KR20080003162A - Gateway and method for transforming terrestrial dmb conents - Google Patents

Abstract

A method and a gateway for converting terrestrial DMB(Digital Multimedia Broadcasting) contents and a system and a method for transmitting terrestrial DMB are provided to convert the terrestrial DMB contents in consideration of construction of the terrestrial DMB contents according to a characteristic of various networks, thereby providing efficiently a terrestrial DMB service through the various networks as well as a dedicated terrestrial DMB network. An ETI(Ensemble Transport Interface) demultiplexing unit(301) divides the terrestrial DMB contents of an EIT frame format into an FIC(Fast Information Channel) and an MSC(Main Service Channel). An SDP(Session Description Protocol) packet processing unit(302) constitutes an FIC as the SDP packet. A TCP/IP(Transmission Control Protocol/Internet Protocol) constituting unit(303) constitutes the SDP packet as the TCP/IP packet. An RTP(Real-Time Transport Protocol) packet processing unit(304) constitutes the MSC as an RTP packet. An UDP/IP(User Datagram Protocol/Internet Protocol) constituting unit(305) constitutes the RTP packet as an UDP/IP packet. An IP outputting unit(306) transmits the TCP/IP packet and the UDP/IP packet to an IP network.

Description

Gateway and method for transforming terrestrial DMB conents}

1 is a configuration diagram of a terrestrial DMB service providing system to which the present invention is applied;

2 is a conceptual diagram of a gateway according to an embodiment of the present invention;

3 is a detailed configuration diagram of a first content conversion unit of FIG. 2;

4 is a detailed configuration diagram of a second content conversion unit of FIG. 2;

FIG. 5 is a detailed configuration diagram of the third content converter of FIG. 2;

6 is a flowchart of a method for converting terrestrial DMB content according to an embodiment of the present invention;

7 is a detailed flowchart of the FIC conversion method of FIG. 6;

8A to 8C are detailed flowcharts of the MSC conversion method of FIG. 6.

* Explanation of symbols on the main parts of the drawings

100: DAB audio encoder 200: DAB data encoder

300: multimedia encoder 400: ensemble multiplexer

500: Gateway 600: COFDM Encoder

The present invention relates to a terrestrial digital multimedia broadcasting (DMB) technology, and more particularly, to a terrestrial DMB content conversion method and gateway for converting terrestrial DMB contents to provide terrestrial DMB services through various communication networks as well as terrestrial DMB dedicated networks. will be.

Terrestrial DMB technology provides terrestrial DMB services by transmitting terrestrial DMB contents such as audio, data, and multimedia to predetermined user terminals while moving through a terrestrial DMB network. Current terrestrial DMB networks are dedicated networks (hereinafter referred to as terrestrial DMB dedicated networks) consisting of dedicated interface technologies such as Service Transport Interface (STI), Ensemble Transport Interface (ETI), and EN 300-401 Coded Orthogonal Frequency Division Multiplexing (COFDM). Has a data rate. Since the terrestrial DMB dedicated network generates a high-density coded DMB-only content (hereinafter, terrestrial DMB content) so that terrestrial DMB services can be provided, it is possible to provide terrestrial DMB services such as video even at a low data rate.

In the past, terrestrial DMB contents were generally provided only through a terrestrial DMB dedicated network. However, as terrestrial DMB services are activated, terrestrial DMB contents are diversified. The needs of users are increasing.

In connection with this, there is a technology for transmitting terrestrial DMB contents through an Internet Protocol (IP) network. However, these techniques only provide the concept of transmitting terrestrial DMB contents to an IP network. This is a problem that does not take into account the characteristics of various IP networks, and overlooks the characteristics of multimedia transmission technology and the configuration of terrestrial DMB content generated by the current DMB standard through the IP network in which media information and control information are transmitted separately. Thus, it is uncertain whether terrestrial DMB content transmission is practically possible through the IP network. Therefore, in consideration of the characteristics of various communication networks and the configuration of terrestrial DMB contents, a system for providing a terrestrial DMB service through an IP network is required.

