JP2022155545A - video display system - Google Patents

Abstract

To provide a video display system that does not generate delays and video clogging in a video display device 50 even when video signals from a plurality of cameras 11 to 18 with different output video signal bit rates, frame rates, angles of view, etc. are transmitted to the video display device.SOLUTION: Video compression devices 21 to 28 are arranged on the camera side of communication lines 31 to 38, a signaling server 40 designates the total bit rate for a video display device 50, and the signaling server 40 instructs the video compression devices 21 to 28 on the compression rate such that the bit rate of a video signal after compression becomes the bit rate obtained by dividing the total bit rate by the number of cameras. Then, the signaling server 40 may dynamically instruct the video compression devices 21 to 28 on the compression rate on the basis of the magnitude of the audio signals picked up by the cameras 11 to 18 and the amount of tipping money.SELECTED DRAWING: Figure 2

Description

The present invention relates to a system for displaying a plurality of images captured by a plurality of cameras on a single large image display device at a conference, a wedding hall, or the like.

2. Description of the Related Art Conventionally, a plurality of images captured by a plurality of cameras have been displayed on a single large image display device at conferences, wedding halls, and the like.

Japanese Patent Application Laid-Open No. 2003-331073

However, the bit rate, frame rate, angle of view, etc. of output video signals from multiple cameras are usually different for each camera. Sometimes the image was jammed and not displayed properly.

FIG. 1 is a diagram showing an example of a conventional image display system.
1 is a conventional image display system. 11-18 are a plurality of cameras. 31 to 33 are a plurality of communication lines. 50 is a large image display device.
The plurality of cameras 11 to 18 have different bit rates of output video signals. That is, the bit rate of the output video signal of camera 11 is 15 Mbps. The bit rate of the output video signal of camera 12 is 8 Mbps. The bit rate of the output video signal of camera 13 is 5 Mbps. The bit rate of the output video signal of camera 14 is 4 Mbps. The bit rate of the output video signal of camera 15 is 20 Mbps. The bit rate of the output video signal of camera 16 is 3 Mbps. The bit rate of the output video signal of camera 17 is 2 Mbps. The bit rate of the output video signal of the camera 18 is 1 Mbps.
If the output video signal of each camera is input to the video display device 50 as it is, a delay or image clogging will occur when displaying the video, and the display will not be performed normally.

Even if the bit rate, frame rate, angle of view, etc. of the output video signals of a plurality of cameras differ from camera to camera, the present invention is capable of combining a plurality of videos captured by a plurality of cameras into a single large-sized video camera. It is an object of the present invention to provide a video display system capable of displaying normally on a video display device.
Another object of the present invention is to provide a video display system capable of dynamically changing the compression rate of the video compression device on the camera side according to the signal transmitted from each camera to the signaling server.

The inventors of the present invention convert the output video signals of a plurality of cameras with different bit rates into a plurality of output video signals with the same bit rate by a video compression device and transmit them, thereby reducing the delay and image clogging in the video display device. The inventors have found that the problem can be solved, and have completed the present invention.
In addition, the present inventors dynamically adjust the compression rate of the video compression device and the display size of the video from each camera on the video display device according to information such as audio signals and tips from multiple cameras. , found that it is possible to realize effective display of images, and completed the present invention.

[1] A video display system in which each of a plurality of cameras is connected to a video display device via each of a plurality of communication lines, wherein each of the plurality of video compression devices is arranged on the camera side of each communication line. 9. A video display system statically setting the compression rate of each video compression device according to each of a plurality of control signals transmitted from a signaling server to each video compression device.
[2] The video display system according to [1], wherein the compression rate is set so that a plurality of bit rates after compression of the video compression devices are equal.
[3] A video display system in which each of a plurality of cameras is connected to a video display device via each of a plurality of communication lines, wherein each of the plurality of video compression devices is arranged on the camera side of each communication line. 8. A video display system for dynamically setting the compression rate of each video compression device in accordance with each of a plurality of control signals transmitted from a signaling server to each video compression device.
[4] The image display of [3], wherein the plurality of control signals transmitted from the signaling server to each of the image compression devices are dynamically determined according to the signals transmitted from each of the cameras to the signaling server. system.
[5] The video display system according to [4], wherein the signals transmitted from each camera to the signaling server are audio signals.
[6] The image display system according to [4], wherein the signal transmitted from each camera to the signaling server is a signal representing the amount of tipping money.
[7] The video display system according to any one of [1] to [6], wherein the video display device adjusts the display size of the video from each camera according to the control signal from the signaling server.

According to the present invention, it is possible to eliminate delays and image blockages in image display devices.
Also, according to the present invention, by dynamically changing the display size of the video from each camera in the video display device, it is possible to effectively display the video.

1 is a diagram showing an example of a conventional image display system; FIG. It is a figure which shows the general view of the 1st Embodiment of this invention. 1 illustrates a first embodiment of the invention; FIG. 1 illustrates a first embodiment of the invention; FIG. 1 illustrates a first embodiment of the invention; FIG. Fig. 2 shows a second embodiment of the present invention;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 2 is an overall view of the first embodiment of the invention.
2 is the image display system of the first embodiment of the present invention. In the first embodiment of the present invention, video compression devices 21-28 are arranged immediately after the camera. The video compression devices 21 to 28 adjust the bit rates of the video signals after compression to be equal. 40 is a signaling server.

