JPH04363985A - Video camera - Google Patents

Abstract

PURPOSE:To recognize a picture border of a photo camera accurately even when a zoom magnification is changed. CONSTITUTION:A video camera section and a photo camera section are arranged integrally in a cabinet. A zoom lens is employed for an image pickup lens 2 of the video camera and for an image pickup lens 3 of a photo camera. Variable resistors 44, 48 are arranged to the image pickup lenses 2, 3 to apply detection signals SDv SDp to a controller 27. The picture border ratio of the image pickup pattern and the photo camera pattern differs from the zoom magnification. A picture frame data Dm displaying a picture frame of the photo camera is outputted from the controller 27 depending on the picture border ratio. An image pickup pattern of a prescribed size and a picture frame of the photo camera are displayed on the screen of the electronic view finder EVF 30. Even when the zoom magnification is changed, the picture border of the photo camera is accurately recognized and the user surely implements the shutter operation and the zoom operation of the photo camera while observing the display pattern of the EVF.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video camera having a zoom function and an electronic viewfinder.

0002

2. Description of the Related Art By using a video camera, it is possible to capture not only moving images but also still images. However, the resolution of a video camera is lower than that of a photo camera (film camera), and it is often desired to use a photo camera together with a video camera. For example, it is conceivable to fix a photo camera to a video camera and operate the shutter of the photo camera while capturing a moving image with the video camera.

[0003] In this case, if the image frame of the photo camera is displayed on the electronic viewfinder of the video camera, the user can recognize the image area of the photo camera using the electronic viewfinder, and can perform shutter and zoom operations accurately. be able to.

0004

By the way, in a video camera having a zoom function, when the zoom magnification changes, the angle of view of the image capturing screen changes. This also applies to photo cameras that have a zoom function. Therefore, as the zoom magnification of the video camera or photo camera changes, the positional relationship between the imaging screen and the image frame of the photo camera changes.

[0005] Accordingly, the present invention is intended to enable accurate recognition of the field of view of a photo camera even when the zoom magnification changes.

[0006]

[Means for Solving the Problems] The present invention provides an image frame signal generating means for generating an image frame signal for displaying an image frame of a photo camera having a zoom function in a video camera having a zoom function and equipped with an electronic viewfinder. and an image frame position changing means for changing the image frame position of the photo camera according to a change in the angle of view due to a change in zoom magnification, and a signal synthesizing means for synthesizing the captured video signal and the image frame signal, and an electronic viewfinder. The image capturing screen is fixedly displayed on the screen, and the image frame of the photo camera is displayed using this image capturing screen as a reference.

[0007]

[Operation] When the zoom magnification of a video camera becomes low or high, its angle of view becomes large or small, and the picture frame of a photo camera becomes small or large. On the other hand, as the zoom magnification of the photo camera becomes lower or higher, its angle of view becomes larger or smaller, and the image frame of the photo camera becomes larger or smaller. In other words, the image frame of the photo camera changes in accordance with changes in zoom magnification.

According to the above configuration, the image frame of the photo camera is displayed on the electronic viewfinder based on the imaging screen of a fixed size, so the image frame of the photo camera can be accurately recognized, and the user can use the electronic viewfinder as a reference. The shutter and zoom operations of the photo camera can be accurately performed while looking at the display screen.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In this example, a video camera and a photo camera are integrally formed.

FIG. 1 is a perspective view showing the overall configuration. In the figure, 1 is a cabinet. Although not shown, the cabinet 1 includes a video camera section including an image sensor, a signal processing circuit, etc., and a photo camera section including a film loading mechanism, a film drive mechanism, etc.

2 is an imaging lens of the video camera section;
3 is an imaging lens of the photo camera section. That is, the optical systems of the video camera section and the photo camera section are configured separately. As the imaging lens 2, the focal length f is 7 mm to 42 m.
A 6x zoom lens of m is used. On the other hand, as the imaging lens 3, a 3x zoom lens with a focal length f of 35 mm to 105 mm is used.

