JPH0223070B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a plurality of television cameras,
The present invention relates to a control device for a television camera that allows centralized remote adjustment using a common adjustment device.

In television cameras, especially color television cameras (hereinafter simply referred to as cameras), there are changes in the characteristics of various components used due to temperature changes and changes over time, or changes in the color temperature of illumination light during image capture. In order to compensate for this, the image quality changes significantly, so a large number of adjusters are provided to adjust the gain and bias values of various circuits, and the configuration is configured so that adjustments can be made again as necessary. is common.

For example, in large cameras such as studio cameras, the number of regulators for this purpose ranges from tens to hundreds, and they are mounted on external circuit boards. Conventionally, regulators that require frequent adjustment have been placed together in a panel-shaped adjustment device called an adjustment console (hereinafter simply referred to as an adjustment console) to facilitate adjustment work. .

However, in conventional camera systems, this adjustment console is dedicated to each camera, so it is necessary to select the adjustment console attached to that camera for each camera that requires adjustment. In cases where several to dozens of cameras are used per studio, such as in television broadcasting stations, adjusting the cameras is extremely troublesome, prone to misadjustments, and the space factor is large. The drawback was that it got worse.

Therefore, in order to eliminate these drawbacks of the conventional technology, we have developed a camera in which a single adjustment console is installed at a predetermined location, and multiple cameras can be arbitrarily switched and selected using this adjustment console for centralized remote adjustment. A control system has been proposed, an example of which will be described with reference to FIG.

In the figure, 1 is a centralized control console, 2A to 2C are cameras, 3 is a data transmitter/receiver, 4 is a memory, 5 is a digital/analog conversion circuit (D/A), 6 is a flip-flop (FF), 7 is a camera circuit, 8o,
8a to 8c are control cables, 9 is cable 8
10 is a data receiving circuit, and 11 is a switch control circuit.

The centralized adjustment console 1 is equipped with an encoder, a switch, etc. for camera adjustment, and a switch for selecting any one of all the cameras 2A to 2C included in this control system. The adjustment data is converted into a digital amount as camera control data, and is transmitted from the cable 8o to one of the cameras 2A to 2C via one of the cables 8a to 8c switched by the switcher 9.

Each of the cameras 2A to 2C has D/A5 and FF6 instead of various adjusters and switches such as variable resistors that were conventionally provided for adjustment.
Accepts adjustment data via electrical signals from
The operating conditions are thereby set, and when the central control console 1 is accessed by the switcher 9 via the cables 8a to 8c, the contents of the memory 4 are rewritten by the control data received by the data transmitter/receiver 3. , operating conditions are set based on the data in the memory 4 and the state of the FF 6, and an imaging operation is performed.

At this time, if the control data transmitted via the cables 8o, 8a to 8c is 8 bits and 2 channels, the adjustment data consists of 2 ⁸ = 256 variable ranges of adjustment amounts and 256 types of adjustment items. It is possible to transmit data that allows selection of the following, and is sufficient for camera adjustment.

In addition, in this conventional example, switching of adjustment items is
This is done using the FF6, and its output is used to switch circuit switching electronic switches, etc. Therefore, the necessary number of FF6s are provided depending on the adjustment item.

The switcher 9 monitors the control data from the central control console 1 via the cable 8o with the receiving circuit 10, and when a predetermined switching signal is received, the switcher 9 operates the switch control circuit 11 and switches one of the contacts a, b, and c. Close cable 8o and connect cables 8a to 8c.
It functions to connect to either. In the figure, contact a is closed and control data from the centralized control console 1 is transmitted to the camera 2A.

Therefore, according to the control system shown in FIG. 1, a plurality of cameras, for example, three cameras 2A, 2B, and 2C, can be arbitrarily selected at any time by the single centralized control console 1, and Since remote adjustment is possible, camera operation in a studio or the like where a large number of cameras are used can be easily performed and always under correct operating conditions.

However, in the camera control system shown in FIG. 1, the central adjustment console 1 is the only one.
Since it is a stand, it has the following drawbacks.

