WO2012157718A1 - Récepteur et procédé de réception - Google Patents

Récepteur et procédé de réception Download PDF

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Publication number
WO2012157718A1
WO2012157718A1 PCT/JP2012/062695 JP2012062695W WO2012157718A1 WO 2012157718 A1 WO2012157718 A1 WO 2012157718A1 JP 2012062695 W JP2012062695 W JP 2012062695W WO 2012157718 A1 WO2012157718 A1 WO 2012157718A1
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WIPO (PCT)
Prior art keywords
application
broadcast
unit
receiver
data
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PCT/JP2012/062695
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English (en)
Japanese (ja)
Inventor
松村　欣司
茂明 三矢
馬場　秋継
藤沢　寛
秀 武智
保明 金次
浩行 浜田
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日本放送協会
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Application filed by 日本放送協会 filed Critical 日本放送協会
Priority to JP2013515199A priority Critical patent/JPWO2012157718A1/ja
Publication of WO2012157718A1 publication Critical patent/WO2012157718A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/60—Protecting data
    • G06F21/62—Protecting access to data via a platform, e.g. using keys or access control rules
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/09—Arrangements for device control with a direct linkage to broadcast information or to broadcast space-time; Arrangements for control of broadcast-related services
    • H04H60/14—Arrangements for conditional access to broadcast information or to broadcast-related services

Definitions

  • the present invention relates to a receiver and a receiving method.
  • This application claims priority on May 19, 2011 based on Japanese Patent Application No. 2011-112752 for which it applied to Japan, and uses the content here.
  • Non-Patent Document 1 discloses a technique that defines whether or not a command can be executed by an application program in data broadcasting.
  • the receiver side construct a mechanism that does not output communication data including contents that are not suitable for a broadcast program together with the broadcast program.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a receiver and a receiving method that do not output communication data including contents unsuitable for a broadcast program together with the broadcast program.
  • a receiver includes an application / security level storage unit that stores an application / security level indicating whether resources can be referred to, obtained by associating resource reference destination information with an application type; Based on the application execution unit that executes an application in the broadcast communication cooperation service and processes an object that refers to a resource of a server, information indicating a reference destination of the resource in the object, and information indicating a type of the application, A reference permission determination unit that identifies an application security level from an application security level storage unit, and resource reference of the server according to the application security level specified by the reference permission determination unit Comprising a resource reference control unit for controlling, the.
  • the resource reference destination information may include at least one of a protocol name and a server domain name.
  • a receiving method includes a step of storing an application security level indicating whether or not resources can be referred to, obtained by associating resource reference destination information with an application type, and broadcast communication cooperation Based on the process of executing an application in a service and processing an object that references a resource of a server, information indicating a reference destination of the resource in the object, and information indicating a type of the application, the stored application security Specifying an application security level from the level, and controlling resource reference of the server according to the specified application security level.
  • the resource reference destination information may include at least one of a protocol name and a server domain name.
  • FIG. 1 It is a figure which shows the function structure of the receiver by one Embodiment of this invention. It is a figure which shows the person using the broadcast communication cooperation system to which this invention is applied, and its relationship. It is a figure which shows the whole structure of a broadcast communication cooperation system. It is a figure which shows the terminal cooperation model of a broadcast communication cooperation system. The conceptual diagram of the service classification of a broadcast communication cooperation system is shown. It is a figure which shows the example of the text expression of AIT used for a broadcast communication cooperation system. It is a figure which shows the life cycle of the application in a broadcast communication cooperation system. It is a figure which shows the data flow between providers in a broadcast communication cooperation system. It is a figure which shows the flow of the data in the whole broadcast communication cooperation system.
  • FIG. 1 is an overall configuration diagram of a broadcasting / communication cooperation system according to an embodiment of the present invention. It is a functional block diagram which shows the internal structure of the receiver by the embodiment. It is a block diagram which shows the detailed structure of the application execution control part by the embodiment. It is a block diagram which shows the detailed structure of the presentation control part by the embodiment. It is a figure which shows the processing flow of the receiver by the embodiment. It is a figure which shows the example of data of the referability determination table by the same embodiment. It is a figure which shows the example of a screen of the receiver by the embodiment.
  • FIG. 1 is a diagram illustrating a functional configuration of a receiver according to an embodiment of the present invention.
  • the receiver 4 includes a broadcast receiving unit 401, a separation unit 402, a communication input / output unit 411, and an application execution control unit 412.
  • the application execution control unit 412 includes an application management unit 433, an application control unit 434, an application execution unit 435, and a referability determination unit (application / security level determination unit) 440.
  • the application execution unit 435 includes a resource reference control unit 442.
  • the reference availability determination unit 440 includes a reference availability determination table storage unit 441 (application / security level storage unit).
  • the configurations of the receiver 4 other than the reference availability determination unit 440 and the resource reference control unit 442 will be described later with reference to FIGS. 18 to 20.
  • the reference availability determination unit 440 and the resource reference control unit 442 are described. Will be described.
  • the reference availability determination unit 440 is a processing unit that determines whether or not the resource reference generated by the application execution unit 435 executing the application in the broadcasting / communication cooperation service is valid based on a predetermined determination criterion.
  • the resource reference destination is content on an external server and content provided by broadcasting.
  • the reference availability determination table storage unit 441 stores a reference availability determination table (application / security level information).
  • This reference determination table is information indicating the predetermined determination criterion. Specifically, the reference availability determination table is obtained by associating information (resource reference destination information) indicating a resource reference destination for each object with information (application type) indicating an application type. Level information. In HTML5, the object is, for example, a video tag.
  • the resource reference destination information is information (address related information) related to a URL (Uniform Resource Locator), for example, a protocol name and a server domain name. A data example of the referability determination table will be described later.
  • the reference availability determination unit 440 refers to the resource reference destination information corresponding to the specified object and the application type corresponding to the resource reference destination information from the reference availability determination table under the control of the application execution unit 435, and the application type The security level is acquired and supplied to the application execution unit 435.
  • the resource reference control unit 442 takes in the application security level supplied from the reference availability determination unit 440 and controls whether the application execution unit 435 can refer to the resource according to the application security level.
  • the broadcast communication cooperation system (broadcast communication integration system, broadcast communication system, transmission / reception system) to which the present invention is applied is, for example, a Hybridcast (registered trademark) (hybrid cast) system, and a broadcast communication cooperation service (Hybridcast (registered trademark)).
  • Service broadcasting / communication integration service, broadcasting / communication service).
  • the broadcasting / communication cooperation service realized by the broadcasting / communication cooperation system to which the present invention is applied links a digital broadcasting service and a communication service using the Internet or the like.
  • a receiver such as a digital television, a personal computer, or a portable terminal displays a display screen (hereinafter, “program display screen”) of a broadcast program (hereinafter also referred to as “program”) transmitted by broadcasting. (Also referred to as a “broadcast screen”), and a display screen of services and contents acquired by communication by the application installed in the receiver (hereinafter referred to as “application screen” and “application display screen”). ) And display simultaneously.
  • FIG. 2 is a diagram showing a person who uses the broadcasting / communication cooperation system and its relationship.
  • a broadcasting station that sends a program accompanied by organization distributes the program to viewers by broadcast radio waves or a communication network.
  • Broadcasting stations provide service providers with metadata related to programs in order to enhance broadcast communication cooperation services.
  • a service provider that provides a broadcasting / communication cooperation service produces and distributes content and applications (hereinafter also referred to as “apps”) for providing the broadcasting / communication cooperation service to viewers.
  • application when simply described as “application”, it refers to an application for providing a broadcasting / communication cooperation service (an application of the broadcasting / communication cooperation service).
  • the content or application producer and distributor need not be the same service provider.
  • a broadcasting station may also serve as a service provider.
  • the service provider can also provide link information to other service providers.
  • the service provider can apply for registration of the application and obtain approval from the system administrator in order to indicate that the application to be provided is official. Approved applications are not restricted in operation on the receiver.
  • a screen displayed by an unapproved application cannot overlap the program display screen and sound, but the application display screen can be reduced and displayed outside the broadcast program screen.
  • Approved applications are called official applications, and unapproved applications are called unofficial applications.
  • the official application is also referred to as a registered application, an authenticated application, an authorized application, an authorized application, an authorized application, an A (Authorized) type application, and an A application.
  • the unofficial application is also called a general application, an unauthenticated application, an unauthorized application, an unapproved application, a U (Unauthorized) type application, or a U application.
  • the system administrator is an organization that certifies that the application (receiver application) provided to the viewer is official.
  • the system administrator's decision as to whether or not to approve the applied application depends on the commission from the broadcasting station.
  • Receiver manufacturers manufacture and sell receivers.
  • the receiver manufacturer can make the receiver operable by installing an application for performing various settings of the receiver in the receiver.
  • the display screen of the application in the receiver may overlap the display screen (video) of the program.
  • the viewer can download or start the application according to his / her will. Further, the viewer can overlap the display screen of the application with the display screen (video) of the program according to his / her intention.
  • FIG. 3 is a diagram illustrating the overall configuration of the broadcast communication cooperation system.
  • the broadcasting / communication cooperation system is configured by functionally adding a “broadcasting station server group”, a “service provider server group”, and a “receiver” to the current broadcasting station equipment using radio waves.
  • Broadcasting stations have broadcasting station facilities. Further, the broadcasting station configures and manages both the broadcasting station server group and the service provider server group.
  • the service provider configures and manages a service provider server group.
  • the system administrator manages and operates the repository server.