Further, in this example, an electronic viewfinder made of a small CRT is provided in the cabinet 1.
A screen imaged by a video camera unit via an imaging lens 2 is displayed on RT. 4 is an eye cup. In addition,
A finder for directly checking the screen imaged by the photo camera section through the imaging lens 3 is not provided.

Further, 5T and 5W are zoom operation buttons for zooming in the TELE direction and WIDE direction, respectively. Reference numeral 6 indicates a recording button for recording an imaged video signal outputted from the video camera section onto a VTR, and 7 indicates a shutter button of the photo camera section. Furthermore, 8 is a film rewind operation button.

FIG. 2 shows the configuration of the video camera section. Image light from a subject is supplied via an imaging lens 2 and an iris 11 to a single-chip CCD solid-state image sensor 12 having a complementary color checkerboard color filter.

FIG. 3 is a schematic color coding diagram of this image sensor 12. As shown in the figure, field reading is performed. In the A field, charges are mixed in pairs such as A1 and A2, and in the B field, charges are mixed in pairs such as B1 and B.
Charges are mixed in pairs such as 2. Then, from the horizontal shift register Hreg, in the A field, A1, A2
,... In the B field, B1, B2,...
Charges are output in this order.

Here, the order of charges a, b, . . . is (Cy+G) on line A1, as shown in FIG.
, (Ye+Mg),..., and on the A2 line, (Cy+Mg), (Ye+G),..., and B
In one line, (G+Cy), (Mg+Ye),
..., and in the B2 line, (Mg+Cy)
, (G+Ye), .

The charges output from the image sensor 12 as described above are supplied to a CDS circuit (correlated double sampling circuit) 13, and taken out from the CDS circuit 13 as an image signal. By using this CDS circuit 13,
As is well known, reset noise can be reduced.

Timing pulses necessary for the image sensor 12 and the CDS circuit 13 are supplied from a timing generator 14. The timing generator 14 has 8 signals from the oscillator 15.
Reference clock C of fsc (fsc is color subcarrier frequency)
K0 is supplied, and horizontal and vertical synchronization signals HD and VD are supplied from the synchronization generator 16. On the other hand, the synchronous generator 16 is supplied with a 4 fsc clock CK1 from the timing generator 14.

The imaging signal output from the CDS circuit 13 is supplied to a level detection circuit 17, and the output signal of this detection circuit 17 is supplied to an iris driver 18. and,
The aperture of the iris 11 is automatically controlled by the iris driver 18.

Here, processing for obtaining a luminance signal Y and a chroma signal (color difference signal) from the image pickup signal output from the CDS circuit 13 will be explained.

The luminance signal Y is obtained by adding adjacent signals together. In FIG. 4, a+b, b+
Addition signals c, c+d, d+e, . . . are formed in order.

For example, the A1 line is approximated by the following equation. Here, Cy=B+G, Ye=R+G, Mg
=B+R.

Y={(Cy+G)+(Ye+Mg))}×1/2=(
2B+3G+2R)×1/2 Furthermore, on the A2 line, it is approximated by the following equation.

Y={(Cy+Mg)+(Ye+G))}×1/2=(
2B+3G+2R)×1/2 The other lines of the A field and the lines of the B field are similarly approximated.

The chroma signal is obtained by subtracting adjacent signals.

For example, the A1 line is approximated by the following equation.

[0027] RY=(Ye+Mg)-(Cy+G)=(2R-G) Further, on the A2 line, it is approximated as shown in the following equation.

−(B−Y)=(Ye+G)−(Cy−Mg)=−(2
B-G) Regarding the other lines of the A field and the lines of the B field, the red difference signal RY and the blue difference signal -(B-Y) are obtained alternately line-sequentially in the same way.

Returning to FIG. 2, the image signal output from the CDS circuit 13 is supplied via the AGC circuit 19 to a low-pass filter 20 constituting a brightness processing section. The low-pass filter 20 performs addition processing (averaging) of adjacent signals. Therefore, this low-pass filter 20
A luminance signal Y is outputted from.

