JPH09289636A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an easily handleable device by providing first and second display modes and generating display for synthesizer control on a monitor in the case that it is in the second display mode and an optional video transmission terminal is connected to a synthesizer. SOLUTION: In a video reception terminal 18, a camera control client 50 for remotelly controlling a camera 16 connected to a video transmission terminal 12 connected to a network 10 is installed. Also, a video reception software 52 for expanding compressed video data from the video transmission terminal 12 and displaying them on a monitor screen is installed as well. In the video reception terminal 18, a map management software 54 for displaying the arrangement positions of the respective cameras 16 and a present state on a map as camera symbols and displaying an operation panel for operating the respective cameras 16 is installed. The video reception software 52 is also a software for managing the cameras 16 connected to all the video transmission terminals 12 connected to the network 10.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a display device.

[0002]

2. Description of the Related Art Conventionally, a remote monitoring system using a plurality of cameras includes several video cameras, a synthesizer for synthesizing the images of those cameras, and a switcher called a switcher capable of freely selecting the images of arbitrary cameras. Consists of. These are mainly used in relatively small buildings and are called local surveillance systems. For such a local surveillance system, a plurality of cameras are connected to a LAN (local area network) or public digital line ISD.
A remote surveillance system has been proposed which connects to a digital network such as N and allows more flexible, more and more distant cameras to be connected.

[0003]

In some recent remote monitoring systems, a personal computer or workstation is used as a monitoring terminal, and a graphical user interface is used.
There is one that realizes image display and system control by an interface (GUI).

As a connection format to a personal computer or a workstation, there are cases where it is connected directly, and cases where it is connected through a switcher for switching a synthesizer for synthesizing images and a camera to be controlled. is there. The image synthesizer can select and display one of the cameras connected thereto, and can also display a plurality of these images side by side and display them simultaneously. In addition, it becomes possible to switch the camera to be controlled through the switcher.

However, it cannot be said that the operation unit for inputting a camera image through the switcher / combiner is sufficiently convenient, and there is room for improvement.

The present invention aims to solve the above-mentioned problems.

[0007]

In order to solve the above-mentioned problems, a first aspect of the present invention relates to a first display mode in which images from a plurality of video transmission terminals are simultaneously displayed on a monitor, and the plurality of video communications. A display device having a second display mode for displaying an image from any one video transmission terminal of the terminals on the monitor, wherein the display device is in the second display mode, and the one arbitrary video transmission terminal is combined. A display for controlling the synthesizer is generated on the monitor when connected to the monitor.

A second aspect of the invention is to provide a first display mode for simultaneously displaying images from a plurality of image transmitting terminals on a monitor.
A display device having a second display mode for displaying an image from any one image transmission terminal of the plurality of image communication terminals on the monitor, wherein the display device is in the second display mode, When the video transmission terminal is connected to the switcher, the display for controlling the switcher is generated on the monitor.

In a third aspect of the present invention, a first display mode in which images from a plurality of video transmission terminals are simultaneously displayed on a monitor and an image from any one video transmission terminal among the plurality of video communication terminals are displayed on the monitor. A display device having a second display mode for displaying, the video transmission terminal transmitting the video displayed on the monitor to the synthesizer regardless of the first display mode and the second display mode. When connected, a control instruction can be issued from the display for controlling the synthesizer on the monitor.

According to a fourth aspect of the present invention, a first display mode for simultaneously displaying images from a plurality of image transmitting terminals on a monitor and an image from any one image transmitting terminal of the plurality of image communication terminals is displayed on the monitor. A display device having a second display mode for displaying, wherein a video transmission terminal transmitting a video displayed on the monitor regardless of the first display mode or the second display mode is connected to a switcher. In this case, the control instruction can be issued from the display for controlling the switcher on the monitor.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing the overall schematic configuration of an embodiment of the present invention. Reference numeral 10 denotes a digital network for digitally transmitting video data and camera control information (including status information), to which n video transmission terminals 12 (12-1 to 12-n) are connected. A video camera 16 (16-1 to 16-n) is connected to each video transmission terminal 12 (12-1 to 12-n) via a camera control device 14 (14-1 to 14-n). There is. The camera control device 14 (14-1 to 14-n) includes the terminal 12 (1
2-1 to 12-n) controls the pan, tilt, zoom, focus, aperture, etc. of the connected video camera 16 (16-1 to 16-n). Also,
The video camera 16 (16-1 to 16-n) is supplied with power from the camera control device 14 (14-1 to 14-n), and the camera control device 14 receives the video camera 16 (in accordance with an external control signal). 16-1 to 16-n) power on /
It can be controlled off.