The present invention has been proposed to meet the above demands, and by converting the terrestrial DMB content in consideration of the characteristics of various communication networks and the composition of terrestrial DMB content, the terrestrial DMB service is efficiently provided through not only a terrestrial DMB dedicated network but also various communication networks. The purpose of the present invention is to provide a terrestrial DMB content conversion method and gateway.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. It will also be appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

In order to achieve the above object, the present invention provides an ETI demultiplexing system for terrestrial DMB content conversion gateway that separates terrestrial DMB content in an ensemble transport interface (ETI) frame format into a fast information channel (FIC) and a main service channel (MSC). Way; SDP packet processing means for constructing the FIC as a Session Discription Protocol (SDP) packet; TCP / IP constructing means for constructing the SDP packet into a Transmission Control Protocol / Internet Protocol (TCP / IP) packet; RTP packet processing means for configuring the MSC into a Real-time Transport Protocol (RTP) packet; UDP / IP constructing means for constructing the RTP packet into a UDP / IP (User Datagram Protocol / Internet Protocol) packet; And IP output means for transmitting the TCP / IP packet and the UDP / IP packet to an IP network.

In addition, the present invention provides a method for converting terrestrial DMB content, comprising: a first step of demultiplexing terrestrial DMB content in an ETI frame format into a FIC and an MSC; A second step of configuring the FIC as an SDP packet and configuring the SDP packet as a TCP / IP packet; A third step of constructing the MSC into an RTP packet and configuring the RTP packet into a UDP / IP packet; And a fourth step of transmitting the TCP / IP packet and the UDP / IP packet to an IP network.

In addition, the present invention provides a terrestrial DMB service providing system comprising: an encoder for encoding DAB audio, DAB data, and a multimedia source as terrestrial DMB content; An ensemble multiplexer for generating the DAB audio, DAB data, and multimedia sources in an ETI frame format; A gateway for transmitting terrestrial DMB content in the ETI frame format to a Coded Orthogonal Frequency Division Multiplexing (COFDM) encoder to access a terrestrial DMB dedicated network, or converting the terrestrial DMB content in the ETI frame format into an IP format to access an IP network; And the COFDM encoder for modulating an ETI frame transmitted from the terrestrial DMB content conversion gateway to the terrestrial DMB dedicated network by modulating the ETI frame using the COFDM scheme, wherein the gateway is configured to transmit the terrestrial DMB content in the ETI frame format to FIC and MSC. Separately, the FIC converts the packet into the IP format by the SDP and the TCP / IP protocols, and the MSC converts the packet into the IP format by the RTP and UDP / IP protocols.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a terrestrial DMB service providing system to which the present invention is applied.

As shown in FIG. 1, the system for providing a terrestrial DMB service to which the present invention is applied includes a digital audio broadcasting (DAB) audio encoder 100, a DAB data encoder 200, a multimedia encoder 300, and an ensemble multiplexer. 400, gateway 500, and coded orthogonal frequency division multiplexing (COFDM) encoder 600.

The DAB audio encoder 100, the DAB data encoder 200, and the multimedia encoder 300 encode DAB audio sources, DAB data sources, and multimedia sources, which are terrestrial DMB contents, according to the Digital Multimedia Broadcasting (DMB) standard, respectively. Output to firearm 400.

The ensemble multiplexer 400 receives each encoded DAB audio / DAB data / multimedia source output from the encoders 100, 200, and 300 to generate an Ensemble Transport Interface (ETI) frame and outputs it to the gateway 500. Here, the ETI frame includes a main service channel (MSC) including terrestrial DMB content information (DAB audio / DAB data / multimedia information), and control information (terrestrial DMB content configuration information, service information, etc.) for controlling terrestrial DMB content. It consists of an FTI (Fast Information Channel) including and an ETI header including overall information on the configuration of the ETI frame. That is, according to the current terrestrial DMB standard, terrestrial DMB content is generated by the ensemble multiplexer 400 in an ETI frame format composed of MSC, FIC, and ETI headers.

