JPH01255384A - Camera mounting device - Google Patents

Abstract

PURPOSE:To easily obtain a video signal on which a cursor signal is superimposed by providing a cursor signal generating circuit and a superimposing circuit to superimpose the cursor signal on the video signal to a camera mounting device. CONSTITUTION:A cursor signal generating circuit 140 to generate the cursor signal based on the video signal transmitted from a camera main body and the superimposing circuit to superimpose the cursor signal from the cursor signal generating circuit 140 on the video signal are provided to the camera adapter. Namely, th cursor signal is generated by the cursor signal generating circuit 140, and the cursor signal is superimposed on the video signal from a camera main body 1 by a superimposing circuit 139. Thus, even in the case of the camera not to have the cursor signal generating circuit, the video signal, on which the cursor signal is superimposed, can be easily obtained by fitting the camera to it.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a camera mounting device having a mounting mechanism for detachably mounting a camera body.

[Summary of the invention]

The present invention provides a camera mounting device having a mounting mechanism for detachably mounting a camera body, in which a cursor signal is formed based on a video signal transmitted from the camera body, and the cursor signal is superimposed on the video signal. By this,
Even if the camera does not have a cursor signal forming circuit, by attaching it to the camera, it is possible to easily obtain a video signal on which a cursor signal is superimposed.

[Conventional technology]

Conventionally, some large video cameras for studio use are equipped with a cursor signal forming circuit. This cursor signal forming circuit generates cursor signals such as a cross-shaped center marker cursor, a rectangular box cursor, a rectangular safety zone cursor, etc. This cursor signal is generated together with a video signal from an image sensor of a television camera. , supplied to a viewfinder (comprising a CRT),
It is projected along with the image on the screen.

However, with a portable video camera (small camera),
Usually, a cursor signal forming circuit is not provided.

[Problem to be solved by the invention]

In view of this, the present invention seeks to propose a camera mounting device that can easily obtain a video signal with a cursor signal superimposed thereon even if the camera does not have a cursor signal forming circuit. It is something to do.

[Means to solve the problem]

The present invention provides a camera mounting device having a mounting mechanism for detachably mounting a camera body (1).
), and a superimposition circuit (139) that superimposes the cursor signal from the cursor signal formation circuit (140) on the video signal. It is something that

[Effect]

According to the present invention, the camera body (
A cursor signal is formed by a cursor signal forming circuit (140) based on the video signal transmitted from 1), and the cursor signal is formed by a superimposing circuit (139).
It is superimposed on the video signal from the camera body (1).

〔Example〕

An embodiment of the present invention will be described in detail below. First, the cursor synthesis device will be explained with reference to FIG. This cursor compositing device is installed in a camera adapter (2) to be described later, and receives a composite color video signal from a portable video camera (color video camera using COD) (1) to be described later, and based on this, cursor A signal is formed, the cursor signal is superimposed on a composite color video signal, and the composite color video signal on which the cursor signal is superimposed is supplied to a viewfinder (equipped with a CRT) (3) to be described later. There is.

(99) shows the cursor synthesis device as a whole, which includes a cursor signal synthesis circuit (102) and an adjustment circuit (101).
). Also, a cursor signal synthesis circuit (10
2) includes a cursor signal forming circuit (140) and an adder (
(139). Further, the cursor signal forming circuit (140) includes a vertical cursor signal forming circuit (121) and a horizontal cursor signal forming circuit (128). Then, the adjustment circuit (1
01) is switched and adjusted by operating the switch operator and adjustment knob of the adjustment panel (100) shown in FIGS. 2 and 5.

First, the adjustment circuit (101) will be explained.

(105) is an A/D conversion circuit, to which potentiometers (103A) to (103D) for adjusting the width, height, horizontal position, and vertical position of the cursor are connected, and each analog signal is transmitted every field. 8-bit time-division digital signals (data) of width, height, horizontal position, and vertical position are output.