The network 10 also receives video information sent from the video transmission terminals 12 (12-1 to 12-n) to the network 10 and displays the video information (monitoring terminals) 18 (18-1 to 18-1). 18-m) are connected.
Each video receiving terminal 18 (18-1 to 18-m) has a monitor display (hereinafter abbreviated as monitor) 20 (20).
-1 to 20-m) are connected.

Video transmission terminal 12 (12-1 to 12-n)
Is connected to the video camera 16 (16-1 to 16-
The output video of n) is compressed by a predetermined compression method, and is transmitted to the video receiving terminal 18 of the video request source or all the video receiving terminals 18 via the network 10. The video receiving terminal 18, which has received the video, displays the received video in the video display area of the monitor 20. The video receiving terminal 18 is the network 1
0, various parameters (shooting direction, shooting magnification, focus, diaphragm, etc.) of the arbitrary camera 16 can be controlled via the video transmission terminal 12 and the camera control device 14 as well as power supply (on to off and off to on). . Details of these will be described later.

By providing a monitor on the video transmission terminal 12 and a video decompression device for decompressing a compressed video, the video transmission terminal 12 can be used as a video reception terminal. Similarly, by connecting the camera control device 14 and the video camera 20 to the video receiving terminal 18 and providing a video compressing device, the video receiving terminal 18 can be used as a video transmitting terminal. It goes without saying that it is necessary to equip the software necessary for video transmission or video reception.

FIG. 2 shows a schematic block diagram of a video transmission terminal to which the switcher and the synthesizer are not connected. 22
Is a CPU for controlling the whole, 24 is a main memory, 26 is a removable external storage device such as a floppy disk or CD-ROM, 28 is a secondary storage device such as a hard disk, 30 is a mouse as a pointing device,
Reference numeral 32 is a keyboard, 34 is an I / O board for connecting the camera control device 14 and transmitting / receiving a camera control signal, and 36 is a video capture device for capturing a video output signal of the video camera 16. The video capture device 36 of this embodiment has an A / D conversion function for converting an analog video signal into a digital signal and a video compression function for compressing information. Reference numeral 38 is a video board for displaying video information on the screen of the monitor 40, 42 is a network interface, and 44 is a system bus interconnecting the devices 22 to 38, 42.

When dedicated to image transmission, the video board 3
8 and the monitor 40 may be omitted.

As described above, the video transmission terminal is nothing but a computer. With the above configuration, the terminal 12 transmits the video to the remote monitoring terminal via the network, receives the camera control signal from the monitoring terminal, and receives the camera 16
Control.

FIG. 13 shows a schematic block diagram of a video transmission terminal to which a switcher and a synthesizer are connected.

In FIG. 2, one video camera is connected to one computer, but in this example, four camera control devices 14a to 14b and four video cameras are connected via the switcher 101 and the synthesizer 102. Cameras 16a-16
b is connected.

The synthesizer 102 will be described. Synthesizer 1
02 performs image synthesis on the analog moving image signals of the video cameras 16a to 16d as shown at 66a in FIG. Further, by sending a command from the computer to the synthesizer 102 through the switcher 101, the moving image signal from the video camera can be selectively displayed as shown at 66a in FIG.

The switcher 101 will be described. FIG.
In 3 different from FIG. 2, four camera control devices are connected. When the computer controls the video camera,
It is necessary to switch the camera control devices 14a to 14d to be controlled. The switcher 101 is a switching device for this purpose. Also, as described in the previous paragraph, the synthesizer 102
By sending a command to, the moving image signal from the video camera can be selected or combined and displayed.

