KR100803396B1 - Mdu brodacasting signal distribution system with common set-top box - Google Patents

Abstract

An MDU broadcasting signal distribution system receivable with a common set-top box is provided to connect the set-top box to IP network through a broadcasting signal converting unit, thereby distributing a broadcasting signal to each home more efficiently and viewing a desired broadcast in the each home. An MDU(Multi-Dwelling Unit) broadcasting signal distribution system comprises a broadcasting signal receiving unit(100), an MDU module(200), a switching unit(300), a broadcasting signal converting unit(400), and a set-top box(500). The broadcasting signal receiving unit receives a broadcasting signal. The MDU module divides multichannel signals loaded on the broadcasting signal into each broadcasting signal by channel, packetizes the broadcasting signal by channel, generates an IP(Internet Protocol) mapping table, packetizes the IP mapping table, and transmits the IP mapping table with the packetized broadcasting signal in a multicast mode. The switching unit receives a packet signal from the MDU module to divide into at least one signal and transmit the signal. The broadcasting signal converting unit receives and stores the IP mapping table through the switching unit, acquires an IP address, accesses the IP address to receive the packet signal, extracts the broadcasting signal, and modulates and transmits the broadcasting waves of a broadcasting frequency band. The set-top box receives the signal of the broadcasting frequency band through an internal tuner, multiplexes and decodes the signal to extracts broadcasting AV(Audio/Video) data, and converts the signal into an AV signal, and outputs the AV signal to the outside.

Description

MDB Brodacasting signal distribution system with common set-top box

1 is an overall block diagram of an MDU broadcast signal distribution system according to a preferred embodiment of the present invention;

2 is a block diagram showing an internal configuration of an MDU module according to an embodiment of the present invention;

3 is a block diagram showing an internal configuration of a broadcast signal conversion apparatus according to a preferred embodiment of the present invention;

Figure 4 is a block diagram showing the internal configuration of a set-top box according to an embodiment of the present invention,

5 is a flowchart illustrating an operation process between an MDU module and an L3 switch in detail according to an embodiment of the present invention;

6 is a flowchart illustrating an operation process between an L3 switch and a broadcast signal conversion apparatus in detail according to an embodiment of the present invention;

7 is a diagram illustrating a UDP data structure carrying MPEG-2 TS according to a preferred embodiment of the present invention.

The present invention relates to an MDU broadcast signal distribution system that can be received by a general set-top box, and particularly, receives a broadcast signal through a single broadcast receiving antenna in a multi-family residential or building with an IP network and receives the broadcast signal through an IP network. The present invention relates to a broadcast signal distribution system that receives a broadcast signal through a broadcast signal conversion device by connecting a broadcast signal conversion device to a set top box, and then delivers the broadcast signal to the set top box.

Multi-Dwelling Unit (MDU) is an Internet line connection device of a large residential area, and means a device that enables access to the Internet by using an existing telephone line installed in a multi-family house or building or using an IP network.

With the development of apartments and houses with internet environment, each household can use the internet simply by connecting a computer to the line already installed in each household in the multi-family dwelling, without having to install an internet line.

As such, the Internet can be used by using an IP network in a multi-family house, but in order to receive satellite, terrestrial, and cable broadcasts, a broadcast receiving antenna must be installed separately from the IP network or a coaxial cable line is required.

Recently, a set top box capable of receiving a broadcast signal through an IP network has been developed. However, in addition to receiving broadcasts by connecting a set-top box to the Internet line installed in each home individually, broadcasting is more efficient in order to watch satellite, terrestrial, and cable broadcasts in each household through IP networks installed in multi-family dwellings. There has been a need for a broadcast signal distribution system capable of receiving, distributing and managing signals.

In addition, set-top boxes that receive broadcast frequency signals through a tuner are more widely used than IP set-top boxes that can receive broadcast signals through an IP network. There is a need for a technology capable of receiving a broadcast provided through a network.

An object of the present invention is to receive a broadcast signal through a single antenna, to distribute the broadcast signal to each set-top box installed in a multi-family house or building with an IP network more effectively, using a general frequency signal receiving set-top box The present invention provides a broadcast signal distribution system capable of receiving broadcast signals provided through an IP network.

