JPH0575902A - Video camera - Google Patents

Abstract

PURPOSE:To record a display signal indicating the execution of image pickup by a photo-camera together with an image pickup signal. CONSTITUTION:A video signal SCV outputted from an encoder 28 is outputted through a character generator 31. When a shutter switch 33 is turned on in the ON state of a display setting switch 35, the generator 31 is driven under the control of a controller 27 and a display signal indicating the execution of image pickup by a photo-camera part 100 is synthesized and outputted to a part in the video signal SCV which corresponds to an image picked up by the photo-camera part 100. The display signal displays the count value (the number of picked-up images) of a counter 34, a date, other marks, and so on. What is to be displayed is determined by operating a keyboard 36. Since the display signal indicating the execution of image pickup by the photo-camera part 100 can be recorded in a VTR together with the video signal SCV, the existence of a photograph can easily be checked at the time of reproducing a tape and the using procedure of this video camera can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video camera.

[0002]

2. Description of the Related Art By using a video camera, it is possible to capture still images as well as moving images. However, the resolution of the video camera is lower than that of the photo camera,
Often they want to use a photo camera at the same time as a video camera. For example, it is conceivable to fix the photo camera to the video camera and operate the shutter of the photo camera while capturing a moving image with the video camera.

[0003]

By the way, an image pickup signal from a video camera can be recorded by a VTR.
If a display signal indicating that the image was picked up by a photo camera can be recorded at the same time, the presence or absence of a photograph can be easily confirmed when the tape is reproduced, which is very convenient.

In view of this, the present invention enables recording of a display signal indicating that an image has been picked up by a photo camera together with the image pickup signal.

[0005]

According to the present invention, there is provided display signal generating means for generating a display signal indicating that an image has been taken in association with shutter operation of a photo camera, and shutter operation of an image signal output from an image sensor. A signal synthesizing means for synthesizing the display signal output from the display signal generating means is provided in a portion corresponding to the screen imaged by the photo camera.

[0006]

In the above-mentioned structure, the display signal indicating that the image is picked up by the photo camera can be combined and output to the part of the image pickup signal corresponding to the screen imaged by the photo camera. Thereby, for example, it becomes possible to record the display signal indicating that the image is picked up by the photo camera together with the image pickup signal in the VTR.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing the overall structure. In the figure, 1 is a cabinet. Although not shown, a video camera unit including an image pickup device, a signal processing circuit, and the like, and a photo camera unit including a film loading mechanism, a film driving mechanism, and the like are built in the cabinet 1.

Reference numeral 2 denotes an image pickup lens of the video camera section,
Reference numeral 3 is an imaging lens of the photo camera unit. That is, the optical system of the video camera unit and the optical system of the photo camera unit are configured separately. The imaging lens 2 has a focal length f of 7 mm to 42 m.
A 6x zoom lens of m is used. On the other hand, as the image pickup lens 3, a fixed focus lens having a focal length f of 55 mm is used.

Further, in this example, an electronic viewfinder including a small CRT is provided in the cabinet 1.
A screen imaged by the video camera unit is displayed on the RT via the imaging lens 2. 4 is an eyecup. In addition,
No finder is provided for directly checking the screen imaged by the photo camera unit via the imaging lens 3.

Further, 5T and 5W are zoom operation buttons for performing zoom operations in the TELE direction and the WIDE direction, respectively. Reference numeral 6 denotes a record button for recording an image pickup video signal output from the video camera unit on the VTR. Reference numeral 7 is a shutter button of the photo camera unit, and 8 is a film rewind operation button.

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

The zoom magnification of the image pickup lens 2 is adjusted by the zoom driver 41. FIG. 7 shows a specific configuration of the zoom driver 41. In the figure,
Reference numeral 411 denotes a lens which constitutes the imaging lens 2, and is for adjusting the zoom magnification. By moving the position of this lens 411 back and forth by rotational drive,
Zoom magnification is adjusted. For example, rotation to the T side adjusts in the TELE direction, while rotation to the W side adjusts in the WIDE direction.

The DC motor 412 drives the lens 411 to rotate. One end and the other end of the motor 412 are connected to the output terminals q1 and q2 of the zoom driver unit 413, respectively. The input terminals p1 and p2 of the zoom driver unit 413 are respectively connected to the zoom operation switch 4
2 is connected to the T-side and W-side fixed terminals.

