JP2021150813A - Ip broadcasting system, ip gateway device, management node device, client device, and method - Google Patents

Abstract

To provide a mechanism of realizing appropriate and efficient stream switching control in an IP broadcasting system network.SOLUTION: An IP broadcasting system includes at least one IP gateway 100b that operates as a receiver on an IP network and can perform IP-based message exchanges according to MIMO. The IP gateway 100b includes a storage unit 120 and a registration message generation unit 111. The storage unit 120 stores Receiver information including information on an operation mode of a device itself. The registration message generation unit 111 reads the Receiver information from the storage unit 120, and generates and transmits a registration message (IS-04 Registration) in which the Receiver information is described.SELECTED DRAWING: Figure 5

Description

The present invention relates to an IP broadcasting system, an IP gateway device, a management node device, a client device, and a method.

Many existing broadcast stations have dedicated networks for transmitting broadcast material such as video, audio and ancillary data within the station. Various devices such as a capture such as a camera and a microphone, a storage server for storing content data, a playback device for playing back content, and a gateway device for converting the format of a transmitted signal are connected to the dedicated network. SDI (Serial Digital Interface) has been widely used as a signal format for transmitting broadcast materials on a dedicated network.

However, as a result of the remarkable improvement in the performance of IP (Internet Protocol) technology in recent years, broadcasters have found the advantage of utilizing more versatile IP technology and are making efforts to update the network in the station to the IP network. Started. By adopting an IP-based network architecture, it is possible to construct a high-speed and large-capacity network at low cost by using network devices such as general-purpose routers and switches.

Standardization of protocols for transmitting broadcast materials using IP technology is currently underway. For example, SMPTE (Society of Motion Picture and Television Engineers) has standardized SMPTE ST2022-6, which is a protocol for transmitting SDI images, which are a mixture of video, audio, and auxiliary data, in IP packets (non-patent). See Document 1). Furthermore, SMPTE is also proceeding with the standardization of the SMPTE ST2110 series, which is a group of protocols for transmitting video, audio and auxiliary data in separate streams (see Non-Patent Document 2).

ARIB (Association of Radio Industries and Businesses), a standardization organization in Japan, has standardized ARIB STD-B73 as a data structure for transmitting video, audio, and auxiliary data in a single stream. (See Non-Patent Document 3).

Furthermore, with the progress of IP, it is expected that various devices will be connected to the network of the broadcasting station system. To ensure interoperability between such diverse devices, the AMWA (Advanced Media Workflow Association) is a set of control interface standards for managing and controlling stream transmission between devices, which is an NMOS (Networked Media). Open Specifications) Standards are being developed. For example, the NMOS IS-04 is a control interface standard for discovery and registration of network resources (see Non-Patent Document 4). IMS IS-05 is a control interface standard for device connection management (see Non-Patent Document 5).

Further, Patent Document 1 describes a technique in which a home router constituting an IP network converts a data format (MPEG, WMV, etc.) of notification broadcast data from a server into a data format that can be received by a terminal device. .. Further, Patent Document 2 describes a technique in which a media converter on a network converts a data format (MPEG2, etc.) of data sent from a server into a data format (MPEG4, etc.) that can be processed by a client and transmits the data. Has been done. Further, in Patent Document 3, when data is shared in a remote operation system, data having reproducible data information (or data identification information for specifying the data) is received from a plurality of remote operation devices. It describes techniques to prevent sharing of non-reproducible data.

Thomas Edwards, “SMPTE ST 2022: Moving Serial Interfaces (ASI & SDI) to IP”, [online], August 17, 2017, SMPTE Standards Webcast Series, [Search February 15, 2019], Internet <URL : Https://www.smpte.org/sites/default/files/2017-08-17-ST-2022-Edwards-V4-Handout.pdf SMPTE, “SMPTE ST 2110 FAQ”, [online], [Search on February 15, 2019], Internet <URL: https://www.smpte.org/st-2110> ARIB, “Data Structure Standard for Essence Independent Single Stream RTP Datagrams in Production IP Interfaces (ARIB STD-B73 1.0 Edition)”, [online], July 26, 2018, [February 15, 2019 Sun], Internet <URL: https://www.arib.or.jp/kikaku/kikaku_hoso/desc/std-b73.html> AMWA, “AMWA IS-04 NMOS Discovery and Registration Specification (Stable)”, [online], [February 15, 2019], Internet <URL: https://amwa-tv.github.io/nmos-discovery -registration /> AMWA, “AMWA IS-05 NMOS Device Connection Management Specification”, [online], [February 15, 2019], Internet <URL: https://amwa-tv.github.io/nmos-device-connection- management />

Japanese Unexamined Patent Publication No. 2005-229296 Japanese Unexamined Patent Publication No. 2002-152301 Japanese Unexamined Patent Publication No. 2010-004401

In an IP broadcasting system, a general-purpose network switch (for example, COTS (Commercial Off-The-Shelf)) is used for the IP router, so any broadcasting device compatible with the NMOS standard can be connected to the network for general purposes. .. That is, it is expected that various devices will be connected to the network of the IP broadcasting system.

However, it is not always guaranteed that the operating modes of the various devices that intend to transmit or receive the stream match each other between the transmitting side and the receiving side. If streams between devices whose operation modes (4K mode, 3G mode, HD mode, etc.) do not match are transmitted from the transmitting side to the receiving side, network resources are wasted and unexpected malfunctions on the receiving side occur. Can also be triggered. In particular, in NMOS, the transmission specifications of the operation mode between transmission and reception are undefined.

An object of the present disclosure is to provide a mechanism for realizing appropriate and efficient stream switching control in a network of an IP broadcasting system.

The IP broadcasting system disclosed in the present application includes at least one IP gateway device that operates as a receiver on an IP network and is capable of performing IP-based message exchanges in accordance with NMOS. The IP gateway device includes a first storage unit and a registration message generation unit. The first storage unit stores receiver information including information on the operation mode of the own device. The registration message generation unit reads the receiver information from the first storage unit, and generates and transmits a registration message in which the receiver information is described.

The IP gateway device disclosed in the present application can operate as a receiver on an IP network and perform IP-based message exchange according to an NMOS. Further, the IP gateway device includes a storage unit and a registration message generation unit. The storage unit stores receiver information including information on the operation mode of the own device. The registration message generation unit reads the receiver information from the storage unit, and generates and transmits a registration message in which the receiver information is described.

The management node device disclosed in the present application is a registration message in which at least one sender that transmits or discloses sender information including information on the operation mode of the own device and receiver information including information on the operation mode of the own device are described. Configure an IP broadcast system with at least one receiver to transmit. The management node device includes a storage unit and a registration unit. The sender information is stored as registration information in the storage unit. Each time the registration unit receives the registration message from a receiver connected to the IP network, the registration unit extracts the receiver information from the registration message and stores the receiver information as the registration information in the storage unit.

The client device disclosed in the present application transmits or publishes sender information including information on the operation mode of the own device according to NMOS, and transmits a registration message describing receiver information including information on the operation mode of the own device and at least one sender. A management node device that registers at least one receiver, the sender information, and the receiver information described in the registration message as registration information, and sends a notification message describing the registration information each time the registration information is registered. At the same time, it is an NMOS client device that constitutes an IP broadcasting system. The client device includes a storage unit, a registration unit, a comparison unit, and a control message generation unit. The registration information is stored in the storage unit. Each time the registration unit receives the notification message, the registration information is extracted from the notification message and the registration information is stored in the storage unit. When the comparison unit receives a stream switching instruction, the comparison unit obtains information on the operation mode of the sender, which is the source of the stream, and information on the operation mode of the receiver, which is the destination of the stream, based on the registration information. compare. The control message generation unit generates and transmits a control message for switching streams when the information of both operation modes matches as a result of comparison by the comparison unit.