  • the receiver manufacturer manufactures and sells the receiver. The viewer has a receiver and enjoys a broadcasting / communication cooperation service.
  • a receiver (Hybridcast (registered trademark) receiver, broadcast receiving communication device) is equipped with a standardized common API (Application Program Interface). Further, the receiver receives broadcasts of the current system such as terrestrial digital broadcast and BS (broadcasting satellite) digital broadcast.
  • the broadcasting station equipment multiplexes a signal for starting a broadcasting / communication cooperation service into a broadcasting wave. The multiplexing method will be described later.
  • the broadcasting station server group manages and distributes content and metadata held by broadcasting stations.
  • the broadcast station server group includes various servers, a data storage unit (DB (database)), and an API, and the broadcast station server group includes a content management server, a viewer management server, a content distribution server, a broadcast A station service server is included.
  • DB data storage unit
  • the content management server that manages content manages programs and metadata that are broadcast content.
  • the content management server includes a program management server that manages a broadcast program or a broadcast program, and a metadata management server that manages metadata related to the program.
  • the metadata indicates, for example, a program title, a program ID, a program summary, performers, staff, broadcast date and time, script, captions, and commentary.
  • the viewer management server manages viewers (users), and the content distribution server distributes content data by communication.
  • the broadcast station service server is a server for the broadcast station to provide a service to a service provider. Services provided by the broadcast station service server include, for example, a social network service operated by a broadcast station and a web log (blog) for each broadcast program.
  • the data storage unit of the broadcasting station server group is composed of a part for storing contents and metadata held by the broadcasting station and a database.
  • the stored data can be accessed only by the service provider that is managing it, and is restricted so that it cannot be accessed by others.
  • the API of the broadcast station server group is an API for providing data in response to a request from the service provider server group.
  • the API is a program that an application calls to receive a service and its execution unit.
  • a service server group managed and operated by a service provider manages and provides applications and contents.
  • the service server group includes a receiver application server, a service server, a content distribution server, a data storage unit (DB (database)), and an API.
  • DB data storage unit
  • the receiver application server is a server that manages the application of the broadcasting / communication cooperation service.
  • the service provider stores, manages, and distributes applications that operate on the receiver. Service providers are composed of groups or individuals.
  • the receiver application server In response to a request from the receiver, the receiver application server notifies the receiver of the storage location of the application file (the application file will be described later) and distributes the application file.
  • the service server is a server that provides a service in response to a request from an application running on the receiver.
  • Examples of the service server include a multilingual subtitle server, a speech speed conversion voice server, a social TV server, a recommendation server, a program review server, and a bookmark server.
  • the content distribution server is a server that provides content in response to a request from an application running on the receiver.
  • Examples of the content distribution server include a VOD (Video On Demand) distribution server, a caption distribution server, and a multi-view distribution server.
  • the data storage unit of the service provider server group is a place for storing content data, metadata, data created by the service provider, viewer data, and application files.
  • the data stored in the data storage unit can be accessed only by the service provider that is managing it, and cannot be accessed by others.
  • the API of the service server group is an API for providing application files, contents, and services in response to requests from applications running on the receiver.
  • the receiver receives and displays the broadcast of the current system, and executes a broadcasting / communication cooperation service.
  • Current broadcasting is satellite broadcasting such as terrestrial digital broadcasting and BS digital broadcasting, and data broadcasting.
  • the receiver is connected to the Internet.
  • the receiver makes an application download request to the service provider server based on the information multiplexed on the received broadcast wave.
  • the application executes an application program included in the downloaded application file, the application operates on the receiver.
  • An application operating on the receiver accesses the service provider server and acquires content.
  • the receiver has a broadcasting / communication cooperation function which is a function necessary for executing a broadcasting / communication cooperation service such as a synchronization function and an application control function. Since the API for the broadcasting / communication cooperation function is shared, it is easy to create an application and the application does not depend on the receiver.
  • the broadcasting / communication cooperation service also incorporates functions for cooperation with devices such as personal computers and portable terminals.
  • Broadcast / communication cooperation functions include broadcast / communication cooperation basic functions and optional functions to be implemented as necessary.
  • the receiver manufacturer implements the broadcasting / communication cooperation basic function in all receivers.
  • the application uses the broadcasting / communication cooperation function through the API.
  • the broadcasting / communication cooperation function operates based on an API described later.
  • the API implemented by the receiver is specified so that the operation of the application is the same without depending on the receiver. Since all applications process the receiver through the API, the application cannot access functions specific to the receiver without going through the API.
  • FIG. 4 is a diagram illustrating a terminal cooperation model of the broadcasting / communication cooperation system.
  • the receiver can provide a service in cooperation with a terminal such as a portable terminal. Examples of terminals to be linked include a personal computer, a mobile phone, a tablet, a smartphone, and a PDA (Personal Digital Assistant).
  • the receiver provides, as an API, a function that can be used by other terminals as a receiver function.
  • An API that provides a function that can be used by other terminals is called a terminal cooperation API.
  • an application running on a mobile terminal can access a broadcasting resource such as acquisition of program information or call a receiver function such as reproduction control by using the terminal cooperation API.
  • the terminal cooperation API is an API for using functions of the receiver by other terminals and applications operating on the terminals.
  • the terminals that cooperate with each other target terminals on a home network (LAN) and terminals accessed through the Internet.
  • LAN home network
  • the definition of the API that provides various operations will be described later.
  • the terminal cooperation API providing process operating on the receiver operates the terminal cooperation API.
  • the terminal cooperation API providing process operates like a kind of daemon process that operates residently.
  • RESTful REST: Representational State Transfer
  • UPnP Universal Plug and Play
  • XMPP eXtensible Messaging and Presence Protocol
  • the receiver also supports a Notification function in which a server on the Internet notifies the receiver of information by pushing.
  • the receiver receives information notified by a push from a server or the like.
  • Some receiver operations may be controlled by the Notification function, and the Notification function is also defined as part of the terminal cooperation API specification.
  • the application model of the broadcasting / communication cooperation system is a model added or changed based on the concept of the application model of DVB-GEM1.2.
  • application life cycle control such as activation is performed in conjunction with broadcast or communication content.
  • the application is activated based on an AIT (Application Information Table) (application information table, application activation information) distributed together with the AV content.
  • AIT Application Information Table
  • a provider of AV content such as a broadcaster can also control a life cycle such as automatic startup and termination of an application.
  • non-linkage the application is started and terminated without being linked to broadcasting or communication content. In this case, the life cycle of the application such as the start and end of the application is controlled only by the viewer.
  • a service means a series of programs that can be broadcasted as part of a schedule organized by a broadcaster, but this concept has been expanded in a broadcasting / communication cooperation system to provide stream-dependent and independent services. Two service types are defined.
  • FIG. 5 shows a conceptual diagram of service types.
  • a related application is started by pseudo-tuning the stream dependent service and the independent service.
  • the stream dependent service is an extension of the service concept in the conventional sense, and is configured by adding an application (or a plurality of applications) operating in conjunction with an AV stream transmitted by broadcasting or communication.
  • An application can be started in conjunction with selection / playback of an AV stream (channel selection in the case of broadcasting).
  • the independent service does not include a video / audio stream, and is configured only by an application (a plurality of applications). When the viewer selects the stand-alone service, the application is activated.
  • There are two methods for starting an application a method of starting an application file acquired on the fly, and a method of starting an application file stored (installed) in a receiver in advance.
  • On-the-fly is a method of acquiring an application file by communication when an application is executed, and is also referred to as a non-install type or a direct execution type.
  • the receiver activates an application program of an application file in the local file system based on the well-known application by AIT described later.
  • the receiver acquires and installs an application file by communication, it rewrites the information in the location hierarchy set in the related AIT (see section 2.5.1) to the location on the local file system. Accordingly, an operation for generating a value for identifying a stand-alone service (required for each AIT unit of the stand-alone service) is required.
  • AIT Application startup information
  • FIG. 6 is a diagram showing an example of a text expression of AIT used in the broadcasting / communication cooperation system.
  • the AIT used in the broadcasting / communication cooperation system is based on the AIT defined by ARIB-J.
  • AIT there are binary representation for transmission in SI (Service Information) table and text representation (AIT File) in XML (extensible markup language) format.
  • SI Service Information
  • AIT File text representation
  • XML extensible markup language
  • Known applications that are linked to AV content are sometimes multiplexed with AIT on AV content transmitted by MPEG (Moving Picture Experts Group) -2 TS (Transport Stream) or sent separately with AIT information. .
  • AIT By transmitting AIT in conjunction with AV content, life cycle control such as activation of an application that is linked to a broadcast program or dynamic application that is linked to the progress of the program can be performed at the receiver.
  • Known methods include, for example, (1) ES (Elementary Stream) addition for AIT, (2) Descriptor addition to EIT (Event Information Table), (3) Carousel transmission (4) Acquisition of AIT file by communication, (5) Dynamic transmission of AIT file by communication, and the like.
  • the AIT ES is multiplexed on the broadcast TS in the same manner as in ARIB-J.
  • the AIT is transmitted in a DSM-CC (Digital Storage Media Command and Control) data carousel.
  • DSM-CC Digital Storage Media Command and Control
  • an AIT file is transmitted by a specific module.
  • the component tag and module of the broadcast communication cooperative activation file transmission carousel are fixed. For example, “AA” is set in the component tag, “0000” is set in the module ID, and a type indicating AIT is set in the Type descriptor of the module.
  • the receiver monitors the update of the module, and when the update is detected, rereads the AIT, and executes the control specified by the AIT (application life cycle control).
