JPS586677A - Control system of television camera - Google Patents

Abstract

PURPOSE:To perform the centralized remote adjustment of plural cameras at the same time, by providing the cameras with a switcher, which includes a data transmitter and receiver and a switch control circuit, for at least two centralized control consoles. CONSTITUTION:Cameras 2A and 2B are provided with centralized control consoles 1A and 1B through a switcher 12. The data transmitter and receiver 13 of the switcher 12 sends a signal to a switch control circuit 15 to operate a time- division switch 16, thereby monitoring control data from the control consoles 1A and 1B on time-division basis. When a switching signal from the console 1A to the camera 2A is detected, switching data is sent to the circuit 15 to connect cables 81 and 82 together, and data on access from the console 1A to the camera 2A is written in a memory 14. At this time, the console 1B is operated and when the switching signal to the camera 2B is included in the control data, the console 1B is connected to the camera 2B through the time-division switch 16.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control system for a plurality of television cameras, which enables centralized remote adjustment using a common adjustment device.

TV Chiron camera, especially color TV Chiron camera (
(Hereinafter, simply referred to as a camera) etc., 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.
2) Since the H quality changes greatly, we have installed a number of regulators to adjust various gain, bias values, etc. to correct these changes, and adjust them as needed. It is common to have 9 straight holes.

In large cameras such as studio cameras, the number of adjusters for this purpose ranges from tens to hundreds, and each of them is attached to 11L on each circuit board. 1 In particular, when it comes to regulators that perform high-speed adjustment, a panel-shaped adjustment device called an adjustment table (hereinafter simply referred to as an adjustment table) is traditionally placed at a stop. It was designed to make adjustment work easier.

However, in conventional camera systems, this adjustment console is attached to each camera as a dedicated console, whereas the adjustment console is attached to each camera as if it were a camera that requires adjustment.
ft. It is necessary to select an accompanying adjustment console and make adjustments, and when cameras are used in television broadcasting stations, the adjustment work of the camera is extremely troublesome, and the cost of making adjustments is poor.

It had the disadvantage of becoming a space factor.

Therefore, in order to eliminate such drawbacks of the conventional technology, a single adjustment console is installed at a predetermined location, and this adjustment wheel is used to arbitrarily switch and select multiple cameras for centralized remote adjustment. A control system is proposed, an example of which is described with reference to FIG.

In the figure, 1 is a centralized control console, 2 &~2C are cameras, and 3
is a data transmitter/receiver, 4 is a memory, 5 is a digital-to-analog conversion circuit (CD/MU), and 6 is a flip 70 tube (FF
), 7 is a camera circuit, 80°88~8C is a control cable% 9 is a sophisticated changeover switch circuit (switcher) that switches between cables 8o and 8aN8c, 10 is a data receiving circuit, 11 is a switch control It is a circuit.

The central adjustment console 1 is an encoder for camera adjustment. It is equipped with a switch and a friend switch for selecting any one of all the cameras 2A to 2C included in this control system, and digitally replaces the adjustment data of the camera by these Kg. Cables 88 to 8 as camera control data and switched from cable 8o by switcher 9
It is transmitted to any one of the cameras 2A to 2C via any one of the cameras 2A to 2C.

Each of the cameras 2A to 2C accepts adjustment data using electrical signals from the D/A 5 and FF 6 instead of using various regulators and switches such as variable resistors that were conventionally provided for adjustment. , it is configured such that the operating conditions are set accordingly.

When the central control console 1 is accessed by the switcher 8 via the cables 81 to 8c'Y, the data K is received by the data transmitter/receiver 3, and the contents of the memory 4 are rewritten by the control data, and the data in the memory 4 and the data in the FF6 are The operating conditions are set depending on the state and the imaging operation is performed.

At this time, if the control data sent via the cables 8o e 8a to 8cY is 8 bits and 2 channels, then
As adjustment data, it is possible to transmit adjustment amounts consisting of 2.=256 variable ranges and data that allows selection of 256 types of adjustment items, which is sufficient for camera adjustment.

In this conventional example, the adjustment items are switched by the FF 6, and the output thereof is used to switch an electronic switch for switching the circuit, etc. Therefore, the number of FF 6 is provided as required depending on the adjustment item.

