WO2009157675A2 - Système et procédé de diffusion mettant en œuvre un service de contenu interactif dans un environnement universel - Google Patents

Système et procédé de diffusion mettant en œuvre un service de contenu interactif dans un environnement universel Download PDF

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Publication number
WO2009157675A2
WO2009157675A2 PCT/KR2009/003312 KR2009003312W WO2009157675A2 WO 2009157675 A2 WO2009157675 A2 WO 2009157675A2 KR 2009003312 W KR2009003312 W KR 2009003312W WO 2009157675 A2 WO2009157675 A2 WO 2009157675A2
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WIPO (PCT)
Prior art keywords
information
content
receiving terminal
service
data
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PCT/KR2009/003312
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English (en)
Korean (ko)
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WO2009157675A3 (fr
Inventor
서성호
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(주) 아이티비엠지
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Publication of WO2009157675A2 publication Critical patent/WO2009157675A2/fr
Publication of WO2009157675A3 publication Critical patent/WO2009157675A3/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/24—Systems for the transmission of television signals using pulse code modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/38—Arrangements for distribution where lower stations, e.g. receivers, interact with the broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643—Communication protocols
    • H04N21/64322—IP

Definitions

  • the present invention relates to a broadcasting system using an interactive content service in a ubiquitous environment.
  • the present invention relates to a broadcasting system using a receiving terminal such as an IPTV, a cable TV, and an H / E.
  • a broadcast system using a receiving terminal such as an IPTV, a cable TV, and an H / E.
  • IPTV service and DMB service are multimedia data services using high-speed communication network.
  • IPTV service and DMB service are multimedia data services using high-speed communication network.
  • the situation is getting worse.
  • the A / V and broadcast service signals decoded in the headend (H / E) system are divided into a fixed packet size and transmitted within a designated bandwidth, and then combined again at the receiver. At this time, processing of many programs and channels and execution of applications occur simultaneously.
  • the technical problem to be achieved by the present invention is to implement a broadcasting system such as IPTV, cable TV using an interactive content service in a ubiquitous environment, in particular, a system and method, video, audio for reflecting the paid service and billing policy System and method for interworking with programs based on time-based programs, EPG system and method that can be provided by using general program programming information, advertising method using ubiquitous interactive broadcasting system, and method and system for transmitting various contents using ubiquitous unit
  • a broadcasting system such as IPTV, cable TV using an interactive content service in a ubiquitous environment
  • a system and method video, audio for reflecting the paid service and billing policy System and method for interworking with programs based on time-based programs
  • EPG system and method that can be provided by using general program programming information
  • advertising method using ubiquitous interactive broadcasting system and method and system for transmitting various contents using ubiquitous unit
  • the present invention provides a broadcast system using a bidirectional content service of a ubiquitous environment that can implement.
  • the present invention it is possible to easily compatible with the content, easy compatibility with the web content near infinite (that is, it is possible to convert the content only by the website address), so that uniform management of the provided content and services (The advantage is that the MDP (Multicast Dissemination Protocol) service, etc.). Accordingly, the content can be expanded indefinitely regardless of the specification of the receiving terminal. That is, according to the present invention, there has been a limitation on content stored and serviced by a receiving terminal due to limitations in storage space of hardware, such as storage-memory and RAM of the receiving terminal. It is easy to secure the budget for.
  • the matching period between the contents of the receiving terminal due to easy content converting is shortened. That is, in the existing service, various matching problems may occur when the content terminal is changed in the receiving terminal, but according to the present invention, side effects and exceptions caused by the content conversion may be prevented in advance. As a result, the service launching period is shortened, and the service can be easily changed.
  • Broadcasting service providers can apply the contents they want to provide immediately regardless of the characteristics of the platform or media, and it is easy to receive contents from contents providers (CP) and data providers (DP). As a result, policies and plans for broadcast services can be easily configured or changed.