FIG. 3 shows a schematic block diagram of the video receiving terminal (monitoring terminal) 18. 122 is a CP that controls the whole
U, 124 is a main memory, 126 is a removable external storage device such as a floppy disk or a CD-ROM, 12
8 is a secondary storage device such as a hard disk, 130 is a mouse as a pointing device, 132 is a keyboard, 138 is a video board for displaying video information on the screen of the monitor 140, 142 is a network interface, and 144 is a compressed video. A compression decoder 146 for decompressing information, and 146 are devices 122 to 132, 138, 14
It is a system bus that connects the two and 144 together.

The video receiving terminal 18 is shown in FIG. 2 except that it does not have the function of controlling the camera and taking in the camera video, the decoder 144 for expanding the compressed video, and the difference in system software. The configuration is the same as that of the video transmission terminal 12. Some or all of the video reception terminals 18 are video transmission terminals 1 that are allowed to perform arbitrary or camera control.
2 can send a camera control signal, and the video transmission terminal 12 that has received this camera control signal controls the camera 16 according to the content of the camera control signal, and
Returns the current state of the. The monitoring terminal displays the current status of the corresponding camera on the monitor according to the received status signal.
At the same time, the monitoring terminal receives the video data sent from the video sending terminal, decompresses it, and displays it on the monitor screen in real time.

FIG. 4 shows the software configuration of this embodiment. The video reception terminal (monitoring terminal) 18 includes a camera 16 connected to the video transmission terminal 12 connected to the network 10.
A camera control client (software) 50 for remotely controlling the camera, and video reception software 5 for decompressing compressed video data from the video transmission terminal 12 and displaying it on the monitor screen.
2, the position of each camera 16 and the current state are displayed as a camera symbol on the map, and each camera 16
The map management software 54 for displaying the operation panel for operating is installed.

The video reception software 52 is also software for managing the cameras 16 connected to all the video transmission terminals 12 connected to the network 10. The fixed information and various variable information (for example, cameras) of each camera 16 are also provided. Name, host name of the computer to which the camera 16 is connected, camera status such as pan / tilt and zoom, whether control is possible, which camera 16 is currently being controlled, and which camera 16 is displaying an image Etc.). These pieces of information are also supplied to the camera control client 50 and the map management software 54, and are used for changing the display of camera symbols.

The video transmission terminal 12 controls the camera 16 via the camera control device 14 in accordance with a request from the camera control client 50 and notifies the request source of the current state of the camera 16 and the camera control server 56. Video transmission software 58 for compressing the output video and transmitting it to the request source via the network 10 in a predetermined format is installed.

When the video camera 16 is controlled via the switcher 101 as shown in FIG. 13, the camera control server 5
6 sends a command for selecting a video camera to be controlled to the switcher to switch the camera control device to be controlled. After that, similarly, according to the request from the camera control client 50, the video camera is controlled via the switcher 101 and the camera control device 14.

FIG. 5 shows an example of display contents on the monitor screen of the video receiving terminal 18. Reference numeral 60 is a map window showing a layout of offices, stores, warehouses, etc. in which the cameras 16 are arranged, and a plurality of maps 60a, 60b, 60c, 6
0d can be switched. The number of maps 60a, 60b, 60c, 60d that can be displayed depends on the system performance and is not particularly limited. Each map 60a, 60
A tag is attached to each of b, 60c, and 60d. By clicking this tag with the mouse pointer, the map with the selected tag is displayed on the front. On the map displayed on the front side, camera icons (camera symbols) 62a, 62b, which indicate the cameras arranged therein,
62c and 62d are also displayed. Camera icon 62
a, 62b, 62c, and 62d are displayed in the direction in which the corresponding camera 16 is facing.

Reference numeral 64 denotes a plurality of image display areas 66a to 66f.
It is a video display window equipped with. In this embodiment,
It is obvious that the image display device has six image display areas, but is not limited thereto. The video display window 64 further displays a trash can icon 66g for an operation of stopping the display of the camera video during video display. How to use the trash can icon 66g will be described later.

