JP2019179965A - Video transmission processing device, method, program, and recording medium - Google Patents

Abstract

To provide a video transmission processing device that transmits a video signal received via a public line as a broadcast wave with high reliability.SOLUTION: A video transmission processing device 100 includes: a communication processing unit 141 that receives a video signal and terminal position information from each of a plurality of terminal devices via a public line; a determination unit 143 that determines whether there are two or more terminal devices whose terminal positions are within a predetermined range among the plurality of terminal devices on the basis of the terminal position information; and a conversion unit 145 that converts and outputs one or more video signals into a video signal format used for a broadcast wave signal among two or more video signals received from the two or more terminal devices on the basis of a determination result.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a video transmission processing apparatus, method, program, and recording medium.

  In general portable and mobile video transmission systems, large-scale equipment preparation such as a camera system and a portable transmitter or a relay vehicle for video transmission has been essential. For this reason, even if it is necessary to rush to the site for emergency response or the like, there is a problem that appropriate preparation is required, and it takes time to start and deploy the system from the local site.

  On the other hand, IP (Internet Protocol) networking of systems used in broadcasting stations has been promoted, and video data posted to a video sharing service can be used as video material for broadcasting. By using such video data, an environment in which video can be provided to viewers and the like without using the portable and mobile video transmission system described above is being prepared. For this reason, in broadcasting stations, technical collateral is provided for broadcasting video material distributed in real time from a terminal device via a public line in real time.

  For example, Patent Document 1 discloses a system that distributes information that is input and transmitted from a wireless communication terminal and / or a wired communication terminal at least in real time on a television.

  Patent Document 2 discloses converting a camera image received via a wireless communication network into a signal for terrestrial digital television broadcasting.

JP 2002-026842 A JP2013-111402A

  However, the transmission of video signals via public lines is more difficult than the above-described portable and mobile video transmission systems, for example, when the transmission quality of the video signals fluctuates and the image is significantly degraded or the video display is interrupted. There was a problem in terms of reliability.

  An object of the present invention is to provide a video transmission processing apparatus, method, program, and recording medium that enable a video signal received via a public line to be transmitted to a broadcast wave with high reliability.

  The video transmission processing device according to the present invention includes a communication processing unit that receives a video signal and terminal location information from each of a plurality of terminal devices via a public line, and the plurality of terminals based on the terminal location information. Among the devices, a determination unit that determines whether there are two or more terminal devices whose terminal positions are within a predetermined range, and two or more received from each of the two or more terminal devices based on a result of the determination A conversion unit that converts one or more of the video signals into a video signal format used for a broadcast wave signal and outputs the video signal format.

The method of the present invention includes receiving a video signal and terminal location information from each of a plurality of terminal devices via a public line, and, based on the terminal location information, out of the plurality of terminal devices. It is determined whether there are two or more terminal devices whose positions are within a predetermined range, and one of two or more video signals received from each of the two or more terminal devices based on the determination result, 1 Converting the above video signal into a video signal format used for a broadcast wave signal and outputting it;
including.

  The program of the present invention receives a video signal and terminal location information from each of a plurality of terminal devices via a public line, and, based on the terminal location information, out of the plurality of terminal devices. It is determined whether there are two or more terminal devices whose positions are within a predetermined range, and one of two or more video signals received from each of the two or more terminal devices based on the determination result, 1 This is a program for causing a processor to convert the above video signal into a video signal format used for a broadcast wave signal and output it.

  The recording medium of the present invention receives a video signal and terminal location information from each of a plurality of terminal devices via a public line, and based on the terminal location information, among the plurality of terminal devices, It is determined whether there are two or more terminal devices whose terminal positions are within a predetermined range, and based on a result of the determination, out of two or more video signals received from each of the two or more terminal devices, This is a non-transitory recording medium that can be read by a computer in which a program for causing a processor to execute conversion of one or more video signals into a video signal format used for a broadcast wave signal and output the same.

  According to the present invention, a video signal received via a public line can be transmitted as a broadcast wave with high reliability. In addition, according to this invention, another effect may be show | played instead of the said effect or with the said effect.