  • CP contents providers
  • DP data providers
  • Digital multimedia services mainly consist of a closed service network of service providers, so-called World Garden. World Garden Service, which is determined by the platform operator's service plan and intention, will be developed by applying the policy on billing and paid service.
  • a new method is needed to apply billing and paid services for open content on the Internet.
  • the existing world garden type service it is an easy way for the service provider to lead the billing and the service policy, but the user has problems such as lack of content and unreasonable billing.
  • the system of the present invention it is possible to effectively configure the service of the world garden type as well as the open content based service on the contrary, so that the above-mentioned problems can be solved and the digital broadcasting market in the ubiquitous era can be expanded. .
  • the linked service since the linked service is provided, it is possible to easily link between individual programs and applications, and the ubiquitous two-way service that can apply various paid services and billings with the authority and billing system of a conventional broadcasting system. It can be linked.
  • FIG. 1 is a conceptual diagram illustrating a target that can be implemented using an interactive content service in a ubiquitous environment.
  • FIG. 2 is a block diagram illustrating an exemplary configuration of a system according to an exemplary embodiment of the present invention.
  • 3 is a flowchart illustrating the interworking of the data providing unit and the subscriber management unit.
  • FIG. 4 is a screen diagram illustrating a specific example of interworking between a data provider and a subscriber manager.
  • FIG. 5 is a flowchart illustrating a method of using a linked service.
  • FIG. 6 is a screen diagram illustrating a specific example of a linked service.
  • 7 to 10 are screen diagrams illustrating an example of a non-linked service.
  • 11 is a flowchart illustrating steps of using target information.
  • FIG. 12 is a flow diagram illustrating an EPG implementation.
  • FIG. 13 is a flowchart illustrating a flowerpot splitting service implementation.
  • FIG. 14 is a screen diagram illustrating an example of an EPG.
  • 15 is a screen diagram illustrating an example of a screen division service.
  • 16 is a block diagram illustrating an example of a system requiring security.
  • 17 is a block diagram illustrating another example of a system requiring security.
  • 18 and 19 are screen diagrams illustrating an example of a system requiring security.
  • a broadcast system using an interactive content service comprising: a head-end unit for encoding and multiplexing broadcast data according to a predetermined standard, and a broadcast relating to the broadcast data.
  • An event information management unit managing event information including at least one of program programming information and channel lineup information, and a ubiquitous unit providing bidirectional contents linked to the broadcast data to a receiving terminal with reference to the event information-the bidirectional Content is provided with at least one of the video data and audio data of the broadcast data-, and a system including a data providing unit for determining whether to provide the broadcast data and the interactive content according to the rights of the subscriber of the receiving terminal Is provided.
  • a broadcasting method using an interactive content service comprising: encoding and multiplexing broadcast data according to a predetermined standard, broadcast program programming information and channel lineup information on the broadcast data; Managing event information including at least one of the following: providing bidirectional content linked to the broadcast data to a receiving terminal with reference to the event information, wherein the bidirectional content includes video data and audio of the broadcast data; Provided with at least one of the data, and determining whether to provide the broadcast data and the interactive content according to the rights of the subscriber of the receiving terminal.
  • the present invention relates to a broadcasting system using an interactive content service in a ubiquitous environment.
  • the present invention provides a system and method for reflecting a paid service and billing policy, a system and method for interworking with a video and audio-based time-based program, an EPG system and method that can be provided by using general program programming information, and screen division.
  • the service using the system for providing the bidirectional service in the ubiquitous environment may be classified into three types, as shown in FIG. 1.
  • a receiving terminal including a flexible browser regardless of a medium such as mobile, WIBRO, WWW, PDA, etc. may provide a service screen and a function by receiving contents delivered from a ubiquitous server.
  • a ubiquitous server module is installed in a receiving terminal or a secondary terminal such as a PC, personalization broadcasting and personal information sharing that can share the resource of the receiving terminal with other receiving terminals are possible.
