KR100597404B1 - Method and apparatus for transferring home media center?s media contents apart from home media center - Google Patents

Abstract

In a home media center and a thin media client constituting a home network, a method and apparatus for providing a media content to a thin media client are provided.

The remote thin media client can use the GUI information of the remote home media center to use the media content of the home media center. The media content of the home media center is transmitted to the thin media client through streaming.

Home Network, UPnP, Media Server, Media Renderer, Streaming Server

Description

Remote mediation method and apparatus for home media center {Method and apparatus for transferring home media center ’s media contents apart from home media center}

1 is a conceptual diagram illustrating a configuration of a home network composed of a home media center and a thin media client according to an exemplary embodiment of the present invention.

2 is a flowchart illustrating a process of providing media content by a home media center through a thin media client according to an exemplary embodiment of the present invention.

3 is a flowchart illustrating a process of transmitting media content to a multimedia device connected to a home media center according to an embodiment of the present invention.

4 is a conceptual diagram illustrating that a multimedia device connected to a home media center and a thin media client has functions of a media server and a media renderer in a UPnP environment according to an embodiment of the present invention.

5 is a block diagram showing the structure of a home media center according to an embodiment of the present invention.

6 is a block diagram showing the structure of a thin media client according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: home media center 200: thin media client

300: multimedia output device 301: TV

500 control point

The present invention relates to a home network, and more particularly, to an apparatus and a method for transmitting multimedia content received or stored in a home media center to a remotely located home network device.

As the demand for PCs in the home is increasing and various multimedia contents are provided through internet access and data sharing, the home network related market regarding the combination between home multimedia terminals and the PC is emerging. A home network means that two or more devices in a home communicate with each other.A home network used in a home is a data network that connects various peripheral devices around a PC and shares the Internet usage. There is an AV network for transmission of multimedia data between products.

On the other hand, in order to configure such a home network, it is necessary to connect by wire or wireless in each home period, and then, middleware for controlling and interworking the connected devices is needed. Wired technologies include telephone lines, power lines, Ethernet, IEEE 1394 and USB, and wireless technologies include IEEE 802.11x-based wireless LAN, HomeRF, Bluetooth, UltraWideBand (UWB), Zigbee, and HiperLAN. The interlocking technologies include Universal Plug and Play (UPnP), Home Audio Video interoperability (HAVi), and Jini.

Universal Plug and Play (UPnP) is a defacto industry standard that many companies have formed to form the UPnP Forum (http://www.upnp.org). The UPnP network is composed of a control point for controlling a device and a plurality of devices for providing a service. Therefore, the control point CP provides a user interface, and the user can input a command to the control point through the user interface to find (discovery, description) and control various devices. Do. In addition, by configuring the network using the IP protocol between the control point and the device, even if the data network, the AV network, and the control network in the home communicate with each other using different physical media, integrating the IP into only one network is supported. It is possible.

Currently, the UPnP device architecture version 1.0 uses Internet protocols such as TCP / IP and HTTP, and technologies such as eXtensible Markup Language (XML) and Simple Object Access Protocol (SOAP).

The protocol stack structure for the UPnP network configuration includes a network layer including IP, a transport layer including UDP and TCP, HTTP, eXtensible Markup Language (XML), and a simple object access protocol (SOAP). , Presentation / Session Layer including protocols such as Simple Service Discovery Protocol (SSDP) and technologies such as GENA (Generic Event Notification Architecture), UPnP devices, forums, operators, etc. It is composed of an application layer containing information. In the UPnP network system applying the UPnP protocol stack, communication between a control point (hereinafter, abbreviated as 'CP') and a device is defined in six steps as follows.

(1) Addressing step in which devices are assigned IP addresses

(2) Discovery step where CPs discover the presence of a device

(3) Description step in which the CP obtains a device and service information supported by the device;

(4) Control step in which the CP calls a device service

(5) Eventing step in which the device notifies the CP of its state change

(6) Presentation stage in which the device shows its status and control information

Thus, by using the functions defined above, the user can configure a home network without complicated network settings.