Further, the image signal outputted from the AGC circuit 19 is supplied to sample and hold circuits 21 and 22 forming a chroma processing section. sample hold circuit 21,
22 are supplied with sampling pulses SHP1 and SHP2 (shown in E and F in FIGS. 5 and 6) from the timing generator 14.

From the sample hold circuit 21, (Cy
+G) or (Cy+Mg) continuous signal S1 is output and supplied to the subtracter 23 (as shown in FIGS. 5B and 6B). From the sample hold circuit 22, (Ye+Mg)
Alternatively, a continuous signal S2 of (Ye+G) is output and supplied to the subtracter 23 (as shown in FIGS. 5C and 6C).

The subtracter 23 subtracts the signal S1 from the signal S2. Therefore, the subtracter 23 outputs a red difference signal R-Y and a blue difference signal -(B-Y) alternately in a line-sequential manner (as shown in FIGS. 5D and 6D).

The color difference signal output from the subtracter 23 is directly supplied to the fixed terminal on the b side of the changeover switch 24 and the fixed terminal on the a side of the changeover switch 25, and is also supplied to a delay circuit having a delay time of one horizontal period. The signal is supplied to the a-side fixed terminal of the change-over switch 24 and the b-side fixed terminal of the change-over switch 25 via the changeover switch 26 .

Switching of the changeover switches 24 and 25 is controlled by a controller 27. That is, one horizontal period during which the red difference signal RY is output from the subtracter 23 is b.
On the other hand, one horizontal period during which the blue color difference signal -(B-Y) is output is connected to the a side. Note that the controller 27 is supplied with the synchronization signals HD and VD from the synchronization generator 16 as reference synchronization signals, and is also supplied with the clock CK1 from the timing generator 14.

Since the changeover switches 24 and 25 are changed over as described above, the changeover switch 24 outputs the red difference signal RY in each horizontal period, and the changeover switch 25 outputs the blue difference signal -( B-Y) is output.

The luminance signal Y output from the low-pass filter 20 and the color difference signals (RY) and -(B-Y) output from the changeover switches 24 and 25 are supplied to an encoder 28. The encoder 28 is supplied with a composite synchronization signal SYNC, a blanking signal BLK, a burst flag signal BF, and a color subcarrier signal SC from the synchronization generator 16.

In the encoder 28, as is well known, a synchronizing signal SYNC is added to the luminance signal Y, and a color difference signal is subjected to quadrature two-phase modulation to form a carrier color signal C, and a color burst signal is added. . and,
These luminance signal Y and carrier color signal C are added to form, for example, an NTSC color video signal. The color video signal SCV output from the encoder 28 in this manner is led to the output terminal 29.

Furthermore, the encoder 28 outputs a black-and-white video signal SV (luminance signal Y to which a synchronizing signal SYNC has been added), and this black-and-white video signal SV is supplied to the electronic viewfinder 30 via an adder 31. Then, the image capture screen is displayed on the small CRT constituting the electronic viewfinder 30.

Further, the zoom magnification of the imaging lens 2 is adjusted by a zoom driver 41. FIG. 7 shows a specific configuration of the zoom driver 41. In the figure, 411 is a lens constituting the imaging lens 2,
This is for adjusting the zoom magnification. This lens 4
The zoom magnification is adjusted by moving the position 11 back and forth with a rotational drive. For example, rotating it toward the T side adjusts it in the TELE direction, while rotating it toward the W side adjusts it in the WIDE direction.

This lens 411 is rotationally driven by a DC motor 412. One end and the other end of this motor 412 are connected to output terminals q1 and q2 of a zoom driver section 413, respectively. Input terminals p1 and p2 of the zoom driver section 413 are connected to changeover switches 45 and 4, respectively.
It is connected to fixed terminals on the T side and W side of the zoom operation switch 42 via the V side of the zoom operation switch 42 .