  • an AIT file prepared separately is acquired simultaneously with the selection of AV content.
  • the AV content to be reproduced (content ID)
  • the information describing application activation information (AIT) are acquired as starting points. It is possible to use the concept of unit content and entry components of server type broadcasting (ARIB TR-B27).
  • control for starting a new application or terminating the active application during playback of AV content is performed by the AIT transmitting by communication.
  • control is performed at a timing that is not assumed in advance, notification by push through communication is performed.
  • the receiver acquires an AIT including activation information of an application that operates independently by communication.
  • Independent applications are obtained from known application repositories. The procedure for obtaining the startup information of each independent application is shown below.
  • FIG. 7 is a diagram illustrating a life cycle of an application.
  • the application state is “Not Loaded”, “Loaded”, “Paused”, “Started”, “Destroyed” (destroyed) according to the application state in ARIB-J. ) ".
  • an application life cycle a series of processes from when an application is loaded and executed until the application is finished.
  • control of transition between the states is called life cycle control.
  • the life cycle control of an application linked to AV content is basically performed through selection of a stream dependent service.
  • the selection of the stream dependent service is made by the viewer.
  • a service is a set of a series of contents including AV contents and applications, and a life cycle such as activation and termination is controlled by a control code included in an AIT sent together with the application.
  • a single service may include a plurality of applications that operate simultaneously.
  • Selection of a service that triggers application activation includes control from an application through a receiver API, control from a navigator as a resident application of a receiver, control of a remote control button in the case of a broadcast service, and the like. .
  • presentation of content (AV content or application) included in the service before and after switching is switched.
  • the applications included in the service before and after the switching are different, the application that was activated before the switching is terminated by the service switching, and a different application can be activated after the switching. Details of these operations will be described later in section 2.4.
  • BML Broadcast Markup Language
  • an API for controlling the start of the broadcast communication cooperation application is added as a BML API.
  • BML is a multimedia coding system defined in ARIB STD B24, and is adopted as a data broadcasting system in the current Japanese terrestrial / BS / CS digital broadcasting.
  • An independent service is a virtual service that includes only an application, and by selecting an independent application, the application is started by acquiring an AIT by the same mechanism as the activation by AIT in Section 2.3.2.1. . However, in the stand-alone service, at least one auto-start application is started.
  • the stand-alone service is selected from, for example, an application launcher.
  • Termination by other applications Using the application termination API executed by the application, other running applications are terminated. In this case, an appropriate security policy for terminating other applications is necessary.
  • the receiver terminates the designated application by the receiver function. For example, a list of applications that are activated by the receiver is displayed, and the designated application is terminated by the viewer's selection.
  • Bound application is ready to be executed when receiving the associated organization service. That is, when the composition service is started by the AIT and the reception of the composition service is finished (when the composition channel being received is changed), the execution is finished. Another application started from the bound application is also handled as a bound application. When the first activated application that is the main book of a series of related bound applications is terminated, the other applications activated thereby are also terminated.
  • the execution of the application is continued even if the received composition service is changed. Since the AIT for starting the application cannot be obtained from the composition service, the start information is obtained by other means (for example, obtaining an AIT File (file) associated with the application using an application launcher, etc.). It is given to the receiver and activated. Another application started from the unbound application is also handled as an unbound application. The application is basically terminated explicitly by the operation of the viewer, but is terminated also when an instruction (KILLALL) for terminating all applications is given by the AIT from the receiving service.
  • KILLALL an instruction
  • An unbound application is not associated with a composition service, but as shown in Section 2.3.2.4, a bound application is associated with a virtual composition service (generated in the receiver when the receiver is started). The same startup processing mechanism can be applied.
  • the method of generating a virtual composition service depends on the implementation of the receiver, and what identification value is given to the composition service depends on the implementation of the receiver. However, if application files are stored in the receiver and can be started from the application launcher at an arbitrary timing, an ID for identifying a virtual organization service or an application file acquisition destination (service provider server or Since the server is described as the acquisition destination in the AIT acquired from the repository, it is necessary to change it so that it is acquired from the storage area in the receiver). Need to be updated.
  • the activation information of all applications is given by the AIT. Acquisition of the application file is instructed by the location information of the application included in the AIT.
  • the location information is described in a hierarchy of “/ ApplicationList / Application / applicationSpecificDescriptor / dvbjDescriptor / location” (XML is described as the contents of the location element).
  • the description of the location information is, for example, “http://192.168.11.37/demo.jar”.
  • the above is an example of acquiring demo.jar (Java (registered trademark) application archive) using the HTTP (Hypertext Transfer Protocol) protocol. The transport protocol to be used and the package format of the application will be described later.
  • the package format of the application depends on the application format (Java (registered trademark) or HTML5).
  • the receiver acquires a series of files (such as a program main body and an image file) necessary for starting the application by acquiring a group of files or entry files.
  • This series of files is an application file.
  • the application file includes a compressed series of files (such as a zip file), a Jar file (Java (registered trademark) execution environment), an entry HTML file (in the case of the HTML5 execution environment), and an entry file defined uniquely. Format is used.
  • the transmission method used when acquiring the application file via the network includes acquisition using the HTTP protocol and acquisition using the FILE protocol.
  • acquisition is performed using the GET method.
  • the designation of the location of the AIT is “http: // ⁇ ”.
  • the location specification of the AIT is set to “file: /// ⁇ ”.
  • descriptors are added to EIT and AIT to control application presentation from the relationship between the application and AV content. Details will be described later in section 4.3.
  • FIG. 8 is a diagram illustrating a flow of data between business operators in the broadcasting / communication cooperation system.
  • FIG. 9 is a diagram showing a data flow in the entire broadcasting / communication cooperation system.
  • FIG. 10 is a diagram illustrating a sequence of a recommendation service.
  • Methods used between the service provider server group and the interface unit of the broadcast station server are “GET”, “POST”, “PUT”, and “DELETE”.
  • An example of the command format is shown below.
  • Parameters include ⁇ broadcast station name ⁇ , ⁇ server name ⁇ , ⁇ content ID ⁇ , ⁇ viewer ID ⁇ , ⁇ review ID ⁇ , ⁇ data to be managed ⁇ , ⁇ sort method ⁇ , ⁇ first item ⁇ , ⁇ Number ⁇ etc.
  • Data to be managed includes content information, user information, user generated content information, device information, and authentication information.
  • Content information includes title, summary, genre, broadcast date / time, broadcast time (scale), video mode, audio mode, caption data, script, performer, music, producer, production company, work, recommended program, video URI, playback It includes data indicating the number of times, CM, time stamp information, and the like.
  • the user information indicates the user's (viewer) name, age, gender, region, number of reviews written, number of comments written, favorites, friend list, playback location (time), playback end location (time), program viewing history, etc.
  • the user generated content information includes data indicating a content ID, a user ID, a review content, a review writing time, a review evaluation, and the like.
  • the device information includes a device ID.
  • the authentication information includes an authentication ID.
  • MPEG-2 Video or H.264 For multiplexing video encoded with H.264 / MPEG-4 Advanced Video Coding (AVC), audio encoded with MPEG-1 Audio Layer II, MPEG-2 Audio AAC, subtitles, etc.
  • AVC MPEG-4 Advanced Video Coding
  • MPEG-1 Audio Layer II MPEG-2 Audio Layer II
  • MPEG-2 Audio AAC MPEG-2 Audio AAC
  • subtitles etc.
  • Transport Stream format MPEG2-TS, MMT (MPEG Media Transport), MP4, etc. can also be used.
  • FIG. 11 is a diagram illustrating a transfer protocol stack.
  • Stream transmission uses RTP (Real-Time Transport Protocol) / UDP (User Datagram Protocol) and HTTP / TCP (Transmission Control Protocol).
  • RTP Real-Time Transport Protocol
  • UDP User Datagram Protocol
  • HTTP / TCP Transmission Control Protocol
  • HTTP / TCP Transmission Control Protocol
  • stream control is performed using HTTP connections, methods, and headers.
  • RTP Real-time Transport Protocol
  • RTSP Real Time Streaming Protocol
  • Multilingual subtitles comply with Timed Text Markup Language (W3C (World Wide Web Consortium)). Note that synchronization is performed separately at the application level. Each corresponding font is downloaded from the server as necessary. For example, a font file is placed on the HTTP payload. In this case, Web Dynamic Fonts and PFR (Portable Font Resource) are used. The font capacity is preferably about 5-35 MB (megabytes).
  • MPEG-2 Audio or PCM (Pulse Code Modulation) (AIFF-C (Audio Interchange File Format Compression)) is used.
  • MPEG-2 Audio the MPEG-2 AAC system defined in ARIB STD-B32 2.4 Edition, Part 2, Section 3.1 is used, and the encoding parameter constraints defined in Chapter 5 are Applied.
  • PCM the method defined in ARIB STD-B24 5.4 version 1st part 2 section 6.2 is used.
  • PCM the system defined in ARIB STD-B24 5.4 version 1st part 2 section 6.4 is used.
  • control code only APR (CR) and APD (LF) are used among the C0 control codes defined in ARIB STD-B24 5.4 version 1 Part 2 Section 7.2.2.1. . Other C0 control codes and C1 control codes are not used.
  • the conversion of character codes is in accordance with ARIB STD-B24 5.4 edition, Part 1, Part 2, Appendix E.