In this case, when a high level "H" signal is supplied to the terminal p1, current flows through the motor 412 in the direction from the terminal q1 to the terminal q2 (shown by the solid line), and the lens 411 rotates in the T direction. Driven. Conversely, when a high level “H” signal is supplied to the terminal p2, the terminal q2
Current flows from the terminal q1 to the motor 412 in the direction of the terminal q1 (shown by a broken line), and the lens 411 is rotationally driven in the W direction. When a high level “H” signal is not supplied to any of the terminals p1 and p2, no current flows in the motor 412, the lens 411 is not rotationally driven in either direction, and its position is maintained. To be done.

The movable terminal of the zoom operation switch 42 is connected to the power supply terminal. Cabinet operation button 5 mentioned above
When pressing T or 5W, the zoom operation switch 42 is connected to the T side and the W side, respectively. Zoom operation switch 4
When 2 is connected to the T side and the W side, a high level “H” signal is supplied to the terminals p1 and p2 of the zoom driver unit 413, respectively, and zoom adjustment is performed in the TELE direction and the WIDE direction.

FIG. 3 is a schematic diagram of color coding of the image pickup device 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 B2. Then, from the horizontal shift register Hreg, A1, A2, ...
.. in the order of B, B1, B2, ...

Here, the order of charges a, b, ... Is (Cy +) in line A1 as shown in FIG.
G), (Ye + Mg), ..., (Cy + Mg), (Ye + G), ... on the A2 line, and (G + Cy), (Mg + Y) on the B1 line.
e), ..., and in the B2 line, (Mg +
Cy), (G + Ye), ...

The charges output from the image pickup device 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 pickup signal. By using this CDS circuit 13,
As is well known, reset noise can be reduced.

Timing pulses necessary for the image pickup device 12 and the CDS circuit 13 are supplied from a timing generator 14. The timing generator 14 has 8
Reference clock CK0 of fsc (fsc is color subcarrier frequency)
And horizontal and vertical sync signals HD and VD are supplied from the sync generator 16. On the other hand, the synchronization generator 1
6 is a clock CK of 4 fsc from the timing generator 14.
1 is supplied.

The image pickup signal output from the CDS circuit 13 is supplied to the level detection circuit 17, and the output signal of this detection circuit 17 is supplied to the iris driver 18. And
The iris driver 18 automatically controls the aperture of the iris 11.

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

The luminance signal Y is obtained by adding the adjacent signals. In FIG. 4, a + b, b +
The addition signals of c, c + d, d + e, ... Are sequentially formed.

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 Further, the A2 line is approximated by the following equation.

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

R−Y = (Ye + Mg) − (Cy + G) = (2R−G) Further, the A2 line is approximated by the following equation.

-(BY) = (Ye + G)-(Cy-Mg) =-(2B-G) The red difference signal R-Y and the red difference signal R-Y are similarly applied to the other lines of the A field and the line of the B field. The blue difference signal- (BY) is obtained line-sequentially and alternately.

Returning to FIG. 2, the image pickup signal output from the CDS circuit 13 is supplied to the low-pass filter 20 constituting the brightness processing section via the AGC circuit 19. The low-pass filter 20 performs an addition process (averaging) on signals adjacent to each other. Therefore, this low pass filter 2
The luminance signal Y is output from 0.

Further, the image pickup signal output from the AGC circuit 19 is supplied to the sample hold circuits 21 and 22 constituting the chroma processing section. Sample and hold circuit 21,
Sampling pulses SHP1 and SHP2 (illustrated by E and F in FIGS. 5 and 6) are supplied to 22 from the timing generator 14. Note that FIG. 5A shows the signal of the A1 line, and FIG.
Indicates the signal of the A2 line.

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

The subtractor 23 subtracts the signal S1 from the signal S2. Therefore, the subtractor 23 outputs the red color difference signal RY and the blue color difference signal-(BY) alternately line-sequentially (shown in FIGS. 5D and 6D).

The color difference signal output from the subtractor 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 has a delay circuit having a delay time of one horizontal period. It is supplied to the fixed terminal on the a side of the changeover switch 24 and the fixed terminal on the b side of the changeover switch 25 via 26.