The MDU broadcast signal distribution system that can be received by a general set top box according to the first embodiment of the present invention includes a broadcast signal receiver for receiving a broadcast signal; The multi-channel signal included in the broadcast signal is separated into a broadcast signal for each channel, the broadcast signal for each channel is packetized by applying a UDP communication protocol, and an IP address is allocated to each channel signal of the broadcast signal by IP mapping. An MDU module for generating a table and packetizing the IP mapping table and transmitting the packetized broadcast signal together with the packetized broadcast signal; A switch unit which receives the packet signal from the MDU module and distributes the packet signal into one or more signals; Receives and stores an IP mapping table through the switch unit, and when a broadcast channel is selected by an external operation, obtains an IP address corresponding to the broadcast channel by referring to the IP mapping table, and assigns an IP address corresponding to the broadcast channel. A broadcast signal conversion device which receives a packet signal to extract a broadcast signal, modulates the broadcast signal, and modulates the broadcast signal in a broadcast frequency band; And a set-top box which receives a signal of a broadcast frequency band from the broadcast signal converting device through an internal tuner, demultiplexes / decodes, extracts broadcast A / V data, converts the A / V signal into an A / V signal, and externally outputs the signal. .

The broadcast signal conversion apparatus may further include an MPEG signal output unit configured to externally output the extracted broadcast signal in the form of an MPEG-encoded broadcast signal, and the set-top box may include an MPEG encoding. It characterized in that it further comprises an MPEG port for receiving the broadcast signal from the outside to provide a video decoder and an audio decoder.

In addition, the broadcast signal conversion apparatus in the MDU broadcast signal distribution system of the present invention, the Ethernet port for receiving a packet signal from the switch unit; Extracts an IP mapping table from the packet signal, and if a broadcast channel is selected by an external input, refers to the IP mapping table and accesses an IP address assigned to the broadcast channel to receive a packet signal containing a broadcast signal. A mapping table recognition unit; A central processing unit which extracts a broadcast signal from the packet signal and converts the broadcast signal into an MPEG processable signal; A broadcast wave generation unit configured to generate a broadcast wave by loading the converted broadcast signal on a carrier frequency of a broadcast frequency band; And a broadcast wave output unit for transmitting the broadcast wave to the outside; And an MPEG signal output unit configured to externally output a broadcast signal converted into an MPEG processable signal by the central processing unit.

According to a second aspect of the present invention, there is provided an MDU broadcast signal distribution system that can be received by a general set top box, including: a broadcast signal receiver configured to receive a broadcast signal; The multi-channel signal included in the broadcast signal is separated into a broadcast signal for each channel, the broadcast signal for each channel is packetized by applying a UDP communication protocol, and an IP address is allocated to each channel signal of the broadcast signal by IP mapping. An MDU module for generating a table and packetizing the IP mapping table and transmitting the packetized broadcast signal together with the packetized broadcast signal; A switch unit which receives the packet signal from the MDU module and distributes the packet signal into one or more signals; Receives and stores an IP mapping table through the switch unit, and when a broadcast channel is selected by an external operation, obtains an IP address corresponding to the broadcast channel by referring to the IP mapping table, and assigns an IP address corresponding to the broadcast channel. A broadcast signal converting apparatus for accessing and receiving a packet signal to extract and output an MPEG encoded broadcast signal to an external device; And a set-top box that receives an MPEG-encoded broadcast signal from the broadcast signal conversion device through a built-in MPEG port, decodes the broadcast A / V data, converts the A / V signal, and outputs the converted A / V signal.

In addition, the broadcast signal conversion apparatus in the MDU broadcast signal distribution system of the present invention, the Ethernet port for receiving a packet signal from the switch unit; Extracting an IP mapping table from the packet signal, and when a broadcast channel is selected by an external input, refers to the IP mapping table and accesses an IP address assigned to the broadcast channel to receive a packet signal containing a broadcast signal. Recognition unit; A central processing unit which extracts a broadcast signal from the packet signal and converts the broadcast signal into an MPEG processable signal; And an MPEG signal output unit configured to externally output a broadcast signal converted into an MPEG processable signal by the central processing unit.

In addition, in the MDU broadcast signal distribution system of the present invention, the MDU module includes: a plurality of distribution modules for receiving and inputting the broadcast signal; TS-to-IP including a demultiplexer for extracting MPTS from the broadcast signal input through the distribution module and demultiplexing the SPTS into a SPTS, and a protocol processing unit for generating a packet signal by applying a UDP communication protocol to the demultiplexed broadcast signal. Processing module; A control module for controlling to externally output the packet signal generated from the TS-to-IP processing module in a multicast manner; And a switch module connected to the switch unit via an IP network to transmit the packet signal to the switch unit.