  • control services provide a platform for multi-control between home networks and media in ubiquitous environments.
  • the broadcast service is available, and can be applied to a general broadcast system to provide a world garden service, an open content service, etc., and is easy for linked / independent services and provides a service suitable for target advertisement and personalized broadcast.
  • existing major digital broadcasting services such as EPG can be improved.
  • the present invention proposes a detailed method for implementing a broadcast service using a system for providing an interactive service in a ubiquitous environment.
  • the data broadcasting service is mainly developed by a service developer, delivered to a network through a broadcasting headend (iTV H / E), and executed at a receiving terminal.
  • the data broadcasting service is developed and matched with a Java application conforming to the data broadcasting service standard.
  • the application may be classified into an Unbound service and a Bound service according to whether or not the receiving terminal is stored and channel interworking.
  • the Unbound service it is mainly stored in the memory area of the receiving terminal and does not need to be separately received except in a situation such as a function change such as a version change.
  • the EPG service is used to configure the program information of the broadcast program on the screen of the receiving terminal.
  • the EPG service parses program organization information (event data such as PSIP / SI) configured in a receiving terminal, processes and displays a channel and a program according to time.
  • An EPG application is driven in the receiving terminal to configure this service, which displays and reconstructs the event data of the receiving terminal on the screen.
  • the reconstruction may take several seconds, and when the channel lineup is changed or the event is changed, the display information on the screen is reconfigured.
  • the EPG screen can be immediately provided to the viewer without taking time to reconstruct the display information on the screen.
  • the entire system includes a broadcasting head end (H / E; head end) unit 100, an event information managing unit 200, a data providing unit 300, and a subscriber managing unit. 400, the ubiquitous unit 500, the network 600, and the receiving terminal 700 may be included.
  • the entire system may further include a content providing system 800 for interlocking and providing various information (advertisement, other service information) to the ubiquitous unit 500.
  • a content providing system 800 for interlocking and providing various information (advertisement, other service information) to the ubiquitous unit 500.
  • the broadcast H / E unit 100 represents a typical system for encoding, compressing and multiplexing broadcast streams such as video, audio, and data applications and transmitting them to a network end.
  • the broadcast H / E section may include audio-oriented headends such as audio-only channels, headend systems such as PPV and VOD.
  • iTV H / E for data broadcasting transmitted to the receiving terminal 700, and the like.
  • the event information manager 200 is a system for managing program programming information, channel lineup information, and the like of digital broadcasting, and manages information in accordance with PSIP / SI and data broadcasting standards.
  • Program programming information of the event information management unit 200 is transmitted to the receiving terminal 700 to configure the screen of the EPG application.
  • the data provider 300 may interwork with the POD module of the receiving terminal 700 to use a service suitable for the rights of the subscriber.
  • Subscriber management unit 400 is a system that manages the billing information, personal information, etc. of the subscriber may be used to deliver the information to other systems.
  • the ubiquitous unit 500 enables a bidirectional service in a new method proposed by the present invention in association with a conventional digital broadcasting system.
  • the content providing system 800 is a system for providing various service contents through the ubiquitous unit 500 for an interactive service.
  • the content providing system 800 may be used as a system for providing advertisement content, and may be a billing system for an external service.
  • the network 600 is a path through which video / audio / data information is transmitted from the broadcast headend 100 to the receiving terminal 700 so that bidirectional information of the ubiquitous unit 500 may be transmitted together.
  • the receiving terminal 700 is a device for receiving video / audio / data and the like on a screen in a broadcasting environment.
  • the flexible browser 710 may be located in the receiving terminal 700 to receive and execute ubiquitous bidirectional content, and to manage and apply the ubiquitous bidirectional content.
  • Subscriber information (paid service and subscriber information) of the subscriber management unit 400 is transmitted to the data provider 300 and other broadcasting systems, so that the service of the receiving terminal 700 can use the service according to the charging state.