(104A) to (104D) each move the rectangular safety zone (safety imaging area) cursor in FIG. 3C to 90%.
and a switch to switch to the 80% cursor or not to display the cursor, a switch to display or not display the box (rectangular) cursor in Figure 3B, and a switch to display or not display the cross-shaped center marker cursor. This is a changeover switch for placing a buffer amplifier (143) that drives a tally lamp (described later) in an operating state or in a non-operating state.

In addition, FIG. 2 shows an enlarged view of the adjustment panel (100) provided on the rear plate (30) of the camera adapter (2) (see FIG. 5) corresponding to this adjustment circuit (101). 103a
) ~ (103d) is a potentiometer (103A)
~(103D) S-circumference clamp, (104a) ~(10
4d) are switch operators for changeover switches (104A) to (104D).

Next, the cursor signal synthesis circuit (102) will be explained. (114) is a fluctuation display prevention circuit, which displays fluctuations in the cursor displayed on the screen of the viewfinder (having a CRT) (cursor position, dimensions, etc.) due to quantization noise of the A/D conversion circuit (105). This is to prevent the display from fluctuating slightly even though there is no command to change it. This fluctuation display prevention circuit (114
) configuration will be explained.

The 8-bit time-division digital signal from the A/D conversion circuit (105) is sent to the 8-bit 079777077 circuit (10
6) and the latched signal is supplied as a negative signal to the subtractor (112) and an 8-bit signal for storage of horizontal position, height, vertical position and width data. The signals are supplied to the 079777077 circuits (107) to (110), and are distributed and latched according to each signal. Also, these 079777077 circuits (107) to (110
), one type of signal out of four types of signals is selected for each field by a data selector (111), and is supplied as a positive signal to a subtracter (112). Then, in the subtracter (112), 0797770
The horizontal position, height, vertical position and width data latched in the 77 circuits (107)-(110) are subtracted with the corresponding type of data from the 079777077 circuit (106) for every l field. Then, each subtraction result is supplied to an error detector (113), and it is detected whether each subtraction result is O or not. If the error detector (113) detects that the subtraction result is O, the latched contents of the 079777077 circuits (107) to (110) do not change, and if it is detected that the subtraction result is not O, 079777077 circuits (107) to (110)
The latched data of the corresponding 079777077 circuit is replaced with the latest corresponding data latched in the 079777077 circuit <106).

(132) is a portable video camera (1) which will be described later.
This is an input terminal to which a composite color video signal is supplied. The composite color video signal from this input terminal (132) is supplied to an adder (139) and also to a sync separation circuit (133). This synchronous separation circuit (133)
In this case, a composite synchronization signal is separated from a composite color video signal. The separated composite synchronization signal is supplied to a horizontal and vertical synchronization separation circuit (134), and the horizontal synchronization signal (
H-5YNC) and vertical synchronization signal (V-5YNC) are separated.

The horizontal synchronization signal from the horizontal and vertical synchronization separation circuit (134) is supplied to a phase comparator (135), which receives the reference horizontal frequency signal (H-REF) from the horizontal control circuit (119).
The phase is compared with And this phase comparator (135)
The comparison output from
is supplied as an oscillation frequency control signal. The oscillation frequency of this voltage controlled variable oscillator (137) is, for example, 28
It is MHz.

Next, the vertical cursor signal forming circuit (121) will be explained. (115) is a horizontal counter, which counts the clock signal from the above-mentioned oscillator (137). This horizontal counter (115) has a 079717071 circuit (
107), and the horizontal position data is set (loaded) by the horizontal synchronization signal from the horizontal and vertical synchronization separation circuit (134).

This horizontal counter (115) is set (loaded)
The above-mentioned clock signal is added and counted from the value, and when the count reaches the maximum value, a carry signal is generated and the carry signal is supplied to the up/down control circuit (116). Thus, the up/down control circuit (116
), the horizontal counter (115) is switched to subtraction counting. And this horizontal counter (
The counting contents of the digital level comparator (117)
) and is compared with the height data from the 079777077 circuit (108). A pair of vertical cursor signals are output from this level comparator (117).