FIG. 1 is an explanatory diagram showing an example of a schematic configuration of a system 1 according to an embodiment of the present invention. FIG. 2 is a block diagram illustrating an example of a schematic configuration of the video transmission processing apparatus 100 according to the first embodiment. FIG. 3 is a diagram for explaining the flow of the authentication process performed in the example of the first embodiment. FIG. 4 is a diagram for explaining a flow of transmission processing for a plurality of video signals transmitted from each of the plurality of terminal devices 200. FIG. 5 is a diagram showing an example of a screen used when the video editor confirms the video on the broadcast station (video transmission processing apparatus 100) side. FIG. 6 is a block diagram illustrating an example of a schematic configuration of the video transmission processing apparatus 100 according to the second embodiment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the present specification and drawings, elements that can be similarly described are denoted by the same reference numerals, and redundant description may be omitted.

The description will be made in the following order.
1. Outline of Embodiment of the Present Invention 2. System configuration First embodiment 3.1. Configuration of video transmission processing apparatus 100 3.2. Technical features 3.3. Example 3.4. Effect 4. Second Embodiment 4.1. Configuration of video transmission processing apparatus 100 4.2. Technical features 5. Other forms

<< 1. Outline of Embodiment of the Present Invention >>
First, an outline of an embodiment of the present invention will be described.

(1) Technical issues In general portable and mobile video transmission systems, large-scale equipment preparation such as a camera system and a portable transmitter or a relay vehicle for video transmission has been essential. For this reason, even if it is necessary to rush to the site for emergency response or the like, there is a problem that appropriate preparation is required, and it takes time to start and deploy the system from the local site.

  On the other hand, IP (Internet Protocol) networking of systems used in broadcasting stations has been promoted, and video data posted to a video sharing service can be used as video material for broadcasting. By using such video data, an environment in which video can be provided to viewers and the like without using the portable and mobile video transmission system described above is being prepared. For this reason, in broadcasting stations, technical collateral is provided for broadcasting video material distributed in real time from a terminal device via a public line in real time.

  However, the transmission of video signals via public lines is more difficult than the above-described portable and mobile video transmission systems, for example, when the transmission quality of the video signals fluctuates and the image is significantly degraded or the video display is interrupted. There was a problem in terms of reliability.

  An object of the present embodiment is to provide a video transmission processing apparatus that enables a video signal received via a public line to be transmitted to a broadcast wave with high reliability.

(2) Technical features In the embodiment of the present invention, for example, the video transmission processing device receives a video signal and terminal location information from each of a plurality of terminal devices via a public line, and the terminal location information Based on the above, it is determined whether there are two or more terminal devices having a terminal position within a predetermined range among the plurality of terminal devices, and from each of the two or more terminal devices based on the result of the determination Among the two or more received video signals, one or more video signals are converted into a video signal format used for a broadcast wave signal and output.

  Thereby, for example, a video signal received via a public line can be transmitted to a broadcast wave with high reliability. The technical features described above are specific examples of the embodiments of the present invention, and the embodiments of the present invention are naturally not limited to the technical features described above.

<< 2. System configuration >>
With reference to FIG. 1, the example of a structure of the system 1 which concerns on embodiment of this invention is demonstrated. FIG. 1 is an explanatory diagram showing an example of a schematic configuration of a system 1 according to an embodiment of the present invention. Referring to FIG. 1, the system 1 includes a video transmission processing device 100 and a plurality of terminal devices 200.

  In the system 1, for example, a video signal captured by the terminal device 200 is transmitted to the video transmission processing device 100 via the public line 10, and is further transmitted as a broadcast wave from the video transmission processing device 100 via the broadcasting antenna 20. Is done.

  The video transmission processing apparatus 100 is an apparatus mounted on one or more server computers provided as broadcasting equipment in a broadcasting station, for example. Moreover, the terminal device 200 is a portable terminal (for example, a smart phone etc.) provided with the imaging function which can image a moving image, for example. Further, the public line 10 (network network) from the terminal device 200 to the video transmission processing apparatus 100 (broadcast station) is, for example, an existing network network (hereinafter referred to as a public line) provided by a communication carrier.

<< 3. First Embodiment >>
Subsequently, a first embodiment of the present invention will be described with reference to FIGS.

<3.1. Configuration of Video Transmission Processing Device 100>
Next, an example of the configuration of the video transmission processing apparatus 100 according to the first embodiment will be described with reference to FIG. FIG. 2 is a block diagram illustrating an example of a schematic configuration of the video transmission processing apparatus 100 according to the first embodiment. Referring to FIG. 2, the video transmission processing apparatus 100 includes a network communication unit 110, a broadcast wave transmission unit 120, a storage unit 130, and a processing unit 140.

(1) Network communication unit 110
The network communication unit 110 receives a signal from the network (for example, the public line 10) and transmits a signal from the network (for example, the public line 10). For example, the network communication unit 110 receives a signal from the terminal device 200 and transmits a signal to the terminal device 200.