  • the ubiquitous unit 500 receives the subscriber information from the subscriber management unit 400 and delivers the corresponding subscriber information (authority and billing information for each service) to the flexible browser 710 to maintain the service policy.
  • the product upgrade and payment may also be processed.
  • Using the information provided from the POD module (cable card, smart card, etc.) of the data providing unit 300 and the receiving terminal 700 may reflect the policy of the paid service.
  • the data providing unit 300 and the subscriber management unit 400 will be described with reference to FIG. 3.
  • the flexible browser 710 of the receiving terminal 700 requests a corresponding service, and more specifically, requests for product information and additional information of the corresponding service.
  • Permission request (S12); Requests authority information of the receiving terminal 700 such as goods and billing information to which the receiving terminal 700 is subscribed to a system such as a subscriber management unit 400.
  • a relay system may be used, and the purpose of using the relay system is to bring the interworking points into one in order to reduce the interworking of the various interfaces and systems, and the subscriber management unit 400 and the data provider 300 in a system such as iTV Return. Interface can be provided after interworking first.
  • the system requesting authority may be configured as a POD module (cable card, smart card, etc.) of the receiving terminal 700.
  • POD module product information and billing information subscribed to the reception terminal 700 may exist, and a request for authority thereof may be performed.
  • FIG. 4 illustrates an embodiment of processing in a case where there is an authority in a ubiquitous bidirectional service of a world garden type.
  • the receiving terminal will be described with an example in which the basic product is subscribed.
  • the “products & services” menu 721 in the world garden service full menu screen 720 provides a function of moving to a shopping mall of open content, which may correspond to a basic service.
  • the “real estate” 722 menu may correspond to a high-end service.
  • the flexible browser compares the subscription rights and service rights to display on the screen that you do not have authority and to prompt a further product upgrade. Can be.
  • the conventional linked service is mainly composed of limited channel interworking due to the difficulty of interworking a program and an application service of the corresponding program.
  • the ubiquitous unit 500 receives the channel and program programming information from the event management server managing the program programming information.
  • the A / V program and the interactive service application are interworked using the received information.
  • the linkage may be mainly based on a start time and an end time of a channel and a program.
  • Receiving program instruction information (S20);
  • the ubiquitous unit receives program instruction information (channel information, program start time, program end time, etc.) from the event management server.
  • Channel information of the indication information may include a ProgramID, SourceID, Virtual Channel Number.
  • the ubiquitous bidirectional system generates bidirectional service schedules based on program organization information.
  • the schedule of the linked interactive service may be generated based on the channel number, start time, and end time of the home shopping program.
  • Two-way service execution condition (S22); Execution conditions of the scheduled bidirectional service may be as follows.
  • the flexible browser checks the channel being viewed and the current time to determine whether the execution condition of the interactive service is satisfied.
  • the interactive service may be executed automatically by a schedule or manually by key input of the flexible browser.
  • Interactive service management by a scheduled schedule;
  • the bidirectional service is managed by scheduling.
  • the bidirectional service may be automatically terminated.
  • Screen activation information can be assigned to screens that contain important information such as payment information during service creation, so that the screen can be maintained even when the program is terminated until the viewer's explicit key input.
  • the application itself can be scheduled as an example of event inactivity.
  • the ubiquitous unit of the present invention may provide content in association with information of a general broadcasting system.
  • the example illustrated in FIG. 6 illustrates an example in which service content 725 transmitted in association with a program being broadcast in home shopping broadcast is provided.
  • the broadcast program information configured by such interworking may be managed by an event management server such as PSIP / SI, and may be compressed and multiplexed in a broadcast H / E unit and transmitted to a receiving terminal through a network.
  • the ubiquitous unit transmits the service content 725 linked to the home shopping A / V program, and the flexible browser of the receiving terminal performs the interworking process between the home shopping A / V program and the service content 725.
  • the service content 725 may be executed while the user is watching the home shopping A / V program, and the service content 725 may be automatically terminated when the home shopping program is terminated or the user moves to another service.