Reference numeral 68 denotes a camera control panel, which is provided with buttons for operating the direction (pan / tilt) and zoom of the designated camera. In this embodiment, the power of the designated camera is turned on / off. A camera power button 70 for turning off is provided.

For example, in the map window 60, the map 60
When c is selected and displayed on the front, a map as shown in FIG. 6 is displayed, and camera icons 62e and 62f respectively showing the two cameras arranged therein are also displayed on the map.

Reference numeral 110 is a single image display mode button. When this button is clicked, a window is newly popped up, as shown by 111 in FIG. 16, and only the selected video is displayed as a moving image. By the instruction of the single video display mode button, the command to stop the video communication with other than the video transmission terminal transmitting the instructed video is notified to other than the video transmission terminal transmitting the instructed video. At the same time, an instruction command for frame rate improvement or resolution improvement is transmitted to the video transmission terminal that is transmitting the instructed video, in order to effectively utilize the free line capacity by stopping the video communication.

By the instruction of the single image display button,
Whether to send the frame rate improvement instruction command or the resolution improvement instruction command is determined by the initial setting set by the user.

Reference numeral 112 is a 4 video simultaneous display button, and 113 is a selection display button. These buttons are valid only when an image from an image transmitting terminal to which four video cameras are connected is selected by the synthesizer and switcher as shown in FIG. 66a of the video display window 64
It is assumed that the video displayed in is the video from the video transmission terminal as shown in FIG. When 66a is selected with the mouse, the 4 image simultaneous display button 112 and the selection display button 11
3 is valid.

For example, as shown in FIG. 14, of the four images displayed when the four images are simultaneously displayed, the lower right image is clicked. After that, when the selection display button 113 is clicked, an image as shown in FIG. 15 is obtained. Further, when 66a is clicked in the display state as shown in FIG. 15 and then the 4 video simultaneous display button 112 is clicked, a state as shown in FIG. 14 is obtained.

The camera control in this embodiment will be described in detail. If you want to display the image of a certain camera 16, click the camera icon showing the camera 16 on the map window 6
0 on the corresponding map, select the video display window 64
An operation (so-called drag and drop) of overlapping and separating any of the image display areas 66a to 66f is performed.
In addition, normally, the image display areas 66a to
66f is selected, but if the video display area in use is selected, the user is warned that the camera will be switched, and the user may be allowed to continue and stop. Such processing is well known. Note that the selected tags 60a-60d
In the above, if there is no camera with a switcher combiner, the above-mentioned 112 and 113 are not displayed. The presence or absence of the switcher synthesizer is identified by the video receiving terminal by exchanging the status between the video transmitting terminal displayed on the map and the video receiving terminal when the map is switched.

FIG. 7 shows the operation of dragging and dropping the camera icon 62c to the video display area 66c, and the video of the camera represented by the camera icon 62c is displayed in the video display area 66c. camera·
While dragging the icon, the mouse cursor
The shape is changed to that shown in FIG. 8, thereby indicating to the user that dragging for displaying an image is being performed. The map management software 54 notifies the video reception software 52 of the camera ID corresponding to the selected camera icon, and the video reception software 52 is connected with the camera direction, camera name, and camera from this ID. The host name is checked and the information is notified to the camera control client 50 and the map management software 54.

The camera control client 50 makes a network connection with the camera control server 56 of the video transmission terminal 12 to which the selected camera is connected, based on the information from the video reception software 52. After that, the camera control client 52 sends a camera control signal based on the user's operation,
Send to the camera control server 56 connected to the network,
The camera control server 56 controls the camera 16 according to the received camera control signal, and notifies the camera control client 52 of current information of the camera 16. The camera control client 52 notifies the video reception software 52 of the current information of the selected camera 16. The video reception software 52 stores the information in the map management software 54.
Notify also.

The map management software 54 changes the orientation of the camera icon so as to match the orientation of the corresponding camera 16, and displays the image of the selected camera icon as shown in FIG. A control pointer 74 for displaying pan / tilt and zoom in the scope 72 for displaying the scope 72 indicating that
Is displayed. As described above, the map management software 54 is constantly notified of the variation information (especially pan / tilt information) of the camera 16 during image display from the image reception software 52, and responds according to this information. The orientations of the camera icons 62a to 62f are changed so as to match the orientation of the camera.