  • BML ARIB STD-B24
  • ARIB-J ARIB STD-B23
  • HTML5 W3C HTML5 Working draft-2011 / Jan / 13
  • the receiver has a function of presenting a BML document that conforms to the terrestrial digital broadcast operation rules (ARIB TR-B14) or the BS digital broadcast operation rules (ARIB TR-B15).
  • the receiver must be able to present data broadcasting services provided by terrestrial digital broadcasting or BS digital broadcasting in accordance with existing standards.
  • the receiver is required only to present BML content distributed by the data carousel method in broadcasting, and BML content provided by the HTTP protocol by communication (TR-B14, Volume 3, Part 2, Section 5.14, TR -B15 Part 1, Part 3, Section 8.14) is not mandatory.
  • browser.startHybridcastApp () and getAITInfo () are specified as broadcasting extended APIs for starting the communication application specified below.
  • Table 2 shows the rules for browser.startHybridcastApp ().
  • browser.startHybridcastApp () is an API for starting a broadcasting / communication cooperation application.
  • Table 3 shows the rules for getAITInfo ().
  • getAITInfo () is an API for acquiring the latest AIT information included in the service being received.
  • HTML5 [3.5.3 HTML5] [3.5.3.1 Description method]
  • the receiver supports HTML5 as a description method of a presentation engine type application provided from communication.
  • the following are supported as JavaScript (registered trademark) APIs.
  • JavaScript registered trademark
  • those being studied by W3C include Working Draft (WD) or Editor's Draft (ED).
  • the API related to the data carousel transmitted by the broadcast wave is not essential.
  • the HTML5 browser of the receiver is JavaScript (registered trademark) processing system, Web Workers (W3C Working Draft 08 Feb 2011), Widget Interface (W3C Working Draft 3 Feb 2011), HTML Implement the function of Canvas2D Context (W3C Editor's Draft 28 Feb. 2011). Since Web Workers supports multitasking, Widget Interface supports independent applications, and HTML Canvas 2D Context is necessary to support 2D vector graphics.
  • ARIB-J The receiver supports ARIB-J as a description method of an application execution engine type application provided from communication. Further, DVB Bluebook A153 (GEM Media Synchronization API) is used as a synchronization API between a plurality of streams.
  • GEM Media Synchronization API GEM Media Synchronization API
  • the name space is a character string description rule for specifying the positions of various resources such as video / audio contents, applications, monomedia files, and the like that are handled on the server or in the receiver. Namespace notation for referring to various resources used in section 3.5.2 and after is specified for each classification.
  • the resources include resources on the Internet server, resources on the application cache, and broadcasting resources.
  • the resources on the Internet server include stream resources such as VOD contents, and file resources such as applications and other resources referred to by applications.
  • Broadcast resources include stream resources such as programs being broadcast, past and future programs, and carousel resources such as modules and event messages.
  • the broadcasting / communication cooperation interface includes the following interfaces.
  • getRunningApplications Acquires information on applications being executed.
  • the return value of getRunningApplications includes apps [] and application_id and running_level for each application.
  • apps [] a list of running applications is set.
  • application_id an application ID is set, and is null when the application is unofficial.
  • running_level an execution level (authentication result and viewer setting state) is set. From a security point of view, information that can be acquired for other applications should be restricted.
  • queryApplicationInfo Acquires information about the specified application.
  • getProgramInfo Acquires information on the broadcast being received. Return values are tuner_state, network_id, ts_id, orig_ts_id, service_id, event_id, and content_id. In tuner_state, a value indicating the reception state is set.
  • getEPGInfo Acquires various information in the EIT (+ SDT) of the broadcast being received.
  • saveApplicationToCache Saves the application file on the server in the cache.
  • queryApplicationInCache Search for an application file (application program) in the cache.
  • the arguments of queryApplicationInCache () are application_id, getDSMCCModule (), addBroadcastSignalListener (), and getListFromHybridcastMenu ().
  • application_id an application ID issued from the certification authority is set.
  • getDSMCCModule () acquires the specified module from the broadcast wave.
  • addBroadcastSignalListener registers a listener that monitors updates of SI, emergency information, carousel, and event messages.
  • getListFromHybridcastMenu acquires a list of top menu applications.
  • the return values of queryApplicationInCache () are user_apps [], broadcaster_apps [], and vendor_apps [].
  • addApplicationToHybridcastMenu Adds an application to the top menu.
  • getKeyFromBroadcast Acquires key information for limited server access from broadcasting.
  • querySupportedFunction Queries the application browser function. This is used for the purpose of checking whether the function / API is available.
  • the Broadacast Signal Listener interface is a listener interface for monitoring SI, emergency information, carousel, and event messages acquired from broadcasting. This interface event also occurs when the associated organization service is changed during bound application execution.
  • the Local Database interface is an interface for holding and managing viewer information in the receiver.
  • the viewer information is information that should not be output to the server side such as personal information, and is minimum information such as a viewer ID and a receiver ID.
  • Synchronization API As a Synchronization Manager interface, an API similar to DVB Bluebook A153 (GEM Stream Synchronization API) is introduced. Further, the following interface is added as an API.
  • getCurrentSTC Acquires the current STC (System Time Clock) value.
  • STC System Time Clock
  • the system clock (STC) on the receiver side is multiplexed and distributed as a PCR (Program Clock Reference) signal in the MPEG2 transport stream so that the system clock (STC) inside the receiver is transmitted on the transmission side.
  • STC System Time Clock
  • getCurrentPositionInProgram Acquires the elapsed time from the start of the program.
  • delayStreamPresentation Starts delay presentation of the broadcast stream being presented.
  • getCurrentDelay Acquires the delay time amount (from the original presentation time) of the broadcast stream being presented.
  • [3.6.6 Security Exception interface] An interface for exceptions that occur when an application makes function calls and property operations that are prohibited at the current execution level.
  • the Security Exception interface is generated by calling each of the above APIs or by various operations on an object ( ⁇ video> for HTML5 or OO Controller for ARIB-J) that references a broadcast.
  • the receiver of the broadcasting / communication cooperation system includes an application launcher as a receiver function.
  • the application launcher is used to start an application stored in the receiver, to select an independent application from a known repository, and to select an application whose control code is “PRESENT” among applications whose start instructions are described by the AIT.
  • FIG. 12 shows an application management model in the broadcasting / communication cooperation system.
  • the “official application” is guaranteed the operation expected in the specification of the broadcasting / communication cooperation system by performing pre-registration with the registration manager (third party organization).
  • the “official application” is given an ID and signature at the time of registration, and the signature is verified by the secure manager defined in section 2.2 at the receiver, enabling access to all APIs, and program linkage using broadcast resources Service can be performed.
  • the AIT transmitted from the broadcaster enables fine presentation control according to the broadcaster's requirements.
  • the “unofficial application” does not need to be registered in advance, but the operation expected in the specifications of the broadcasting / communication cooperation system is not guaranteed, and the broadcasting-related API cannot be handled from the application. Since an “informal application” is not given an ID and signature, it is difficult to specify individual applications, but it is possible to execute it after adding a presentation restriction based on the requirements of the broadcaster.
  • FIG. 13 shows a functional model of the secure manager.
  • the secure manager is a function that comprehensively manages security in the receiver.
  • Application authentication The receiver identifies either official or informal, and if official, IDs for all applications to be executed. The official or informal distinction is made by confirming the presence or absence of a signature attached to the application file (application program). If it is official, the receiver further obtains an application ID described in the signature. Application identification is performed when an application is acquired or activated.
  • Screen presentation control described later in section 4.3.
  • Resource access control The receiver performs access control to APIs such as broadcast resources of the application being executed. When an application tries to access an API, if the application is an informal application, the access is restricted by the type of API. Further, when the application accesses the screen display API on the display, screen presentation control is executed based on the formal or informal type and the presentation policy of the broadcaster being selected. Details will be described later in section 4.3.
  • (4) Revocation An application revocation function is provided.
  • the receiver has protection functions such as viewer information protection and virus countermeasures.
  • FIG. 14 is a diagram showing the concept of the screen presentation control method.
  • the screen presentation control method is intended to reflect the broadcaster's presentation policy on how to display the communication application on the screen for each broadcast program on the receiver. This is called control.
  • presentation control in units of programs according to composition, presentation control for events occurring in a program such as an earthquake early warning, and presentation control in units of applications are realized.
  • FIG. 15 is a diagram illustrating a basic operation model of screen presentation control.
  • the method of presenting the communication content for the broadcast program which is assumed in advance by the broadcaster, is managed as a presentation rule by the receiver.
  • levels are classified according to the order of superposition and the difference in arrangement, and a table of presentation levels (policy levels) and presentation methods is held in the receiver as presentation rules.
  • the broadcaster multiplexes and transmits the designated presentation level to the broadcast wave, and the receiver collates the presentation level with the presentation rules to determine the presentation method. Thereby, presentation control based on the presentation policy of the broadcaster can be realized.
  • EIT program genre The policy level is determined from the program genre described in the existing EIT content descriptor. For this purpose, the receiver manages a correspondence table between program genres and policy levels.
  • the relationship with the ARIB standard is ARIB STD-B10, Part 2, 6.2.4, Appendix H.
  • Table 4 is a table showing a specific example of the relationship between the program genre and the policy level.
  • the program genre (program_genre) is composed of two stages of “content_nibble_level1” (0x0 to 0xF) representing the major classification and “content_nibble_level2” (0x0 to 0xF) representing the middle classification.
  • the table managed by the receiver covers the genre of the middle category, and defines a policy level value.
