JP2021013086A - Image display system - Google Patents

Abstract

To provide an image display system that can determine whether a display is displayed normally by checking an image displayed on a transmitter even if an administrator does not have to go to see the display image at a remote location.SOLUTION: In an image display system that is separated into a transmitter unit 100 and a receiver unit 200, an image from the transmitter unit is displayed on a second display unit 213 of the receiver unit, and at the same time, a captured image captured just before the second display unit 213 is transmitted to the transmitter unit, and the captured image is displayed on a first display unit 113. This allows an administrator to determine whether the second display unit is displaying normally by checking the image displayed on the first display unit of the transmitter unit without having to go directly to see the image displayed on the second display unit 213 of the receiver unit.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to an image display system.

In recent years, many signage displays have been installed as electronic advertisements for commercial facilities. Display for signage is installed in various places to attract the attention of many people, and it is installed at various angles to increase the value of advertising. On the other hand, the signal source and transmitter for displaying on the display may be installed in a separate room far away, and the administrator who controls these devices often performs maintenance management in the separate room.

Patent Document 1 discloses a maintenance system for an image display device. This maintenance system includes a storage device that captures an image displayed on a screen and stores and displays the image data captured via a network in the storage device when an abnormality occurs in the image display device. As a result, when an abnormality occurs in the image display device, the cause can be quickly identified by checking the captured image.

JP-A-2002-207469

The present disclosure provides an image display system capable of confirming an image displayed by a receiving unit on a transmitting unit with a small number of constituent devices without using an imaging device.

The image display system in the present disclosure includes a transmitting unit, a receiving unit, and a communication line connecting them, and the transmitting unit encodes an image obtained from an image signal source into an IP signal and outputs the first to the communication line. It has an encoder, a first decoder that decodes an IP signal input from a communication line, and a first display unit that displays an image decoded by the first decoder, and the receiving unit inputs from the communication line. A second decoder that decodes the IP signal to be encoded, a second display unit that displays the image decoded by the second decoder, and an image capture unit that captures the image immediately before being input to the second display unit. A configuration including a captured image compression unit that compresses the image captured by the image capture unit and a second encoder that encodes the compressed captured image from the captured image compression unit into an IP signal, and the first decoder has a configuration. , The captured image obtained by decoding the compressed captured image obtained from the receiving unit is displayed on the first display unit.

The image display system in the present disclosure has an effect that an image displayed by a receiving unit located at a distant place can be confirmed by the transmitting unit with a small number of constituent devices without using an imaging device.

Block diagram showing the configuration of the image display system according to the first embodiment Block diagram showing the configuration of the image display system according to the second embodiment A flowchart for explaining the image comparison and the operation of the result in the second embodiment.

Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed explanation than necessary may be omitted. For example, detailed explanations of already well-known matters and duplicate explanations for substantially the same configuration may be omitted. This is to avoid unnecessary redundancy of the following description and to facilitate the understanding of those skilled in the art.

It should be noted that the accompanying drawings and the following description are provided for those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

(Embodiment 1)
Hereinafter, the first embodiment will be described with reference to FIG.

[1-1. Constitution]
FIG. 1 shows a schematic configuration diagram of an image display system according to the first embodiment of the present disclosure.

The transmitting unit 100 and the receiving unit 200 are connected via a network 300 capable of bidirectional data communication. In the network 300, an IP (Internet Protocol) signal obtained by packetizing data can communicate in both directions. A network is an example of a communication line.

The transmission unit 100 has a first encoder 111 that encodes an image obtained from the image signal source 101 into an IP signal and outputs the image to the network 300, and a first decoder 112 that decodes the IP signal input from the network 300 into an image. And a first display unit 113 for displaying an image.

The receiving unit 200 captures the image with the second decoder 211 that decodes the IP signal obtained from the network 300 into an image, the second display unit 213 that displays the image, and immediately before being input to the display unit. The image capture unit 212, the captured image compression unit 214 that compresses the image captured by the image capture unit, and the second encoder 215 that encodes the compressed captured image from the captured image compression unit into an IP signal are provided.