Now, the horizontal counter (115) is 079777077
When the horizontal position data from the circuit (107) is not set (loaded), the count content changes from “00” to “FF”.
” (both are hexadecimal numbers), the oscillator (1
37), and when the counted value reaches the maximum value "FF", a carry signal is output from the horizontal counter (115), and this is supplied to the up/down control circuit (116). This upload/
A down control circuit (116) controls this horizontal counter (11
5) to switch the counting to subtraction counting. In this way, the horizontal counter (115) uses the oscillator (137) until its count changes from "FF" to "00".
When the count value reaches the minimum value "00", a carry signal is output from the horizontal counter (115), which is sent to the up/down control circuit (
116), this up/down control circuit (116) controls this horizontal counter (115) and switches its counting to addition counting. This operation is repeated thereafter. In this case, the horizontal counter (1
15) The period of one cycle in which the count contents change from "OO" to "FF" to "OO" corresponds to one horizontal cycle period. Then, 1 from 079717071 circuit (107)
When the horizontal position data that arrives every horizontal cycle is set in the horizontal counter (115) every time a horizontal synchronization signal arrives,
The content of the count immediately becomes the value, and at that point, if the counting direction is addition, addition counting continues as is, and if the counting direction is subtraction, it immediately changes to addition counting.

Here, if we consider the change in the count content of the horizontal counter (115) as an analog value, this is a triangular wave whose upward slope and downward slope are both constant and whose absolute values are equal (actually, it is a stepped triangular wave). Become.

When the horizontal counter (115) is not set, the phase of the apex of the triangular wave does not change, and when certain horizontal position data is set, the phase of the triangular wave and therefore the apex of the triangular wave are changed according to the horizontal position data. The phase of changes. Therefore, when the horizontal position data is not set in the horizontal counter (115), the phase of the apex of the triangular wave (this is referred to as the O phase) is determined by the pair of box cursors displayed on the screen of the viewfinder (3). This corresponds to the case where the horizontal center between the vertical lines is located at the horizontal center of the tube surface. Thus, depending on the horizontal position data,
When the phase of the triangular wave, and therefore the phase of its apex, deviates from the 0 phase by a predetermined amount, the horizontal center between the pair of vertical lines of the box cursor displayed on the screen of the viewfinder (3) This means that it is shifted from the horizontal center of the surface by a length corresponding to a predetermined amount of its phase.

When the change in the count content of the horizontal counter (115) is considered as a triangular wave, the digital level comparator (117) outputs the count output of the horizontal counter (115) and the height data from the 079717071 circuit (108). (However, this value is within the range of "00" to "FF" mentioned above, and is referred to as "XX.") This means that the triangular wave corresponds to this height data "XX". This results in slicing using analog values. The height of this sliced triangular wave corresponds to the length of the pair of vertical cursors displayed on the screen of the viewfinder (3).

(118) is another horizontal counter, and (119) is a horizontal control circuit to which the counting output of the horizontal counter (118) is supplied. Then, the clock signal from the oscillator (137) passes through the horizontal control circuit (119) to the horizontal counter (
118) and its horizontal counter (11
8), like the above-mentioned horizontal counter (115), its counting direction is controlled by the horizontal control circuit (119), and the counting contents are changed from "OO" to "FF" to "00" (
both hexadecimal numbers). Then, the horizontal control circuit (1
At step 19), the count output of the horizontal counter (11B) is digitally compared in level with the height data of a pair of vertical cursor signals of the 90% and 80% safety zone cursors.

Thus, from the horizontal control circuit (119), 90% and 8
A pair of vertical cursor signals for a 0% safety zone cursor is output.

Then, a pair of vertical cursor signals of the box cursor from the digital level comparator (117), a horizontal counter (
115) (a signal representing the horizontal center of the box cursor and a pair of vertical cursor signals of the safety zone cursor from the horizontal control circuit (119) and a signal representing the horizontal center of the safety zone cursor) , are supplied to a horizontal signal generator (120) as a vertical cursor signal generator.This horizontal signal generator (120) corrects the height of a pair of vertical cursor signals, and adjusts the height of a box cursor and safety zone cursor. A vertical cursor signal of a cross-shaped center marker cursor is formed from a signal representing the horizontal center.Then, each vertical cursor signal from this horizontal signal generator (120) is supplied to a data selector (129). selected.