The gateway 500 transmits the terrestrial DMB content generated in the ETI frame format to the COFDM encoder 600 as it is or according to the network to which the terrestrial DMB service providing system is connected, or converts it into an IP (Internet Protocol) format. That is, when the network to which the terrestrial DMB service providing system is connected is a terrestrial DMB dedicated network, the gateway 500 passes the terrestrial DMB content of the ETI frame format as it is and passes it to the COFDM encoder 600, and the COFDM encoder 600 transmits the COFDM. Modulate according to the scheme and transmit it to the terrestrial DMB dedicated network. On the other hand, if the network to which the terrestrial DMB service providing system is connected is a variety of IP-based communication networks other than the terrestrial DMB-only network, the gateway 500 converts the terrestrial DMB contents of the ETI frame format to the IP format based on the characteristics of the various IP-based communication networks. . The detailed configuration of the gateway 500 according to the characteristics of various communication networks will be described in more detail with reference to FIGS. 2 to 5 below.

By adding the terrestrial DMB content conversion gateway 500 to the conventional terrestrial DMB system as described above, the terrestrial DMB service providing system to which the present invention is applied can simultaneously transmit terrestrial DMB contents to a terrestrial DMB dedicated network and various other communication networks. .

2 is a conceptual diagram of a gateway according to an embodiment of the present invention.

As shown in FIG. 2, when the terrestrial DMB service providing system to which the present invention is applied is connected to a terrestrial DMB dedicated network, the gateway 500 directly passes the terrestrial DMB content of an ETI frame format, thereby accessing the terrestrial DMB dedicated network. A predetermined user terminal (terrestrial DMB dedicated phone, etc.) may be provided with terrestrial DMB content by a conventional terrestrial DMB service providing method without the influence of the added gateway 500.

In addition, since the terrestrial DMB service providing system to which the present invention is applied should be able to be connected to various communication networks other than the terrestrial DMB dedicated network, the gateway 500 converts the terrestrial DMB contents in the most suitable manner in consideration of characteristics of various communication networks. To this end, it has a plurality of content conversion units corresponding to each of various communication networks.

As an example of the present specification, various communication networks include an IP-based communication network, a wired Internet network, a wireless Internet network (Wireless LAN, Wibro, etc.) and a mobile communication network (CDMA (Code Division Multiple Access), GSM (Global System for Mobile Communications). ), Etc.). Among these classified networks, the wired Internet network is the most stable and the transmission bandwidth is widest, the mobile communication network is the most unstable and the transmission bandwidth is narrow. In order to efficiently convert the terrestrial DMB content in consideration of the characteristics of such a communication network, the gateway 500 should also include a separate configuration for each communication network. Thus, as an example of the present specification, the gateway 500 includes three content converters ( The first content converter 210, the second content converter 220, and the third content converter 230 are included. Hereinafter, the wired internet network and the first content converter 210, the wireless internet network and the second content converter 220, and the mobile communication network and the third content converter 230 will be described. It is obvious that change is possible.

FIG. 3 is a detailed configuration diagram of the first content converter of FIG. 2.

As shown in FIG. 3, the first content converter 210 includes an ETI demultiplexer 301, a Session Discription Protocol (SDP) packet processor 302, and a Transmission Control Protocol / Internet Protocol (TCP / IP) component. 303, a Real-time Transport Protocol (RTP) packet processing unit 304, a User Datagram Protocol / Internet Protocol (UDP / IP) configuration unit 305, and an IP output unit 306, as described above. It may be best suited for the Internet.

If the communication network is determined to be a wired Internet network, the terrestrial DMB content of the ETI frame format is input to the first content converter 210. As described above, the ETI frame is composed of an MSC including information of the terrestrial DMB content itself, an FIC including the terrestrial DMB content control information, and an ETI header including information about the ETI frame.

The ETI demultiplexer 301 analyzes the ETI header of the input ETI frame and demultiplexes the ETI frame into the MSC and the FIC, and outputs the FIC to the SDP packet processor 302 and the MSC to the RTP packet processor 304. .

The SDP packet processing unit 302 configures the input FIC as an SDP packet. Here, SDP packet is a packet generated by SDP, a protocol for describing a session in Internet multimedia transmission technology. Session information (session name and purpose, session creator information, media information to be used for session, and media transmission) for terrestrial DMB content is required. Information (address, port, format, etc.). That is, the SDP packet should further include session information other than control information for the terrestrial DMB content included in the FIC. Accordingly, session information required for SDP packet configuration, in addition to the control information for the terrestrial DMB content, is previously inputted from a predetermined user terminal, stored in a predetermined database, and constitutes an SDP packet together with information included in the FIC.