The methods disclosed in the present application include a first transmission step in which at least one sender transmits or publishes sender information including information on the operating mode of the own device according to an NMOS, and at least one receiver of the operating mode of the own device. A second transmission step of transmitting a registration message in which receiver information including information is described and a management node device that manages transmission of at least one stream set up between the sender and the receiver are the sender information. Each time the management node device receives the registration message from a receiver connected to the IP network, the receiver information is extracted from the registration message and the receiver information is extracted. Includes a second registration step of registering as the registration information.

According to the IP broadcasting system, the IP gateway device, the management node device, the client device, and the registration method disclosed in the present application, appropriate and efficient stream switching control can be realized in the network of the IP broadcasting system.

FIG. 1 is a schematic view showing an example of the configuration of the IP broadcasting system 1 according to the embodiment of the present disclosure. FIG. 2 is a diagram showing an example of a logical configuration of the IP domain 10 of the IP broadcasting system 1 shown in FIG. FIG. 3 is an explanatory diagram showing an example of a registration message for registering an existing node transmitted using HTTP. FIG. 4 is a diagram showing an example of a schematic configuration of the IP broadcasting system 1 for realizing the switching control according to the first embodiment. FIG. 5 is a block diagram showing an example of the configuration of the IP gateway 100b according to the first embodiment. FIG. 6 is a diagram showing an example of Receiver information described in the message body 54 of the registration message 51. FIG. 7 is a diagram showing an example of Sender information described in the message body 54 of the registration message 51. FIG. 8 is a diagram showing an example of Flow information described in the message body 54 of the registration message 51. FIG. 9 is a diagram showing an example of Sender information described in the SDP format. FIG. 10 is a block diagram showing an example of the configuration of the IP controller 200 according to the first embodiment. FIG. 11 is a sequence diagram showing a registration sequence of registration information regarding the node. FIG. 12 is a diagram showing an example of a notification message (IS-04 registration information notification) in which receiver information is described. FIG. 13 is a block diagram showing an example of the configuration of the APS 300 according to the first embodiment. FIG. 14 is a diagram showing an example of a schematic configuration of the IP gateway 500 of the IP broadcasting system according to the second embodiment.

Hereinafter, embodiments of the IP broadcasting system, IP gateway device, management node device, client device, and method disclosed in the present application will be described in detail with reference to the drawings. The present invention is not limited to this embodiment. Further, in the specification and drawings of the present application, duplicate description may be omitted by assigning the same reference numerals to elements that can be similarly described.

The explanation is given in the following order.
1. 1. Overview 1.1. System configuration example 1.2. Examples of HTTP-based control messages 1.3. Explanation of issues 2. First Embodiment 2.1. System configuration 2.2. IP gateway configuration 2.3. IP controller configuration 2.4. Composition of APS 2.5. Technical features 3. Modification example of the first embodiment 4. Second Embodiment 4.1. System configuration 4.2. Technical features

<1. Overview>
<1.1. System configuration example>
First, with reference to FIG. 1, an outline of an IP broadcasting system to which the embodiment of the present disclosure can be applied will be described. FIG. 1 is a schematic view showing an example of the configuration of the IP broadcasting system 1 according to the embodiment of the present disclosure. Referring to FIG. 1, the IP broadcasting system 1 includes one or more network devices 12, a camera 14, a monitor 16, a setting terminal 18, a camera 22, a microphone 24, a data server 26, an integrated playout 32, and a monitor. 34, includes at least one IP gateway 100a, at least one IP gateway 100b, management node 200 and APS300. The network device 12, the camera 14, the monitor 16, the setting terminal 18, the IP gateway 100a, the IP gateway 100b, the management node 200, and the APS 300 belong to the IP domain 10.

(1) Description of Each Device The network device 12 is a device in charge of transferring a stream in an IP network. Each of the network devices 12 may be any type of network device, such as a router, switch, bridge or repeater. Each of the network devices 12 may be a general-purpose product (for example, COTS) that can be introduced at low cost. Further, the network device 12 may be an IP router 12 described later. Although four network devices 12 are shown in FIG. 1, the IP broadcasting system 1 may include any number of network devices 12 without being limited to such an example. The IP domain 10 may be composed of a single network or may include a plurality of subnetworks.

The camera 14 is a type of capture device that produces broadcast material. For example, the camera 14 captures some object and generates video data. The camera 14 may acquire voice through a built-in microphone and generate voice data. The camera 14 belongs to the IP domain 10 and can packetize a data stream of video data and audio data into a series of IP packets and transmit the data stream to an IP network.

The monitor 16 is a kind of playback device that receives broadcast material and reproduces the content. For example, the monitor 16 receives the video data and reproduces the video. The monitor 16 may receive audio data and reproduce the audio. The monitor 16 may receive the auxiliary data to be additionally transmitted and process the auxiliary data (for example, play subtitles). The monitor 16 may provide the user with an editing function for editing the content. The monitor 16 belongs to the IP domain 10 and can receive a series of IP packets transferred on the IP network.

The setting terminal 18 is a terminal device that provides a user with a user interface related to the operation of the IP broadcasting system 1. The setting terminal 18 may be a user terminal dedicated to the IP broadcasting system 1, or may be a general-purpose terminal such as a PC (Personal Computer) or a smartphone. For example, the setting terminal 18 acquires information that can be set by the user among the information related to the node belonging to the IP domain 10 via the user interface, and transmits the acquired information to the management node 200. Further, the setting terminal 18 receives, for example, a request for transmission of a stream between given devices via a user interface, and transmits a request message to the management node 200.

The IP gateway 100a is at least one gateway device located at the boundary between the IP domain 10 and another signal domain. The IP gateway 100a connects to one or more network devices 12. In the example of FIG. 1, the camera 22, the microphone 24, and the data server 26 are further connected to the IP gateway 100a. For example, the IP gateway 100a may receive an SDI signal carrying video data from the camera 22. Further, the IP gateway 100a can receive an SDI signal for carrying voice data from the microphone 24. Further, the IP gateway 100a can receive an SDI signal that carries one or more of video data, audio data, and auxiliary data from the data server 26. The signal format of the signal transmitted outside the IP domain 10 may be any derivative of SDI such as SD-SDI, HD-SDI, 3G-SDI, 6G-SDI or 12G-SDI. Alternatively, the signal format may be other than SDI. As described above, the IP gateway 100a multiplexes or demultiplexes the signals that carry the broadcast material received from the camera 22, the microphone 24, and the data server 26 as necessary, and then packetizes them into a series of IP packets. It can be sent to an IP network.

The IP gateway 100b is also at least one gateway device located at the boundary between the IP domain 10 and another signal domain. The IP gateway 100b connects to one or more network devices 12. In the example of FIG. 1, the integrated playout 32 and the monitor 34 are further connected to the IP gateway 100b. For example, the IP gateway 100b receives IP packets transferred on the IP network, converts the IP packets into SDI signals (or signals in other signal formats), and one of the integrated playout 32 and the monitor 34. Or it can be sent to both parties. As a matter of course, the IP gateway 100a may have a function of converting an IP packet into an SDI signal in the same manner as the IP gateway 100b. Further, the IP gateway 100b may have a function of converting an SDI signal into an IP packet in the same manner as the IP gateway 100a.