On the other hand, when the home network is wired, there is a problem in that movement of devices that are components is limited. In addition, when wirelessly configured, all of these devices are free to move, and all devices must be equipped with a wireless transmission and receiver for communication through wireless, which requires a lot of economic and technical costs. In addition, in the case of a large number of users of the home network, in order to meet their needs, the display can be used on various devices by separating the complicated functions of storing, transmitting and receiving multimedia, and a relatively simple function of playing the multimedia. It is necessary to centralize the functions of managing and processing the data so that a plurality of users can simultaneously use various functions of the home media center.

Therefore, there is a need to develop a home media center and a thin media client having a client / server structure capable of transmitting a multimedia output device to a TV or an audio set regardless of whether the multimedia transmission or reception is wired or wireless. In the past, client / server systems for managing home networks have been proposed, but only for managing UPnP compatible devices. In addition, UPnP proposes the concept of a media server and a media renderer, but this means that the media server only transfers the data to the media renderer under the control of the control point, and it is insufficient for the user to make a direct content request to the home media server. there is a problem.

The technical problem to be achieved by the present invention is to provide a home media center that can be used and watch a variety of multimedia information freely under a home network and a thin media client that can be used in a number of devices through a variety of wired, wireless network In other words, multiple users can simultaneously use various functions of the home media center.                         

Another technical problem to be achieved by the present invention is to enable the home media center and the thin media client to exchange GUI information remotely in order to use the functions of the home media center.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, a remote relay method of a home media center according to an embodiment of the present invention is a device that is located remotely from a home media center, the GUI information transmitted by the home media center, and receives the received GUI Transmitting the information to the multimedia output device; Receiving selection information on the GUI information from the multimedia output device and transmitting the selection information to a home media center; And receiving the media content from the home media center receiving the selection information, and transmitting the received media content to the multimedia output device.

Specific details of other embodiments are included in the detailed description and the drawings.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Referring to the names to be mentioned in the present specification are as follows.

The home media center manages the input / output of media in the home network system and functions as a server for storing and managing media information. The home media center includes a video processor capable of decoding image information, a video memory, and a stream demux. Home media centers have network adapters to support wired and wireless networking, and include storage devices (hard disk drives, CDs, etc.) for storing broadcast and multimedia content. The home media center processes and manages the media information and sends the media material to the thin media client or the multimedia output device, which sends it back to the multimedia output device for the user to view the multimedia information. In addition, the home media center to be described in one embodiment of the present invention has a GUI server and an application module for providing a Graphical User Interface (GUI). This will be described later.

On the other hand, the thin media client receives and transmits the multimedia information sent from the home media server, and allows the user to watch it. Of course, the home media center may be directly connected to the multimedia output device, and one or more thin media clients may be combined with the home media center. The thin media client can use the functions provided by the home media center through a GUI client that accesses the GUI server of the home media center.

The multimedia output device refers to a device that outputs multimedia content as an image or sound. TVs and audio sets are the same, and PCs, mobile phones, PDAs, and notebooks are also multimedia output devices because they have a function of outputting video or sound.

So far, we have looked at the devices and techniques constituting an embodiment of the present invention. Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

1 is a conceptual diagram illustrating a home network including a home media center and a thin media client according to an embodiment of the present invention. The home media center 100 functions to store and process media and manages media management of a home network. To this end, the home media center 100 requires modules for storing media received through broadcasting and modules for processing video and audio information. Meanwhile, the home media center 100 mentioned in the present specification may directly output media to other multimedia devices, and has a function of transmitting media to the thin media client 200 which will be introduced in the present specification. The thin media client 200 receives a multimedia information transmitted from the home media center 100 and outputs the multimedia information to the multimedia device. Functions related to the processing of the multimedia information, the network function, and the use of the multimedia broadcasting are performed in the home media center 100, and the multimedia information stored or received by the home media center 100 is one or more thin media connected through a network. It can be used by the client 200. In FIG. 1, a thin media client 200 connected to one home media center 100 by wire or wirelessly receives multimedia content and transmits the multimedia content to each multimedia output device. The thin media client 200 may exist independently or may be embedded in a multimedia output device. Of course, the media content of the home media center 100 may be directly transmitted to the multimedia output device 301. Wired or wireless connection between the home media center 100 and the thin media client 200 means connection via a wired or wireless network, which will be described later.

In FIG. 2, when the home media center 100 sends media to the thin media client 200, the thin media client 200 receives the media and transmits the media to the multimedia device 301 such as a TV. First, the thin media client 200 requests the home media center 100 to access a remote UI server (S201). This remote UI server functions as a UI server for the TV 301 via the thin media client 200 to use the functions of the home media center 100. To exchange this UI information, it can operate as a GUI server and client structure. The GUI server and the GUI client are divided according to how the GUI information is processed.

