JPH11112856A - Operation unit for photographing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To omit an A/D converter for converting the voltage value of a potentiometer for indicating the present position of the driving part of a remote control universal head and a photographing device to digital signals by considering the delay element or the like of the driving part of the remote control universal head and the driving part of the photographing device and obtaining the digital signals for indicating the present position from commanded position signals on calculation. SOLUTION: This operation unit 10 outputs position signals for indicating a control target value to the pan driving part 21 and tilt driving part 22 of the remote control universal head and a zoom driving part 23 and a focus driving part 24 in the photographing device loaded on the remote control universal head. Also, the operation unit 10 calculates the digital signals to which delay from the point of time of outputting the position signals until the respective driving parts 21-24 reach positions indicated by the position signals is added beforehand for the position signals and transmits the calculated digital signals to a computer 30 synchronized with the output to the respective driving parts 21-24 of the position signals.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation unit of a photographing apparatus, and more particularly to an operation unit of a photographing apparatus for remotely controlling a remote control head and a television camera mounted on the remote control head.

[0002]

2. Description of the Related Art When synthesizing a real image and a computer graphics image, a main subject is photographed in a virtual studio such as a broadcasting station, and the real image and a computer graphics image showing the background of the real image are obtained. Are synthesized. In addition, in the virtual studio system, the pan and tilt angles of the remote control head and the zoom of the lens of the TV camera mounted on the remote control head are used to change the computer graphics image in accordance with the movement of the real image. Position information indicating the position and the focus lens position is transmitted to the computer.

FIG. 3 shows a conventional system of this kind, in which 1 is an operation unit, 20 is a photographing device showing a remote control head and a television camera mounted on the remote control head,
0 is a computer. The operation unit 1 is capable of transmitting analog signals indicating the pan angle, the tilt angle, the zoom position, and the focus lens position to the photographing device 20 via the multi-cable 2, thereby controlling the remote control head and the lens. Remote control. On the other hand, the photographing device 20 converts an analog voltage of a potentiometer for detecting a pan angle, a tilt angle, a zoom position, and a focus lens position into a digital signal by an A / D converter, and takes the digital signal into a central processing unit. Computer 30 via serial communication cable 3
To be transmitted.

[0004]

However, in the above-mentioned conventional system, the photographing apparatus 20 must be provided with an A / D converter for converting the analog voltage of each potentiometer into a digital signal. Since the A / D converter used is expensive, there is a problem that the cost increases. In addition, since a space for a printed circuit board for providing an A / D converter and the like is required, there is a problem that the size of the device is increased.

The present invention has been made in view of such circumstances, and does not require the provision of an A / D converter or the like in the photographing apparatus, thereby reducing the cost and space. The purpose is to provide.

[0006]

According to the present invention, in order to achieve the above object, a position signal indicating a control target value is provided to a drive unit of a remote control head and a drive unit of a photographing device mounted on the remote control head. In the operation unit of the photographing apparatus that outputs a digital signal to the position signal, a digital signal to which a delay from the time when the position signal is output to the time when the driving unit reaches the position indicated by the position signal is calculated in advance, The calculated digital signal is transmitted to a computer in synchronization with the output of the position signal to the drive unit.

According to the present invention, the current position (pan angle and tilt angle) of the drive unit of the remote control head and the current position (zoom position and focus lens position) of the drive unit of the photographing apparatus are provided.
Is not converted into a digital signal by an A / D converter, but a digital signal indicating a current position is calculated from a commanded position signal in consideration of a delay element or the like of the driving unit. This digital signal is transmitted to a computer.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the operation unit of the photographing apparatus according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a schematic diagram of a system to which an operation unit according to the present invention is applied. In the figure, reference numeral 10 denotes an operation unit according to the present invention, reference numeral 20 'denotes a photographing device without an A / D converter or the like, and reference numeral 30 denotes a computer. The operation unit 10 and the photographing device 20 ′ are connected by the multi-cable 2, and the operation unit 1
0 and the computer 30 are connected by a serial communication cable 3.

FIG. 2 is a block diagram showing a main configuration of the system shown in FIG. As shown in FIG. 2, the operation unit 10 mainly includes an operation unit 11, a central processing unit (CP).
U) 12, a D / A converter 13, a memory 14, an interface 15, and the like. Operation unit 11
As shown in FIG. 1, a joystick 11A for commanding a pan angle and a tilt angle, a zoom dial 11B for commanding a zoom position, a focus dial 11C for commanding a focus lens position, and a desired shot are possible. Group 11 for selecting appropriate shot information from a plurality of shot information stored in advance as described above
D and the like. Each shot information is composed of information indicating a pan angle, a tilt angle, a zoom position, and a focus lens position.

A signal corresponding to the operation amount of the joystick 11A, zoom dial 11B, focus dial 11C, etc. is applied to the CPU 12. The CPU 12
A signal corresponding to the input operation amount is integrated and converted into position data. That is, when the joystick 11A is tilted in the left-right direction, position data (pan angle data) in which the pan angle changes sequentially according to the inclination angle of the joystick 11A is obtained. Tilt angle data in which the tilt angle changes sequentially according to the tilt angle of 11A is obtained. Similarly, when the zoom dial 11B is rotated,
Zoom position data in which the zoom position changes sequentially according to the amount of rotation is obtained, and when the focus dial 11C is rotated, focus lens position data in which the focus lens position changes sequentially according to the amount of rotation is obtained.