The management node 200 is an information processing device that manages information related to nodes belonging to the IP domain 10 and transmission of streams between the nodes. When the management node 200 detects, for example, that some device is connected to the IP network, it acquires the identification information, address information, and other attribute information of the device, and obtains the acquired information (inside the management node 200 or Register with an external) database. Further, the management node 200 receives a message (for example, a heartbeat or a status message) periodically transmitted from each of the registered devices belonging to the IP domain 10, and thereby receives the status (for example, connected) of each device. , During disconnection or failure, etc.). Further, when the management node 200 receives the control message requesting the transmission of the stream from the APS 300 or the setting terminal 18 (these are also referred to as higher-level devices), the management node 200 sets up the transmission of the requested stream. In addition, the management node 200 may provide additional functionality such as alarm output, log management and performance monitoring. Further, the management node 200 may operate as the IP controller 200 of the NMOS standard of the first embodiment described later. For example, the registration service of each node constituting the network uses RDS (Registration & Discovery System). Do it. Further, the IP controller 200 operates as a device that generates and transmits a control message (control message conforming to IS-05) for switching streams (video data, audio data, auxiliary data), that is, a device that performs switching control. It may be that.

The APS 300 may be, for example, one of the IMS's IS-05 Clients, and is a system that advances the broadcasting of a television program according to a predetermined schedule. For example, the APS 300 sends a control message to the management node 200 to transmit a data stream output from a given source (eg, a camera and microphone, or a data server) to the integrated playout 32 at a given time. .. Upon receiving the data stream, the integrated playout 32 transmits a broadcast signal of the television program to the antenna through the line of the broadcasting station. The data stream is also distributed to, for example, the monitor 16 or the monitor 34, and the broadcast content can be reproduced even in the broadcasting station. Further, the APS 300 operates as, for example, a device for generating and transmitting a control message (control message conforming to IS-05) for switching streams (video data, audio data, auxiliary data), that is, a device for performing switching control. You may do it.

(2) IP Multicast While the exchange of control messages in the IP domain 10 of the IP broadcasting system 1 can be performed by unicast, the transmission of the stream carrying the broadcast material is typically performed by multicast. The source IP address of the multicast packet is the IP address of the transmitting node, and the destination IP address is a multicast address belonging to a specific address range. A set of nodes that receive multicast packets destined for individual multicast addresses is called a multicast group, and multicast addresses are also called group addresses. A receiving node that intends to receive a stream sends a message (for example, IGMP (Internet Group Management Protocol) JOIN) notifying that it joins a multicast group corresponding to the stream to a nearby router. Then, a message exchange for updating the multicast tree is performed between the routers, and the stream transmitted from the specific transmitting node is delivered to the receiving node via the IP network. When the receiving node ends the reception of the multicast stream, it sends a message notifying the leave from the multicast group to a nearby router. The technique according to the present disclosure is not limited to the above-mentioned example, and can be applied to a case where a stream is transmitted by unicast.

(3) Essence and Stream As described above, the content of a television program is generally composed of three types of broadcast material data: video data, audio data, and auxiliary data. In the present specification, the term "essence" is used to distinguish the types of broadcast materials and refer to the components of these contents. In other words, the essence is a broadcast material expressed as data. When attempting to transmit an essence over an IP network, the essence is converted into a digital signal and packetized according to some IP-based protocol. A common port number is assigned to each stream in a series of IP packets that carry the essence. That is, the stream can be a sequence of IP packets that have a common IP address and port number.

(4) Stream type for each protocol When SMPTE ST2022-6 is used as a protocol for stream transmission, this protocol maps SDI signals to IP packets as they are, so that a single stream has different types of essences. Mixed. When the SMPTE ST2110 series is utilized, different types of essences are carried by different streams, so a single stream contains only a single type of essence. When ARIB STD-B73 is used, different types of essences are mixed in a single stream, but unlike SDI images, the blanking period is not included. In either protocol, packets are transmitted according to RTP (Real-time Transport Protocol) at the application layer and UDP (User Datagram Protocol) at the transport layer.

(5) Example of Logical Configuration of IP Domain FIG. 2 is a diagram showing an example of the logical configuration of the IP domain 10 of the IP broadcasting system 1 shown in FIG. Referring to FIG. 2, the first node (node # 1) corresponding to the camera 14 includes a sender (Sender) 60a. A "sender" is a functional entity that has the ability to send a stream. The second node (node # 2) corresponding to the IP gateway 100a includes the senders 60b and 60c, and the third node (node # 3) corresponding to the IP gateway 100a includes the sender 60d. The senders 60b, 60c and 60d may correspond to the devices that are the sources of the individual streams housed by the IP gateway 100a. The fourth node (node # 4) corresponding to the monitor 16 includes the receiver 70a. A "receiver" is a functional entity capable of receiving a stream. The fifth node (node # 5) corresponding to the IP gateway 100b includes the receivers 70b and 70c, and the sixth node (node # 6) corresponding to the IP gateway 100b includes the receiver 70d. The receivers 70b, 70c and 70d may correspond to devices to which individual streams housed by the IP gateway 100b are received.

As can be understood from the above description, one node (which may be called a "card") represents one physical entity. Not limited to the example of FIG. 1, one node may include any number of senders and / or any number of receivers as functional entities.

For example, the NMOS being studied by the AMWA, given such a logical system model, defines the specifications of a control interface for managing and controlling the transmission of streams in the IP domain. The management node 200 (IP controller 200 described later), the APS 300, and other nodes may exchange messages for controlling the IP broadcasting system 1 according to, for example, this NMOS. For example, the NMOS IS-04 provides a Hypertext Transfer Protocol (HTTP) -based control interface for discovery and registration of network resources. The NMOS IS-05 provides an HTTP-based control interface for device connection management. Not limited to such examples, the techniques of the present disclosure may be implemented using any standardized or non-standard control interface specification other than the NMOS.

<1.2. Example of HTTP-based control message>
Next, using FIG. 3, an example of a control message of an HTTP-based application protocol interface (API) for managing and controlling the transmission of a stream in an IP domain will be described.

FIG. 3 is an explanatory diagram showing an example of a registration message (IS-04 Registration) which is a control message for registering an existing node transmitted using HTTP. The registration message (IS-04 Regency) conforming to the IMS IS-04 may include, for example, information such as Node information, Sender information, Flow information, and Receiver information as registration information regarding the node, and FIG. 3 Is a diagram showing an example of a registration message in which Node information is described.

The registration message 51 shown in FIG. 3 includes a request line 52, a header 53, and a message body 54.

The request line 52 includes a URL (Uniform Resource Locator) including a host portion 56 and a path portion 57. The host portion 56 identifies the destination of the registration message 51. Therefore, the host portion 56 may be referred to as a "destination portion". In the example of FIG. 3, the destination of the registration message 51 is identified by the IP address "xxx.xxx.xxx.X" in the host portion 56. In other examples, the destination of the message may be identified by the domain. The path portion 57 identifies the API standard and version thereof to which the registration message 51 complies. In the example of FIG. 3, it is understood from the path portion 57 of the registration message 51 that the registration message 51 is a type of control message conforming to version 1.2 of the NMOS IS-04.

The message body 54 includes data that describes the control content to be executed by the node to which the registration message 51 is addressed. As an example, the control content may be described in JSON (JavaScript (registered trademark) Object Notation) format. In the example of FIG. 3, a node ID that uniquely identifies a node to be registered, an IP address of the node "xxx.xxx.xxx.Y", and the like are described in the message body 54 of the registration message 51.

<1.3. Explanation of issues>

In the IP broadcasting system, since a general-purpose network switch (for example, COTS) is used for the IP router, any broadcasting device compatible with the NMOS standard can be connected to the network for general purposes. That is, it is expected that various devices will be connected to the network of the IP broadcasting system.