(1) The number of cameras that can be adjusted at the same time is limited to one, so if the number of cameras included in the system increases, it will take a long time to finish adjusting all the cameras.

(2) Camera adjustment work is limited to a specific location, and it is not possible to arbitrarily select multiple different locations and adjust the camera from there.

(3) If a failure occurs in the central adjustment console, it will immediately become impossible to adjust all cameras.

An object of the present invention is to eliminate the drawbacks of the prior art described above, reduce adjustment time even when a large number of cameras are included in a system, and allow camera adjustment to be made from any number of locations, while also allowing for centralized adjustment. To provide a camera control device in which camera adjustment does not become impossible immediately even if a failure occurs in an adjustment console.

In order to achieve this objective, the present invention is characterized in that in a control system having a large number of cameras, at least two centralized adjustment consoles are provided, thereby making it possible to independently adjust all the cameras. .

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a control device for a television camera according to the present invention will be described below with reference to the drawings.

Fig. 2 shows an embodiment of the present invention, in which 1A and 1B are first and second centralized control consoles, 2A and 2B are cameras, and 1
2 is a switcher, 13 is a data transmitter/receiver, 14
1 is a memory such as a RAM (random access memory), 15 is a switch control circuit, and 16 is a time division switch. In addition, 8 ₁ is a cable between the first central adjustment console 1A and the switcher 12, and 8 ₂
Similarly, cables 8a and 8b are connected from the second centralized control console 1B, and cables 8a and 8b are the same as in the conventional example shown in FIG. Further, the first and second central adjustment consoles 1A and 1B are the same as the central adjustment console 1 in the conventional example shown in FIG. 1, and the cameras 2A and 2B are also the same as the cameras 2A and 2B in FIG.

Next, the operation will be explained.

The data transmitter/receiver 13 gives a signal to the switch control circuit 15, operates the time division switch 16, and monitors the control data from the first central adjustment console 1A and the second central adjustment console 1B in a time division manner. For example, when a switching signal from the first centralized control console 1A to the camera 2A is detected, the switch control circuit 15
Supply the specified switching data to the contact point as shown.
Close a ₁ and connect cables 8 ₁ and 8a. At the same time, data indicating that the first central adjustment console 1A is accessing the camera 2A is written in the memory 14.

Therefore, at this time, the camera 2A can be adjusted using the first centralized adjustment console 1A.

On the other hand, suppose that in this state, the second central adjustment console 1B is operated and a switching signal for the camera 2B is now included in the control data.
This switching signal is detected by the data transmitter/receiver 13 via the time division switch 16, so the data transmitter/receiver 13 examines the data in the memory 14, and the camera 2B is connected to another centralized control console (in this example, the After confirming that it is not being accessed by the centralized control console 1A), data is supplied to the switch control circuit 15, and the contact _b2 is closed.

As a result, the second centralized adjustment console 1B is connected to the camera 2B.
Since the second central adjustment console 1B can be used to adjust the camera 2B, the first and second adjustment consoles 1A and 1B can be used to adjust the cameras 2A and 2B in parallel. can. In addition,
At this time, data is also transmitted from the data transceiver 13 to the memory 14.
Needless to say, data indicating that the camera 2B is being accessed by the second centralized control console 1B is written.

On the other hand, unlike this case, when the camera 2A is being accessed by the first centralized adjustment console 1A, the second centralized adjustment console 1B is operated, and the camera 2A is accessed by the first centralized adjustment console 1A.
Assume that a switching signal for A is inserted into the control data. However, at this time, data indicating that the camera 2A is being accessed by another centralized control console 1A is written in the memory 14, so the data transmitter/receiver 13 transmits the camera from the second centralized control console 1B. When the switching signal for camera 2A is received and the memory 14 is checked, it is found that this camera 2A is already being adjusted by another centralized adjustment console 1A, so predetermined data representing this is transferred to the second centralized adjustment console. 1B, and the data is not supplied to the switch control circuit 15.