(2) Broadcast wave transmission unit 120
The broadcast wave transmission unit 120 transmits a broadcast wave including the video signal via the broadcast antenna 20 by performing predetermined modulation processing or the like on the video signal.

(3) Storage unit 130
The storage unit 130 temporarily or permanently stores programs (commands) and parameters for the operation of the video transmission processing apparatus 100 and various data. The program includes one or more instructions for the operation of the video transmission processing apparatus 100.

(4) Processing unit 140
The processing unit 140 provides various functions of the video transmission processing apparatus 100. The processing unit 140 includes a communication processing unit 141, a determination unit 143, and a conversion unit 145. The processing unit 140 may further include other components other than these components. That is, the processing unit 140 can perform operations other than the operations of these components. Specific operations of the communication processing unit 141, the determination unit 143, and the conversion unit 145 will be described in detail later. For example, the processing unit 140 (communication processing unit 141) communicates with the terminal device 200 via the network communication unit 110.

(5) Implementation Example The network communication unit 110 may be implemented by a network adapter and / or a network interface card. The broadcast wave transmission unit 120 may be implemented by a radio frequency (RF) circuit or the like. The storage unit 130 may be implemented by a memory (for example, a nonvolatile memory and / or a volatile memory) and / or a hard disk. The processing unit 140 may be implemented by one or more processors such as a baseband (BB) processor and / or other types of processors. The communication processing unit 141, the determination unit 143, and the conversion unit 145 may be implemented by the same processor, or may be separately implemented by different processors. The memory (storage unit 130) may be included in the one or more processors, or may be outside the one or more processors.

  The video transmission processing apparatus 100 may include a memory that stores a program (instruction) and one or more processors that can execute the program (instruction). The one or more processors may execute the above-described program to perform the operation of the processing unit 140 (operation of the communication processing unit 141, the determination unit 143, and / or the conversion unit 145). The program may be a program for causing a processor to execute the operation of the processing unit 140 (the operation of the communication processing unit 141, the determination unit 143, and / or the conversion unit 145).

<3.2. Technical features>
Next, technical features of the first embodiment will be described.

  The video transmission processing device 100 (communication processing unit 141) receives a video signal and terminal position information from each of a plurality of terminal devices (for example, the terminal device 200) via the public line 10. Then, the video transmission processing device 100 (determination unit 143), based on the terminal position information, among the plurality of terminal devices (for example, the terminal device 200), two or more terminal devices whose terminal positions are within a predetermined range. It is determined whether there is (for example, the terminal device 200). Then, the video transmission processing device 100 (the conversion unit 145), based on the determination result, out of one or more video signals received from each of the two or more terminal devices (for example, the terminal device 200). The video signal is converted into a video signal format used for a broadcast wave signal and output to the broadcast wave transmission unit 120, for example.

(1) Terminal position information For example, the terminal position information is information (latitude information and longitude information) related to the current position that can be acquired by the terminal device 200 using, for example, a position information acquisition function based on GPS. In addition, when there are two or more terminal devices (for example, the terminal device 200) whose terminal position is within a predetermined range, specifically, there are two or more terminal devices 200 at substantially the same position. Say.

(2) Conversion of Video Signal The video transmission processing device 100 (the conversion unit 145) receives 2 received from each of the two or more terminal devices whose terminal positions are within the predetermined range based on the determination result. Among the above video signals, for example, one video signal having the highest video quality is converted into a video signal format used for a broadcast wave signal and output.

In addition, the video transmission processing device 100 (the conversion unit 145) determines two or more of the video signals received from the two or more terminal devices whose terminal positions are within the predetermined range based on the determination result. May be converted into a signal format used for the broadcast wave signal and output. That is, for example, two or more video signals imaged at the same position may be included in the broadcast wave signal.

-Signal format The video signal received from each of the two or more terminal devices (for example, the terminal device 200) via the public line 10 is, for example, an IP (Internet Protocol) signal. The video signal format used for the broadcast wave signal is, for example, a video signal format according to the SDI (Serial Digital Interface) standard.

(3) Security Assurance For example, the video transmission processing device 100 (determination unit 143) may further determine whether each of the two or more terminal devices is a predetermined registered terminal device. In this case, when each of the two or more terminal devices is the predetermined registered terminal device, the video transmission processing device 100 (conversion unit 145) receives the 2 received from each of the two or more terminal devices. Among the above video signals, one or more video signals are converted into a video signal format used for a broadcast wave signal and output.

