frequency signal to the first luminance signal by the judgment circuit and the third synthesizing means at the time of moving area judgment based on the output moving area judgment signal of the moving area judgment circuit; A first restricting means,
A second operation for restricting the operation of synthesizing the second high frequency signal to the second luminance signal by the fourth synthesizing means at the time of moving area discrimination based on the output moving area discriminating signal of the moving area discriminating circuit. 11. The image signal processing device according to claim 10 , further comprising a limiting unit. 13. A moving area for generating and outputting a moving area discrimination signal based on each output luminance signal of the third and fourth solid-state imaging devices or the first and second luminance signals output from the matrix circuit. A discrimination circuit, a combined signal output from the third combining means, and a first combined signal output from the matrix circuit.
A third selecting means for selecting one of the luminance signals based on the output moving area discriminating signal of the moving area discriminating circuit and outputting to the first selecting means as a synthesized signal from the third synthesizing means; And selecting one of the output synthesized signal of the fourth synthesizing means and the second luminance signal output from the matrix circuit based on the output moving area discriminating signal of the moving area discriminating circuit. From the second signal
11. The image signal processing apparatus according to claim 10 , further comprising: a fourth selecting unit that outputs the selected signal to the selecting unit. 14. A moving area for generating and outputting a moving area discrimination signal based on each output luminance signal of the third and fourth solid-state imaging devices or the first and second luminance signals output from the matrix circuit. A superimposing signal is generated by superimposing a moving area discriminating signal from the moving area discriminating circuit on a discriminating circuit and a field pulse for selectively operating the first and second selecting means for each field; The first
And the second selection means are selectively operated, and when the moving area is determined, the first signal output from the matrix circuit is forcibly output.
11. The image signal processing apparatus according to claim 10 , further comprising a superimposing means for selecting a second luminance signal. 15. The moving area discriminating circuit includes: a delay unit that converts each output image signal of the third and fourth solid-state image sensors into an image signal that is different from each other by one field; and two image signals output from the delay unit. 15. The apparatus according to claim 12 , further comprising: a difference unit that obtains a signal difference value; and a threshold circuit that compares the output difference value of the difference unit with a threshold to generate the moving region determination signal. The image signal processing device according to claim 1. 16. The moving area discriminating circuit includes delay means for converting the first and second luminance signals output from the matrix circuit into image pickup signals different from each other by one field, and two luminance signals output from the delay means. 15. The apparatus according to claim 12 , further comprising: a difference unit that obtains a signal difference value; and a threshold circuit that compares the output difference value of the difference unit with a threshold to generate the moving region determination signal. The image signal processing device according to claim 1.