  • EIT + New descriptor added to EIT: A new descriptor is added to the event information section of EIT, and policy information is described. The receiver interprets this descriptor and executes a desired process, thereby realizing control according to the policy level for each program.
  • the relationship with the ARIB standard is ARIB TR-B14 (second volume), Part 3 31.3, ARIB STD-B10 Volume 2, 5.2.7.
  • Table 5 is a table showing the structure of the event security descriptor.
  • the event security descriptor shown in the figure is newly defined, and this event security descriptor is stored in the descriptor area in the EIT and transmitted.
  • a policy level policy level
  • an application ID application_identifier
  • a control code application_control_code
  • a priority application_priority
  • protocol identification protocol_id
  • program related flag associated_application_flag
  • policy_level represents a policy level in units of programs.
  • the policy level is a value from 1 to 4.
  • application_identifier () is an identifier for identifying an application.
  • Table 6 shows the structure of application_identifier ().
  • Organization_id represents the organization that created the application and takes a value of 0x00000063 or later.
  • application_id represents a number for identifying an application. application_id is uniquely assigned within the organization identification.
  • Application_control_code specifies the control code that controls the application state. Table 7 shows the definition of the control code.
  • Application_priority indicates the policy level for each application.
  • the policy level for each application indicates the relative priority among the applications announced in the service.
  • the priority is a value from 1 to 4.
  • Protocol_id indicates the protocol for transmitting the application file.
  • Table 8 shows the protocol_id specification.
  • Associated_application_flag indicates whether the application is linked to the program.
  • Table 9 shows the protocol_id specification.
  • AIT table definition and addition of new descriptor (AIT +): AIT is extended to transmit policy information. The receiver interprets this table and executes a desired process, thereby realizing control corresponding to a policy level for an event that occurs at any time.
  • the relationship with the ARIB standard is ARIB STD-B23 Part 2 10.16.
  • Table 10 shows the data structure of AIT.
  • the AIT shown in Table 10 is an extension of the AIT data structure defined by ARIB STD-B23.
  • AIT describes a policy level, an application ID, and a control code.
  • the AIT is transmitted in the section format, and is always transmitted while the event is continuing.
  • the application ID is described in application_identifier (), and the control code is described in application_control_code. These details are the same as those described in (2) EIT extension.
  • a new security policy descriptor is defined and stored in the AIT common descriptor loop for transmission.
  • Table 11 shows the structure of a newly defined security policy descriptor.
  • EWS / EEW Emergency warning broadcasting and emergency earthquake warning
  • the policy level is determined using emergency information transmitted from a broadcasting station. In the receiver, correspondence between emergency information and policy level is assumed in advance. If it is emergency warning broadcast, the emergency flag broadcast start flag of TMCC is monitored. The occurrence and termination of emergency information is detected, and the policy level at that time can be determined.
  • the relationship with the ARIB standard is ARIB STD-B31 3.15 and ARIB-STD-B24 Volume 1, Part 3, Chapter 9.
  • each of the above methods (1) to (4) can be sent simultaneously in parallel. Therefore, it is necessary to determine which method is used to prioritize what is sent and determine the policy level.
  • the priority order is as follows.
  • the receiver can determine the policy level based on this priority order, thereby enabling screen presentation control that prioritizes emergency events based on the broadcaster's intention.
  • FIG. 16 shows an example of screen presentation control according to the policy level.
  • the policy level of the program is “1”
  • both the application screen of the official application screen and the application screen of the unofficial application are allowed to be superimposed on the broadcast screen.
  • the policy level of the program is “2”
  • only the official application is allowed to be superimposed on the broadcast screen, and the application screen of the unofficial application is prohibited from being superimposed on the broadcast screen. Only display to is allowed.
  • the policy level of the program is “3”, the display of both the application screen of the official application and the application screen of the unofficial application is permitted, but overlaying on the broadcast screen is prohibited for all application screens. Only display outside the broadcast screen is allowed.
  • the policy level is “4”, only the full screen display of the broadcast screen is permitted.
  • FIG. 17 shows an example of presentation control when receiving an earthquake early warning.
  • the program policy level of program A is “1”
  • the application screen of the official application and the application screen of the unofficial application are displayed superimposed on the broadcast screen in the broadcast time zone of program A.
  • the receiver determines that the policy level in the time zone in which the earthquake early warning is generated in the broadcast time zone of program A is the policy level “4” of the emergency earthquake early warning. Therefore, even if the receiver is in the broadcast time zone of program A, the application screen of the official application and the application screen of the unofficial application are displayed on the broadcast screen in the time zone when the earthquake early warning is occurring. Overlay is prohibited.
  • FIG. 18 is an overall configuration diagram of a broadcasting / communication cooperation system according to an embodiment of the present invention.
  • the broadcasting / communication cooperation system of the present embodiment includes a broadcaster apparatus 1 owned by a broadcasting station, a service provider server group 2 held by a service provider, and a repository server 3 held by a system administrator. And a receiver 4 held by the viewer. Although only one receiver 4 is shown in the figure, a plurality of receivers 4 are actually provided.
  • the broadcast provider apparatus 1 includes a broadcast transmission apparatus 11 and a broadcast station server group 12.
  • the broadcast sending apparatus 11 corresponds to the broadcasting station equipment shown in FIG. 3, and is a broadcasting equipment for digital broadcasting composed of a program organization equipment, a program sending equipment, a transmission equipment, and the like.
  • the broadcast transmission apparatus 11 includes a broadcast-related data management unit 111, a signal setting unit 112, and a broadcast transmission unit 113.
  • the broadcast-related data management unit 111 manages program security policy data for each program, application security policy data for official applications, other policy data, and the like.
  • the program security policy data includes policy level data indicating a policy level of the program, an application ID of an application bound to the program, a control code for the application bound to the program, and the like.
  • the application security policy data includes information for identifying a program to which the application is bound, application protocol identification, location information, and the like.
  • the location information indicates the storage location (storage location) of the application, and is, for example, the URL of the receiver application server 21 or the repository server 3 that can download the application.
  • the protocol identification indicates whether the application is transmitted by broadcast or communication. Only the official application is bound to the program.
  • the policy data includes presentation rule data and a policy level table.
  • the presentation rule data is data describing a presentation method for each policy level.
  • the presentation method includes a screen display method and an audio output method.
  • the screen display method includes, for example, an official application that displays only the broadcast screen (program video), and that displays both the official application and the unofficial application with the application screen (application video) superimposed on the broadcast screen or outside the broadcast screen. There is a method in which only the application screen is displayed on the broadcast screen and the application screen of the unofficial application is displayed outside the broadcast screen.
  • Examples of the audio output method include a method of outputting only the sound of the broadcast program, and outputting the sound of the broadcast program and the sound of the official application or the unofficial application independently or mixed.
  • the policy level table is data describing the policy level corresponding to the genre of the program and the policy level of each event. An event is the content of a broadcast that does not necessarily occur in conjunction with a program, such as an emergency warning signal or an earthquake early warning.
  • the signal setting unit 112 sets various data in the broadcast signal transmitted by the broadcast sending unit 113.
  • the signal setting unit 112 sets AIT and program policy level data for a broadcast signal based on program security policy data and application security policy data managed by the broadcast-related data management unit 111.
  • the signal setting unit 112 multiplexes the AIT of the application bound to the program as an independent ES on the broadcast signal (broadcast TS) or sets it in the data carousel.
  • the signal setting unit 112 sets information equivalent to the AIT of the application bound to the program in the EIT.
  • the signal setting unit 112 sets the policy level data of the program to EIT (Table 5) or AIT (Table 11).
  • the signal setting unit 112 sets the application file to a data carousel or the like.
  • the signal setting unit 112 sets the policy data managed by the broadcast-related data management unit 111 to a broadcast signal in a section format, or to an engineering service or a data carousel.
  • the broadcast sending unit 113 transmits a broadcast signal for digital broadcasting.
  • the broadcast signal includes information set by the signal setting unit 112.
  • the broadcast station server group 12 corresponds to the broadcast station server group shown in FIG. 3, and includes a content management server 13, a content distribution server 16, a broadcast station service server 17, and a notification server 18.
  • the content management server 13 includes a program management server 14 and a metadata management server 15.
  • the program management server 14 manages already broadcasted programs and broadcasted programs.
  • the metadata management server 15 manages metadata regarding each program.
  • the metadata includes, for example, program title, program ID, program outline, performer, broadcast date and time, script, caption, and commentary data.
  • the content distribution server 16 is connected to the receiver 4 via the communication network 9 such as the Internet, and distributes content data of the content requested from the receiver 4.
  • the broadcast station service server 17 transmits the content data of the broadcast station service to the service provider server group 2. Examples of broadcasting station services include social network services and blog services.
  • the notification server 18 is connected to the receiver 4 via the communication network 9 and is bound to the program based on the program security policy data and the application security policy data acquired from the broadcast-related data management unit 111 of the broadcast transmission device 11.
  • the application AIT (FIG. 6) and the policy level data of the program are distributed to the receiver 4.
  • the notification server 18 distributes the policy data acquired from the broadcast-related data management unit 111 of the broadcast transmission device 11 to the receiver 4. Note that all or part of the information may not be distributed from the notification server 18 and may be transmitted by the broadcast sending unit 113 of the broadcast sending device 11 using only the broadcast signal.
  • the service provider server group 2 corresponds to the service provider server group shown in FIG. 3 and includes a receiver application server 21, a service server 22, a content distribution server 23, and a notification server 24.
  • the receiver application server 21, service server 22, content distribution server 23, and notification server 24 are connected to the receiver 4 via the communication network 9.