In addition, in the MDU broadcast signal distribution system of the present invention, the switch unit is directly connected with the MDU module to receive a packet signal from the MDU module, and set the set-top box to which the IGMP customer registration signal is transmitted as a destination. One or more L3 switches for distributing and dispensing; And at least one L2 switch connected to the L3 switch and at least one set-top box via an IP network and receiving the packet signal distributed from the L3 switch and transmitting the packet signal to the set-top box set as a destination.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an overall block diagram of an MDU broadcast signal distribution system according to a preferred embodiment of the present invention.

As shown, the MDU broadcast signal distribution system is largely composed of a broadcast signal receiver 100, the MDU module 200, the switch 300, the broadcast signal conversion device 400, the set-top box 500.

■ The broadcast signal receiving unit 100 is a device for receiving a broadcast signal transmitted from the outside is a dish-type antenna for receiving a satellite signal, and the like. In this case, the broadcast signal receiver may receive satellite broadcast signals such as DVB-S and DVB-S2, terrestrial wave, and cable broadcast signals.

The MDU module 200 receives a broadcast signal from the broadcast signal receiver 100 and separates a multi-channel signal carried in the broadcast signal into a broadcast signal for each channel. In addition, the MDU module 200 allocates an IP address for each broadcast signal separated for each channel, and generates an IP mapping table so that information about the broadcast signal for each channel and the IP address accordingly can be known.

Then, packetization is performed by applying the UDP protocol to the broadcast signal for each channel. In addition, since the broadcast channel must be selected by referring to the IP mapping table in the set-top box receiving the broadcast, the generated IP mapping table must be transmitted to the set-top box. To do this, the generated IP mapping table is packetized.

Finally, the packetized broadcast signal generated previously and the packetized IP mapping table are transmitted to the outside together, and the packet signal is transmitted in a multicast manner so that only set-top boxes belonging to a specific group subscribed to the service can be received.

The switch unit 300 receives the packet signal from the MDU module 200 and distributes the packet signal into one or more signals, and is divided into an L3 switch 310 and an L2 switch 320.

The L3 switch 310 is directly connected to the MDU module 200 and receives the packet signal from the MDU module 200 to distribute the packet signal to the LDU switch 320. In addition, the L2 switch 320 is directly connected to the set-top box and the Ethernet network receives the packet signal from the L3 switch 310 and transmits it to the broadcast signal conversion device 400.

At this time, when the L3 switch 310 receives the IGMP customer registration signal provided from the broadcast signal conversion device 400 through the L2 switch 320, the broadcast signal conversion device 400 is set by setting the broadcast signal conversion device 400 as a destination. ) Transmits the corresponding packet signal to the L2 switch 320 connected thereto.

In this case, the Internet Group Management Protocol (IGMP) is a communication protocol for realizing IP multicast so that a router that receives a multicast packet transmits the packet to a LAN segment to which the PC is connected only when there is a PC that has declared reception with IGMP. It is. That is, the L3 switch 310 serving as a router transmits a packet signal only to the broadcast signal conversion device 400 that has sent the IGMP customer registration signal.

When the L3 switch 310 transmits a packet signal in a multicast manner, since the multicast IP is fixedly used, there is no additional load other than exchanging an IGMP control signal with a broadcast signal conversion apparatus. Therefore, compared with the case of using the Real-Time Streaming Protocol (RTSP) method, the load is not large.

■ The broadcast signal conversion apparatus 400 receives and stores an IP mapping table through the switch unit 300, and when a broadcast channel is selected by an external operation such as a remote controller, the IP signal corresponding to the broadcast channel is referred to. Acquire. Then, by accessing the IP address corresponding to the broadcast channel to receive a packet signal to extract the broadcast signal of the MPEG encoded form.

Thereafter, the extracted broadcast signal should be provided to the set top box 500. The present invention provides two embodiments in order to provide a broadcast signal to the set top box 500 that is not directly connected to the IP network.

According to a first embodiment, a broadcast signal received / extracted through an IP network is converted into a signal of a broadcast frequency band receivable through a tuner in a general set top box 500 and provided. In order to realize this, the broadcast signal conversion apparatus 400 modulates the extracted broadcast signal into a broadcast wave of a broadcast frequency band and then transmits the broadcast signal to the set-top box 500.