The changeover of the changeover switches 24 and 25 is controlled by the controller 27. That is, one horizontal period in which the red difference signal RY is output from the subtractor 23 is b
It is connected to the side a while the horizontal difference signal − (B−Y) is output for one horizontal period. The controller 27 is supplied with the synchronization signals HD and VD from the synchronization generator 16 as reference synchronization signals and the clock CK1 from the timing generator 14.

Since the changeover switches 24 and 25 are switched as described above, the changeover switch 24 outputs the red color difference signal RY in each horizontal period, and the changeover switch 25 outputs the blue color difference signal − (in each horizontal period. BY) is output.

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

In the encoder 28, as is well known, the synchronizing signal SYNC is added to the luminance signal Y, the chrominance signal is quadrature two-phase modulated to form the carrier color signal C, and the color burst signal is added. .. And
The luminance signal Y and the carrier color signal C are added to form a color video signal SCV of the NTSC system, for example.

The color video signal SCV output from the encoder 28 is led to the output terminal 29 via the character generator 31. Further, the encoder 28 outputs a monochrome video signal SV (luminance signal Y to which the synchronization signal SYNC is added), the monochrome video signal SV is supplied to the electronic viewfinder 30, and an image pickup screen is displayed on the small CRT.

The controller 27 is also connected to a shutter switch 33 which is turned on when the shutter button 7 (shown in FIG. 1) is pressed. Shutter switch 3
When 3 is turned on, the shutter pulse PSH is supplied from the controller 27 to the photo camera unit 100, whereby the mechanical shutter is opened and an image is taken.

The shutter pulse PSH output from the controller 27 is supplied to the clock terminal CK of the counter 34, and is incremented each time the shutter pulse PSH is supplied. The controller 27 has a photo camera unit 1
00 supplies information IPH indicating the state of the photo camera unit 100 such as the presence or absence of a film and the exchange of the film. Then, when the film of the photo camera unit 100 is exchanged, a reset signal is supplied from the controller 27 to the reset terminal RE of the counter 34, and the counter 34 is reset. Therefore, the count value of the counter 34 indicates the number of images captured on the film loaded in the photo camera unit 100. The count output of the counter 34 is supplied to the controller 27.

A display setting switch 35 is connected to the controller 27. When the display setting switch 35 is in the off state, the character generator 31 described above does not operate, and the color video signal SCV output from the encoder 28 is directly supplied to the output terminal 29.

On the other hand, when the shutter switch 33 is turned on with the display setting switch 35 turned on and the photo camera unit 100 takes an image, the character generator 31 operates and the photo camera unit 100 takes an image. A display signal indicating that is generated. The display signal is the photo camera unit 10 of the color video signal SCV.
A color video signal SCV ', which is combined with a portion corresponding to the screen imaged at 0 (for example, several field periods) and the display signal is combined, is supplied to the output terminal 29.

Here, the display signal is supposed to display the count value of the counter 34 (the number of film images taken), the date and time, the mark indicating the weather, and the like, and which one is displayed is the keyboard 36 connected to the controller 27. It is set arbitrarily by the operation of.

When the shutter switch 33 is turned on, the controller 27 causes the character generator 31 to output data DATA such as count value, date and time, mark, etc. so that the character generator 31 generates the above-mentioned display signal. Synchronized clock CLK,
The strobe signal STB is supplied. The controller 27 has a clock circuit to obtain date and time data. Further, in order to synchronize the display signal and the image pickup signal, the character generator 31 receives a composite synchronization signal CSYNC and a vertical synchronization signal VSYNC from the synchronization generator 16.
Is supplied.

As described above, in this example, the shutter switch 33 is turned on while the display setting switch 35 is turned on.
When the photo camera unit 100 takes an image by turning on, the character generator 31 operates and the photo camera unit 10 operates.
A display signal indicating that the image is captured at 0 is generated, and this is combined with the portion of the color video signal SCV corresponding to the screen captured by the photo camera unit 100 and output.