FIG. 10 shows a flowchart of the processing for turning off the power of the camera 16 which is arbitrarily selected. When it is desired to temporarily turn off the power of the selected camera, the camera icon indicating the camera whose power is to be turned off is selected, and the camera power button 70 on the camera control panel 68 is pressed. The camera power button 70 is displayed in different colors and / or different characters (for example, “power off” or “power on”) according to the power status of the target camera. In response to the operation of the camera power button 70, the camera control client 52 notifies the camera power off request to the camera control server 56 of the video transmission terminal 12 connected to the corresponding camera 16 via the network 10 (S1).

The camera control server 56 uses the I / O board 34.
The camera control device 14 is controlled via the power supply to shut off the power supply to the corresponding video camera 10 (S2). On the other hand, the camera power button 70 is changed to a display mode indicating that the power is off (S3). This indicates to the operator that the power of the target camera is off.

When it is desired to supply power again to the camera that has been turned off, the camera power button 70 may be pressed again. Then, the camera power-on request is notified to the camera control server 56, and power is supplied to the corresponding video camera 16. Press the camera power button 70,
Change the color to indicate that the power is on.

In this way, the power supply of an arbitrary camera can be controlled from the monitoring terminal 18, and the power consumption can be reduced.

According to the video transmission request from the video reception software 52, the video transmission software 58 transmits the camera video. That is, the video receiving software 52 is transferred to the video transmitting software 58 of the video transmitting terminal 12 to which the selected camera is connected via the network 10.
Request transmission of video data for frames. In response to this request, the video transmission software 58 compresses the video data of the latest frame from the camera 16, divides it into packets, and transmits it to the requesting video reception software 52. The video reception software 52 reconstructs a frame from the received packet, expands the compression, and displays the video display area 66a ...
It is displayed in the previously designated area in 66f, and the video transmission request is issued again. By repeating this, the video receiving terminal 18 receives the camera image of the remote place via the network and displays it.

When displaying images from a plurality of cameras at the same time, issue an image transmission request and receive and display images to the image transmission software 58 of the image transmission terminal 12 connected to each camera. Repeat in order.

When changing the display position of the received camera image,
It can be done by drag and drop operation.
For example, when it is desired to change the image display area 66c to the image display area 66b, as shown in FIG.
6c, move the mouse pointer and press the mouse button, move the mouse pointer onto the video display area 66b while keeping the mouse button pressed, and release the mouse button on the video display area 66b. To do.

In response to such an operation, the video reception software 52 causes the video display area initially selected (see FIG. 11).
Then, the video display of the area 66c) is stopped, and the camera video displayed there is assigned to the video display area (area 66b in FIG. 11) selected later. The logical network connection is not disconnected even by this operation.

When it is desired to stop the video display, the video displayed in the video display area to be stopped may be put in the trash can icon 66g. In FIG. 12, the video display area 6
An example in which the display of the image displayed on 6c is stopped will be described. Move the mouse pointer over the image display area 66c and press the mouse button. With the mouse button still pressed, move the mouse pointer over the trash can icon 66g, and then move the mouse button over the trash can icon 66g. release.

In response to such an operation, the video reception software 54 causes the selected video display area (in FIG. 12, in FIG. 12).
The issuance of the video transmission request to the video transmission software 58 of the video transmission terminal connected to the camera which is displayed in the area 66c) is stopped. The video reception software 54 further notifies the camera control client 50 and the map management software 54 that the video display is stopped. In response to this notification, the camera control client 50 disconnects the network connection with the camera control server 56 of the corresponding video transmission terminal 12, and the video display area (area 66 in FIG. 12).
Clear c). Also, map management software 54
Is the applicable camera icon (eg icon 62
Clear the scope display in c) and update the map.