According to the second embodiment, the broadcast signal conversion apparatus 400 externally outputs a broadcast signal received / extracted through an IP network in the form of an MPEG-encoded broadcast signal, and the set-top box 500 includes a separate MPEG port. As a result, the MPEG-encoded broadcast signal is received from the broadcast signal conversion apparatus 400 and transferred directly to the video decoder and the audio decoder in the set-top box 500 to reproduce the A / V signal.

As described above, the set-top box 500 receives a broadcast signal from a broadcast signal conversion apparatus through an internally mounted tuner or receives an MPEG encoded broadcast signal through an MPEG port.

Then, this is demultiplexed / decoded or immediately decoded to extract broadcast A / V data, convert it to an A / V signal, and output it externally for viewing by a user.

2 is a block diagram showing an internal configuration of an MDU module according to an embodiment of the present invention.

As shown, the MDU module 200 is largely composed of a distribution module 210, an IP processing module 220, a control module 230, and a switch module 240.

The distribution module 210 distributes and receives a plurality of broadcast signals received through the broadcast signal receiver 100. In particular, in the case of satellite broadcasting, broadcast signals are classified and transmitted by transponders. In order to process the signals transmitted from each transponder, a distribution module 210 corresponding to each transponder is provided to separate and process the signals. Done.

■ TS-to-IP processing module 220 is connected to each distribution module 210 receives a broadcast signal from the distribution module 210, extracts the MPTS from the broadcast signal input through the distribution module 210 A demultiplexer 221 for demultiplexing with SPTS, an IP mapping table generator 222 for generating an IP mapping table by assigning an IP address to each channel of the demultiplexed broadcast signal, and a broadcast signal for each demultiplexed channel and A protocol processor 223 generates a packet signal by applying a UDP communication protocol to an IP mapping table signal.

Looking at the role of each component of the TS-to-IP processing module 220 in more detail as follows.

The demultiplexer 221 receives a broadcast signal from the broadcast signal receiver 100 and receives a multi program transport stream (MPTS) included in the broadcast signal into a single program transport stream (SPTS). Demultiplex with That is, the broadcast signal includes several programs together, and performs a function of separating them into respective single program signals.

The IP mapping table generator 222 generates an IP mapping table by assigning an IP address to each channel signal of the broadcast signal. In the conventional analog channel selection, the broadcasting channel can be distinguished by specifying the frequency of the broadcasting channel.However, in order to provide a broadcasting signal through the IP network, different IP channels are allocated to different broadcasting channels and referred to the broadcasting channels. Create an IP mapping table for this purpose.

The protocol processor 223 packetizes the demultiplexed broadcast signal by applying a UDP communication protocol. UDP stands for User Datagram Protocol, and is a communication protocol that unilaterally transmits data on the Internet without going through a signaling procedure of receiving or receiving information. Although it is less stable than Transmission Control Protocol (TCP), it is much faster. Therefore, it is more effective to apply UDP communication protocol to provide a streaming broadcast signal.

■ The control module 230 controls to externally output the packet signal generated from the TS-to-IP processing module 220 in a multicast manner. That is, the packetized broadcast signal and the IP mapping table generated previously are transmitted together to the outside, and the packet signal is transmitted in a multicast manner so that only the broadcast signal conversion apparatus 400 belonging to the specific group subscribed to the service can be received.

■ The switch module 240 is connected to the switch unit 300 and the IP network, and transmits the packet signal generated by the TS-to-IP module 220 to the switch unit 300.

3 is a block diagram showing an internal configuration of a broadcast signal conversion apparatus according to a preferred embodiment of the present invention. At this time, Figure 3 (a) shows the internal configuration of the broadcast signal conversion apparatus according to the first embodiment of the present invention, Figure 3 (b) shows the internal configuration of the broadcast signal conversion apparatus according to the second embodiment of the present invention Indicates.

As shown in FIG. 3 (a), according to the first embodiment of the present invention, the broadcast signal conversion apparatus 400 is largely composed of an Ethernet port 410, an IP mapping table recognition unit 420, and a central processing unit 430. ), A broadcast wave generator 440, and a broadcast wave output unit 450.

■ Ethernet port 410 receives the packet signal from the switch unit 300 via the Ethernet network.

The IP mapping table recognition unit 420 extracts and stores the IP mapping table from the packet signal received through the Ethernet port 410. When a broadcast channel selection is input by an external operation of a user such as a remote controller, the controller accesses an IP address corresponding to the selected broadcast channel with reference to a stored IP mapping table and receives a packet signal containing a broadcast signal.