  • the receiver application server 21 manages each application and distributes application files to the receiver 4.
  • the service server 22 is, for example, a multilingual subtitle server, a speech speed conversion voice server, a social TV server, a recommendation server, a bookmark server, and the like, and distributes content data of a service requested from the receiver 4.
  • the content distribution server 23 is, for example, a VOD distribution server, a caption distribution server, or a multi-view distribution server, and distributes content data of content requested from the receiver 4.
  • the notification server 24 transmits the application AIT (FIG. 6) to the receiver 4. In the case of an official application, the notification server 24 may transmit AIT (FIG. 6) based on program security policy data or application security policy data acquired from the broadcast-related data management unit 111 of the broadcast transmission device 11.
  • the repository server 3 corresponds to the repository shown in FIG. 3 and is connected to the receiver 4 via the communication network 9.
  • the repository server 3 performs an electronic signature on an application file (application program) generated by the service provider, and transmits data necessary for authenticating the electronic signature of the application file (application program) to the receiver 4. Further, the repository server 3 transmits data indicating a list of official applications and location information of the official applications to the receiver 4.
  • the repository server 3 may transmit the application file of the official application that has been digitally signed to the receiver 4, and the receiver application server 21 receives and receives the application file of the official application that has been digitally signed from the repository server 3. You may transmit to the machine 4. Further, the repository server 3 may transmit the AIT of the official application to the receiver 4. Further, the repository server 3 receives the AIT (FIG. 6) of the official application bound to the program based on the program security policy data and the application security policy data received from the broadcast related data management unit 111 of the broadcast transmission device 11. 4 may be transmitted.
  • AIT FIG. 6
  • the receiver 4 corresponds to the receiver shown in FIG. 3, and is a device such as a television receiver, a set top box, a personal computer, or a portable terminal.
  • FIG. 19 is a functional block diagram showing the internal configuration of the receiver 4.
  • the receiver 4 includes a broadcast receiving unit 401, a separating unit 402, a clock 403, a first synchronization buffer 404-1, a second synchronization buffer 404-2, a first decoder 405-1, 2 decoder 405-2, data broadcast execution unit 406, video control unit 407, video display unit 408, audio control unit 409, audio output unit 410, communication input / output unit 411, application execution control unit 412, presentation control unit 413, operation
  • An input unit 414, a channel selection unit 415, a local information storage unit 416, and an external I / F unit 417 are configured.
  • the broadcast receiving unit 401 is a tuner that receives a broadcast signal.
  • the broadcast signal is either a wireless broadcast signal or a wired broadcast signal.
  • a radio broadcast signal is a signal obtained by receiving a broadcast radio wave (ground wave) transmitted by a transmission antenna on the broadcast station side or a satellite wave relayed by a satellite with a reception antenna.
  • the wired broadcast signal is a signal transmitted from the broadcast station side via an optical cable, a coaxial cable, or the like.
  • the broadcast receiving unit 401 receives a broadcast signal, demodulates it, and outputs a broadcast stream (TS).
  • TS broadcast stream
  • the demultiplexing unit 402 is a demultiplexer, which converts a broadcast stream supplied from the broadcast receiving unit 401 into PCR (Program Clock Reference), video data, audio data, subtitle data, data broadcast, PSI (Program Specific Information) / SI (SI). Service Information) and AIT transmitted in an independent elementary stream (ES).
  • the AIT may be included in the data broadcast, or the same content as the AIT may be set in the EIT constituting the SI.
  • the separation unit 402 may separate and output the application file from the broadcast signal.
  • the communication input / output unit 411 inputs and outputs data through communication via the communication network 9.
  • the communication input / output unit 411 outputs the AIT and application file transmitted via the communication network 9 to the application execution control unit 412. Further, the communication input / output unit 411 outputs the policy level data and policy data of the program transmitted via the communication network 9 to the presentation control unit 413.
  • the communication input / output unit 411 communicates content data distributed from the content distribution server 16 and the content distribution server 23 and content data distributed from the service server 22 in accordance with an instruction of an application executed by the application execution control unit 412. The data is received via the network 9 and output to the second synchronization buffer 404-2.
  • the operation input unit 414 is an interface that receives an operation by the viewer, and is, for example, a receiving device that receives information input by the viewer from a remote controller, a mobile phone, a tablet terminal, or the like, a keyboard, a mouse, or the like.
  • the operation input unit 414 outputs media (terrestrial / BS) and channel selection instructions input by the viewer to the channel selection unit 415.
  • the operation input unit 414 outputs instructions for starting and ending the broadcasting / communication cooperation service and instructions for the application to the application execution control unit 412.
  • the channel selection unit 415 controls media and channels received by the broadcast reception unit 401 in accordance with the operation input to the operation input unit 414.
  • the data broadcast execution unit 406 executes the data broadcast application transmitted by the digital broadcast signal, and outputs data (graphic) data of the data broadcast to the video control unit 407.
  • the data broadcast execution unit 406 includes an API for starting an application of the broadcast communication cooperation service. When the data broadcast execution unit 406 executes the data broadcast application and an API for starting the application of the broadcast communication cooperation service is called, the data broadcast execution unit 406 instructs the application execution control unit 412 to start the application. Further, the data broadcast execution unit 406 acquires the AIT and application file transmitted by the data carousel from the data broadcast and outputs them to the application execution control unit 412. Further, the data broadcast execution unit 406 acquires the policy data transmitted by the data carousel from the data broadcast and outputs it to the presentation control unit 413.
  • the application execution control unit 412 executes an application of the broadcasting / communication cooperation service.
  • the application execution control unit 412 instructs the second decoder 405-2 to decode the content data received from the content distribution server 16, the content distribution server 23, or the service server 22 in accordance with the application being executed.
  • the content data includes one or both of video data and audio data.
  • the video data is, for example, a moving image, a still image, text data, or the like.
  • the application execution control unit 412 outputs graphic (video) data and video control instructions to the video control unit 407 and outputs audio data and voice control instructions to the audio control unit 409 according to the application being executed.
  • the clock 403 outputs a timer counter value.
  • the clock 403 adjusts the frequency of the oscillator according to the timer counter value indicated by the PCR, and synchronizes the time with the broadcast transmission side.
  • the first synchronization buffer 404-1 stores video data, audio data, and caption data output from the separation unit 402.
  • a PES Packetized Elementary Stream
  • ES elementary stream
  • TS broadcast stream
  • the PES header includes PTS (Presentation Time Stamp).
  • the first synchronization buffer 404-1 outputs the video data, audio data, and caption data output from the separation unit 402 in units of PES packets according to the instruction of the first decoder 405-1.
  • the second synchronization buffer 404-2 stores the content received by the communication input / output unit 411 and the content data of the service. Alternatively, the second synchronization buffer 404-2 stores video data, audio data, and caption data output from the separation unit 402 in accordance with the viewer's instruction input from the operation input unit 414. The second synchronization buffer 404-2 outputs the stored content data or video data, audio data, and caption data of the program in units of PES packets according to the instruction of the second decoder 405-2.
  • the first decoder 405-1 identifies the PES packet in the first synchronization buffer 404-1 in which the PTS corresponding to the time output from the clock 403 is set, and the video data encoded from the identified PES packet Audio data and subtitle data are read, and the read data are decoded and output.
  • the second decoder 405-2 identifies the content data or the PES packet of the program in the second synchronization buffer 404-2 in which the PTS corresponding to the time output from the clock 403 is set, and from the identified PES packet The encoded video data, audio data, and subtitle data are read, and the read data are decoded and output.
  • the presentation control unit 413 determines the presentation method (screen display method and audio output method) according to the policy level of the selected program or the policy level of the event that is occurring and the presentation rule data.
  • the presentation control unit 413 instructs the video control unit 407 to display the broadcast screen, the application screen of the official application, and the application screen of the unofficial application according to the determined screen display method.
  • the presentation control unit 413 instructs the audio control unit 409 to output the sound based on the broadcast sound data, the sound based on the sound data of the official application, and the sound based on the sound data of the unofficial application, according to the determined sound output method. To do.
  • the video control unit 407 includes a broadcast screen based on the video data and caption data of the program output from the first decoder 405-1 and an official application based on the video data of the content data output from the second decoder 405-2.
  • the application screen of the official application is displayed on the video display unit 408 according to the screen display method instructed from the presentation control unit 413 or the application execution control unit 412.
  • graphic (video) data is output from the application execution control unit 412 by executing the application
  • the video control unit 407 displays the video according to the screen display method instructed from the presentation control unit 413 or the application execution control unit 412.
  • a display screen based on the data is also displayed on the video display unit 408.
  • the second decoder 405-2 may output video data and subtitle data of other programs.
  • the video display unit 408 is a general display, and displays broadcast and application screens.
  • the video display unit 408 displays an application screen such as a moving image, a still image, text of content data received from the communication network 9, a graphic output from the application execution control unit 412 by executing the application, Alternatively, a video that combines broadcast screens of other programs is displayed.
  • the audio control unit 409 is an audio of an official application or an unofficial application based on the audio based on the audio data of the program output from the first decoder 405-1 and the audio data of the content data output from the second decoder 405-2.
  • voice based on the voice data output from the application execution control unit 412 by execution of the application is output from the voice output unit 410 according to the voice output method instructed by the presentation control unit 413 or the application execution control unit 412.
  • the second decoder 405-2 may output audio data of another program.
  • the audio output unit 410 is a general speaker and outputs broadcast and application audio.