However, it is not always guaranteed that the operating modes of the various devices transmitting or receiving the stream will match each other between the transmitting side and the receiving side. If streams between devices whose operation modes (4K mode, 3G mode, HD mode, etc.) do not match are transmitted from the transmitting side to the receiving side, network resources are wasted and unexpected malfunctions on the receiving side occur. Can also be triggered. In particular, in NMOS, the transmission specifications of the operation mode between transmission and reception are undefined.

An object of the present disclosure is to provide a mechanism for realizing appropriate and efficient stream switching control in a network of an IP broadcasting system.

<2. First Embodiment>
The first embodiment will be described in more detail with reference to the drawings.

<2.1. System configuration>
FIG. 4 is a diagram showing an example of a schematic configuration of the IP broadcasting system 1 for realizing the switching control according to the first embodiment. Referring to FIG. 4, the IP broadcasting system 1 of the present embodiment includes an IP gateway 100a, an IP gateway 100b, an IP router 12, an IP controller 200, and an APS 300. The IP gateway 100a, the IP gateway 100b, the IP router 12, the IP controller 200, and the APS 300 belong to the IP domain 10.

As the video material, for example, the camera 22 outputs an SDI signal for transporting video data, the microphone 24 outputs an SDI signal for transporting audio data, and the data server 26 outputs the SDI signal for transporting audio data, and the data server 26 among the video data, audio data, and auxiliary data. Outputs an SDI signal that carries one or more of. Further, the converted SDI signal is transmitted by the IP gateway 100b to one or both of the integrated playout 32 and the monitor 34 which are the video output destinations.

As shown in FIG. 1, the IP gateway 100a and the IP gateway 100b are at least one gateway device located at the boundary between the IP domain 10 and another signal domain. In this embodiment, the IP gateway 100a operates as, for example, a sender, and the IP gateway 100b operates, for example, as a receiver. The IP gateway 100a may include a receiver, and the IP gateway 100b may include a sender. Further, the IP gateway 100a and the IP gateway 100b of the present embodiment each have a plurality of operation modes (for example, 4K mode, HD mode, etc.) mixed together.

The IP router 12 is one of the network devices 12 shown in FIG. 1, and may be, for example, COTS. Although one IP router 12 is shown in FIG. 4, there may be a plurality of IP routers 12.

The IP controller 200 is the management node 200 shown in FIG. 1, and is an information processing device that manages registration information about nodes belonging to the IP domain 10 and transmission of streams between the nodes.

The APS 300 may be, for example, one of the IS-05 Clients, and is a system that advances the broadcasting of a television program according to a predetermined schedule.

In the present embodiment, for example, the IP controller 200 and the APS 300 compare the operation mode information transmitted or published from the sender side with the operation mode information transmitted from the receiver side, and when they match, the receiver is notified. On the other hand, a control message (IS-05 switching control) conforming to the NMOS IS-05 is transmitted to perform stream switching control.

<2.2. IP gateway configuration>
FIG. 5 is a block diagram showing an example of the configuration of the IP gateway 100b according to the first embodiment. Referring to FIG. 5, the IP gateway 100b includes, for example, a processing unit 110, a storage unit 120, and a communication interface 130 as receiver functions.

(1) Processing unit The processing unit 110 includes one or more processors such as a CPU (Central Processing Unit), an MPU (Micro Processing Unit), or a microcontroller. The processing unit 110 realizes the functionality of the IP gateway 100b by executing the computer program stored in the storage unit 120. In the present embodiment, the processing unit 110 functions as, for example, a registration message generation unit 111 and a switching unit 112. In other words, for example, it is a functional module realized by the registration message generation unit 111 and the switching unit 112.

(2) Storage unit The storage unit 120 includes temporary and non-temporary computer-readable memory. Temporary memory may include, for example, RAM (Random Access Memory). The non-temporary memory may include, for example, one or more of a ROM (Read Only Memory), an HDD (Hard Disk Drive), or an SSD (Solid State Drive). The storage unit 120 stores a computer program for realizing the functionality of the IP gateway 100b. The storage unit 120 further functions as a database used in the operation of the IP gateway 100b. The database may be referred to as a registry, repository, or simply a table. In the present embodiment, the data stored in the storage unit 120 is, for example, Node information, Receiver information, etc. described in the registration message (IS-04 Registration). When the IP gateway 100b includes a sender, the Sender information and the Flow information are also stored.

FIG. 6 is a diagram showing an example of Receiver information described in the message body 54 of the registration message 51. In the Receiver information of the present embodiment, for example, information on the operation mode of the receiver undefined in the NMOS is described. Specifically, the information on the operation mode of the receiver is described in, for example, "tags" that can be freely described. In the present embodiment, by describing the information of the operation mode of the receiver, the receiver corresponds to video data (HD mode, 3G mode, 4K mode, etc.), audio data (Audio mode), and auxiliary data (Data mode). Identify in which mode you are operating. For example, when the receiver operates in HD mode, 3G mode, 4K mode, or the like, information (resolution, frame rate, interlaced mode) and the like regarding the band corresponding to each operation mode are described. Further, for example, when the receiver operates in the Audio mode, the codec name (L24), the sample rate (48000 or 96000), and the like are described. Further, for example, when the receiver operates in the Data mode, the format name (smpte291) and the like are described. Further, the operation mode information may be referred to as operation mode information or media format information.

In addition to the Node information shown in FIG. 3 and the Receiver information shown in FIG. 6, the registration message 51 may include Sender information and Flow information. 7 and 8 show description examples of Sender information and Flow information, respectively. In this example, the operation mode of the sender is specified (within the specifications of the NMOS). In addition, in FIGS. 7 and 8, the details of the operation mode information of the sender are described in the Flow information, and the Sender information and the Flow information are linked by the “ID”.

(3) Communication interface The communication interface 130 is an interface that mediates communication with other devices. The communication interface 130 may include a connection terminal and a connection circuit for wired communication, or may include an antenna for wireless communication, an RF (Radio Frequency) circuit and a baseband circuit.

(4) Registration message generation unit When the own device connects to the IP network, the registration message generation unit 111 reads the receiver information including the operation mode information of the receiver from the storage unit 120, and the registration message in which the receiver information is described. 51 (IS-04 Registation) is generated (see FIG. 6). Then, the registration message generation unit 111 transmits the generated registration message 51 (IS-04 Registration) to the IP controller 200 via the communication interface 130.

(5) Switching unit The switching unit 112 has a function of switching streams when a control message (IS-05 switching control) is notified from the IP controller 200 or APS 300 via the communication interface 130.

In the present embodiment, the IP gateway 100a that operates as a sender is a registration in which sender information including the sender's operation mode information is described in the processing within the specifications of the NMOS when the own device connects to the IP network. Generate message 51 (IS-04 Migration). Then, the IP gateway 100a transmits the generated registration message 51 (IS-04 Migration) to the IP controller 200 (corresponding to the Sender information (IS-04) in FIG. 4).

Further, the IP gateway 100a may disclose the Sender information to the IP controller 200 (a node connected to the IP network) by a method other than the above. For example, when the IP controller 200 discovers the IP gateway 100a (sender) connected to the IP network through the predetermined node discovery procedure of the NMOS, the sender transmits the Sender information to the IP controller 200 in response to an inquiry (FIG. 4). (Equivalent to Sender information (SDP)). As an example, Sender information is described in SDP (Session Description Protocol) format. FIG. 9 is a diagram showing an example of Sender information described in the SDP format. Similar to the Sender information and Flow information shown in FIGS. 7 and 8, the sender information described in the SDP format also contains sender operation mode information (for example, band information (resolution, frame rate, interlaced mode)). is described.