In order to transmit the SDP packet in the IP format, the TCP / IP configuration unit 303 configures the SDP packet input from the SDP packet processing unit 302 into a TCP / IP packet and outputs it to the IP output unit 306. The unit 306 transmits the TCP / IP packet to the wired Internet network.

That is, in converting FIC, which is control information, into IP format, SDP and TCP / IP, which are protocols suitable for FIC characteristics, are converted into IP format packets.

On the other hand, the RTP packet processing unit 304 configures the input MSC as an RTP packet. Here, the RTP packet is a packet generated by RPT, which is a protocol for media transmission in the Internet multimedia transmission technology, and includes information on terrestrial DMB content itself (DAB audio / DAB data / multimedia information). In particular, in the present specification, an RTP packet is configured in consideration of characteristics of terrestrial DMB content transmission. That is, as the size and payload type information of the RTP packet for terrestrial DMB content transmission, for example, the size of the RTP packet is defined in multiples of 8 bytes equal to the size of the terrestrial DMB content, and the payload is The type may be defined as a terrestrial DMB content type.

In order to transmit the RTP packet in the IP format, the UDP / IP configuration unit 305 configures the RTP packet input from the RTP packet processing unit 304 into a UDP / IP packet and outputs it to the IP output unit 306. The unit 306 transmits the UDP / IP packet to the wired internet network.

That is, in converting MSC, which is media information, into IP format, RTP and UDP / IP, which are protocols suitable for MSC characteristics, are converted into IP format packets.

In this way, the terrestrial DMB content is divided into information of the content itself and its control information, and the content itself information is converted by RPT, a protocol for media transmission in the Internet multimedia transmission technology, and the control information is converted into a session in the Internet multimedia transmission technology. By converting and processing by SDP, a protocol for describing, it is possible to implement a terrestrial DMB service providing system that meets the characteristics of the Internet multimedia transmission technology in which media information and control information are transmitted separately.

4 is a detailed block diagram of the second content converter of FIG. 2.

As shown in FIG. 4, the second content converter 220 includes an ETI demultiplexer 401, an SDP packet processor 402, a TCP / IP component 403, an MSC demultiplexer 404, and the like. The decoder 405, the RTP packet processor 406, the UDP / IP component 407, and the IP output unit 408 may be most suitable for a wireless Internet network as described above. Here, the ETI demultiplexer 401, the SDP packet processor 402, the TCP / IP component 403, the RTP packet processor 406, the UDP / IP component 407 and the IP output unit 408 are respectively. ETI demultiplexer 301, SDP packet processor 302, TCP / IP component 303, RTP packet processor 304, UDP / IP component 305 and IP output 306 shown in FIG. Play the same role as).

Since the second content converter 220 corresponds to a wireless Internet network having a relatively unstable network state and a small transmission bandwidth compared to the wired Internet network, additional decoding is required for the MSC to increase transmission efficiency. Accordingly, the second content converter 220 separates and converts the MSC into sub-channels, that is, DAB audio / DAB data / multimedia streams.

The MSC demultiplexer 401 receives the MSC from the ETI demultiplexer 301 and demultiplexes the DAB audio / DAB data stream and the multimedia stream.

Here, the DAB audio / DAB data stream is configured as an RTP packet by the RTP packet processing unit 406 as described above in FIG. 3, and then is configured as a UDP / IP packet by the UDP / IP configuration unit 407 to output an IP output unit. Is output to 408.

On the other hand, the multimedia stream is outer decoded by the outer post encoding unit 405. Here, the external encryption is a process of deleting unnecessary bytes from the multimedia stream, and the DMB-based multimedia stream includes bytes added by outer coding. If the IP-based transmission is assumed, it is added by external encryption. This is because the byte that was written is unnecessary. For example, in the case where the multimedia stream is an MPEG-2 transport stream (TS), the outer decoding unit 405 performs outer decoding on the MPEG-2 multimedia transport stream increased to 204 bytes by external encoding, thereby making it 188 bytes. The MPEG-2 multimedia transport stream may be generated. The multimedia stream decoded by the outer decoding unit 404 is configured as an RTP packet by the RTP packet processing unit 406, and then is configured as a UDP / IP packet by the UDP / IP configuration unit 407, and the IP output unit 408. Is output.