  • the service content 725 may be configured on one side of the screen such that the viewer does not interfere with viewing the home shopping A / V program, and may be displayed on the screen while being semi-transparent.
  • event inactivity is, an example of an independent program that is not related to timeline events such as UCC and TV open market.
  • FIGS. 7 to 10 is an example of a screen and a scenario displayed on a receiving terminal when the ubiquitous content organized in an educational program is received while watching an educational broadcast channel. Indicates.
  • the service content is composed of four screens ranging from FIGS. 7 to 10.
  • the content information is delivered and displayed on the screen.
  • the screen schedule of the content may be set as follows.
  • the service content may be automatically updated according to the corresponding time and displayed on the screen.
  • the ubiquitous unit may deliver information such as applications and messages to all subscribers. However, it is necessary to create and deliver personalized messages that meet the needs of service advancement and marketing. A method of applying the ubiquitous unit to solve the above problem in a conventional broadcasting system will be described with reference to FIG. 12.
  • the ubiquitous unit may select a receiving terminal to which a message is to be delivered, based on the subscriber information, like the subscriber management unit. Targeting may be performed by grouping or designating as a personalization target using various attribute information such as a subscriber's name, age, age, and place of residence. Or you can use the targeting list provided by other systems.
  • the flexible browser transmits the attribute information of the receiving terminal to the ubiquitous unit.
  • the attribute information refers to information for identifying a receiving terminal such as a Mac address, a HostID, an authentication key, and a group ID to which the receiving terminal belongs.
  • Target information comparison The ubiquitous unit classifies the target receiving terminal by comparing attribute information of the receiving terminal received from the receiving terminal.
  • the response information is transmitted to the flexible browser of the receiving terminal.
  • the response information may be a signal containing information that the target receiving terminal is correct or may be service information itself.
  • the ubiquitous unit delivers the target information, and the flexible browser receives and displays it.
  • EPG electronic program guide
  • screen splitting system using a ubiquitous bidirectional service system will be described with reference to FIGS. 12 and 13.
  • the EPG service of the conventional digital broadcasting system has been constructed and serviced as follows.
  • Program information is generated by the event information management unit and transmitted to the receiving terminal through the broadcast H / E unit to the network.
  • the EPG application of the receiving terminal displays program programming information on the screen in accordance with the EPG UI.
  • the program configuration information is received from the ubiquitous unit to configure the EPG screen, and the screen itself can be delivered to the receiving terminal.
  • the ubiquitous unit receives program programming information from the event information management unit.
  • the ubiquitous unit generates program organization information as an EPG screen.
  • the ubiquitous unit receives program programming information from the event information management unit.
  • the ubiquitous unit receives a multi-channel video / audio source from the broadcast H / E unit.
  • each channel number 726 is displayed, and a program event 727 corresponding to each channel number 726 is displayed below.
  • FIG. 14 a split screen implemented by the above-described method is displayed. That is, the video screen 729 corresponding to each channel 728 is displayed.
  • Ubiquitous interactive service has many advantages in accessing and utilizing services such as world garden and open contents, but additional systems and methods are required for important personal information such as payment and security.
  • the ubiquitous unit basically performs a function of encoding and transmitting information about a service to a receiving terminal, it is difficult to apply the ubiquitous unit to a service requiring high security such as payment.
  • the first method is to place a security module in the ubiquitous unit and to encrypt data that requires security with a flexible browser and to communicate.
  • the second method is to interwork with a security module existing in the receiving terminal.
  • a security module 510 which is a module that protocolizes and encrypts information requiring security and communicates with the flexible browser 710, is located in the ubiquitous unit 500.
  • the content providing system 800 may be an external billing and payment system. In addition, any system that has information that needs security may be applicable.
  • the security module 510 maintains the security of the ubiquitous unit 500. Performs a function of communicating with and supporting the content providing system 800 to configure the entire information in a state
  • the security module 730 communicates with a content providing system 800 that provides an external billing and payment system to receive data and to secure information to the flexible browser 710.