<3.3. Example>
Next, an example according to the first embodiment will be described.

  FIG. 3 is a diagram for explaining the flow of the authentication process performed in the example of the first embodiment. For example, the DB server 310 (DATABASE) server, the authentication server 320, the AP server 330 (Application) server, and the RT communication server 340 are each connected to the intra-station communication network 300 provided in the broadcast station, and each of the above-described video transmission processes. It assumes various functions of the device 100. The operation of each server described above is controlled by, for example, the operator 350.

  First, the terminal device 200 performs user registration and terminal registration in advance in order to use a dedicated application program when establishing communication with a broadcasting station (video transmission processing device 100). Here, management of registration data is performed by the DB server 310 server that plays a role of one function of the determination unit 143. Further, the authentication process performed when the dedicated application program is started is performed by the authentication server 320 serving as one function of the determination unit 143.

  Subsequently, after communication is established between the broadcasting station (video transmission processing device 100) and the terminal device 200, an AP server 330 that plays a role of the communication processing unit 141, and an application executed by the terminal device 200 Setting processing related to necessary information is performed with the program. Also, video transmission from the terminal device 200 to the video transmission processing device 100 is performed by the RT communication server 340 that plays a role of one function of the communication processing unit 141.

  FIG. 4 is a diagram for explaining a flow of transmission processing for a plurality of video signals transmitted from each of the plurality of terminal devices 200. In the example shown in FIG. 4, for example, in order to provide redundancy, video signals are transmitted from two terminal devices 200 carried by the same user to a broadcasting station (video transmission processing device 100) via the public line 10 in a total of two systems. An example is shown. More specifically, in FIG. 4, the terminal devices 200A and 200B transmit video signals captured by the same user in two systems. The terminal devices 200C and 200D also transmit video signals captured by the same user in two systems. The terminal devices 200E and 200F also transmit video signals captured by the same user in two systems.

  Further, the terminal device 200 can transmit terminal position information as described above. For this reason, the video transmission processing apparatus 100 can transmit broadcast waves including a plurality of video signals obtained by imaging one imaging target (subject) 400 as shown in FIG. 4 by a plurality of terminal apparatuses 200A-200F. Become. Further, as shown in FIG. 4, the broadcast wave may include terminal position information of each terminal device 200A-200F.

  For example, FIG. 5 is a diagram illustrating an example of a screen used when a video editor confirms a video on the broadcast station (video transmission processing apparatus 100) side. As shown in FIG. 5, when a video editor confirms video on the broadcast station (video transmission processing device 100) side, captured images at each site (each terminal device 200A-F), its position information, and It becomes possible to confirm the angle of view information on the same screen in a centralized manner. In particular, it is thought that by increasing the number of shooting points, such as aerial shooting from the sky with a drone or the like, the images can be combined in 3D to expand the range of video usage.

  In addition, the video transmission processing apparatus 100 can construct a mobile studio system that can be deployed in any place, not a sub-studio in the broadcast station, by unifying the interface with an existing transmission system in the broadcast station. In addition, it is possible to perform camera switching and the like from within the broadcasting station by using only a facility that can use a public line.

<3.4. Effect>
According to the present embodiment, by using a public line, it is possible to achieve responsiveness in an emergency, reduction of deployment time on site, and reduction of corresponding human resources. That is, in a system in which both a TV broadcasting station transmission system and a portable and mobile video transmission system are mixed, video and audio transmission using a public line such as a carrier line can be performed. Thus, it becomes possible to construct a real-time transmission system.

  In addition, according to the present embodiment, by sharing the interface with the existing subsystem, it can be used as a mobile subsystem, and remote operation such as switching of the camera viewpoint from the broadcasting station side is possible. Become.

  In addition, according to the present embodiment, since communication is performed between the application program (terminal device) and the server, the reception equipment is prepared on the broadcasting station side, so that the terminal device to be used is common and the video transmission destination. It is also possible to perform switching.

  In addition, according to the present embodiment, for example, transmission from underground where entry is difficult or utilization using a drone can be considered. In addition, by using a common protocol called IP (Internet Protocol), it is possible to directly distribute overseas.

<< 4. Second Embodiment >>
Subsequently, a second embodiment of the present invention will be described with reference to FIG. The first embodiment described above is a specific embodiment, but the second embodiment is a more generalized embodiment.