In the first embodiment, since the display capability of the video display device 50 is 8 Mbps, the video compression devices 21 to 28 are configured so that the bit rate of the video signal after compression by the video compression devices 21 to 28 is 1 Mbps. Each compression ratio is adjusted. Therefore, the compression rates of the video compression devices 21 to 28 are different values.
Note that the video compression device network information transmitted from the signaling server to the video compression devices 21 to 28 in FIG. 2 is information representing the location of the video display device 50 on the network.

Next, procedures for realizing the configuration shown in FIG. 2 will be described with reference to FIGS. 3 to 5. FIG.
In FIG. 3, in the first step, each of the video compression devices 21 to 28 accesses the signaling server 40 and transmits camera/network information to the signaling server 40 . This camera network information is information representing the locations of the cameras 11 to 18 in the network.
Next, in the second step, the signaling server 40 numbers the cameras connected to itself, generates display position information on the video display device 50 from the number of cameras ("8" in this example), and Send to 50.

In FIG. 4, in the third stage, the signaling server 40 associates the numbered cameras with the display positions. For example, the display position 1 is associated with the camera 11 . The linked camera (video compression device) and video display device 50 perform video communication by peer-to-peer (P2P) communication.

In FIG. 5, as the fourth step, the signaling server 40 designates the total bit rate (“8 Mbps” in this example) to the video display device 50 .
In the fifth stage, the signaling server 40 evenly distributes bitrates based on the total bitrate and the number of cameras connected to the video display device 50 . For example, if the total bit rate received by the video display device 50 is designated as 8 Mbps, and 8 cameras are connected, then 8 Mbps/8 = 1 Mbps, and the video signal of one camera is compressed to 1 Mbps, The data is transmitted to the video display device 50 .

In the first embodiment of the present invention, the bit rate is evenly distributed based on the total bit rate received by the video display device 50 and the number of cameras connected to the video display device 50. When displaying an image on the device 50, there is no problem that the display is not performed normally due to delay or image clogging.

(Second embodiment)
FIG. 6 is an explanatory diagram of the second embodiment of the present invention.
3 is the image display system of the second embodiment of the present invention. The first to third stages (FIG. 4) are the same as in the first embodiment.

As a fourth step, the cameras 11 - 18 transmit audio signals picked up by their microphones to the signaling server 40 .

In the fifth step, the signaling server 40 identifies the number of the camera that transmitted the loudest audio signal among the audio signals transmitted from the cameras 11 to 18, and expands the frame of the display portion corresponding to that number. A control signal to that effect is transmitted to the image display device 50 .
In the sixth stage, the signaling server 40 transmits a control signal to the video display device 50 to uniformly reduce the frames of the display portions corresponding to the numbers other than the number of the camera that transmitted the loudest audio signal.

In the seventh step, the signaling server 40 sends an output video signal with a bit rate (for example, "4 Mbps") matching the size of the enlarged frame to the video compression device of the camera that has transmitted the largest audio signal. Indicate the compression rate so that
In the eighth stage, the signaling server 40 applies a uniform bit rate (for example, "4 Mbps ÷ 7 = 571 bps (approximately 600 bps)") to the video compression devices of the cameras other than the camera that transmitted the largest audio signal. Specify the compression rate so that the output video signal is obtained.

By dynamically controlling the image display device 50 and the plurality of image compression devices 21 to 28 according to the audio signal in this manner, the face of the person speaking can be displayed in a large size.
In addition, instead of the audio signal, the video display device 50 and the plurality of video compression devices 21 to 28 can be dynamically controlled according to the signal representing the amount of the tip sent from the cameras 11 to 18 to the signaling server 40. , it becomes possible to display a large image of a person who has contributed a large amount of money.

Of course, the size of the frame of the display portion of the image display device 50 and the size of the frame of the image compression devices 21 to 28 are determined based on the signals transmitted from the cameras 11 to 18 to the signaling server 40, other than the audio signals and signals representing the amount of tipping money. may be dynamically controlled.

Although the present embodiment has been described above, the present invention is not limited to such a specific embodiment, and various modifications and changes are possible within the scope of the gist of the present invention described in the claims. is.

1 Conventional video display system 2 Video display system of the first embodiment of the present invention 3 Video display system of the second embodiment of the present invention 11-18 Cameras 21-28 Video compression device 31-38 Communication line 30 Signaling server 40 video display device

Claims (7)

A video display system connecting each of a plurality of cameras to a video display device via each of a plurality of communication lines,
arranging each of a plurality of video compression devices on the camera side of each communication line;
A video display system statically setting a compression rate of each video compression device according to each of a plurality of control signals transmitted from a signaling server to each video compression device. 2. The video display system according to claim 1, wherein said compression rate is set so that a plurality of bit rates after compression of said video compression devices are equal. A video display system connecting each of a plurality of cameras to a video display device via each of a plurality of communication lines,
arranging each of a plurality of video compression devices on the camera side of each communication line;
A video display system that dynamically sets the compression rate of each video compression device according to each of a plurality of control signals transmitted from a signaling server to each video compression device. 4. The video display system according to claim 3, wherein the plurality of control signals transmitted from the signaling server to each of the video compression devices are dynamically determined according to the signals transmitted from each of the cameras to the signaling server. 5. The video display system according to claim 4, wherein the signals transmitted from each camera to the signaling server are audio signals. 5. The image display system according to claim 4, wherein the signal transmitted from each camera to the signaling server is a signal representing the amount of tipping money. 7. The video display system according to any one of claims 1 to 6, wherein said video display device adjusts the display size of the video from each camera according to a control signal from said signaling server.

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