Then, the IP controller 200 that has acquired the Sender information by either or both of the above two registration methods registers the Sender information in the storage unit 220 described later.

Since the IP gateway 100a that operates as a sender in the present embodiment operates within the specifications of the NMOS, detailed description thereof will be omitted below.

<2.3. IP controller configuration>
FIG. 10 is a block diagram showing an example of the configuration of the IP controller 200 according to the first embodiment. Referring to FIG. 10, the IP controller 200 includes a processing unit 210, a storage unit 220, and a communication interface 230.

(1) Processing unit The processing unit 210 includes one or more processors such as a CPU, an MPU, or a microcontroller. The processing unit 210 realizes the functionality of the IP controller 200 by executing the computer program stored in the storage unit 220. In the present embodiment, the processing unit 210 functions as, for example, a registration unit 211, a comparison unit 212, a control message generation unit 213, and a notification message generation unit 214. In other words, it is a functional module realized by, for example, a registration unit 211, a comparison unit 212, a control message generation unit 213, and a notification message generation unit 214.

(2) Storage unit The storage unit 220 includes temporary and non-temporary computer-readable memory. Temporary memory may include, for example, RAM. Non-temporary memory may include, for example, one or more of ROM, HDD or SSD. The storage unit 220 stores a computer program for realizing the functionality of the IP controller 200. The storage unit 220 further functions as a database used in the operation of the IP controller 200. In the present embodiment, the data stored in the storage unit 220 is, for example, the Node information and the Sender information described in the registration message 51 (IS-04 Registration) sent from the IP gateways 100a and 100b connected to the IP network. , Receiver information, etc. That is, registration information regarding all the nodes of the IP gateways 100a and 100b involved in stream transmission is stored. Further, the sender information stored in the storage unit 220 includes the operation mode information of the sender, and the receiver information includes the operation mode information of the receiver.

(3) Communication interface The communication interface 230 is an interface that mediates communication with other devices. The communication interface 230 may include a connection terminal and a connection circuit for wired communication, or may include an antenna for wireless communication, an RF (Radio Frequency) circuit and a baseband circuit.

(4) Registration unit The registration unit 211 is a registration information (Node information) regarding a node (corresponding to the IP gateway 100a (sender) and the IP gateway 100b (receiver) of the present embodiment) that transmits or receives a stream in the IP broadcasting system 1. , Node information, Gateway information, etc.) is managed by the storage unit 220. For example, the registration unit 211 monitors the connection of a node to the IP network, and when the connection of the node is detected, acquires registration information about the node from the connected node. Detection of node connections is done through standardized node discovery procedures (eg, NMOS IS-04). Further, the acquisition of the registration information regarding the node from the sender is performed through a standardized node registration procedure (for example, IMS IS-04). Further, the acquisition of the registration information about the node from the receiver is performed through the extended node registration procedure (for example, the extended NMOS IS-04). That is, in the receiver information included in the registration information about the node from the receiver, the operation mode information of the receiver undefined in the NMOS is described. In the present embodiment, for example, the IP gateway 100a (sender) and the IP gateway 100b (receiver) in which the connection to the IP network is detected sends the registration message 51 (IS-04 Registration) in which the above-mentioned various information is described to the IP controller. Send to 200. As a result, the registration unit 211 extracts and acquires the registration information regarding the node from the received registration message 51.

FIG. 11 is a sequence diagram showing a registration sequence of registration information regarding the node. In FIG. 11, registration information regarding the node is described in the registration message 51 (IS-04 Registration), and the registration message 51 is transmitted from the IP gateways 100a and 100b to the IP controller 200 (step S1). .. Further, as will be described later, in FIG. 11, registration information regarding the node is described in a notification message (IS-04 registration information notification) which is a control message from the IP controller 200 to the APS 300, and the notification message is described from the IP controller 200 to the APS 300. The state of being transmitted to is described (step S2).

(5) Comparison unit The comparison unit 212 broadcasts, for example, the setting terminal 18 shown in FIG. 1, a touch panel, a remote control (not shown), or the like in a situation where stream transmission between the sender and the receiver is set up. When the device instructs the IP controller 200 to switch the stream, the operation mode information of the sender (IP gateway 100a) that is the source of the stream to be set up and the operation mode information of the receiver (IP gateway 100b) to be switched. Compare with. Then, when the comparison results match, the comparison unit 212 instructs the control message generation unit 213 to generate a control message (IS-05 switching control). On the other hand, if the comparison results do not match, nothing is done. That is, this makes it possible to maintain the current stream transmission.

(6) Control message generation unit The control message generation unit 213 receives a generation instruction from the comparison unit 212 and generates a control message (IS-05 switching control) to be transmitted to the receiver (IP gateway 100b) to be switched. do. Then, the control message generation unit 213 transmits the generated control message (IS-05 switching control) to the target IP gateway 100b via the communication interface 230.

(7) Notification message generation unit The notification message generation unit 214 describes the registration information about the node every time the registration information (Node information, Sender information, Receiver information, etc.) about the node is registered from the node connected to the IP network. Generate the notification message (IS-04 registration information notification). Then, the notification message generation unit 214 transmits the generated notification message (IS-04 registration information notification) to the APS 300 via the communication interface 230.

FIG. 12 is a diagram showing an example of a notification message (IS-04 registration information notification) in which receiver information is described. In the Receiver information shown in FIG. 12, for example, information on the operation mode of the receiver is described. Specifically, the operation mode information of the receiver is described in, for example, the "post" parameter. As a result, the APS 300 that has received the notification message extracts the operation mode information of the receiver from the notification message, so that the receiver can use the video data (HD mode, 3G mode, 4K mode, etc.) and audio data (Audio mode). , It is possible to specify which mode corresponds to the auxiliary data (Data mode). For example, when the receiver operates in HD mode, 3G mode, 4K mode, or the like, information (resolution, frame rate, interlaced mode) and the like regarding the band corresponding to each operation mode are described (see FIG. 12).

<2.4. APS configuration>
FIG. 13 is a block diagram showing an example of the configuration of the APS 300 according to the first embodiment. Referring to FIG. 13, the APS 300 includes a processing unit 310, a storage unit 320, and a communication interface 330.

(1) Processing unit The processing unit 310 includes one or more processors such as a CPU, an MPU, or a microcontroller. The processing unit 310 realizes the functionality of the APS 300 by executing the computer program stored in the storage unit 320. In the present embodiment, the processing unit 310 functions as, for example, a registration unit 311, a comparison unit 312, and a control message generation unit 313. In other words, for example, it is a functional module realized by the registration unit 311, the comparison unit 312, and the control message generation unit 313.

(2) Storage unit The storage unit 320 includes temporary and non-temporary computer-readable memory. Temporary memory may include, for example, RAM. Non-temporary memory may include, for example, one or more of ROM, HDD or SSD. The storage unit 320 stores a computer program for realizing the functionality of the APS 300. The storage unit 320 further functions as a database used in the operation of the APS 300. In the present embodiment, the data stored in the storage unit 320 is, for example, Node information, Sender information, Receiver information, etc. described in the notification message (IS-04 registration information notification) sent from the IP controller 200. .. That is, registration information regarding all the nodes of the IP gateways 100a and 100b that transmit and receive the stream may be included.

(3) Communication interface The communication interface 330 is an interface that mediates communication with other devices. The communication interface 330 may include a connection terminal and a connection circuit for wired communication, or may include an antenna for wireless communication, an RF (Radio Frequency) circuit and a baseband circuit.