  • the local information storage unit 416 stores various data such as user information.
  • An external interface unit (hereinafter referred to as “external I / F unit”) 417 transmits and receives data to and from the device 8 connected to a home network such as a LAN (Local Area Network).
  • the device 8 is a terminal that operates in cooperation with the receiver 4, and is, for example, a personal computer, a mobile phone, a tablet, a smartphone, or a PDA.
  • the video display unit 408 and the audio output unit 410 are external devices connected to the receiver 4.
  • FIG. 20 is a block diagram illustrating a detailed configuration of the application execution control unit 412.
  • the application execution control unit 412 includes an application storage unit 431, an application authentication unit 432, an application management unit 433, an application control unit 434, an application execution unit 435, a resource access control unit 438, and a resource control unit 439. Prepare.
  • the application storage unit 431 is an application file received by the communication input / output unit 411 via the communication network 9, or an application file acquired from the data broadcast by the data broadcast execution unit 406, or separated from the broadcast signal by the separation unit 402. Store application files.
  • the application file may be stored in the application storage unit 431 in advance at the time of shipment.
  • the application storage unit 431 includes a main storage device and an auxiliary storage device such as a disk.
  • an application file is stored on a disk and read to the main storage device at the time of execution.
  • the application file of the application executed on-the-fly is not stored in the disk but is stored only in the main storage device, and is deleted from the main storage device when the execution is completed.
  • the application authentication unit 432 receives data necessary for authentication of the electronic signature from the repository server 3, and verifies the electronic signature added to the application file (application program) using the received data. For example, the application authentication unit 432 uses the public key received from the repository server 3 to decrypt the application file that has been digitally signed. As a result, when a predetermined data string is obtained, the application authentication unit 432 determines that the verification of the electronic signature has succeeded. If the verification of the electronic signature is successful, the application authentication unit 432 determines that the application is an official application. If the verification of the electronic signature is unsuccessful or if the electronic signature is not added, the application authentication unit 432 is an unofficial application. Judge.
  • the application management unit 433 manages the activation or stop state of the application by the application execution unit 435 and the output status of the activated application.
  • the output status is information indicating whether an image or sound is output from a running application.
  • the application management unit 433 returns the output status of the activated application and a response indicating whether the activated application is an official application or an informal application.
  • the application control unit 434 controls the start and stop of the application in the application execution unit 435 according to the control code for the application bound to the program and the instruction for the application input by the operation input unit 414. In addition, the application control unit 434 instructs the application execution unit 435 to start the application that is instructed to start from the data broadcast execution unit 406. When the channel is changed according to the input from the operation input unit 414, the application control unit 434 terminates the application bound to the program of the channel before the change and the application bound to the program of the channel after the change. The application execution unit 435 is instructed to start.
  • the application control unit 434 is equivalent to the application bound to the program and the control code for the bound application as the independent ES of the broadcast signal or the AIT included in the data broadcast and the AIT obtained from the EIT of the broadcast signal. Or from the AIT received from the notification server 18 or the notification server 24 via the communication input / output unit 411. In addition, the application control unit 434 transmits an application file download request with the location information set in the AIT as a destination.
  • the repository server 3 or the receiver application server 21 that has received the download request from the receiver 4 distributes the application file to the receiver 4.
  • the application execution unit 435 includes a receiver API unit 436 and a terminal cooperation API unit 437.
  • the application execution unit 435 reads the application program of the application instructed to start from the application storage unit 431 and executes it.
  • the application execution unit 435 executes the application program
  • the application operates on the receiver 4, and the application execution unit 435 requests content from the content distribution server 16 and the content distribution server 23 via the communication network 9. Or request a service from the service server 22.
  • the application execution unit 435 outputs graphic data and video control instructions to the video control unit 407 and outputs audio data and voice control instructions to the audio control unit 409.
  • the receiver API unit 436 executes a receiver API that is an API for using each resource in the receiver 4 when the application execution unit 435 executes the application.
  • the receiver API unit 436 executes the receiver API, the resources in the receiver 4 can be used from the application program executed by the application execution unit 435.
  • the terminal cooperation API unit 437 is an API that allows the device 8 on the home network that can communicate with the external I / F unit 417 and the device connected via the communication network 9 to use the function of the receiver 4. Execute cooperative API. When the terminal cooperation API unit 437 executes the terminal cooperation API, resources in the receiver 4 can be used from a device 8 connected via the home network or a device connected via the communication network 9.
  • the resource control unit 439 controls access from the receiver API unit 436 and the terminal cooperation API unit 437 to each functional unit that is a resource in the receiver 4.
  • the resource access control unit 438 controls whether access from the receiver API unit 436 and the terminal cooperation API unit 437 to each functional unit in the receiver 4 is permitted.
  • the resource access control unit 438 performs this control according to whether the application that is the caller of each API executed by the receiver API unit 436 or the terminal cooperation API unit 437 is an official application or an unofficial application.
  • FIG. 21 is a block diagram illustrating a detailed configuration of the presentation control unit 413.
  • the presentation control unit 413 includes a policy data management unit 451, a policy data storage unit 452, an event interpretation unit 453, a policy level collation unit 454, an event control unit 455, a program policy storage unit 456, and a policy mediation unit. 457 and a policy level storage unit 458.
  • the policy data storage unit 452 stores policy data including presentation rule data and a policy level table.
  • the policy data management unit 451 manages policy data stored in the policy data storage unit 452.
  • the policy data management unit 451 outputs the policy level table read from the policy data storage unit 452 to the policy level verification unit 454, and outputs the presentation rule data read from the policy data storage unit 452 to the policy arbitration unit 457.
  • the policy data management unit 451 receives the policy data transmitted by broadcasting from the separation unit 402 or the data broadcast execution unit 406, and receives the policy data transmitted by communication from the communication input / output unit 411.
  • the policy data management unit 451 updates the policy data stored in the policy data storage unit 452 with the policy data transmitted by broadcasting or communication.
  • the event interpreter 453 analyzes the broadcast signal received by the broadcast receiver 401, the data broadcast and subtitle data separated by the separator 402, and detects the occurrence or end of the event. When the event interpretation unit 453 detects (interprets) the occurrence or end of an event, the event interpretation unit 453 outputs the event number of the detected event and status data indicating the occurrence or end to the policy level matching unit 454.
  • the policy level checking unit 454 refers to the policy level table to determine (check) the policy level corresponding to the genre of each program indicated by the EIT and the policy level corresponding to the event specified by the event number.
  • the policy level collating unit 454 includes the broadcast start time and broadcast end time data of the program acquired from the SI input from the separating unit 402 and the policy level of the program (hereinafter referred to as “program policy level”). Output to the event control unit 455.
  • program policy level is set to EIT
  • the policy level verification unit 454 sends the program start level and end time data of the program and the program policy level of the program acquired from the EIT to the event control unit 455. Output.
  • the policy level matching unit 454 acquires the program policy level from the AIT
  • the policy level matching unit 454 outputs the acquired program policy level to the policy mediation unit 457. Further, the policy level matching unit 454 outputs the policy level determined in accordance with the event number (hereinafter referred to as “trigger policy level”) to the policy arbitration unit 457.
  • the program policy storage unit 456 stores the program start time and program end time in association with the program policy level.
  • the event control unit 455 writes the program start time and program end time data input from the policy level matching unit 454 and the program policy level in association with each other and writes them in the program policy storage unit 456, and stores them in the program policy storage unit 456. Based on these information, the time for executing the display control is managed.
  • the event control unit 455 refers to the program start time data stored in the program policy storage unit 456 and detects that the execution time is to be notified, the event control unit 455 corresponds to the execution time and the execution time.
  • the program policy level is output to the policy mediation unit 457.
  • the policy level storage unit 458 stores the execution time and program policy level, trigger policy level, and status data input to the policy arbitration unit 457.
  • the policy arbitration unit 457 determines a policy level from the execution time and program policy level input from the event control unit 455 and the trigger policy level input from the policy level collation unit 454.
  • the trigger policy level may be determined as the policy level, and the higher one of the program policy level and the trigger policy level may be determined as the policy level.
  • the policy mediation unit 457 When the program policy level acquired by the AIT is input from the policy level verification unit 454, the policy mediation unit 457 is input from the policy level verification unit 454 rather than the program policy level input from the event control unit 455. Prioritize program policy level. That is, the policy mediation unit 457 determines the policy level from the program policy level obtained from the AIT and the trigger policy level. The policy mediation unit 457 refers to the presentation rule data, and determines the screen display method and voice output based on the determined policy level, information indicating whether the running application acquired from the application management unit 433 is official, and the output status. Determine the method (presentation method). The policy arbitration unit 457 outputs the determined screen display method to the video control unit 407, and outputs the determined audio output method to the audio control unit 409.
  • FIG. 22 is a diagram showing a processing flow of the receiver according to the present embodiment.
  • the broadcast receiving unit 401 of the receiver 4 receives a broadcast signal including AV content and AIT from the broadcast transmission device 11.
  • the separating unit 402 receives a TS (broadcast stream) from the broadcast receiving unit 401, separates AV content from the TS, and outputs the AV content to the video control unit 407 side.
  • the video content is decoded via the first synchronization buffer 404-1 and the first decoder 405-1 before being input to the video control unit 407.
  • the video control unit 407 inputs the decoded AV content, and outputs a broadcast screen based on the AV content to the video display unit 408 (step S101).
  • a broadcast screen based on the AV content is output to the video display unit 408.