Switcher 9 connects to central control console 1 via cable 1lov
The receiving circuit 10 monitors the control data from the receiving circuit 10, and when a predetermined switching signal χ is received, the switch control circuit 11 is operated,
Close any one of contacts a, b, or c and connect cable aoY.
It serves to connect any of the cables 8a to 8C.

In the figure, contact a is closed, and control data from the centralized control console 1 is transmitted to the camera 2AK.

Therefore, according to the control system shown in FIG. 1, a plurality of cameras 1, for example, three cameras 2A, 2B, 2CY, can be arbitrarily selected at any time by a single centralized control console 1, as needed.
Since remote adjustment is possible, the cameras can be easily operated in a studio where many cameras are used, and the cameras can be operated under correct operating conditions at all times.

However, in the camera control system shown in Fig. 1, since there is only one central adjustment console 1, there are the following drawbacks: (1) The number of cameras that can be adjusted at the same time is limited to one. However, if there are many cameras in the system, 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 locations and adjust the camera from there.

(5) 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 enable camera adjustments to be made from any number of locations, while also allowing for centralized adjustment. To provide a camera control system that does not immediately make camera adjustment impossible even if a failure occurs in an adjustment console.

To achieve this objective, the present invention provides at least two central adjustment consoles in a control system having a large number of cameras, and allows them to independently adjust all the cameras. Features.

Hereinafter, a detailed Nt diagram of a control method for a television camera according to the present invention will be described.

FIG. 2 shows one implementation of the present invention, where fA and IB are the first and second
centralized control console, 2 people, 2B is a camera, 12 is a switcher, 113 is a data transmitter/receiver, 14 is a RAM (random
15 is a switch control circuit, and 16 is a time division switch. Note that 81 is the first
Cable between central control console 1A and switcher 12; 8. is also the cable from the second central adjustment wheel 1B, and the cable am e sb is the same as the conventional example shown in FIG. Also, the first and second central adjustment consoles 1 and 1B are the same as the central adjustment console 1 in the conventional MK shown in Figure 1, and the cameras 2 and 2B are also the same as cameras 2A and 2B in Figure 1. be.

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 16V, monitors the control data from the first central adjustment console 1A and the second central adjustment console 1B in a time division manner, and outputs a predetermined signal. Whether a switching signal is included or not.
For example, from the first central adjustment console 1A to the camera 2AK
When a switching signal for the switch is detected, K supplies predetermined switching data to the switch control circuit 15, closes the contact 1 as shown in the figure, and closes the cable 8. and 8m are connected.

At the same time, one person at the first central adjustment console
Data memory 14 indicating that AK is being accessed
Write it in.

Therefore, at this time, the first centralized adjustment console 1λ can be used to adjust the two cameras.

On the other hand, in this state, the first and second central adjustment consoles 1B are operated, and a switching signal for the camera 28 is included in the control data, which is assumed to be t.

This causes the data transmitter/receiver 13 via the time division switch centralized control console 1
M) After confirming that K is not being accessed, data is supplied to the switch control circuit 15, and the contact be t' is closed.

As a result, since the second centralized adjustment console 1B is connected to the camera 2BK, the camera 2B can be adjusted 1 from the second centralized adjustment console IBK, and the first and second adjustment consoles 1B and 1B
This allows adjustment operations for cameras 2A and 2B to be performed in parallel. It goes without saying that at this time, data indicating that the camera 2B is being accessed by the second centralized control console 1B is written from the data transmitter/receiver 13 to the memory 14.

On the other hand, in contrast to this case, when the first central adjustment wheel 1 is being accessed by the second central adjustment wheel 1B, the second central adjustment wheel 1B is operated, and the switching signal for the camera 2AK is included in the control data. Suppose that it is inserted into However, at this time, data indicating that the two cameras are being accessed by another central control console 1B is written in the memory 14, so the data transmitter/receiver 13 is transferred to the second central control console 1B. When the switch signal for camera 3AK is received from the camera 3AK and the memory 14 is checked, it is found that these two cameras are already being adjusted with another centralized adjustment console AK.
Predetermined data representing this is sent to the second central adjustment console IB.
K transmission 9 is returned, and data is not supplied to the switch control circuit 15.