(4) Registration unit The registration unit 311 has registration information (Node information, Sender information, Receiver information) relating to a node (corresponding to the IP gateway 100a and the IP gateway 100b of the present embodiment) that transmits or receives a stream in the IP broadcasting system 1. Etc.) are managed by the storage unit 320. The registration unit 311 receives a notification message (IS-04 registration information notification) in which registration information regarding the node is described from the IP controller 200 each time the connection of the node is detected by the IP controller 200. Then, the registration unit 311 extracts and acquires the registration information regarding the node from the notification message.

FIG. 11 describes how the registration information regarding the node is described in the notification message (IS-04 registration information notification), and the notification message is transmitted from the IP controller 200 to the APS 300 (step S2).

(5) Comparison unit The comparison unit 312 is a sender of the stream to be set up in a situation where the transmission of the stream between the sender and the receiver is set up, for example, when the APS300 is instructed to switch the stream by a user operation. The operation mode information of (IP gateway 100a) and the operation mode information of the receiver (IP gateway 100b) to be switched are compared. Then, when the comparison results match, the comparison unit 312 instructs the control message generation unit 313 to generate a control message (IS-05 switching control). On the other hand, if the comparison results do not match, nothing is done. That is, this makes it possible to maintain the current stream transmission.

(6) Control message generation unit The control message generation unit 313 receives a generation instruction from the comparison unit 312 and generates a control message (IS-05 switching control) to be transmitted to the receiver (IP gateway 100b) to be switched. do. Then, the control message generation unit 313 transmits the generated control message (IS-05 switching control) to the target IP gateway 100b via the communication interface 330.

<2.5. Technical features>
Hereinafter, the processing flow of the IP broadcasting system 1 related to the switching control of the present embodiment will be described with reference to FIGS. 4, 5, 10 and 13.

In FIG. 4, for example, the IP controller 200 and the APS 300 compare the operation mode information transmitted or published from the sender side with the operation mode information transmitted from the receiver side, and when they match, the stream is sent to the receiver. It is assumed that switching control is performed. In the present embodiment, in the registration process of the registration information regarding the node, the IP gateway 100a including the sender is a process within the specifications of the NMOS, and the registration message in which the sender information including the operation mode information of the sender is described is described. It is assumed that 51 (IS-04 Regency) is transmitted to the IP controller 200. Regarding the registration process of the registration information regarding the node, as shown in FIG. 9, the sender information described in the SDP format may be disclosed.

(registration process)
In FIG. 4, the IP controller 200 constantly monitors the connection of a node to the IP network, and when the connection of the node to the IP network is detected, the registration information about the node is acquired from the connected node. At this time, for example, when the IP gateway 100b including the receiver shown in FIG. 4 registers registration information about the node (Registration), in the IP gateway 100b, the registration message generation unit 111 moves the registration information (Node) about the node from the storage unit 120. Information, Gateway information, etc.) are read out, and a registration message 51 (IS-04 Registration) for registering registration information regarding the node is generated. Specifically, the registration message generation unit 111 generates the registration message in which the Node information is described (see, for example, FIG. 3) and the registration message 51 in which the receiver information is described (see, for example, FIG. 6). .. If the configuration includes a sender, the registration message 51 in which the sender information or the like is described may be generated.

Then, the registration message generation unit 111 transmits the generated registration message 51 (IS-04 Registration) to the IP controller 200 via the communication interface 130 (see FIG. 11, step S1).

Each time the IP controller 200 receives a registration message 51 (IS-04 Registration) from a node connected to the IP network, the IP controller 200 registers registration information about the node for each node. Specifically, in the IP controller 200, the registration unit 211 extracts registration information about the node from the registration message 51 received via the communication interface 230 and registers it in the storage unit 220.

Further, in the IP controller 200, every time the notification message generation unit 214 registers the registration information about the node from the node connected to the IP network, the notification message (IS-04 registration information) describing the registration information about the node. Notification) is generated. Then, the notification message generation unit 214 transmits the generated notification message (IS-04 registration information notification) to the APS 300 via the communication interface 230.

The APS 300 registers registration information about the node for each node each time a notification message (IS-04 registration information notification) is received from the IP controller 200. Specifically, in the APS 300, the registration unit 311 extracts the registration information regarding the node from the notification message received via the communication interface 330 and registers it in the storage unit 320.

(Switching control)
Next, stream switching control will be described. Here, in response to a request for transmission of a stream from the sender (corresponding to the IP gateway 100a in FIG. 4) to the receiver (corresponding to the IP gateway 100b in FIG. 4), the IP controller 200 transmits the requested stream. It is assumed that it has been set up.

(Switching control by IP controller)
For example, in a situation where at least one stream is set up, the IP controller 200 is instructed to switch one of the streams from the setting terminal 18 shown in FIG. 1 or a broadcasting device such as a touch panel and a remote controller (not shown). If so, switching control is performed based on the registration information about the registered node. Specifically, the comparison unit 212 of the IP controller 200 receives the operation mode information of the sender (source IP gateway 100a) that is the source of the stream to be set up from the storage unit 220, and the receiver to be switched (of the stream). The operation mode information of the receiving destination IP gateway 100b) is read and compared.

Then, the comparison unit 212 instructs the control message generation unit 213 to generate a control message (IS-05 switching control) when both operation mode information match as a result of the comparison. At this time, if the comparison results do not match, the comparison unit 212 does not instruct the generation of the control message (IS-05 switching control), for example, the comparison unit 212 sends the sender and the receiver to the device that has given the switching instruction. Notifies that stream switching is not possible because the operation mode information of is not the same. This maintains the current stream transmission.

The control message generation unit 213 instructed to generate the control message (IS-05 switching control) generates the control message to be transmitted to the switching target receiver (reception destination IP gateway 100b). Then, the control message generation unit 213 transmits the generated control message (IS-05 switching control) to the target IP gateway 100b via the communication interface 230.

In the IP gateway 100b that receives the control message (IS-05 switching control) via the communication interface 130, the switching unit 112 switches the stream based on the content described in the control message.

(Switching control by APS)
Further, when the APS 300 is instructed to switch the stream by a user operation, the APS 300 performs switching control based on the registration information regarding the registered node. Specifically, the comparison unit 312 of the APS 300 receives the operation mode information of the sender (source IP gateway 100a) that is the source of the stream to be set up from the storage unit 320, and the receiver to be switched (the reception destination of the stream). Read and compare the operation mode information of the IP gateway 100b).

Then, the comparison unit 312 instructs the control message generation unit 313 to generate a control message (IS-05 switching control) when both operation mode information match as a result of the comparison. At this time, if the comparison results do not match, the comparison unit 312 does not instruct the generation of the control message (IS-05 switching control), and the comparison unit 312, for example, sends the sender to the user device that has given the switching instruction. Notifies that stream switching is not possible because the receiver operation mode information does not match. This maintains the current stream transmission.

The control message generation unit 313 instructed to generate the control message (IS-05 switching control) generates the control message to be transmitted to the switching target receiver (reception destination IP gateway 100b). Then, the control message generation unit 313 transmits the generated control message (IS-05 switching control) to the target IP gateway 100b via the communication interface 330.

In the IP gateway 100b that receives the control message (IS-05 switching control) via the communication interface 130, the switching unit 112 switches the stream based on the content described in the control message.

As described above, the IP broadcasting system 1 of the present embodiment includes at least one IP gateway 100b that operates as a receiver on the IP network and can perform IP-based message exchange according to the NMOS.

Further, the IP gateway 100b has a storage unit 120 for storing receiver information including information on the operation mode of its own device, and a registration message 51 in which the receiver information is read from the storage unit 120 and the receiver information is described. A registration message generation unit 111 for generating and transmitting (IS-04 Registation) is provided.