In this embodiment, a logical network connection between the video receiving terminal and the video transmitting terminal can be established by dragging and dropping the camera symbol on the map into the video display area. The video display position can be changed by dragging and dropping between the video display area where the camera video is displayed and another arbitrary video display area. The video display can be stopped by dragging and dropping from the video display area where the camera video is displayed to the display stop symbol. In this way, it becomes possible to very easily operate the start of display of the camera image, the change of the display position, and the stop of the display.

Next, the operation in the single image display mode will be described. Image display areas 66a to 66 using the mouse 30
When any one of f is designated and then the single image display mode button is clicked, the single image display window 111 is popped up as shown in FIG. 16, and the selected image is displayed.

Next, let us consider setting a single image display mode for an image from an image transmitting terminal to which four video cameras are connected via a synthesizer and a switcher as shown in FIG. The display image 66a in FIGS. 14 and 15 is a video from the video transmission terminal as shown in FIG.

When the single image display mode button 110 is clicked while the display shown in FIG.
A single image display window 111 as shown in 8 is popped up. Since this is an image from an image transmitting terminal to which four video cameras are connected via a synthesizer and a switcher, the single image display window 111 also has a four image simultaneous display button 112a and a selection display button 113.
a appears. At this time, when the mouse is clicked on the lower right image in FIG. 18 and then the selection display button 113a is clicked, an image as shown in FIG. 17 is displayed.

As for the display of FIG. 17, the frame rate is improved similarly to the image change at the time of changing to the single display mode.
The image is displayed as a visually good image in accordance with a command for improving the resolution.

When the single image display mode button 110 is clicked while the display as shown in FIG.
A single image display window 111 as shown in 7 pops up. Since this is an image from an image transmitting terminal to which four video cameras are connected via a synthesizer and a switcher, the single image display window 111 also has a four image simultaneous display button 112a and a selection display button 113.
a appears. At this time, use the mouse to display 4 images simultaneously 1
When 12a is clicked, an image in which four images are simultaneously displayed is displayed as shown in FIG.

In the present embodiment, even in the single image display mode, the video camera is switched to the 4th image through the synthesizer and the switcher.
Since it is possible to combine and display the images from the video transmission terminals connected to the stand, it is possible to combine and display the images without being aware of the single image display mode or the list image display mode. Selective display is possible.

[0058]

According to the inventions of claims 1 and 6, it is possible to easily identify whether the video transmission terminal transmitting the video being displayed is connected to the synthesizer switcher.

According to the second aspect of the present invention, the composition processing can be performed.

According to the inventions of claims 3 to 5 and 8 to 10, good visual display can be achieved.

According to the invention of claim 7, it is possible to switch the image.

According to the eleventh and thirteenth aspects of the present invention, it is possible to instruct the video composition switch when the video transmission terminal transmitting the video displayed on the monitor or the compositor / switcher is connected.

[Brief description of drawings]

FIG. 1 is an overall schematic block diagram of an embodiment of the present invention.

FIG. 2 is a schematic block diagram of a video transmission terminal 12 of this embodiment.

FIG. 3 is a schematic block diagram of a video receiving terminal (monitoring terminal) according to the present embodiment.

FIG. 4 is a schematic block diagram of software of the present embodiment.

FIG. 5 is a diagram showing an example of an image of the monitoring terminal of this embodiment.

FIG. 6 is a map window 6 with a map 60c displayed on the front.
It is a figure which shows the example of a display of 0.

FIG. 7 is an explanatory diagram of an operation of starting image display.

FIG. 8 is a diagram showing an example of the shape of a mouse cursor during a video display start operation.

FIG. 9 is a diagram showing a display mode example of a camera icon during image display.

FIG. 10 is a flowchart of power-off processing.

FIG. 11 is an explanatory diagram of an operation of changing a video display area.

FIG. 12 is an explanatory diagram of a video display stop operation.

FIG. 13 is a schematic block diagram of a video transmission terminal 12 to which a plurality of video cameras are connected via a combiner and a switcher in the present embodiment.

FIG. 14 is a diagram showing an example of a screen in a list video mode when a video from a video transmission terminal connected to a plurality of video cameras via a synthesizer and a switcher is synthesized and displayed.