The GUI client is the part that interacts directly with the user. It receives a user's input by a touch screen, a mouse, a keyboard, a remote control, and the like, and performs an operation such as displaying information necessary for the user or an output of the user's input to a TV, a computer monitor, a PDA, and the like. On the other hand, the GUI server has the function to receive the information input from the GUI client and perform the appropriate operation, and provides information related to what and how to be shown to the GUI client after completing this operation. Therefore, when a user receives and views multimedia information through the thin media client, the GUI client operates with the GUI server of the home media center. The GUI server determines what multimedia information the home media center should send to the thin media client. It tells you. In addition, the GUI client receives and shows information (such as information on media selection or processing result of information previously input by the user) from the GUI server to the user. In this specification, the RFB (Remote Frame Buffer) method is used for such a task, but this is an embodiment for implementing the present invention, and various techniques may be applied in implementing such a GUI server / client.

RFB (Remote Frame Buffer, hereinafter referred to as 'RFB') is a protocol that allows remote access to the GUI. Since RFB is done at the frame buffer level, it is applicable to all window systems and to frame-based systems such as X11, Window3.1 / 05 / NT, and Macintosh. The RFB protocol defines the exchange of information between the RFB server and the RFB client. The RFB client performs the function of directly inputting keys, mouse, etc., and viewing information through output devices such as terminals. The RFB server processes user input, processes what information the RFB client will show, and sends it to the RFB client through the RFB protocol. This structure is called thin client structure because it performs the most basic input and output functions in the client part and performs the remaining complex processing on the server side. In an embodiment of the present invention, the GUI server of the home media center performs the function of the RFB server, and the GUI client of the thin media client performs the function of the RFB client. In this case, the thin media client can provide GUI functionality without the complex processing capabilities for GUI processing.

To exchange the UI information, a protocol such as RFB described above may be used, and a GUI environment may be established through other protocols. In response to the request of the thin media client, the home media center executes an instance of the remote UI application (S203). This is a server program that allows the thin media client 200 to use the Remote UI. Next, a communication channel for exchanging information between the server program (instance of the remote UI application) and the thin media client 200 is set (S205). The home media center 100 uses the thin media client (S205) through the above-described RFB protocol. In step 200, GUI data is transmitted. The GUI information sent from the home media center 100 becomes GUI information related to selection of a broadcast received by the home media center 100 or selection of stored media. The received thin media client 200 outputs GUI data to the TV 301, and the user selects a broadcast or plays back media through the TV 301. The information transmitted includes the choice of broadcast or media, but also includes the use of various functions provided by the home media center. The TV 301 transmits the selected information to the thin media client 200 (S211), and the thin media client 200 transmits the information to the home media center 100 (S213).

If the user selects a certain broadcast or a certain media to play through the thin media client 200, a process for allowing the user to enjoy the media through the TV is now required. However, since the broadcast or media is in the home media center 100, a process of delivering multimedia content to the thin media client 200 is required. Accordingly, the home media center 100 requests the thin media client 200 to run a streaming client program (S215), and the thin media client drives the streaming client according to the request (S217). In step S219, a message is transmitted. Of course, this may allow the thin media client 200 to drive itself and send a completion message. When the above-described operation is completed, the home media center 100 transmits the received or stored media to the streaming client of the thin media client 200 through the streaming server (S221). In this case, media that is not encoded in MPEG-2 may be encoded and transmitted in MPEG-2, and the thin media client 200 decodes it again. And if it is sent to the TV (S223) the user can watch the media.