As a result, in the IP broadcasting system 1, the IP controller 200 and the APS 300 can register the operation mode information of the receiver, and further check in advance whether the operation modes match each other between the sender and the receiver. Therefore, appropriate and efficient stream switching control can be realized.

<3. Modification example of the first embodiment>
In the first embodiment, in the IP controller 200 and the APS 300, appropriate and efficient stream switching control is realized by checking in advance whether the operation modes match each other between the sender and the receiver. ..

In the first modification, it is conceivable to provide the IP gateway 100b including the receiver with a configuration for checking whether the operation modes match each other between the sender and the receiver.

For example, the IP gateway 100b uses the sender information published in the SDP format shown in FIG. 9, the sender operation mode information included in the sender information, and the receiver operation mode managed by the own device in the storage unit 120. Compare with the information to determine if they match.

As a result, for example, even when a control message (IS-05 switching control) is received from a node that does not have a configuration for checking in advance whether the operation modes match each other between the sender and the receiver. Since the operation mode information can be checked in the own device, appropriate and efficient stream switching control can be realized.

<4. Second embodiment>
Subsequently, a second embodiment 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. System configuration>
FIG. 14 is a diagram showing an example of a schematic configuration of the IP gateway 500 of the IP broadcasting system according to the second embodiment. Referring to FIG. 14, the IP broadcasting system of the present embodiment includes at least one IP gateway 500, which operates as a receiver on an IP network and is capable of performing IP-based message exchanges according to an NMOS. The IP gateway 500 includes a storage unit 520 and a registration message generation unit 510.

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

In the second embodiment, the storage unit 520 stores receiver information including information on the operation mode of the own device. The registration message generation unit 510 reads the receiver information from the storage unit 520, and generates and transmits a registration message in which the receiver information is described.

According to the second embodiment, appropriate and efficient stream switching control can be realized in the network of the IP broadcasting system.

Some or all of the above embodiments may also be described, but not limited to:

(Appendix 1)
At least one IP gateway device that can act as a receiver on an IP network and perform IP-based message exchanges according to an NMOS.
With
The IP gateway device is
A first storage unit for storing receiver information including information on the operation mode of the own device, and
A registration message generation unit that reads the receiver information from the first storage unit and generates and transmits a registration message in which the receiver information is described.
To prepare
IP broadcasting system.

(Appendix 2)
The operating mode information includes information about bandwidth.
The IP broadcasting system described in Appendix 1.

(Appendix 3)
At least one sender that transmits or publishes sender information including information on the operation mode of its own device according to NMOS, and
A management node device that manages the transmission of at least one stream set up between the sender and the receiver.
With more
The management node device
A second storage unit for storing the sender information as registration information, and
Each time the registration message is received from a receiver connected to the IP network, the first registration unit extracts the receiver information from the registration message and stores the receiver information as the registration information in the second storage unit. When,
To prepare
The IP broadcasting system according to Appendix 1 or 2.

(Appendix 4)
The management node device
When a stream switching instruction is received, the first method of comparing the operation mode information of the sender, which is the source of the stream, with the operation mode information of the receiver, which is the reception destination of the stream, based on the registration information. Comparison part and
When the information of both operation modes matches as a result of the comparison by the first comparison unit, the first control message generation unit that generates and transmits a control message for switching the stream, and the first control message generation unit.
Further prepare,
The IP broadcasting system described in Appendix 3.

(Appendix 5)
When the information of both operation modes does not match as a result of the comparison by the first comparison unit, the first comparison unit indicates that the stream cannot be switched to the device that has given the switching instruction. Notice,
The IP broadcasting system described in Appendix 4.

(Appendix 6)
The management node device
Each time the registration information is stored in the second storage unit, a notification message generation unit that generates a notification message describing the registration information and transmits the notification message to the client device of the NMOS.
Further prepare
The IP broadcasting system according to Appendix 3, 4 or 5.

(Appendix 7)
The client device
A third storage unit for storing the registration information and
Each time the notification message is received, the registration information is extracted from the notification message, and the registration information is stored in the third storage unit.
When a stream switching instruction is received, a second method of comparing the operation mode information of the sender, which is the source of the stream, with the operation mode information of the receiver, which is the reception destination of the stream, based on the registration information. Comparison part and
When the information of both operation modes matches as a result of the comparison by the second comparison unit, the second control message generation unit that generates and transmits the control message for switching the stream, and the second control message generation unit.
To prepare
The IP broadcasting system according to Appendix 6.

(Appendix 8)
When the information of both operation modes does not match as a result of the comparison by the second comparison unit, the second comparison unit indicates that the stream cannot be switched to the device that has given the switching instruction. Notice,
The IP broadcasting system described in Appendix 7.

(Appendix 9)
In an IP gateway device that operates as a receiver on an IP network and is capable of performing IP-based message exchanges according to the NMOS.
A storage unit for storing receiver information including information on the operation mode of the own device, and
A registration message generation unit that reads the receiver information from the storage unit and generates and transmits a registration message in which the receiver information is described.
To prepare
IP gateway device.

(Appendix 10)
The operating mode information includes information about bandwidth.
The IP gateway device according to Appendix 9.

(Appendix 11)
Along with at least one sender that transmits or publishes sender information including information on the operating mode of the own device according to MIMO, and at least one receiver that transmits a registration message containing receiver information including information on the operating mode of the own device. In the management node device that constitutes the IP broadcasting system
A storage unit for storing the sender information as registration information,
Each time the registration message is received from a receiver connected to the IP network, the registration unit extracts the receiver information from the registration message and stores the receiver information as the registration information in the storage unit.
To prepare
Management node device.

(Appendix 12)
A comparison unit that compares the operation mode information of the sender, which is the source of the stream, with the operation mode information of the receiver, which is the reception destination of the stream, based on the registration information when the stream switching instruction is received. ,
A control message generation unit that generates and transmits a control message for switching streams when the information of both operation modes matches as a result of comparison by the comparison unit.
Further prepare,
The management node device according to Appendix 11.

(Appendix 13)
When the information of both operation modes does not match as a result of the comparison by the comparison unit, the comparison unit notifies the device that has given the switching instruction that the stream cannot be switched.
The management node device according to Appendix 12.

(Appendix 14)
Each time the registration information is stored in the storage unit, a notification message generation unit that generates a notification message describing the registration information and transmits the notification message to the client device of the NMOS.
Further prepare
The management node device according to Appendix 11, 12 or 13.

(Appendix 15)
At least one sender that transmits or publishes sender information including information on the operating mode of the own device according to the NMOS, at least one receiver that transmits a registration message containing receiver information including information on the operating mode of the own device, and the above. An IP broadcasting system is configured together with a management node device that registers the sender information and the receiver information described in the registration message as registration information and sends a notification message describing the registration information each time the registration information is registered. In the NMOS client equipment
A storage unit for storing the registration information and
Each time the notification message is received, the registration unit extracts the registration information from the notification message and stores the registration information in the storage unit.
A comparison unit that compares the operation mode information of the sender, which is the source of the stream, with the operation mode information of the receiver, which is the reception destination of the stream, based on the registration information when the stream switching instruction is received. ,
A control message generation unit that generates and transmits a control message for switching streams when the information of both operation modes matches as a result of comparison by the comparison unit.
To prepare
Client device.

(Appendix 16)
When the information of both operation modes does not match as a result of the comparison by the comparison unit, the comparison unit notifies the device that has given the switching instruction that the stream cannot be switched.
The client device according to Appendix 15.