Next, the horizontal cursor signal forming circuit (128) will be explained, but since each component thereof corresponds to each component of the vertical cursor signal forming circuit (121), detailed explanation of its structure and operation will be omitted. do. (122) is a vertical counter, which counts the reference horizontal frequency signal from the above-mentioned horizontal control circuit (119). This vertical counter (1
22) is supplied with vertical position data from the 079717071 circuit (109), and is set (loaded) by the vertical synchronization signal from the horizontal and vertical synchronization separation circuit (134).

This vertical counter (122) is set (loaded)
From the value, the reference horizontal frequency signal mentioned above is added and counted, and when the count reaches the maximum value, a carry signal is generated,
The carry signal is the amplifier/down control circuit (123)
supplied to When the amplifier/down control circuit (
The vertical counter (12) is controlled by the control signal from the vertical counter (123).
2) is switched to subtractive counting. The count contents of this vertical counter (122) are calculated by the digital level comparator (
124) & is supplied, 079717071 circuit (1
10). A pair of horizontal cursor signals are output from this level comparator (124).

(125) is another vertical counter, and (126) is a vertical control circuit to which the counting output of the vertical counter (125) is supplied. Then, the reference horizontal frequency signal from the horizontal 11J control circuit (137) is supplied to the vertical counter (125) through the vertical control circuit (126), and the vertical counter (125) is connected to the vertical counter (122) described above.
), the counting direction is controlled by the vertical control circuit (126), and the counting contents range from "00" to "FF".
” to “00゛ (both hexadecimal numbers). and,
In the vertical control circuit (126), a vertical counter (12
The count output of 5) is digitally compared in level with the width data of a pair of horizontal cursor signals of the 90% and 80% safety zone cursors.

Thus, from the vertical control circuit (126), 90% and 8
A pair of horizontal cursor signals for a 0% safety zone cursor is output.

Then, a pair of horizontal cursor signals of the box cursor from the digital level comparator (124), a vertical counter (
a pair of horizontal cursor signals for the safety zone cursor from the vertical control circuit (126) and a signal representing the vertical center of the safety zone cursor from the vertical control circuit (126); is supplied to a vertical signal generator (127) as a horizontal cursor signal generator.This vertical signal generator (127) modifies the width of a pair of horizontal cursor signals, and adjusts the width of a box cursor and safety zone cursor. A horizontal cursor signal for a cross-shaped center marker cursor is formed from the signal representing the vertical center. Each horizontal cursor signal from this vertical signal generator (127) is then supplied to a data selector (129) for selection. be done.

Then, the vertical and horizontal cursor signals from the horizontal signal generator (120) and the vertical signal generator (127), respectively, are supplied to the data selector (129), and the switching switch f
(104A) to (104D) are selected and synthesized by the switching signals, and a box cursor signal of arbitrary position and size, a center marker signal of a cross shape at the center, a safety zone cursor signal, a cross shape at the center. A center marker signal is output, which is sent to the adder <
139), is added (superimposed) to the composite color video signal from the input terminal (132), and is output to the output terminal (141).
) and supplied to a viewfinder (3), which will be described later.

In addition, (131) is a stabilized power supply circuit (regulator),
An external DC voltage is supplied from the input terminal (130), and based on this, DC voltages of +9V and +5V are output and supplied to each circuit.

(13B) is the rlE from the video camera (1).
(142) is the REC/TALLY (
Record/Tally), BATT (Battery), GAIN
In the plurality of output terminals for each UP (gain up) display signal, the plurality of input terminals (138) and the plurality of output terminals (142) are connected to each other via a plurality of connection lines. Note that the tally display signal from the input terminal (138) is supplied to the buffer amplifier (143). This buffer amplifier (143) is connected to the adjustment circuit (101).
), and the tally display signal from this buffer amplifier (143) is controlled by the tally lamps (145) on both sides of the video camera (1) (the screen shown in FIGS. 4 and 7). Lamp (21
).