3 illustrates a method of transmitting media content to a multimedia device connected to the home media center 100. The multimedia device 301 shown as a TV in the drawing requests that a local GUI application for operating a function of the user's home media center 100 is driven (S101). Of course, this may also be the home media center 100 itself to run a local GUI application, even if the request is not from the TV. A user may use a function of the home media center 100 to select a media to be stored or broadcast through a user interface (hereinafter referred to as 'UI') displayed on a TV by a local GUI application. In order to drive the local GUI application, in order to send GUI information, first, GUI data is stored in the graphic frame buffer (S103), and the GUI data stored in the graphic frame buffer is transmitted to the TV 301. The GUI data may contain information for selecting a user's media. For example, the GUI data may include a broadcast list, a broadcast time, or a DVD and a list and time of media stored on a hard disk. This may be implemented in the form of an electronic program guide (EPG). When the TV 301 that has received the GUI data displays the GUI data on the screen as an output device (S107), the user can perform a function of the home media center through the TV, for example, receiving a broadcast or playing back stored multimedia content. The selection is made (S109). The selection information is transmitted to the home media center 100 (S113). Accordingly, the home media center 100 performs broadcasting, playing a predetermined function, or playing the stored multimedia data (S113). Broadcast or multimedia information is output to the TV (301).

Home networking refers to the sharing of digital data and the use of broadband communications by establishing a network in the information period in the home, such as PCs, mobile phones, digital TVs, personal digital assistants (PDAs), and game consoles. Broadly speaking, it includes software and services for integration and operation between information devices as well as wired and wireless network equipment. The basic structure of home networking consists of home gateways that connect internal and external networks, telecommunication networks in the home such as telephone lines, power lines, and wireless, middleware that controls and interoperates information devices, and information devices with added home networking functions.

The following describes the wired and wireless networks for the connection between home media centers and thin media clients, or devices. Network technology to be used in one embodiment of the present invention uses a wired, wireless network method introduced below.

Wired and wireless technologies are used to connect devices in the home network. In the case of wired, Ethernet, HomePNA, power line control (PLC), IEEE 1394, USB (Universal Serial Bus), DVI (Digital Visual Interface) and HDMI (High Definition Multimedia Interface). Each of them is as follows.

1) Ethernet

Networking technology based on the IEEE 802.3 standard, a LAN technology that has long been proven in data communications. It is the foundation of home networks, including corporate networks, and is attracting attention for its speed (currently 10Mbps and 100Mbps), safety, high reliability and, above all, lower cost than competing technologies.

2) HomePNA

HomePNA, which is emerging as the backbone technology of the home network, can connect information and communication devices to one network using existing home telephone lines and establish a LAN environment without additional equipment such as a hub or router. HomePNA 2.0 at 10 Mbps is becoming the standard.

3) Power Line Communication (PLC)

PLC converts communication signal into high frequency signal of 100KHz ~ 30MHz by using power line installed in home or office, and receives signal using high frequency filter when receiving.It has been used for data transmission for almost 20 years. do.

4) IEEE 1394

IEEE 1394, also known as FireWire, is a next-generation core technology that enables high-speed, real-time data transmission as a serial bus-based digital interface technology that is gained thanks to the digitization of AV devices and the provision of a multimedia environment. Up to 63 terminals can be connected, and IEEE 1394a can communicate at speeds of up to 400Mbps at 4.5m and IEEE 1394b at 800 ~ 1600Mbps at 100m.

5) Universal Serial Bus (USB)

USB has the advantages of being a Human Interface Device (HID), easy connection to peripherals, sufficient interrupt request (IRQ) resources, and support for Plug and Play (PNP) features, while relatively low power sources The high CPU share is pointed out as a disadvantage.

6) Digital Visual Interface (DVI) and High Definition Multimedia Interface (HDMI)

DVI and next-generation HDMI are HDCs (video over DVI and video and audio over HDMI) as digital interconnects, enabling secure, uncompressed transmission. These technologies deliver stable transmission efficiency and can deliver high-precision content (including eight channels via HDMI). Many recent HDTV models, including PC monitors, have DVI. Along with IEEE1394, it is competing as a solution for A / V device networking.

Recently, as the research on wireless technology has been actively conducted, attempts have been made to overcome the limitations of mobility of wired communication, and many researches have been conducted on wireless home networks. The wireless communication is as follows.

1) IEEE802.11x

It is emerging as a wireless home networking technology because it does not require cable wiring and is a form of communication that can be connected to the base LAN even when mobile, and the LAN configuration is quick and the network structure can be easily changed. There are various wireless technology standards such as 802.11b, 802.11a, 802.11g, 802.11e and 802.11i. Among them, 802.11b is a standard competition between HomeRF and wireless home networking technology, but recently, due to the high speed and high volume of products, Has an edge in.