(Appendix 17)
In a way that an IP gateway device, which acts as a receiver on an IP network and is capable of performing IP-based message exchanges according to NMOS, registers information.
A generation step to generate a registration message in which receiver information including information on the operation mode of the own device is described, and
The sending step of sending the registration message and
How to include.

(Appendix 18)
The operating mode information includes information about bandwidth.
The method according to Appendix 17.

(Appendix 19)
A first transmission step in which at least one sender transmits or publishes sender information, including information on the operating mode of its own device, according to the NMOS.
A second transmission step in which at least one receiver transmits a registration message in which the receiver information including the operation mode information of the own device is described.
A first registration step in which the management node device that manages the transmission of at least one stream set up between the sender and the receiver registers the sender information as registration information.
Each time the management node device receives the registration message from a receiver connected to the IP network, the second registration step of extracting the receiver information from the registration message and registering the receiver information as the registration information. ,
How to include.

(Appendix 20)
The management node device that has received the stream switching instruction compares the operation mode information of the sender that is the source of the stream with the operation mode information of the receiver that is the reception destination of the stream based on the registration information. The first comparison step and
When the information of both operation modes matches as a result of the comparison by the first comparison step, the management node device generates a control message for switching the stream, and the first control message generation step.
The first control message transmission step in which the management node device transmits the control message, and
Including,
The method according to Appendix 19.

(Appendix 21)
When the information of both operation modes does not match as a result of the comparison by the first comparison step, the management node device notifies the device that has given the switching instruction that the stream cannot be switched. ,
The method according to Appendix 20.

(Appendix 22)
A notification message generation step in which the management node device generates a notification message in which the registration information is described each time the registration information is registered.
A notification message transmission step in which the management node device transmits the notification message to the NMOS client device, and
Including,
The method according to Appendix 19, 20 or 21.

(Appendix 23)
A third registration step in which the client device that has received the notification message extracts the registration information from the notification message and registers the registration information.
The client device that has received the stream switching instruction compares the operation mode information of the sender that is the source of the stream with the operation mode information of the receiver that is the reception destination of the stream based on the registration information. 2 comparison steps and
When the information of both operation modes matches as a result of the comparison by the second comparison step, the client device generates a control message for switching the stream, and the second control message generation step.
A second control message transmission step in which the client device transmits the control message,
including,
The method according to Appendix 22.

(Appendix 24)
When the information of both operation modes does not match as a result of the comparison by the second comparison step, the client device notifies the device that has given the switching instruction that the stream cannot be switched.
The method according to Appendix 23.

1 IP broadcasting system 10 IP domain 12 Network device (IP router)
14, 22 Camera 16, 34 Monitor 18 Setting terminal 24 Microphone 26 Data server 32 Integrated playout 51 Registration message 52 Request line 53 Header 54 Message body 56 Host part 57 Path part 60, 60a, 60b, 60c, 60d Sender 70, 70a , 70b, 70c, 70d Receiver 100a, 100b, 500 IP gateway 110, 210, 310 Processing unit 111,510 Registration message generation unit 112 Switching unit 120, 220, 320, 520 Storage unit 130, 230, 330 Communication interface 200 Management node (IP controller)
211,311 Registration unit 212,312 Comparison unit 213,313 Control message generation unit 214 Notification message generation unit 300 APS

Claims (10)

At least one IP gateway device that can act as a receiver on an IP network and perform IP-based message exchanges according to an NMOS.
With
The IP gateway device is
A first storage unit for storing receiver information including information on the operation mode of the own device, and
A registration message generation unit that reads the receiver information from the first storage unit and generates and transmits a registration message in which the receiver information is described.
To prepare
IP broadcasting system. At least one sender that transmits or publishes sender information including information on the operation mode of its own device according to NMOS, and
A management node device that manages the transmission of at least one stream set up between the sender and the receiver.
With more
The management node device
A second storage unit for storing the sender information as registration information, and
Each time the registration message is received from a receiver connected to the IP network, the first registration unit extracts the receiver information from the registration message and stores the receiver information as the registration information in the second storage unit. When,
To prepare
The IP broadcasting system according to claim 1. The management node device
When a stream switching instruction is received, the first method of comparing the operation mode information of the sender, which is the source of the stream, with the operation mode information of the receiver, which is the reception destination of the stream, based on the registration information. Comparison part and
When the information of both operation modes matches as a result of the comparison by the first comparison unit, the first control message generation unit that generates and transmits a control message for switching the stream, and the first control message generation unit.
Further prepare,
The IP broadcasting system according to claim 2. The management node device
Each time the registration information is stored in the second storage unit, a notification message generation unit that generates a notification message describing the registration information and transmits the notification message to the client device of the NMOS.
Further prepare
The IP broadcasting system according to claim 2 or 3. The client device
A third storage unit for storing the registration information and
Each time the notification message is received, the registration information is extracted from the notification message, and the registration information is stored in the third storage unit.
When a stream switching instruction is received, a second method of comparing the operation mode information of the sender, which is the source of the stream, with the operation mode information of the receiver, which is the reception destination of the stream, based on the registration information. Comparison part and
When the information of both operation modes matches as a result of the comparison by the second comparison unit, the second control message generation unit that generates and transmits the control message for switching the stream, and the second control message generation unit.
To prepare
The IP broadcasting system according to claim 4. In an IP gateway device that operates as a receiver on an IP network and is capable of performing IP-based message exchanges according to the NMOS.
A storage unit for storing receiver information including information on the operation mode of the own device, and
A registration message generation unit that reads the receiver information from the storage unit and generates and transmits a registration message in which the receiver information is described.
To prepare
IP gateway device. Along with at least one sender that transmits or publishes sender information including information on the operating mode of the own device according to MIMO, and at least one receiver that transmits a registration message containing receiver information including information on the operating mode of the own device. In the management node device that constitutes the IP broadcasting system
A storage unit for storing the sender information as registration information,
Each time the registration message is received from a receiver connected to the IP network, the registration unit extracts the receiver information from the registration message and stores the receiver information as the registration information in the storage unit.
To prepare
Management node device. A comparison unit that compares the operation mode information of the sender, which is the source of the stream, with the operation mode information of the receiver, which is the reception destination of the stream, based on the registration information when the stream switching instruction is received. ,
A control message generation unit that generates and transmits a control message for switching streams when the information of both operation modes matches as a result of comparison by the comparison unit.
Further prepare,
The management node device according to claim 7. At least one sender that transmits or publishes sender information including information on the operating mode of the own device according to the NMOS, at least one receiver that transmits a registration message containing receiver information including information on the operating mode of the own device, and the above. An IP broadcasting system is configured together with a management node device that registers the sender information and the receiver information described in the registration message as registration information and sends a notification message describing the registration information each time the registration information is registered. In the NMOS client equipment
A storage unit for storing the registration information and
Each time the notification message is received, the registration unit extracts the registration information from the notification message and stores the registration information in the storage unit.
A comparison unit that compares the operation mode information of the sender, which is the source of the stream, with the operation mode information of the receiver, which is the reception destination of the stream, based on the registration information when the stream switching instruction is received. ,
A control message generation unit that generates and transmits a control message for switching streams when the information of both operation modes matches as a result of comparison by the comparison unit.
To prepare
Client device. A first transmission step in which at least one sender transmits or publishes sender information, including information on the operating mode of its own device, according to the NMOS.
A second transmission step in which at least one receiver transmits a registration message in which the receiver information including the operation mode information of the own device is described.
A first registration step in which the management node device that manages the transmission of at least one stream set up between the sender and the receiver registers the sender information as registration information.
Each time the management node device receives the registration message from a receiver connected to the IP network, the second registration step of extracting the receiver information from the registration message and registering the receiver information as the registration information. ,
How to include.

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