Therefore, at this time, K is automatically prevented from double accessing the camera 2A by the second central adjustment console 18, and this central adjustment console IBK can be used by two people for the nine cameras currently selected to access the camera 2A. Since it is displayed that the adjustment is being made by the console 1k and access to it is being contested, the operator can be informed that the selection operation for the two cameras is an erroneous operation.

As a result, one person operates GT and the second centralized control console, and one person operates the IB, and the second contact point a, a operates, and one person operates the camera.
The contacts 1 and 2B operate to arbitrarily select each camera 2B, and the adjustment is made so that the two centralized control consoles 1 and 1B compete for access to the same camera at the same time. from.

Since there is no possibility of an erroneous operation, and the operator immediately understands that it is an erroneous operation, there is no need to repeat unnecessary operations or cause psychological burden to the operator.

Although 4IK was not shown in the above embodiment, camera 2
Since it is not desirable to perform adjustment operations for cameras 2A and 28 while they are on air, data indicating that these cameras 2A and 2B are on air tally is transmitted to the first and second central adjustment consoles 1A and 1B and displayed. If it is configured so that the switching selection yx@ for the on-air tally state is stopped.

It is possible to reliably prevent adjustment operations on the camera during on-air.

Also more than 1 IJ! In the example, two central adjustment consoles 1A,
I have shown a system consisting of IB, 2 cameras, 2 people, and 2B, but this is just an example to simplify and understand the Fi explanation, and in an actual system, there is only 1 central adjustment console and 2 IBs. Two or more cameras, two people,
Regarding 28, it is customary to implement it as including several to several dozen units, and in that case, cable 81*1lt
It goes without saying that the same implementation can be achieved by simply increasing the number of s81t8b, the number of contacts of the switch control circuit 15 of the switcher 12, and the number of time division switches 160.

Further, in the above embodiment, the data transmitter/receiver 13 of the switcher 12 is configured to monitor control data from each centralized control console 1B in a time-division manner using the time-division switch 16. , a plurality of data transceivers 13 may be provided without using the time division switch 1SV.

Further, the control data for the cameras 2M and 2B may be in either serial or parallel format, or data in a mixed serial/parallel format may be used to implement the present invention. We can expect the same effect as buried.

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 several different cameras at the same time, while eliminating the drawbacks of the prior art. This allows you to complete the adjustment of all cameras in a relatively short time even when there are a large number of cameras, and allows you to adjust the cameras arbitrarily from different locations. It is possible to provide a highly reliable control method for a television camera that does not cause problems due to improper adjustment of the camera even when an error occurs.

[Brief explanation of the drawing]

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 example of a control system for a television camera according to the present invention. lA, lB... Central adjustment console, 2A, 2B...
... Television camera, 12 ... Switcher 113 data transmitter/receiver, 14 ... Memory,
15...Switch plaster circuit, 16...
Time division switch 尤21￥I zd /9

Claims (2)

[Claims] (1) Equipped with multiple television cameras and a switching device,
A common adjustment device allows for centralized remote adjustment.
A control system for a television camera, which includes a plurality of adjustment devices and a precise data transmission means for transmitting and receiving data between each of the plurality of adjustment devices and the switching device, A control system for a television camera characterized in that it is structured so that all the adjustments of the television camera can be made independently each evening by the device. (2) In claim 1, data holding means for receiving and holding adjustment data is provided in the above-mentioned 1 [M TV SILON camera, and the data held by these data holding means is used to control the above-mentioned plurality of data using t data. A control method for a television camera, characterized in that the operating conditions for each of the television cameras are set. C) Claims! In Section 11 or Section 2, means for prohibiting simultaneous access of multiple *W devices to any one of the above-mentioned number of television cameras, and for an adjustment device whose access is prohibited by means of coughing. (4) A television camera in an on-air tally state according to any one of claims 1 to 3, A control system for a TV SILON camera, characterized in that means for prohibiting access by any one of the plurality of adjustment devices K to the adjustment device, and means for displaying the access on the adjustment device.