As described above, the second content converter 220 separates and transmits the MSC for each subchannel, and reduces the size of data through an additional external decoding process for the multimedia transport stream. And it is suitable for wireless internet network with narrow transmission bandwidth.

FIG. 5 is a detailed configuration diagram of the third content converter of FIG. 2.

As illustrated in FIG. 5, the third content converter 230 may include an ETI demultiplexer 501, an SDP packet processor 502, a TCP / IP component 503, an MSC demultiplexer 504, and the like. Decoder 505, multimedia stream analysis and demultiplexer 506, video elementary stream (ES) component 507, audio elementary stream component 508, RTP packet processor 509, UDP / An IP configuration unit 510 and an IP output unit 511 may be most suitable for a mobile communication network as described above. Here, the ETI demultiplexer 501, the SDP packet processor 502, the TCP / IP component 503, the RTP packet processor 509, the UDP / IP component 510 and the IP output unit 511, respectively. ETI demultiplexers 301 and 401, SDP packet processors 302 and 402, TCP / IP components 303 and 403, RTP packet processors 304 and 406 and UDP / IP shown in FIGS. The MSC demultiplexer 504 and the outer decoder 505 each play the same role as the components 305 and 407 and the IP output units 306 and 408, respectively. The MSC demultiplexer 404 shown in FIG. And the external decryption unit 405.

Since the third content conversion unit 230 corresponds to a mobile communication network which is more unstable and has a smaller transmission bandwidth than the wired / wireless Internet network, the third content converter 230 may be configured for the multi-media stream output from the external decoding unit 505. Additional decoding is required. Accordingly, the third content converter 230 separates the multimedia stream output from the outer decoder 505 into a video and audio stream and converts the multimedia stream.

The multimedia stream analyzing and demultiplexing unit 506 demultiplexes the multimedia stream inputted from the outer decoding unit 505 into a video transport stream and an audio transport stream.

The video elementary stream constructing unit 507 receives the video transport stream output from the multimedia stream analyzing and demultiplexing unit 506 to demultiplex and depacketize the video elementary stream to form and output the video elementary stream. The video elementary stream is composed of RTP packets by the RTP packet processing unit 509, and is then composed of UDP / IP packets by the UDP / IP configuration unit 510 and output to the IP output unit 511.

In addition, the audio elementary stream constructing unit 508 receives an audio transport stream output from the multimedia stream analyzing and demultiplexing unit 506 to demultiplex and depacketize an audio elementary stream and outputs the audio elementary stream. The audio elementary stream is composed of RTP packets by the RTP packet processing unit 509, and is then composed of UDP / IP packets by the UDP / IP configuration unit 510 and output to the IP output unit 511.

As such, the third content converter 230 separates the multimedia stream into video and audio transport streams, and configures the video and audio elementary streams through additional decoding, thereby further reducing the size of the data so that the state of the network may be reduced. It is suitable for mobile networks that are unstable and have a narrow transmission bandwidth.

6 is a flowchart of a method for converting terrestrial DMB content according to an embodiment of the present invention.

First, the terrestrial DMB content of the ETI frame format is demultiplexed and separated into FIC and MSC (s601). Step s601 is performed in the same manner in the terrestrial DMB content conversion process in all networks regardless of the network status, and this also controls terrestrial DMB contents in accordance with the characteristics of the Internet multimedia transmission technology in which media information and control information are transmitted separately. This is for separate transmission to the information FIC and the media information MSC.

Next, the FIC is converted into an IP-type packet for access to the IP-based communication network (s602). The FIC conversion process of step s602 is performed in the same manner as the terrestrial DMB content conversion process in all networks regardless of the state of the network and will be described in detail with reference to FIG. 7.