The switching of the changeover switches 45 and 46 is carried out by a zoom operation selection button (not shown in FIG. 1) arranged on the cabinet 1. For example, when the zoom operation selection button is not pressed, it is connected to the v side, On the other hand, when pressed, it is connected to the p side.

When a high level "H" signal is supplied to the terminal p1 of the zoom driver section 413, current flows to the motor 412 in the direction from the terminal q1 to the terminal q2 (as shown by the solid line), and the lens 411 moves in the T direction. Rotationally driven. Conversely, when a high level "H" signal is supplied to the terminal p2, the motor 41 moves in the direction from the terminal q2 to the terminal q1.
A current flows through the lens 411 (indicated by a broken line), and the lens 411 is driven to rotate in the W direction. Note that when a high level "H" signal is not supplied to either terminal p1 or p2, the motor 4
No current flows through lens 412, lens 411 is not rotationally driven in any direction, and its position is maintained.

A movable terminal of the zoom operation switch 42 is connected to a power supply terminal. Cabinet 1 operation buttons 5T, 5W
When pressing , the zoom operation switch 42 is
side, W side. When the operation buttons 5T and 5W are pressed without pressing the zoom operation selection button, a high level "H" is applied to the terminals p1 and p2 of the zoom driver section 413, respectively.
" signal is supplied, and zoom adjustment is performed in the TELE direction and WIDE direction.

Further, as shown in FIG. 2, a variable resistor 44 constituting a potentiometer is arranged at the mounting position of the lens 411 of the imaging lens 2. The movable element position of the variable resistor 44 is configured to be shifted by rotation of the lens 411, and a voltage corresponding to the zoom magnification is obtained at the movable element, and this is supplied to the controller 27 as a detection signal SDv. As shown in FIG. 8, the detection signal SDv is set to, for example, 1V at the WIDE end (f=7 mm) and 4V at the TELE end (f=42 mm).

Further, the zoom magnification of the imaging lens 3 is adjusted by a zoom driver 47. FIG. 9 shows a specific configuration of the zoom driver 47. Since this zoom driver 47 has the same configuration as the zoom driver 41 described above, corresponding parts are given the same reference numerals and detailed explanation will be omitted.

Zoom driver section 4 of zoom driver 47
13 input terminals p1 and p2 are respectively connected to the changeover switch 4.
It is connected to fixed terminals on the T side and W side of the zoom operation switch 42 via the p side of the zoom operation switch 42 .

When the operation buttons 5T and 5W of the cabinet 1 are pressed, the zoom operation switch 42 is moved to the T side and the W side, respectively.
connected to the side. When the operation buttons 5T and 5W are pressed while the zoom operation selection button is pressed, a high level "H" signal is supplied to the terminals p1 and p2 of the zoom driver section 413, respectively, and the zoom adjustment is performed in the TELE direction and the WIDE direction. It is done.

Further, as shown in FIG. 2, a variable resistor 48 constituting a potentiometer is arranged at the mounting position of the lens 411 of the imaging lens 3. The position of the movable element of the variable resistor 48 is configured to be shifted by rotation of the lens 411, and a voltage corresponding to the zoom magnification is obtained at the movable element, and this is supplied to the controller 27 as a detection signal SDp. As shown in FIG. 10, the detection signal SDp is, for example, 1V at the WIDE end (f=35mm), and the TEL
The voltage is set to 4V at the E end (f=105mm).

In this example, the image capture screen is fixedly displayed on the small CRT screen of the electronic viewfinder 30, and the image frame of the photo camera is also displayed. The angle of view of the video camera and photo camera changes depending on the zoom magnification, and therefore the field of view changes. In order to display the image frame of a photo camera on the screen of a small CRT, it is necessary to find the ratio between the image area of the image capturing screen and the image area of the photo camera.

The angle of view will now be explained using FIG. 11. The angle of view θ is the imaging surface size T and the f value (focal length)
From this, it can be obtained as shown in Equation 1. Note that in FIG. 11, T' is the field of view, and L is the object distance.