  • the external billing and payment system directly communicates with the security module 730 in the receiving terminal 700.
  • a service request of the flexible browser (S60);
  • the flexible browser requests a general service.
  • Service content encoding (S61); Encode to send the requested service.
  • the security request information is generated (S63).
  • the security request information may be included in the property of the ordering button 731.
  • Encode and forward (S64); The security request information and the general information are encoded and transmitted to the flexible browser of the receiving terminal.
  • Receive and display (S65); The flexible browser displays the received information.
  • Judgment (has the security request information been invoked ?; S66); It is determined whether the security request information is called in the service performed by the user. For example, this is to determine whether the order button is pressed in the example screens of FIGS. 17 and 18.
  • Secure data transfer (S67) through the function of the security module;
  • the security request information is called and the security module is encrypted with the external billing and payment system to receive the secure data.
  • the security module delivers the received information to the flexible browser so that it can be displayed on the screen.
  • Embodiments according to the present invention described above can be implemented in the form of program instructions that can be executed by various computer components and recorded on a computer-readable recording medium.
  • the computer-readable recording medium may include program instructions, data files, data structures, etc. alone or in combination.
  • Program instructions recorded on the computer-readable recording medium may be those specially designed and configured for the present invention, or may be known and available to those skilled in the computer software arts.
  • Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tape, optical recording media such as CD-ROMs, DVDs, and magneto-optical media such as floptical disks. media), and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like.
  • Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.
  • the hardware device may be configured to operate as one or more software modules to perform the process according to the invention, and vice versa.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Databases & Information Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

La présente invention concerne un système de diffusion mettant en œuvre un service de contenu interactif dans un environnement universel, plus particulièrement, un système de diffusion mettant en œuvre un service de contenu interactif dans un environnement universel, permettant d’obtenir un système de communications de diffusion comportant un terminal de réception (par exemple, un système IPTV, un système de télévision par câble, et autres), un système H/E ou analogue. Selon un mode de réalisation de la présente invention, un système de diffusion mettant en œuvre un service de contenu interactif comporte : une section de tête de réseau pour le codage et le multiplexage de données de diffusion selon une norme donnée ; une section de gestion d’information d’événement pour la gestion d’information d’événement contenant au moins une information d’organisation de programmes de diffusion et une information de canal actif associé aux données de diffusion ; une section universelle pour la fourniture d’un contenu interactif incorporé avec les données de diffusion à un terminal récepteur, en référence à l’information d’événement, le contenu interactif étant fourni avec au moins une parmi une donnée vidéo et une donnée audio des données de diffusion ; et une section de fourniture de données pour déterminer, sous l’autorité de l’abonné du terminal de réception, si les données de diffusion et le contenu interactif doivent être fournis.
PCT/KR2009/003312 2008-06-26 2009-06-19 Système et procédé de diffusion mettant en œuvre un service de contenu interactif dans un environnement universel WO2009157675A2 (fr)

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KR10-2008-0061244 2008-06-26
KR1020080061244A KR20100001373A (ko) 2008-06-26 2008-06-26 유비쿼터스 환경의 양방향 컨텐츠 서비스를 이용한 방송시스템

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KR20030054104A (ko) * 2001-12-24 2003-07-02 한국전자통신연구원 다수의 프로파일 정보 정합을 통한 컨텐츠 개인화 장치 및방법
KR20030022838A (ko) * 2003-02-24 2003-03-17 학교법인 한국정보통신학원 멀티미디어 컨텐츠 적응/처리를 이용한 사용자 특성 및환경 기반 멀티미디어 서비스 시스템과 방법 및 그 기록매체
KR20070040598A (ko) * 2005-10-12 2007-04-17 한국전자통신연구원 일체형 포탈서비스 시스템 및 방법과, 이를 위한 사용자단말장치

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