2) Home Radio Frequency (HomeRF)

Standardized by companies leading the PC, peripherals, communications, software, and semiconductor industries, the standard for the SWAP (Shared Wireless Access Protocol) 1.1 standard has been completed. It aims to build a home network using RF method, not infrared.

3) Bluetooth

It is a low-power, low-cost, short-range wireless communication technology that enables communication between various devices within a distance of about 10m.In the early days, it was limited in the scope of application, but recently, its functions have been expanded so that personal communication devices such as mobile phones and PDAs, headsets / keyboards PC peripherals such as / speakers / printers, and a personal area network (PAN) construction technology between devices connected to a wired PC has been in the spotlight.

4) Ultra-wideband (UWB)

It was primarily used for special purposes such as military radar or remote detection, and was licensed as a commercial technology by the FCC in February 2002. In the early stages of application in the field of communication, evaluation samples of UWB chipsets for wireless video transmission such as VTRs and DVD players have been released. Since 2003, development of 100Mbps chips for wireless video transmission in homes is expected.

The media server and the media renderer are components of the UPnP AV system. The media server and the media renderer transmit a media content of a device (device) to another device and play it on another device.

The media server is a general purpose device and is an apparatus for providing AV content to other UPnP devices. Therefore, the media server may include a conventional VCR, CD player, DVD player, PC, TV tuner, and set-top box. Of course, because media servers provide media content to other devices, the ability to play media is not essential. Media renderers, on the other hand, require a playback function to play the media content provided. Unlike a media server, a media renderer does not have the ability to provide media content to other devices. The home media center in the present specification has a function of a media server according to the UPnP AV standard, and supplies data to other devices, and simultaneously plays media contents on a multimedia output device such as a TV or a screen connected directly to the home media center. It also has the function of a media renderer. 'Direct' here means not just wired, but also wired and wireless, and works without the participation of other thin media clients.

FIG. 4 shows that the aforementioned home media center 100, the thin media client 200, and the combined multimedia devices function as media servers and media renderers in a UPnP environment. As described above, the media server has a function of transmitting media content to another UPnP device, and the media renderer has a function of receiving and playing such content. The thin media client 200 that receives the media content from the home media center 100 and the multimedia device 301 that plays the media content provide a function of the media renderer. The home media center 100, the thin media client 200, and the multimedia device 301 are each UPnP devices and are controlled through a control point application. The control point application may exist independently and the home media center 100 may be responsible for this function.

The terms 'component', 'device', and 'module' used in this embodiment mean software or hardware components such as an FPGA or an ASIC, and the components, devices, modules, etc. perform certain functions. However, the module is not limited to software or hardware. The module may be configured to be in an addressable storage medium and may be configured to play one or more processors. Thus, as an example, a module may include components such as software components, object-oriented software components, class components, and task components, and processes, functions, properties, procedures, subs, and so forth. Routines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. The functionality provided within the components and modules may be combined into a smaller number of components and modules or further separated into additional components and modules. In addition, the components and modules may be implemented to play one or more CPUs in a device or secure multimedia card.

5 shows a configuration for functioning the home media center 100 described above. The home media center 100 may have a DVD-ROM 191 and a hard disk 192 for storing contents. And a tuner 193 for receiving digital broadcast. These devices are all exemplary devices for receiving and storing content. There is a CPU 112 for controlling the storage medium and a memory 111 for assisting the CPU in processing the work. In addition to the work of the storage medium, the CPU is responsible for information exchange and control of various devices constituting the home media center 100. Next, there is a stream demux 170 that controls a media stream input through the tuner 193, a video processor 122 that processes video information, and a video memory 121 that stores and extracts video information. There is). The GUI module 131 is, first, a function of a local UI application that allows a user to select information of the home media center 100 through the TV when the home media center 100 directly sends media to an output device such as a TV. Secondly, the thin media client 200 performs a function of a remote GUI server to use the information of the home media center 100. Information generated by the GUI module is transmitted to the thin media client 200 through the graphic frame buffer 132. Next, we look at the modules involved in the delivery of media content. When the home media center 100 directly outputs to a video device such as a TV, the video decoder 141 and the video frame buffer 142 are used. The video decoder 141 decodes video information compressed and transmitted in various formats, and the video frame buffer 142 outputs the decoded information. Next, when the home media center 100 transmits media content to the thin media client 200, the MPEG-2 encoder 150 and the streaming server 155 are used. The MPEG-2 encoder 150 decodes the media content received or stored in various formats by the video decoder 141 and encodes the media content into the MPEG-2 encoder 150 again. This means that the encoding can be received by the thin media client 200. An encoder other than the MPEG-2 scheme may exist, and MPEG-2 is exemplary. Of course, if it is already encoded in MPEG-2 will be transmitted directly to the thin media client 200 without decoding again. The streaming server 155 transmits the encoded media content through streaming. The network adapter 160 is responsible for data transmission with other devices. Of course, this network adapter can be used including the techniques listed among the above-mentioned wired and wireless networks. The data exchange between modules can use the bus, but is not limited to the PCI bus.