In addition, the MSC is also converted into an IP-type packet for access to the IP-based communication network (s603). The MSC conversion process of step s603 has a different conversion path according to the state of the network. For example, in the present specification, three MSC conversion paths are described corresponding to the states of three networks, a wired internet network, a wireless internet network, and a mobile communication network. Hereinafter, a detailed description will be given with reference to FIGS. 8A to 8C.

The IP format packet converted by steps s602 and s603 is transmitted to the IP network (s604), thereby terminating the terrestrial DMB content conversion process according to an embodiment of the present invention.

7 is a detailed flowchart of the FIC conversion method of FIG. 6.

First, control information on terrestrial DMB content included in the FIC is extracted (s701).

 The SDP packet is configured using the control information extracted in step S701 and session information pre-stored in advance from a predetermined user terminal (s702). This is because the session information required for the SDP packet configuration includes information other than the FIC.

Next, by configuring the SDP packet into TCP / IP packets (s703), the FIC conversion process (s602) for converting the FIC into an IP format packet is completed.

FIG. 8A is a detailed flowchart of an MSC conversion method when the MSC conversion method of FIG. 6 corresponds to a wired Internet network.

First, the MSC is composed of an RTP packet (s801). As described above, for example, the size of the RTP packet may be defined in units of multiples of 8 bytes equal to the size of the terrestrial DMB content, and the payload type may be defined as the terrestrial DMB content type.

Next, the RTP packet is composed of UDP / IP packets (s802), thereby completing the MSC conversion process (s603) for connecting to the wired Internet network.

FIG. 8B is a detailed flowchart of an MSC conversion method when the MSC conversion method of FIG. 6 corresponds to a wireless Internet network.

First, the MSC is demultiplexed into DAB audio / DAB data / multimedia streams (s803), among which the multimedia stream is decoded (s804).

The demultiplexed DAB audio / DAB data stream in step s803 and the multimedia stream decoded in step s804 are each composed of RTP packets (s805). As described above, the RTP packet is configured in consideration of the characteristics of the terrestrial DMB content transmission.

Next, the RTP packet is composed of UDP / IP packets (s806), thereby completing the MSC conversion process (s603) for connecting to the wireless Internet network.

FIG. 8C is a detailed flowchart of an MSC conversion method when the MSC conversion method of FIG. 6 corresponds to a mobile communication network.

First, the MSC is demultiplexed into audio / DAB data / multimedia streams in step S803 and step S804 (s807), and the multimedia streams are decoded (s808).

Here, the decoded multimedia stream is demultiplexed into a video transport stream and an audio transport stream (s809), and the video transport stream and the audio transport stream are composed of a video elementary stream and an audio elementary stream, respectively (s810).

The DAB audio / DAB data stream demultiplexed in step s807, the video elementary stream and the audio elementary stream configured in step s810 are each composed of RTP packets (s811).

Next, the RTP packet is composed of UDP / IP packets (s812), thereby ending the MSC conversion process (s603) for connecting to the mobile communication network.

As shown in Figs. 8A to 8C, MSC including media information is decoded differentially according to network characteristics (network instability, transmission bandwidth, etc.), thereby enabling efficient terrestrial DMB content transmission according to various IP network characteristics. Do.

As described above, the method of the present invention may be implemented as a program and stored in a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form. Since this process can be easily implemented by those skilled in the art will not be described in more detail.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

As described above, the present invention can efficiently provide terrestrial DMB services through various communication networks as well as terrestrial DMB networks by converting terrestrial DMB contents in consideration of the configuration of terrestrial DMB contents according to characteristics of various communication networks.

Claims (11)