[0051]

[Equation 1] θ=2tan-1T/2f The imaging lens 2 is a 6x zoom lens with f=7 mm to 42 mm. When the image sensor 12 is 1/3 inch, the horizontal size ZH of the imaging surface is 4.9 mm, the vertical size ZV is 3.69 mm, and the diagonal size ZD is 6.
．． It is 13 mm (see Figure 12).

Therefore, the horizontal and vertical angles of view θZH and θZV at the WIDE end (f=7 mm) are 38.6° and 29.5°, respectively. On the other hand, the horizontal and vertical viewing angle θ at the TELE end (f = 42 mm)
ZH and θZV are 6.7° and 5.0°, respectively.

Furthermore, the imaging lens 3 has f=35 mm to 10
It is a 5mm 3x zoom lens. The film is 35mm
, the horizontal size PH of the imaging surface is 36
mm, the vertical size PV is 24 mm, and the diagonal size PD is 43.3 mm (see FIG. 13).

Therefore, the horizontal and vertical angles of view θPH and θPV at the WIDE end (f=35 mm) are 54.4° and 37.8°, respectively. On the other hand, TELE
The horizontal and vertical viewing angles θPH and θPV at the end (f = 105 mm) are 19.5° and 13.0°, respectively.
becomes.

From the above, the relationship between the angles of view of the imaging lens 2, which is a zoom lens, and the imaging lens 3, which is a zoom lens, is as shown in Table 1.

[0056]

[Table 1]

Next, the field of view ratio between the imaging screen and the photo camera will be explained. From FIG. 11, the field of view T' can be determined as shown in Equation 2.

[0058]

[Equation 2] T'=2Ltan θ/2 If the object distance L between the imaging lens 2 of the video camera section and the imaging lens 3 of the photo camera section is equal, it can be seen that the field of view ratio changes depending on the angle of view θ.

Here, since the horizontal and vertical field angles θZH and θZV of the imaging screen are shown in Table 1, the horizontal and vertical field of view T'ZH and T'ZV at the WIDE end are
are 0.7L and 0.53L respectively, while TELE
Horizontal and vertical field of view at the edge T'ZH, T'Z
V becomes 0.12L and 0.09L, respectively.

The viewing angles θZH and θZV of the imaging screen other than the WIDE end and the TELE end are calculated based on the detection signal SDv using the formula 3.
It can be obtained as shown below.

[0061]

[Math. 3] θZH=38.6°-(38.6°-6.7°)(
SDv-1)/3 θZV=29.5°-(29.5
°-5.0°)(SDv-1)/3 By substituting the angles of view θZH and θZV obtained from equation 3 into θ of equation 2, the fields of view T'ZH and T'ZV can be obtained. Can be done.

Furthermore, since the horizontal and vertical viewing angles θPH and θPV of the photo camera are shown in Table 1, WIDE
Horizontal and vertical picture fields T'PH, T'P at the edges
V is 1.03L and 0.69L, respectively, while TE
Horizontal and vertical field of view T′PH,T at the LE end
'PV is 0.34L and 0.23L, respectively.

The viewing angles θPH and θPV of the imaging screen other than the WIDE end and the TELE end are calculated based on the detection signal SDp using the formula 4.
It can be obtained as shown below.

[0064]

[Equation 4] θPH=54.4°-(54.4°-19.5°)
(SDp-1)/3 θPV=37.8°-(37.
8°-13.0°) (SDp-1)/3 By substituting the angles of view θPH and θPV found by this equation 4 into θ in equation 2, find the fields of view T'PH and T'PV. be able to.

From the above, the relationship between the field of view of the imaging screen and the field of view of the photo camera is as shown in Table 2. FIG. 14 shows the field relationship in the horizontal direction, and FIG. 15 shows the field relationship in the vertical direction.