6 illustrates the structure of the thin media client 200. First, there is a CPU 221 and a memory 211 which are responsible for processing media information, driving a GUI application for exchanging information with the home media center 100, and exchanging information between modules. Next, there is a network adapter 260 in charge of data transmission and reception with the home media center 100. This network adapter 260 includes the above-described wired and wireless network technologies. The remote UI client 231 performs UI related tasks. Remote UI client 231 receives the UI information transmitted by the home media center 100 and displays the function on the TV, and transmits UI information input from the user to the home media center 200 through the network adapter. Client 231 performs. A predetermined protocol is used between the remote UI client 231 and the GUI module 131 of the home media center. The above-described RFB may be used. The streaming client 255 receives the media content transmitted by the streaming server 155 of the home media center 100, passes it to the video decoder 241, and decodes and outputs the MPEG-2 encoded content. Of course, as described above, it may be implemented in a method other than MPEG-2 according to the encoding method.

The configuration described in FIGS. 5 and 6 divides the internal structures of the home media center and the thin media client described above into respective functions, and two or more modules can perform one function, and one module performs two or more functions. can do. Each module can also be configured in software or hardware.

Those skilled in the art will appreciate that the present invention can be embodied in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is indicated by the scope of the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalent concept are included in the scope of the present invention. Should be interpreted.

By implementing the present invention, a plurality of thin media clients are responsible for outputting media content processed by a home media center, so that a larger number of users can freely use the functions of the home media center.

In addition, the present invention allows the user interface of the home media center to be used through the thin media client, so that the functions of the home media center can be remotely used.

Claims (8)

Receiving GUI information transmitted by a home media center that functions to store and process media and manages media management of a home network, and transmits the received GUI information to a multimedia output device; Receiving selection information on the GUI information from the multimedia output device and transmitting the selection information to a home media center; Receiving the media content from the home media center receiving the selection information, and transmitting the received media content to a multimedia output device. The method of claim 1, The GUI information is received and the selection information is transmitted based on communication with a remote UI server of a home media center. Communication with the UI server is a remote relay method of the home media center using a remote frame buffer (RFB) protocol A remote UI client configured to store and process media and to transmit and receive GUI information to and from a home media center that manages media management of a home network; A streaming client receiving media content transmitted from a home media center; A video decoder for decoding the received media content; A network adapter for exchanging information with a home media center; A central processing unit responsible for controlling the devices and exchanging information between the devices; And A remote relay device of a home media center including a memory storing data of the central processing unit The method of claim 3, wherein The remote UI client communicates with the remote UI server of the home media center, The remote relay device of the home media center, wherein the communication is performed using a remote frame buffer (RFB) protocol. The method of claim 3, wherein A remote relay device of a home media center further comprising a multimedia output device for playing media content decoded by the video decoder. Transmitting GUI information to a device that requires media content by a home media center that functions to store and process media and oversees media management of the home network; Receiving selection information on the received GUI information from the device; Transmitting a media content according to the selection information to the device; The method of claim 6, The remote relay method of the home media center that the GUI information is transmitted and received based on the remote frame buffer (RFB) protocol A GUI processor for transmitting GUI information to another device, receiving selection information transmitted from the device, and transmitting the GUI information and receiving the selection information using a remote frame buffer (RFB) protocol; A streaming server having a function of streaming and transmitting media content; A video processor for transmitting media content to the other device through the streaming server; A network device unit for transmitting and receiving information with another device; A central processing unit responsible for controlling the devices and exchanging information between the devices; And A home media center that includes a memory for storing data of the central processing unit, and functions to store and process media and to manage media management of a home network;

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