Therefore, if the color video signal SCV 'output to the output terminal 29 is recorded by, for example, a VTR, the screen portion imaged by the photo camera unit 100 at the time of tape reproduction is displayed to indicate that the image is captured by the photo camera unit 100. Is performed, and it is possible to easily confirm the presence or absence of a photo. Figure 8
Shows a display example, where the A portion is the count value (the number of film images captured), the B portion is the date and time, and the C portion is the rain mark (weather mark).

By the way, in the example of FIG. 2, the color video signal SCV 'with the display signal combined or the color video signal SCV with no display signal combined is output. Therefore, it is impossible to record (display) the video signal SCV on one device and record (display) the video signal SCV ′ on the other device.

FIG. 9 shows that the video signal SCV or SCV 'can be arbitrarily selected and recorded (displayed) in each device. 9, parts corresponding to those in FIG. 2 are designated by the same reference numerals, and detailed description thereof will be omitted.

In the figure, the video signal SCV output from the encoder 28 is supplied to fixed terminals on the L side of the changeover switches 40a to 40c. The video signal SCV 'output from the character generator 31 is supplied to the H-side fixed terminals of the changeover switches 40a to 40c.
The output signals of the changeover switches 40a to 40c are VTR 41a and DA as a still image recorder, respectively.
T is supplied to the electronic viewfinder (EVF) 41c.

The changeover switches 40a to 40c are switched by the controller 27 from the control signals CTL1 to CTL3.
Are supplied and controlled. Control signals CTL1 to CTL3
The state of can be changed arbitrarily by operating the keyboard 36.

When the control signal CTL1 is set to the low level "L", the changeover switch 40a is connected to the L side and the video signal SCV is supplied to the VTR 41a.
On the other hand, when the control signal CTL1 is set to the high level "H", the changeover switch 40a is connected to the H side and the VT
The video signal SCV 'is supplied to R41a. DAT
The supply of signals relating to 41b and EVF 41c is controlled in the same manner.

Thus, according to the example of FIG. 9, the control signal C
VTR41a, DAT41 depending on TL1 to CTL3
b, the video signal SCV or SCV 'can be arbitrarily selected and recorded or displayed on the EVF 41c.

In the above embodiment, the video camera and the photo camera are integrated, but the same applies to a type in which a separate photo camera is fixed to the video camera for use. be able to. Further, the display is not limited to the count value, date and time, weather mark, etc. in the above-mentioned embodiment. In short, the photo camera section 1
Anything that indicates that the image was captured at 00 may be used.

[0056]

According to the present invention, the display signal indicating that the image is picked up by the photo camera can be combined and output to the portion of the image pickup signal corresponding to the screen imaged by the photo camera.
Therefore, for example, it is possible to record a display signal indicating that an image is picked up by a photo camera together with the image pickup signal on the VTR, and it is possible to easily confirm the presence or absence of a photograph during tape reproduction, thus improving usability.

[Brief description of drawings]

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

FIG. 2 is a diagram showing a configuration of a video camera unit.

FIG. 3 is a schematic diagram of color coding of the image sensor.

FIG. 4 is a diagram showing an output of a horizontal output register of an image sensor.

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 a configuration of a zoom driver.

FIG. 8 is a diagram illustrating an example of image pickup display.

FIG. 9 is a diagram showing another configuration of the video camera unit.

[Explanation of symbols]

 1 Cabinet 2, 3 Imaging Lens 4 Eye Cup 5T, 5W Zoom Operation Button 6 Recording Button 7 Shutter Button 8 Film Rewind Operation Button 12 CCD Solid-state Image Sensor 14 Timing Generator 16 Sync Generator 20 Low Pass Filter 21, 22 Sample Hold Circuit 23 Subtractor 24, 25 Changeover switch 26 Delay circuit 27 Controller 28 Encoder 29 Output terminal 30 Electronic viewfinder 31 Character generator 33 Shutter switch 34 Counter 35 Display setting switch 100 Photo camera section

Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location H04N 5/91 L 8324-5C

Claims (1)

[Claims] 1. A display signal generating means for generating a display signal indicating that an image has been captured in association with a shutter operation of a photo camera, and an image captured by the photo camera by the shutter operation of the image signal output from an image sensor. A video camera, characterized in that a portion corresponding to a screen is provided with signal synthesizing means for synthesizing a display signal output from the display signal generating means.