[0066]

[Table 2]

[0067] Also, the field of view ratio T'P in the horizontal and vertical directions
H/T'ZH and T'PV/T'ZV are as shown in Table 3.

[0068]

[Table 3]

Note that the image field T' can also be obtained from FIG. 11 as shown in Equation 5.

[0070]

[Equation 5] T'=L×T/f The focal length f of the imaging lens 2 can be determined as shown in Equation 6 based on the detection signal SDv.

[0071]

[Math. 6] f=7mm+(42mm-7mm)(SDv-1)/3
By substituting the focal length f obtained from Equation 6 into Equation 5, and further substituting the horizontal size ZH and vertical size ZV of the imaging surface for T in Equation 5, the horizontal and vertical field of view T can be obtained, respectively. 'ZH, T'ZV can be obtained.

Further, the focal length f of the imaging lens 3 can be determined as shown in Equation 7 based on the detection signal SDp.

[0073]

[Math. 7] f=35mm+(105mm-35mm)(SDp-1
)/3 By substituting the focal length f obtained by this equation 7 into equation 5, and further substituting the horizontal size PH and vertical size PV of the imaging plane for T in equation 5, the horizontal direction,
The vertical field of view T'PH and T'PV can be determined.

Returning to FIG. 2, the controller 27 adjusts the field of view ratios T'PH/T'ZH, T'P in the horizontal and vertical directions.
Image frame data Dm for displaying the image frame of the photo camera at a screen position corresponding to V/T'ZV is formed.

FIG. 16 is a flowchart showing the process of outputting image frame data in the controller 27. first,
The focal length f of the imaging lens 2 is calculated from the detection signal SDv using Equation 6 (step 51).

Next, by substituting this focal length f into Equation 5, and substituting the horizontal size ZH and vertical size ZV of the imaging plane into T in Equation 5, the horizontal and vertical images of the video camera can be determined. The fields T'ZH and T'ZV are calculated (step 52).

Next, the focal length f of the imaging lens 3 is calculated from the detection signal SDp using Equation 7 (step 53).
.

Next, by substituting this focal length f into Equation 5, and substituting the horizontal size PH and vertical size PV of the imaging surface into T in Equation 5, the horizontal and vertical images of the photo camera can be calculated. The fields T'PH and T'PV are calculated (step 54).

Next, this image field T'ZH, T'ZV, T'
Using PH, T'PV, horizontal and vertical field of view ratios of the imaging screen and photo camera T'PH/T'ZH, T'
PV/T'ZV is calculated (step 55).

[0080] Then, this field ratio T'PH/T'ZH,
Image frame data Dm is output in accordance with T'PV/T'ZV (step 56). The picture frame data Dm is, for example, data indicating the horizontal and vertical positions at which the picture frame signal is displayed. In this case, the horizontal and vertical sizes of the image frame are determined by the field of view ratio T'PH/T'ZH, T'
The picture frame data Dm is formed to be approximately equal to the size indicated by PV/T'ZV. Here, the size in the horizontal direction is adjusted in units of pixel pitch, and the size in the vertical direction is adjusted in units of line pitch.

Returning to FIG. 2, the image frame data Dm output from the controller 27 is supplied to the frame signal generation circuit 32. This frame signal generation circuit 32 is supplied with the synchronization signals HD and VD from the synchronization generator 16, and is also supplied with the clock CK1 from the timing generator 14. The frame signal generation circuit 32 outputs, for example, a white peak level signal at the horizontal and vertical positions indicated by the image frame data Dm, and this is supplied to the adder 31 as a frame signal Sm.
It is added to the black and white video signal SV.

As a result, the image frame of the photo camera is displayed on the small CRT screen of the electronic viewfinder 30 together with the image pickup screen as shown in FIG. In this case, the image capture screen is displayed at a constant size, but the image frame of the photo camera is displayed at a position according to the zoom magnification.