The pan angle data, tilt angle data, zoom position data, and focus lens position data are converted into analog signals by a D / A converter 13, and are sent from the analog output terminal 16 to the multi-cable 2 and the photographing device 20 '. Are output to the pan drive unit 21, the tilt drive unit 22, the zoom drive unit 23, and the focus drive unit 24 via the analog input terminal 25 of the.

The pan driver 21 mainly includes a servo amplifier 21A, a motor 21B, and a potentiometer 21C for outputting a voltage signal corresponding to a pan angle. The servo amplifier 21A receives a pan signal input through an analog input terminal 25. Analog signal indicating angle (voltage signal)
Is output to the motor 21B such that the voltage signal detected by the potentiometer 21C matches the voltage signal detected by the potentiometer 21C. still,
The tilt drive unit 22, the zoom drive unit 23, and the focus drive unit 24 are configured similarly to the pan drive unit 21.

Further, the pan angle data, the tilt angle data, the zoom position data and the focus lens position data are stored in the memory 14 in advance corresponding to the shot numbers so that a desired shot can be performed. By selecting a shot number with the button group 11D, pan angle data, tilt angle data, zoom position data, and focus lens position data corresponding to the shot number can be read from the memory 14 and output via the D / A converter 13. It has become.

Further, the pan angle data, the tilt angle data, the zoom position data, and the focus lens position data can be output from a serial terminal 17 via a communication interface 15. Next, details of the operation unit 10 according to the present invention will be described. This operation unit 10 is a conventional operation unit 1 shown in FIG.
Mainly, the processing of the CPU 12, the storage content of the memory 14, and the like are different.

That is, the memory 14 starts outputting a position signal from the operation unit 10 to each of the driving units 21 to 24,
A transfer function with a time delay until each of the driving units 21 to 24 reaches the position indicated by the commanded position signal is stored for each driving unit. This transfer function can be obtained by actually driving each drive unit. C
The PU 12 has, for example, a digital filter corresponding to each of the driving units 21 to 24, and a filter coefficient corresponding to a transfer function stored in the memory 14 in advance is set in each digital filter. When transmitting a digital signal corresponding to the voltage value of the potentiometer of each drive unit to the computer 30, a position signal is output to each of the drive units 21 to 24, and at the same time, a signal sequence of the position signal (position data) is output. , A digital signal to which a delay in each drive unit is added by a convolution operation with a filter coefficient of a digital filter. The digital signals corresponding to the current pan angle data, tilt angle data, zoom position data, and focus lens position data thus obtained are transmitted from the serial terminal 17 to the computer 30 via the communication interface 15.

In this embodiment, the case where the input signal is delayed by using the digital filter has been described. However, the present invention is not limited to this, and a digital signal delayed by the delay in the driving unit is obtained by calculation. Anything may be used. In addition, a serial signal that does not add the above-described delay can be output from the serial terminal to the image capturing apparatus via, for example, a modem, a relay box, or the like.

[0017]

As described above, according to the present invention, a digital signal indicating a current position is calculated from a commanded position signal in consideration of a delay element of a drive unit of a remote control head or a drive unit of a photographing device. Since the digital signal obtained above is transmitted to the computer, an A / D converter for converting the voltage value of the potentiometer indicating the current position of the remote control head and the drive unit of the photographing device into a digital signal becomes unnecessary, and the cost is reduced. Downsizing and space saving can be achieved. Another advantage is that a system that has already been sold can be dealt with only by changing the program.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of a system to which an operation unit according to the present invention is applied.

FIG. 2 is a block diagram showing a main configuration of the system shown in FIG. 1;

FIG. 3 is a configuration diagram of a conventional system.

[Explanation of symbols]

 Reference Signs List 10 operation unit 11 operation unit 12 central processing unit (CPU) 13 D / A converter 14 memory 15 interface 16 analog output terminal 17 serial terminal 20 'photographing device 21 pan driving unit 21A servo Amplifier 21B Motor 21C Potentiometer 22 Tilt drive unit 23 Zoom drive unit 24 Focus drive unit 30 Computer

Claims (3)

[Claims] An operation unit of a photographing apparatus for outputting a position signal indicating a control target value to a driving unit of a remote control head and a driving unit of a photographing apparatus mounted on the remote control head, Calculating a digital signal to which a delay from when the position signal is output to when the drive unit reaches the position indicated by the position signal is added in advance, and in synchronization with the output of the position signal to the drive unit, the calculation is performed. An operation unit of the photographing apparatus, wherein the operation unit transmits the converted digital signal to a computer. 2. An operation unit of a photographing apparatus for outputting a position signal indicating a control target value to a driving unit of a remote control head and a driving unit of the photographing apparatus mounted on the remote control head, outputting the position signal. Storage means for storing, for each drive unit, a transfer function with a time delay from the point in time until the drive unit reaches the position indicated by the position signal, and a transfer function of the drive unit corresponding to the position signal and the position signal A calculating means for calculating a digital signal corresponding to the current position of the driving unit based on and a digital signal calculated by the calculating means for the position signal in synchronization with the output of the position signal to the driving unit. An operation unit of the photographing apparatus, comprising: output means for transmitting the data to a computer. 3. The photographing device according to claim 1, wherein the position signal includes a signal for commanding a pan angle and a tilt angle of the remote control head, and a signal for commanding a zoom position and a focus lens position of the photographing device. Operation unit of the device.