[1-2. motion]
The operation of the image display system configured as described above will be described below.

The case where the image obtained from the image signal source 101 is, for example, a moving image having a resolution of 1920 × 1080 and a frame rate of 60 fps will be described.

In the transmission unit 100, the first encoder 111 encodes the moving image obtained from the image signal source 101 into an IP signal and outputs it to the network 300. At this time, the IP signal is transmitted by setting the destination to the receiving unit 200.

In the receiving unit 200, the IP signal obtained from the network 300 is decoded into a moving image by the second decoder 211. By this decoding, the moving image is returned to the original moving image having a resolution of 1920 × 1080 and a frame rate of 60 fps. The moving image is displayed as a display on the second display unit 213, and at the same time, the image capturing unit 212 placed immediately before the second display unit 213 captures the moving image. The captured captured image is compressed by the captured image compression unit 214 to a low rate resolution and frame rate. Here, for example, the captured image after compression is described with a resolution of 480 × 270 and a frame rate of 15 fps. The compression ratio is 1/64 because the length is 1/4, the width is 1/4, and the frame rate is 1/4. The compressed capture image converted to a low rate is encoded into an IP signal by the second encoder 215, and the destination is output to the network 300 as the transmission unit 100.

In the transmission unit 100, the IP signal from the second encoder 215 obtained from the network 300 is decoded into a moving image by the first decoder 112. Here, the moving image returns to the image before encoding, and becomes a compressed capture image having a resolution of 480 × 270 and a frame rate of 15 fps. The compressed capture image is displayed on the first display unit 113.

[1-3. Effect, etc.]
As described above, in the present embodiment, the image obtained from the image signal source 101 is displayed on the second display unit 213 of the receiving unit 200 via the transmitting unit 100 and the network 300. At the same time, the image displayed on the second display unit 213 is captured immediately before being displayed, image-compressed, and displayed on the first display unit of the transmission unit 100 via the reception unit 200 and the network 300. ..

As a result, the same image as the image displayed on the second display unit 213 of the receiving unit 200 is displayed on the first display unit 113 of the transmitting unit 100. Therefore, even if the administrator does not go directly to see the image displayed on the second display unit 213 of the receiving unit 200, if the administrator confirms the image displayed on the first display unit of the transmitting unit 100, the second display unit The transmitter can determine whether the display is normally displayed and what kind of image is displayed.

Further, according to the present embodiment, it is not necessary to provide an image pickup device for capturing an image to be displayed on the second display unit, and it is possible to determine whether the second display unit is normally displaying with a small number of configurations. Have.

(Embodiment 2)
Hereinafter, the second embodiment will be described with reference to FIGS. The same components as those in the first embodiment are designated by the same reference numerals.

[2-1. Constitution]
FIG. 2 shows a schematic configuration diagram of an image display system according to an embodiment of the present disclosure.

The transmitting unit 100 and the receiving unit 200 are connected via a network 300 capable of bidirectional data communication. In the network 300, IP signals obtained by packetizing data can communicate in both directions.
The transmission unit 100 has a first encoder 111 that encodes an image obtained from the image signal source 101 into an IP signal and outputs the image to the network 300, and a first decoder 112 that decodes the IP signal input from the network 300 into an image. And a first display unit 113 for displaying an image. Up to this point, the configuration is the same as that of the first embodiment, but in the second embodiment, the following configuration is added to the transmission unit 100. That is, in the present embodiment, as a result of comparing the image obtained from the image signal source 101 with the image obtained by decoding the IP signal input from the network 300 by the comparison unit 114, it is determined that the two images are not similar. An alert display unit 115 for displaying an alert in case of a case is provided.

The receiving unit 200 has a second decoder 211 that decodes an IP signal obtained from the network 300 into an image, a second display unit 213 that displays an image, and an image capture that captures an image immediately before being input to the display unit. The unit 212 includes a captured image compression unit 214 that compresses the image captured by the image capture unit, and a second encoder 215 that encodes the compressed captured image from the captured image compression unit into an IP signal. As described above, the receiving unit 200 has the same configuration as that of the first embodiment.