[0083] Although not mentioned above, the size of the imaging screen is TELE
It is reduced in size in advance to the extent that the image frame of the photo camera at the edge can be displayed, and is displayed in the center of the screen of the small CRT. Although not mentioned above, time axis compression processing for screen reduction is performed by the encoder 28, for example.

As described above, in this example, the image frame of the photo camera is displayed on the small CRT screen of the electronic viewfinder 30 based on the imaging screen of a fixed size, so that the zoom magnification of the video camera or photo camera is Even if the field of view changes, the field of view of the photo camera can be accurately recognized. Therefore, the shutter operation and zoom operation of the photo camera can be performed accurately while looking at the display screen of the electronic viewfinder 30.

[0085] In the above embodiment, the video camera and photo camera are integrated, but the present invention is also applicable to a type in which a separate photo camera is fixed to the video camera. be able to. in this case,
For example, a means is provided for inputting data on the field of view T'PH, T'PV of a photo camera (data on angles of view θPH, θPV, or data on focal length f and imaging surface size PH, PV of the film) to the controller 27. By that,
It can be used with any type of photo camera.

Furthermore, in the above-described embodiment, the zoom operation buttons 5T and 5W (zoom operation switch 42) are commonly used for zoom operation of the imaging lenses 2 and 3, but it is also possible to provide dedicated operation buttons for each. good.

[0087]

According to the present invention, the image frame of the photo camera is displayed on the electronic viewfinder based on the imaging screen of a fixed size, so even if the zoom magnification changes, the image frame of the photo camera can be accurately displayed. The user can accurately operate the shutter and zoom of the photo camera while looking at the display screen of the electronic viewfinder.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the appearance of an embodiment.

FIG. 2 is a diagram showing the configuration of a video camera section.

FIG. 3 is a schematic diagram of color coding.

FIG. 4 is a diagram showing the output of a horizontal output register.

FIG. 5 is a diagram for explaining color signal processing.

FIG. 6 is a diagram for explaining color signal processing.

FIG. 7 is a diagram showing the configuration of a zoom driver of the video camera section.

FIG. 8 is a diagram showing the relationship between the zoom angle of view of the video camera section and the detection signal.

FIG. 9 is a diagram showing the configuration of a zoom driver of the photo camera section.

FIG. 10 is a diagram showing the relationship between the zoom angle of view of the photo camera section and the detection signal.

FIG. 11 is a diagram for explaining how to obtain the angle of view.

FIG. 12 is a diagram showing the size of the imaging surface of a 1/3-inch CCD solid-state imaging device.

FIG. 13 is a diagram showing the size of the imaging surface of a 35 mm film.

[Figure 14] Field of view of imaging screen and photo camera (horizontal direction)
FIG.

[Figure 15] Field of view of imaging screen and photo camera (vertical direction)
FIG.

FIG. 16 is a flowchart showing an operation for outputting image frame data.

FIG. 17 is a diagram showing a display screen of an electronic viewfinder.

[Explanation of symbols]

1 Cabinet 2, 3 Imaging lens 4 Eye cup 5T, 5W Zoom operation button 6 Record button 7 Shutter button 12 CCD solid-state image sensor 14 Timing generator 16 Synchronous generator 20 Low pass filter 21, 22 Sample and hold circuit 23 Subtractor 24, 25 Selector switch 26 Delay circuit 27 Controller 28 Encoder 29 Output terminal 30 Electronic viewfinder 31 Adder 32 Frame signal generation circuit 41, 47 Zoom driver 42 Zoom operation switch 44, 48 Variable resistor

Claims (1)

[Claims] 1. A video camera having a zoom function and an electronic viewfinder, comprising: an image frame signal generating means for generating an image frame signal for displaying an image frame of a photo camera having a zoom function; An image frame position changing means for changing the image frame position of the photo camera according to a change in the angle of view, and a signal synthesizing means for synthesizing the captured video signal and the image frame signal are provided, and the image is captured on the screen of the electronic viewfinder. A video camera characterized in that a screen is fixedly displayed and an image frame of the photo camera is displayed based on this imaging screen.