FIG. 15 is a diagram showing a screen example in a list video mode when only one video image is selected and displayed from a video transmission terminal connected to a plurality of video cameras via a synthesizer and a switcher. .

FIG. 16 is a diagram showing an example of a screen when a single video display window pops up.

FIG. 17 is a diagram showing a screen example of a single video display mode when only one video image from a video transmission terminal connected to a plurality of video cameras via a synthesizer and a switcher is selectively displayed. is there.

FIG. 18 is a diagram showing an example of a screen in a single image display mode when images from an image transmitting terminal connected to a plurality of video cameras via a combiner and a switcher are combined and displayed.

Claims (14)

[Claims] 1. A first display mode for simultaneously displaying images from a plurality of image transmitting terminals on a monitor, and a first display mode for displaying an image from any one image transmitting terminal of the plurality of image communication terminals on the monitor. A display device having two display modes, wherein in the second display mode, when the arbitrary one video transmission terminal is connected to a synthesizer, the synthesizer control display is the monitor. A display device characterized by occurring on top. 2. The control instruction for the display for controlling the synthesizer causes the display in the second display mode to be a video from another video transmission terminal connected to the synthesizer and the arbitrary one video. The display device according to claim 1, wherein a multi-image display in which images from the transmission terminal are combined is displayed. 3. The display of the video from the arbitrary one video transmission terminal in the second display mode is larger than the display of the video from the plurality of video transmission terminals in the first display mode. The display device according to claim 1, wherein 4. The display of the video from the arbitrary one video communication terminal in the second display mode has a higher frame rate than the display of the video from the plurality of video transmission terminals in the first display mode. The display is a display.
The display device according to the above. 5. The display of the video from the arbitrary one video transmission terminal in the second display mode is more than the display of the video from the plurality of video transmission terminals in the first display mode.
The display device according to claim 1, wherein the display device has a high resolution. 6. A first display mode for simultaneously displaying images from a plurality of image transmitting terminals on a monitor, and a first display mode for displaying an image from any one image transmitting terminal of the plurality of image transmitting terminals on the monitor. A display device having two display modes, wherein in the second display mode, when the arbitrary one video transmission terminal is connected to a switcher, a display for the switcher control is displayed on the monitor. A display device characterized by being generated. 7. The display in the second display mode is switched to a video from another video transmission terminal connected to the switcher in accordance with a control instruction to the display for controlling the switcher. Item 6. A display device according to item 6. 8. The display of the video from the arbitrary one video transmission terminal in the second display mode is larger than the display of the video from the plurality of video transmission terminals in the first display mode. The display device according to claim 6, which is a display. 9. The display of the video from the arbitrary one video transmission terminal in the second display mode is more than the display of the video from the plurality of video transmission terminals in the first display mode.
7. The display device according to claim 6, wherein the display has a high frame rate. 10. The display of the video from the arbitrary one video transmission terminal in the second display mode has a higher resolution than the display of the video from the plurality of video transmission terminals in the first display mode. 7. The display device according to claim 6, wherein: 11. A first display mode for simultaneously displaying images from a plurality of video transmission terminals on a monitor and a second display mode for displaying an image from any one video transmission terminal of the plurality of video communication terminals on the monitor. A display device having a display mode of No. 1, wherein a video transmission terminal transmitting a video displayed on the monitor is connected to a synthesizer regardless of the first display mode and the second display mode. In this case, the display device is characterized in that a video composition control instruction can be given from the display for controlling the composition device on the monitor. 12. The display device according to claim 11, wherein the control instruction is a multi-image combination instruction of images generated by an image transmission terminal connected to the synthesizer. 13. A first display mode for simultaneously displaying images from a plurality of image transmitting terminals on a monitor and a second display mode for displaying an image from any one image transmitting terminal of the plurality of image communication terminals on the monitor. A display device having a display mode of, wherein a video transmission terminal transmitting a video displayed on the monitor is connected to a switcher regardless of the first display mode and the second display mode. A display device, which enables a video switching control instruction from a display for controlling the switcher on the monitor. 14. The display device according to claim 13, wherein the control instruction is an instruction to switch an image generated by an image transmission terminal connected to the switcher.