In the terrestrial DMB content conversion gateway, ETI demultiplexing means for separating terrestrial DMB content in an Ensemble Transport Interface (ETI) frame format into a fast information channel (FIC) and a main service channel (MSC); SDP packet processing means for constructing the FIC as a Session Discription Protocol (SDP) packet; TCP / IP constructing means for constructing the SDP packet into a Transmission Control Protocol / Internet Protocol (TCP / IP) packet; RTP packet processing means for configuring the MSC into a Real-time Transport Protocol (RTP) packet; UDP / IP constructing means for constructing the RTP packet into a UDP / IP (User Datagram Protocol / Internet Protocol) packet; And IP output means for transmitting the TCP / IP packet and the UDP / IP packet to an IP network Terrestrial DMB content conversion gateway that includes. The method of claim 1, The RTP packet processing means, An MSC demultiplexer for demultiplexing the MSC to output digital audio broadcasting (DAB) audio, DAB data, and a multimedia stream; An outer decoding unit for outer decoding the multimedia stream; And And an RTP packet processing unit configured to configure DAB audio and DAB data streams output from the MSC demultiplexer and multimedia streams output from the external decoding unit into RTP packets. Terrestrial DMB Content Conversion Gateway. The method of claim 2, The RTP packet processing unit, A multimedia stream analysis and demultiplexer for analyzing the multimedia stream outputted from the outer decoding unit and demultiplexing the video stream and the audio transport stream; An elementary stream configurator configured to configure the video transport stream and the audio transport stream into a video elementary stream and an audio elementary stream, respectively; And A RTP packet processor configured to configure the DAB audio and DAB data streams output from the MSC demultiplexer and the video elementary and audio elementary streams output from the elementary stream configurator into RTP packets. Terrestrial DMB Content Conversion Gateway. The method of claim 1, The SDP packet processing means, Comprising the SDP packet by adding the session information to the information included in the FIC Terrestrial DMB Content Conversion Gateway. The method of claim 1, The RTP packet processing means, Comprising an RTP packet having the same size as the terrestrial DMB content and using the terrestrial DMB content type as a payload type. Terrestrial DMB Content Conversion Gateway. In the terrestrial DMB content conversion method, A first step of demultiplexing the terrestrial DMB contents of the ETI frame format into FIC and MSC; A second step of configuring the FIC as an SDP packet and configuring the SDP packet as a TCP / IP packet; A third step of constructing the MSC into an RTP packet and configuring the RTP packet into a UDP / IP packet; And A fourth step of transmitting the TCP / IP packet and the UDP / IP packet to an IP network; Terrestrial DMB content conversion method comprising a. The method of claim 6, The SDP packet is, Session information is added to the information included in the FIC How to convert terrestrial DMB content. The method of claim 6, The third step, Demultiplexing the MSC into DAB audio, DAB data and multimedia streams; A fifth step of externally decoding the multimedia stream; A sixth step of configuring the demultiplexed DAB audio and DAB data streams in the fourth step and the decoded multimedia stream in the fifth step, respectively, as RTP packets; And A seventh step of constructing the RTP packet into a UDP / IP packet; How to convert terrestrial DMB content. The method of claim 8, The sixth step, An eighth step of analyzing the decoded multimedia stream in the fifth step and demultiplexing into a video transport stream and an audio transport stream; A ninth step of constructing the video transport stream and the audio transport stream demultiplexed in the eighth step into a video elementary stream and an audio elementary stream, respectively; And And a tenth step of configuring the demultiplexed DAB audio and DAB data streams in the fourth step and the video elementary and audio elementary streams configured in the ninth step, respectively, as RTP packets. How to convert terrestrial DMB content. The method of claim 6, The RTP packet is, It is the same size as the terrestrial DMB content and is composed of the terrestrial DMB content type as the payload type. How to convert terrestrial DMB content. In the terrestrial DMB service providing system, An encoder for encoding DAB audio, DAB data, and a multimedia source as terrestrial DMB content; An ensemble multiplexer for generating the DAB audio, DAB data, and multimedia sources in an ETI frame format; A gateway for transmitting terrestrial DMB content in the ETI frame format to a Coded Orthogonal Frequency Division Multiplexing (COFDM) encoder to access a terrestrial DMB dedicated network, or converting the terrestrial DMB content in the ETI frame format into an IP format to access an IP network; And It includes the COFDM encoder for modulating the ETI frame transmitted from the terrestrial DMB content conversion gateway to the terrestrial DMB dedicated network by modulating the ETI frame by the COFDM method, Here, the gateway separates the terrestrial DMB contents of the ETI frame format into FIC and MSC, and converts the FIC into an IP format packet by SDP and TCP / IP protocols, and the MSC is IP by RTP and UDP / IP protocols. To a formatted packet Terrestrial DMB service provision system.

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