  • the application control unit 434 receives the AIT separated from the TS, and extracts an application control code from the AIT. If the application control code is data indicating activation of the application (for example, AUTOSTART), the application control unit 434 extracts the application ID from the AIT, for example, and outputs the application ID to the application execution unit 435. Then, the application execution unit 435 reads an application program corresponding to the input application ID from the application storage unit 431. Then, the application execution unit 435 executes the application program and outputs the execution result to the video control unit 407.
  • the executed application program is an official application authenticated by a broadcaster or the like.
  • the video control unit 407 outputs the application screen to the video display unit 408 together with the broadcast screen based on the control of the presentation control unit 413.
  • the operation input unit 414 inputs an execution instruction of a certain application program by the user's operation under the situation where both the application screen and the broadcast screen are output to the video display unit 408.
  • the application program that is instructed to be executed by the user's operation is, for example, an unofficial application that has not been authenticated by a broadcaster or the like.
  • the application control unit 434 inputs the execution instruction from the operation input unit 414 and reads the application ID stored in the local information storage unit 416 in association with the execution instruction. Alternatively, an application ID may be stored in the application program, and the application control unit 434 may read the application ID. Then, the application control unit 434 outputs the application ID to the application execution unit 435.
  • the application execution unit 435 reads the application program corresponding to the input application ID from the application storage unit 431 and executes the application program (step S102). As a result, the application screen of the application program instructed to be executed by the user is output to the video display unit 408 together with the broadcast screen.
  • the application execution unit 435 displays information indicating the type of application of the application program being executed and an object describing information indicating the resource reference destination (for example, official or non-existing).
  • Information indicating the formula) is output to the reference availability determination unit 440.
  • the information indicating the type of application is information acquired by the application execution unit 435 from the application management unit 433.
  • the reference availability determination unit 440 takes in information indicating the type of object and application.
  • the reference permission determination unit 440 reads the reference permission determination table from the reference permission determination table storage unit 441 and matches the object supplied from the application execution unit 435 among the objects included in the reference permission determination table. It is determined whether or not there is something (step S103).
  • the reference availability determination unit 440 refers to the resource reference destination information corresponding to the object and the application type corresponding to this resource reference destination information from the reference availability determination table, and the application security level. And the application security level is supplied to the application execution unit 435 (step S104).
  • the resource reference control unit 442 takes in the application / security level supplied from the reference availability determination unit 440. If the application / security level is a value indicating that resource reference is not possible (S105: YES), the resource reference control unit 442 performs processing so as not to acquire the resource from the resource reference destination (S106). Alternatively, the resource reference control unit 442 may prohibit the decoding process of the second decoder 405-2. On the other hand, when the application security level is a value indicating that the resource can be referred to (S105: NO), the processing of this flowchart ends.
  • FIG. 23 is a diagram illustrating an example of data in the referability determination table.
  • the referability determination table includes resource reference destination information (protocol name, server domain name or broadcast station ID) and application type for each object.
  • resource reference destination information protocol name, server domain name or broadcast station ID
  • application type for each object.
  • “ ⁇ ” indicates that the application security level can be referred to
  • “X” indicates that the application security level cannot be referred to.
  • the object is “video”
  • the protocol name is “http: //”
  • the server domain name is “nnn.or.jp”
  • the application ID of the application being executed is If the application type information acquired from the application management unit 433 is an unofficial application, the reference availability determination unit 440 acquires an application security level indicating that reference is not possible. As a result, the receiver 4 specifies the resource reference destination indicating that the server domain name “nnn.or.jp” is accessed by the protocol “http: //” in the URL described in the “video” tag. If so, the resource reference is prohibited.
  • the reference availability determination unit 440 Acquires the application security level indicating that reference is impossible. Thereby, when the object indicates “video”, the receiver 4 prohibits the reference to the AV content of the broadcasting station specified by 01233.4567.901 among the AV content included in the TS.
  • whether or not the resource can be referred to may be determined by referring to either the “protocol name” or “server domain name or broadcasting station ID” information corresponding to the object and the application type.
  • FIG. 24 is a diagram illustrating an example of a screen displayed on the video display unit of the receiver according to the present embodiment.
  • the display area a1 that displays the communication data input by the communication input / output unit 411 and the broadcast of the AV content included in the broadcast signal input by the broadcast receiving unit 401
  • a display area a2 for displaying a screen exists is shown.
  • the text information related to the broadcast content received by the communication input / output unit 411 of the receiver 4 is displayed in the display area a1.
  • the application execution unit 435 executes such an unofficial application a, with reference to the object “video”, among the AV contents included in the TS, the AV content of the broadcasting station specified by 01233.4567.901 ( When referring to a resource), the reference availability determination unit 440 prohibits the resource reference. Thereby, the video of the AV content of the broadcasting station specified by 0123.4567.901 among the AV content included in the TS is not output to the communication data a1.
  • the receiver 4 can refer to whether or not to store application security level information obtained by associating the resource reference destination information and the application type for each object.
  • a determination table storage unit 441 is provided.
  • the receiver 4 includes an application execution unit 435 that executes an application and processes an object that refers to a resource of an external server.
  • the receiver 4 includes a reference availability determination unit 440 that identifies an application security level from the reference availability determination table storage unit 441 based on the URL of the resource in the object and the application type (unofficial application or official application). It was.
  • the receiver 4 includes a resource reference control unit 442 that controls the resource reference of the external server according to the application / security level specified by the reference availability determination unit 440.
  • the application type is set as a resource reference permission level, an object that performs a resource reference that does not conform to this permission level is detected, and access restriction for the resource reference is performed. Can do. Therefore, according to this configuration, the receiver 4 can prevent the communication data including the contents not suitable for the broadcast program from being output together with the broadcast program.
  • each part with which the receiver in embodiment mentioned above is provided may implement
  • a program for realizing the function of each unit included in the receiver in the above-described embodiment or a program for executing each step included in the receiving method in the above-described embodiment is recorded on a computer-readable recording medium. Then, the program recorded in the recording medium may be read into the computer system and executed, whereby the processing by each unit included in the receiver or each step included in the receiving method may be performed.
  • the “computer system” includes an OS and hardware such as peripheral devices.
  • the “computer system” includes a function of providing information in the form of a so-called web page written in a markup language and a function of displaying the information on a browser.
  • “Recording medium” refers to a storage device having a non-temporary storage function. Examples include, but are not necessarily limited to, a non-portable medium such as a portable medium such as a flexible disk, a magneto-optical disk, a ROM, and a CD-ROM, and a non-portable medium such as a hard disk built in a computer system. Absent.
  • the “recording medium” includes a volatile medium such as a DRAM or an SRAM like a volatile memory inside a computer system serving as a server or a client, but is not necessarily limited thereto.
  • the “recording medium” includes a medium that holds a program for a short time, such as a receiving / transmitting device or a transferring device when transmitting a program via a network such as the Internet or a communication line such as a telephone line, It is not necessarily limited to these.
  • the program may be a program for realizing a part of the functions described above, or may be a program that can be realized by combining the functions described above with a program already recorded in a computer system.
  • the present invention can be applied to an apparatus, a method, a system, etc. for receiving a digital broadcast.
  • Broadcast transmission apparatus 11 Broadcast related data management part 112 Signal setting part 113 Broadcast transmission part 12 Broadcasting station server group 13 Content management server 14 Program management server 15 Metadata management server 16 Content distribution server 17 Broadcasting station service server 18 Notification Server 2 Service Provider Server Group 21 Receiver Application Server 22 Service Server 23 Content Distribution Server 24 Notification Server 3 Repository Server 4 Receiver 401 Broadcast Receiving Unit 402 Separating Unit 403 Clock 404-1 First Synchronization Buffer 404-2 Second synchronization buffer 405-1 First decoder 405-2 Second decoder 406 Data broadcast execution unit 407 Video control unit 408 Video display unit 409 Audio control unit 410 Audio output unit 411 Communication input / output Unit 412 application execution control unit 413 presentation control unit 414 operation input unit 415 channel selection unit 416 local information storage unit 417 external I / F unit 431 application storage unit 432 application authentication unit 433 application management unit 434 application control unit 435 application execution unit 436 reception Machine API unit 437 Terminal cooperation API

Abstract

La présente invention se rapporte à un récepteur comprenant : un module d'enregistrement de table de détermination de possibilité de référencement, qui enregistre des niveaux de sécurité d'application obtenus en associant des données de référence de ressources et un type d'application ; un module d'exécution d'application, qui exécute une application dans un service collaboratif de télécommunication et de radiodiffusion, et qui traite des objets qui référencent des ressources de serveur ; un module de détermination de possibilité de référencement, qui, sur la base du type d'application et de l'URL d'une ressource dans un objet, spécifie un niveau de sécurité d'application à partir du module d'enregistrement de table de détermination de possibilité de référencement ; et un module de commande de référencement de ressources, qui commande le référencement de ressources d'un serveur en fonction du niveau de sécurité d'application spécifié par le module de détermination de possibilité de référencement.
PCT/JP2012/062695 2011-05-19 2012-05-17 Récepteur et procédé de réception WO2012157718A1 (fr)

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JP2014140135A (ja) * 2013-01-21 2014-07-31 Kddi Corp 情報再生端末
WO2015156150A1 (fr) * 2014-04-11 2015-10-15 ソニー株式会社 Appareil de réception, procédé de réception, appareil de transmission et procédé de transmission
JPWO2015156150A1 (ja) * 2014-04-11 2017-04-13 ソニー株式会社 受信装置、受信方法、送信装置、及び、送信方法
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