Therefore, at this time, the second central adjustment console 1B
Double access to camera 2A by
Since it is displayed that the camera 2A is being adjusted and access to it is prohibited, the operator can be informed that the selection operation for the camera 2A is an erroneous operation.

As a result, the first and second central adjustment consoles 1A and 1B
By operating contacts a ₁ and a ₂ , camera 1A is operated, and contacts b ₁ and b ₂ are operated, camera 2B is selected and adjusted. Moreover, it is possible to operate two cameras at the same time. Central control consoles 1A and 1B
Since access to the same camera by the operator is prohibited, there is no risk of erroneous operation, and since the operator will immediately understand that it was an erroneous operation, there will be no need to repeat unnecessary operations or cause psychological burden to the operator. Things will go away.

Although not specifically shown in the above embodiment, since it is not desirable to perform adjustment operations for the cameras 2A and 2B during on-air, these cameras 2A and 2B are
If data indicating that A and 2B are in the on-air tally state is transmitted to and displayed on the first and second centralized control consoles 1A and 1B, and switching selection for the on-air tally state is prohibited,
It is possible to reliably prevent adjustment operations on the camera during on-air.

In addition, in the above embodiment, two central adjustment consoles 1
A, 1B and two cameras 2A, 2B have been shown, but this is just an example to simplify the explanation and make it easier to understand.In an actual system, the central adjustment consoles 1A, 1B It is customary to include at least two or more cameras _2A and 2B, and _several to several dozen cameras.
It goes without saying that the same implementation can be achieved by simply increasing the number of switches b, the number of contacts of the switch control circuit 15 of the switcher 12, and the number of time division switches 16.

Further, in the above embodiment, the switcher 1
The two data transmitter/receivers 13 are time-divisionally connected to the respective centralized control consoles 1A and 1B by the time-division switch 16.
I am trying to monitor control data from
A plurality of data transceivers 13 may be provided without using the time division switch 16.

Further, the control data for the cameras 2A and 2B may be in either a serial or parallel format, or data in a mixed serial/parallel format, and the present invention can be implemented using any of the data. Almost the same effect can be expected.

As explained above, according to the present invention, since it is possible to install two or more central adjustment consoles, it is possible to perform central remote adjustment of a plurality of different cameras at the same time, while eliminating the drawbacks of the conventional technology. Even if there are a large number of cameras, you can complete the adjustment of all cameras in a relatively short time, and you can adjust the cameras arbitrarily from different locations. It is also possible to provide a highly reliable television camera control device that does not cause defects in camera adjustment.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a conventional example of a television camera control system capable of central adjustment, and FIG. 2 is a block diagram showing an embodiment of a television camera control device according to the present invention. 1A, 1B... Central control console, 2A, 2B... Television camera, 12... Switcher, 13
...Data transceiver, 14...Memory, 15...
Switch control circuit, 16... time division switch.

Claims (1)

[Scope of Claims] 1. A control device for a television camera which includes a plurality of television cameras and a switching device, and which centrally performs remote adjustment using a common adjustment device. A data transmission means is provided for transmitting and receiving data between each of the adjusting devices and the switching device, and each of the plurality of adjusting devices can independently adjust all of the television cameras. A control device for a television camera, characterized in that it is configured as follows. 2. In claim 1, the plurality of television cameras are provided with data holding means for receiving and holding adjustment data, and the plurality of television cameras are controlled by the data held in the data holding means. A control device for a television camera, characterized in that the control device is configured to set operating conditions for each camera. 3. In claim 1 or 2, any one of the plurality of television cameras mentioned above
1. A control device for a television camera, comprising: means for prohibiting simultaneous access by a plurality of adjustment devices to one adjustment device; and means for displaying information on adjustment devices whose access is prohibited by the means. 4. In any one of claims 1 to 3, there is provided means for prohibiting any one of the plurality of adjustment devices described above from accessing a television camera in an on-air tally state, and displaying the same on the adjustment device. What is claimed is: 1. A control device for a television camera, comprising means for controlling a television camera.