[2-2. motion]
The operation of the image display system configured as described above will be described below.

The case where the image obtained from the image signal source 101 is, for example, a moving image having a resolution of 1920 × 1080 and a frame rate of 60 fps will be described.

In the transmission unit 100, the moving image is encoded into an IP signal by the first encoder 111 and output to the network 300. At this time, the IP signal is transmitted by setting the destination to the receiving unit 200.

In the receiving unit 200, the IP signal obtained from the network 300 is decoded into a moving image by the second decoder 211. The moving image decoded by the second decoder 211 is returned to the original moving image having a resolution of 1920 × 1080 and a frame rate of 60 fps. The decoded moving image is displayed as a display on the second display unit 213, and at the same time, the moving image is captured by the image capturing unit 212 placed immediately before the second display unit 213. The captured captured image is compressed by the captured image compression unit 214 to a low rate resolution and frame rate. Here, for example, the captured image after compression is described with a resolution of 480 × 270 and a frame rate of 15 fps. The compression ratio is 1/64 because the length is 1/4, the width is 1/4, and the frame rate is 1/4. The compressed capture image converted to a low rate is encoded into an IP signal by the second encoder 215, and the destination is output to the network 300 as the transmission unit 100.

The transmission unit 100 decodes the IP signal obtained from the network 300 into a moving image by the first decoder 112. Here, the moving image returns to the image before encoding, and becomes a compressed capture image having a resolution of 480 × 270 and a frame rate of 15 fps. This compressed capture image is displayed on the first display unit 113.

The operation up to this point is the same as that of the first embodiment. In the second embodiment, the following operations are added. The comparison unit 114 compares the image obtained from the image signal source 101 with the captured image obtained by decoding the IP signal input from the network 300, and displays an alert on the alert display unit 115 when it is determined that the two images are not similar. To do.

These operations will be described with reference to the flowchart of FIG.

The two images are compared in step (S114), and for the first image, the image from the image signal source 101 is input to the comparison unit 114 (S111). For the second image, a compressed capture image obtained by decoding the IP signal obtained from the network 300 by the first decoder 112 is input to the comparison unit 114 (S112). The two images are compared in step (S114), and if it is determined that they are not similar, the alert is turned on by the alert display unit 115 (S115), and if it is determined that they are similar, the alert is not turned on (S115). S116). After that, in any case, the process returns to step (S111) and the repeated operation is continued.

[2-3. Effect, etc.]
As described above, in the present embodiment, the image obtained from the image signal source 101 is displayed on the second display unit 213 of the receiving unit 200 via the transmitting unit 100 and the network 300. At the same time, the image displayed on the second display unit 213 is captured and image-compressed immediately before being displayed, and displayed on the first display unit 113 of the transmission unit 100 via the reception unit 200 and the network 300. ..

As a result, the same image as the image displayed on the second display unit 213 of the receiving unit 200 is displayed on the first display unit 113 of the transmitting unit 100.

Further, in the second embodiment, the image of the image signal source 101 and the compressed captured image are compared, and when it is determined that they are not similar, the alert is turned on.

Therefore, the administrator can determine whether or not the alert display unit 115 of the transmission unit 100 is lit without directly looking at the image displayed on the second display unit 213 of the reception unit 200. By confirming the image displayed on the display unit 113 of 1, the transmission unit can determine whether the second display unit is displaying normally and what kind of image is being displayed.

Further, in the present embodiment, it is not necessary to provide an imaging device for capturing an image of the second display unit, and there is an effect that it can be determined whether or not the second display unit is normally displaying with a small number of configurations.

(Other embodiments)
As described above, Embodiments 1 and 2 have been described as examples of the techniques disclosed in this application. However, the technique in the present disclosure is not limited to this, and can be applied to embodiments in which changes, replacements, additions, omissions, etc. have been made. It is also possible to combine the components described in the first and second embodiments to form a new embodiment.

Therefore, other embodiments will be illustrated below.