<4.1. Configuration of Video Transmission Processing Device 100>
First, an example of the configuration of the video transmission processing apparatus 100 according to the second embodiment will be described with reference to FIG. FIG. 6 is a block diagram illustrating an example of a schematic configuration of the video transmission processing apparatus 100 according to the second embodiment. Referring to FIG. 6, the video transmission processing apparatus 100 includes a communication processing unit 151, a determination unit 153, and a conversion unit 155. Specific operations of the communication processing unit 151, the determination unit 153, and the conversion unit 155 will be described later.

  The communication processing unit 151, the determination unit 153, and the conversion unit 155 may be implemented by the same processor, or may be separately implemented by different processors. The communication processing unit 151, the determination unit 153, and the conversion unit 155 may include a memory that stores a program (instruction) and one or more processors that can execute the program (instruction). The processor may perform operations of the communication processing unit 151, the determination unit 153, and the conversion unit 155. The program may be a program for causing the processor to execute the operations of the communication processing unit 151, the determination unit 153, and the conversion unit 155.

<4.2. Technical features>
Next, technical features of the second embodiment will be described.

  In the second embodiment, the video transmission processing device 100 (communication processing unit 151) receives a video signal and terminal position information from each of a plurality of terminal devices via a public line. Then, the video transmission processing device 100 (determination unit 153) determines, based on the terminal position information, whether there are two or more terminal devices whose terminal positions are within a predetermined range among the plurality of terminal devices. . Then, the video transmission processing device 100 (the conversion unit 155), based on the determination result, transmits one or more video signals among the two or more video signals received from each of the two or more terminal devices as broadcast wave signals. It is converted into a video signal format used for video and output.

  For example, the communication processing unit 151 may perform the operation of the communication processing unit 141 according to the first embodiment described above. The determination unit 153 may perform the operation of the determination unit 143 according to the first embodiment described above. Furthermore, the conversion unit 155 may perform the operation of the conversion unit 145 according to the first embodiment described above.

  The second embodiment has been described above. According to the second embodiment, for example, a video signal received via a public line can be transmitted to a broadcast wave with high reliability.

<< 5. Other forms >>
As mentioned above, although embodiment of this invention was described, this invention is not limited to these embodiment. Those skilled in the art will appreciate that these embodiments are merely exemplary and that various modifications can be made without departing from the scope and spirit of the invention.

  For example, the steps in the processing described in this specification are not necessarily executed in time series in the order described in the sequence diagram. For example, the steps in the processing may be executed in an order different from the order described as the sequence diagram or may be executed in parallel. Also, some of the steps in the process may be deleted, and additional steps may be added to the process.

  Also, a device (for example, a plurality of devices (or units) constituting a base station) including the components (for example, a communication processing unit, a determination unit, and / or a conversion unit) of the video transmission processing device described in this specification. One or more of the devices (or units) or modules for one of the plurality of devices (or units) may be provided. In addition, a method including processing of the above-described components may be provided, and a program for causing a processor to execute the processing of the above-described components may be provided. Moreover, a non-transitory recording medium (Non-transitory computer readable medium) readable by a computer that records the program may be provided. Of course, such a device, module, method, program, and computer-readable non-transitory recording medium are also included in the present invention.

  Part or all of the above embodiment can be described as in the following supplementary notes, but is not limited thereto.

(Appendix 1)
A communication processing unit that receives a video signal and terminal location information from each of a plurality of terminal devices via a public line;
A determination unit that determines whether there are two or more terminal devices having a terminal position within a predetermined range among the plurality of terminal devices based on the terminal position information;
A conversion unit that converts one or more video signals into a video signal format used for a broadcast wave signal out of two or more video signals received from each of the two or more terminal devices based on the determination result, and outputs the video signal format When,
A video transmission processing device comprising:

(Appendix 2)
Based on the result of the determination, the conversion unit converts two or more video signals from the two or more terminal devices whose terminal positions are within the predetermined range to the broadcast signal. The video transmission processing device according to attachment 1, wherein the video transmission processing device converts the signal format to be used and outputs the converted signal format.

(Appendix 3)
The determination unit further determines whether each of the two or more terminal devices is a predetermined registered terminal device,
When each of the two or more terminal devices is the predetermined registered terminal device, the conversion unit includes at least one of two or more video signals received from each of the two or more terminal devices. The video transmission processing device according to appendix 1 or 2, wherein the video signal is converted into a video signal format used for a broadcast wave signal and output.

(Appendix 4)
4. The video transmission processing device according to claim 1, wherein a video signal received from each of the two or more terminal devices via the public line is an IP (Internet Protocol) signal. 5.