Next, a camera adapter, a video camera attached to the camera adapter, and a viewfinder will be explained with reference to FIGS. 4 to 7.

Fig. 4 is a right side view of the camera adapter with the video camera and viewfinder attached, Fig. 5 is a rear view of the camera adapter with the viewfinder attached, and Fig. 6 is a right side view of the video camera. FIG. 7 is a right side view of the camera adapter.

(1) is a portable video camera, and here it is a color video camera using a CCD as an image sensor. (
2) is a camera adapter to which the balk pull video camera (1) can be attached to allow the portable video camera (1) to be used as a studio video camera. It also features a large viewfinder (3), which is necessary for a studio video camera.
) is attached to the camera adapter (2). Further, the camera adapter (2) is provided with the above-mentioned cursor composition device (99) so that the cursor signal can be superimposed on the composite color video signal transmitted from the video camera (1) to the viewfinder (3). There is.

First, the video camera (1) will be explained.

(4) is a lens (zoom lens) (lens barrel equipped with a lens), which is attached to the front of the video camera (1) by a lens mount (5).

(6) is a handle, which is provided on the top of the video camera (1). Reference numeral (7) denotes a shoulder rest as a stand, which is the part that comes into contact with the shoulder of the cameraman when he carries the video camera (1) on his shoulder when using the video camera (1) as a portable video camera.

(8) is a plurality of switch operators, which are provided on the right side of the shoulder rest (7) on the side closer to the front.

(9) is the shoe for the viewfinder, and the shoe for the video camera (
1) is attached to the left side of the front.

The viewfinder attached to the shoe (9) is a small viewfinder when the video camera (1) is used as a portable video camera, and is different from the viewfinder (3) attached to the camera adapter (2).

(10) ((log), (10b), (10c)) are a plurality of connectors, which are provided on the back of the video camera (1). (11) is a plurality of switch operators, which are provided at the rear of the right side of the video camera (1). (12)
is a single-opening door located on the right side of the video camera (1). Note that when this door (12) is opened, a plurality of switch operators, a plurality of adjustment operators, etc. are provided inside. (13) is a mat, which is provided on the right side of the video camera (1) and is the part that comes into contact with the photographer's face when the video camera (1) is used as a portable video camera.

Next, the camera adapter (2) will be explained.

This camera adapter (2) is composed of a bottom plate (27) each made of a metal plate, a pair of side plates (28) that can have the same shape, a top plate (29), and a rear plate (30), and is assembled by screwing. It is being The bottom plate (27) has a substantially U-shaped cross section, and cutouts (31) are provided on both sides of the front part of the bottom plate (27).
Portions of a plurality of switch operators (8) of the video camera (1) are made to face the outside. In addition, this bottom plate (27
), attach the bottom of the video camera (1) to the bottom! &(27)
A locking means for fixing the locking means is provided, and (25) is a lock release lever of the locking means, although illustration and explanation of the detailed structure thereof will be omitted.

(38) is a hole provided in the rear side plate portion of the bottom plate (27), through which the connection cord passes.

Incidentally, a threaded hole to which a tripod (not shown) is to be attached is provided on the lower surface of the bottom plate (27).

The pair of side plates (28) are of an abbreviated type, and together with the bottom plate (27) and the rear plate (30), a substantially rectangular window hole (32) is formed.

This window hole (32) is provided in the right side panel (28) so that the plurality of connectors (1o) of the video camera (1) and the plurality of switch operators (11) are exposed to the outside. Although not shown, a plurality of switch operators and a plurality of connectors at the rear left side of the video camera (1) are also provided on the left side plate (28) so as to face the outside. Further, at least the right side plate (28) is provided with a rectangular window hole (33). This window hole (33) allows the door (12) of the video camera (1) to face the outside, and allows the door (12) to be opened and closed through the window hole (33).