In the first and second embodiments, the first display unit 113 has been described as one of the configurations of the transmission unit 100. The display unit may be any display unit that can display and visually recognize an image, and can be replaced with a liquid crystal display, a video projector, or the like, and may be removed from the configuration of the transmission unit 100. A liquid crystal display can be easily obtained and configured on the market at a low cost.

The second display unit 213 has been described as one of the configurations of the receiving unit 200. This is also the same, as long as the display unit can display and visually recognize an image, it can be replaced with a liquid crystal display, a video projector, or the like, and there is no problem even if it is removed from the configuration of the receiving unit 200. A liquid crystal display can be easily obtained and configured on the market at a low cost.

A wireless LAN or a wired LAN is used as the network 300, but the network 300 is not limited to the network as long as it is a communication line capable of bidirectional data communication. For example, bidirectional communication such as optical fiber communication and USB is possible, but any method other than these that enables bidirectional communication can be replaced. Wired LANs are easily available on the market at low cost, technically capable of high-speed bidirectional packet communication, capable of transmitting and receiving high-definition images, and long-distance transmission and reception. It has the feature of being able to communicate.

Further, although the transmission unit 100 and the reception unit 200 connected to the network 300 have been described as one unit each, the number is not limited to one. A plurality of transmitters and receivers connected to the network may be connected.

In the first and second embodiments, the image resolution is 1920 × 1080 and the frame rate is 60 fps, but the present invention is not limited to these values. There is no problem with other resolution and frame rate values. Regarding image compression, the resolution and frame rate have been described as 1/4, but the values are not limited to these values. It may be 1/1 without compression, or 1/10 or 1/100. However, since the communicable capacity of the bidirectional communication network 300 is limited, it is better to secure a large amount of data capacity on the outbound route transmitted from the transmitting unit 100 to the receiving unit 200, and the receiving unit 200 receives the data to the transmitting unit 100. The data capacity of the return route should be small, and it is necessary to set the above compression value to an appropriate value in order to efficiently secure the performance within the limited communication capacity.

Since the above-described embodiment is for exemplifying the technique in the present disclosure, various changes, replacements, additions, omissions, etc. can be made within the scope of claims or the equivalent thereof.

The present disclosure is applicable to an image display system in which a transmitting unit and a receiving unit are separated and arranged. Specifically, the transmitting unit may be a device that encodes an image and transmits a communication signal, and the present disclosure can be applied to, for example, a switcher, a distributor, a scaler, a scan converter, a personal computer, and the receiving unit. Any device that decodes and displays an image may be used, and the present disclosure is applicable to, for example, a display, a video projector, a television, a monitor, a personal computer, a smartphone, and the like.

100 Transmitter 101 Image signal source 111 First encoder 112 First decoder 113 First display unit 114 Comparison unit 115 Alert display unit 200 Receiver 211 Second decoder 212 Image capture unit 213 Second display unit 214 Capture Image compression unit 215 Second encoder 300 network

Claims (2)

A transmission unit, a reception unit, and a communication line connecting the transmission unit and the reception unit are provided.
The transmitter
A first encoder that encodes an image obtained from an image signal source into an IP signal and outputs it to the communication line.
A first decoder that decodes the IP signal input from the communication line, and
It has a first display unit that displays an image decoded by the first decoder, and
The receiver
A second decoder that decodes the IP signal input from the communication line, and
A second display unit that displays an image decoded and input by the second decoder, and
An image capture unit that captures an image immediately before being input to the second display unit,
A captured image compression unit that compresses the image captured by the image capture unit, and
It has a second encoder that encodes the compressed captured image from the captured image compression unit into an IP signal.
The first decoder decodes the compressed captured image obtained from the receiving unit and displays the captured image obtained on the first display unit.
Image display system. The transmission unit further includes a comparison unit and an alert display unit.
The comparison unit compares the captured image obtained by the first decoder with the image obtained from the image signal source, and when it is determined from the comparison result that the images are not similar, the alert display unit alerts. The image display system according to claim 1, wherein the image is displayed.

Images