(Appendix 5)
5. The video transmission processing apparatus according to any one of appendices 1 to 4, wherein a video signal format used for the broadcast wave signal is a video signal format according to an SDI (Serial Digital Interface) standard.

(Appendix 6)
Receiving a video signal and terminal location information from each of a plurality of terminal devices via a public line;
Determining whether there are two or more terminal devices having a terminal position within a predetermined range among the plurality of terminal devices based on the terminal position information;
Based on the result of the determination, converting one or more video signals of two or more video signals received from each of the two or more terminal devices into a video signal format used for a broadcast wave signal, and outputting the video signal format; ,
Including a method.

(Appendix 7)
Receiving a video signal and terminal location information from each of a plurality of terminal devices via a public line;
Determining whether there are two or more terminal devices having a terminal position within a predetermined range among the plurality of terminal devices based on the terminal position information;
Based on the result of the determination, converting one or more video signals of two or more video signals received from each of the two or more terminal devices into a video signal format used for a broadcast wave signal, and outputting the video signal format; ,
That causes a processor to execute.
(Appendix 8)
Receiving a video signal and terminal location information from each of a plurality of terminal devices via a public line;
Determining whether there are two or more terminal devices having a terminal position within a predetermined range among the plurality of terminal devices based on the terminal position information;
Based on the result of the determination, converting one or more video signals of two or more video signals received from each of the two or more terminal devices into a video signal format used for a broadcast wave signal, and outputting the video signal format; ,
A non-transitory recording medium readable by a computer having recorded thereon a program for causing a processor to execute.

  In a video signal transmission system, for example, a video signal received via a public line can be transmitted to a broadcast wave with high reliability.

1 System 100 Video Transmission Processing Device 141, 151 Communication Processing Unit 143, 153 Determination Unit 145, 155 Conversion Unit 200 Terminal Device

Claims (8)

A communication processing unit that receives a video signal and terminal location information from each of a plurality of terminal devices via a public line;
A determination unit that determines whether there are two or more terminal devices having a terminal position within a predetermined range among the plurality of terminal devices based on the terminal position information;
A conversion unit that converts one or more video signals into a video signal format used for a broadcast wave signal out of two or more video signals received from each of the two or more terminal devices based on the determination result, and outputs the video signal format When,
A video transmission processing device comprising:   Based on the result of the determination, the conversion unit converts two or more video signals received from the two or more terminal devices whose terminal positions are within the predetermined range into the broadcast wave signal. The video transmission processing apparatus according to claim 1, wherein the video transmission processing apparatus converts the signal format to be used and outputs the signal format. The determination unit further determines whether each of the two or more terminal devices is a predetermined registered terminal device,
When each of the two or more terminal devices is the predetermined registered terminal device, the conversion unit includes one or more video signals received from each of the two or more terminal devices. 3. The video transmission processing apparatus according to claim 1, wherein the video signal is converted into a video signal format used for a broadcast wave signal and output.   4. The video transmission processing device according to claim 1, wherein a video signal received from each of the two or more terminal devices via the public line is an IP (Internet Protocol) signal. 5.   5. The video transmission processing device according to claim 1, wherein a video signal format used for the broadcast wave signal is a video signal format according to an SDI (Serial Digital Interface) standard. 6. Receiving a video signal and terminal location information from each of a plurality of terminal devices via a public line;
Determining whether there are two or more terminal devices having a terminal position within a predetermined range among the plurality of terminal devices based on the terminal position information;
Based on the result of the determination, converting one or more video signals of two or more video signals received from each of the two or more terminal devices into a video signal format used for a broadcast wave signal, and outputting the video signal format; ,
Including a method. Receiving a video signal and terminal location information from each of a plurality of terminal devices via a public line;
Determining whether there are two or more terminal devices having a terminal position within a predetermined range among the plurality of terminal devices based on the terminal position information;
Based on the result of the determination, converting one or more video signals of two or more video signals received from each of the two or more terminal devices into a video signal format used for a broadcast wave signal, and outputting the video signal format; ,
That causes a processor to execute. Receiving a video signal and terminal location information from each of a plurality of terminal devices via a public line;
Determining whether there are two or more terminal devices having a terminal position within a predetermined range among the plurality of terminal devices based on the terminal position information;
Based on the result of the determination, converting one or more video signals of two or more video signals received from each of the two or more terminal devices into a video signal format used for a broadcast wave signal, and outputting the video signal format; ,
A non-transitory recording medium readable by a computer having recorded thereon a program for causing a processor to execute.

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