Additionally, the pair of side plates (28) each have a camera number (2).
3) and a tally lamp (21) is provided. Furthermore, the common side plate (28) has a connector (
22) is provided.

This connector (22) outputs a composite color video signal on which a cursor signal is superimposed from the cursor composition device, and is connected to the viewfinder (3) through a connector connection cord. Make it.

A fixture (24) for attaching the viewfinder (3) is provided on the top plate (29), and the viewfinder (3) is attached to this and fixed with a tightening screw (26).

The above-mentioned cursor synthesis device is built inside the upper part of the rear plate (30), and an adjustment panel (100) for the cursor synthesis device is provided on the surface thereof. still,
The viewfinder (3) is attached so that its tube surface (20) faces the rear of the camera adapter (2), and the cameraman can use the tube surface (20) of the viewfinder (3) to
A plurality of adjustment operators and a plurality of switch operators of the adjustment panel (100) can be operated while looking at the figure.

Further, the rear plate (30) is provided with a window hole (36), through which other connectors can be connected to the plurality of connectors (1o) at the rear of the video camera (1). etc. are made possible. Also, this rear board (30)
There are four magnets (3) on both sides above and below the window hole (36).
5), a rectangular parallelepiped camera controller (not shown) for remotely controlling the video camera (1) is attached to the rear plate (3o) by its magnet (35), and the video camera (1) is It can be attached to a camera adapter (2) and used as a camera controller when used as a studio camera. Furthermore, (37
) is a pair of four parts that hold the camera controller, and after this the board (
3o) This is so that the fingers of the hands can fit into both sides of the camera controller when attaching and detaching it.

In this way, when attaching the camera controller to the rear plate (30), adjust the video camera (1) while looking at the tube surface (2o) of the viewfinder (3) on the rear side of the camera adapter (2). becomes possible. Furthermore, this video camera (
1) can also be controlled by a separately provided camera control unit instead of this camera controller.

According to the camera adapter (2) described above, since the cursor synthesis device (99) is provided, even if the video camera (1) does not have a cursor signal forming circuit, by attaching it to the cursor signal forming circuit, the cursor synthesis device (99) can be attached. A composite color video signal in which signals are superimposed can be easily obtained. Also, the camera adapter (2) is connected to the viewfinder (3).
This video camera (1) is suitable for use as a studio camera, and the composite color video signal on which the cursor signal is superimposed can be transmitted through the viewfinder (1). 3). Further, the composite color video signal may be supplied to a small viewfinder attached to the shoe (9) of the video camera (1), and the adjustment panel (100) of the cursor composition device (99) may be Since it is provided at the rear of the camera adapter (2), its adjustment is easy.

〔Effect of the invention〕

According to the present invention described above, even if the camera does not have a cursor signal forming circuit, by attaching it to the camera, it is possible to obtain a camera device that can easily obtain a video signal on which a cursor signal is superimposed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of a cursor synthesis device,
Fig. 2 is a diagram showing an example of the adjustment panel, Fig. 3 is a diagram showing an example of a cursor, Fig. 4 is a right side view showing an example of a camera adapter with a balk pull camera and a viewfinder attached, and Fig. 4 is a diagram showing an example of a cursor. FIG. 5 is a rear view of an example of a camera adapter with a viewfinder attached, FIG. 6 is a right side view of an example of a portable video camera, and FIG. 7 is a right side view of an example of the camera adapter. (1) is a video camera, (2) is a camera adapter, (3)
) is the viewfinder, (99) is the cursor synthesizer,
(100) is the adjustment panel, (101) is the adjustment circuit, (1
40) is a cursor signal forming circuit, and (139) is an adder. 5 lenses 8 switches 11 switches f Portable video camera Figure B

Claims (1)

[Scope of Claims] A camera mounting device having a mounting mechanism for detachably mounting a camera body, comprising: a cursor signal forming circuit that forms a cursor signal based on a video signal transmitted from the camera body; A camera mounting device comprising: a superimposing circuit for superimposing a cursor signal from the cursor signal forming circuit.