The central processing unit 430 extracts the broadcast signal from the packet signal and converts the broadcast signal into an MPEG-processable signal. That is, since the packet signal received through the Ethernet network is divided into packets and mixed with several signals, the MPEG signal is decoded to recover the signal before packetization so that the broadcast can be viewed.

The broadcast wave generator 440 generates a broadcast wave by loading the broadcast signal converted by the central processor 430 into a carrier frequency of a broadcast frequency band. That is, the general set-top box 500 receives satellite, terrestrial, and cable broadcast signals through a tuner, so that the MPEG-decoded broadcast signal received through an IP network is converted into a broadcast wave recognizable by the set-top box 500 and output. do.

■ The broadcast wave output unit 450 transmits the broadcast wave generated by the broadcast wave generator 440 to the set top box 500.

As shown in FIG. 3 (b), according to the second embodiment of the present invention, the broadcast signal conversion apparatus 400 is largely configured as an Ethernet port 410, an IP mapping table recognition unit 420, and a central processing unit 430. The MPEG signal output unit 460 is configured.

■ The MPEG signal output unit 460 is a device that is capable of externally outputting an MPEG signal without converting the broadcast signal, which is received through an IP network and converted into an MPEG processable signal, into a broadcast wave. That is, if the set-top box 500 is provided with a port for directly receiving an MPEG signal, the signal signal output unit 46 and the MPEG port of the set-top box 500 are directly connected to the broadcast signal from the set-top box 500. This makes it easier to receive.

Figure 4 is a block diagram showing the internal configuration of a set top box according to a preferred embodiment of the present invention.

As shown, the tuner 510, the demultiplexer 520, the decoder 530, and the A / V output unit 540 are largely configured, and may further include an MPEG port 550.

■ The tuner 510 directly receives a broadcast signal from the outside. That is, in the present invention, a broadcast signal converted into a broadcast wave is received from the broadcast signal conversion device 400.

Demultiplexer 520 receives a signal from tuner 510 and demultiplexes it. In this case, the signal received by the demultiplexer 520 may be, for example, a signal recovered in the form of MPEG2-TS.

The decoder 530 MPEG-decodes the demultiplexed broadcast signal through the demultiplexer 520 to obtain a pure broadcast signal.

■ The A / V output unit 540 modulates the decoded A / V broadcast signal into an A / V signal that can be recognized by a human, and outputs it to the outside, so that the set top box user can watch the broadcast of the selected channel.

■ MPEG port 550 is connected to the decoder 530, if receiving an mpeg processing broadcast signal from the outside by providing it to the decoder 530, a part of the processed broadcast signal directly from the outside without going through the tuner 510 It provides a way to receive and process.

5 is a flowchart illustrating an operation process between an MDU module and an L3 switch in detail according to a preferred embodiment of the present invention.

As shown, the MDU module 200 receives a broadcast signal such as DVB-S or DVB-S2.

In addition, the MPTS carried in the broadcast signal is demultiplexed into SPTS to classify the signal for each program.

Next, the MPEG-TS signal extracted by demultiplexing is encapsulated in accordance with the UDP protocol, and converted into a packet signal, ready for transmission to the outside.

Finally, the operation process between the MDU module 200 and the L3 switch 310 is completed by externally transmitting the packetized signal according to the UDP protocol. In this case, 1000BASE-FX is used as the interface sent out from the MDU module.

6 is a flowchart illustrating an operation process between an L3 switch and a broadcast signal conversion apparatus in detail according to a preferred embodiment of the present invention.

As shown in the drawing, when the L3 switch 310 receives the IGMP customer registration signal from the broadcast signal conversion device 400, the environment for transmitting the packet signal only to the broadcast signal conversion device 400 registered by the IGMP protocol is provided. To be prepared.

In addition, the L3 switch 310 transmits IP mapping data to the broadcast signal conversion device 400 so that the broadcast signal conversion device 400 can select a broadcast channel.

Thereafter, the L3 switch 310 transmits a packet signal including broadcast data and broadcast related information to the broadcast signal conversion device 400, thereby completing the operation process between the L3 switch 310 and the broadcast signal conversion device 400. do.

7 is a diagram illustrating a UDP data structure carrying MPEG-2 TS according to a preferred embodiment of the present invention.

As shown, the MPEG-2 TS signal has a size of 188 bytes per packet, and a total of seven MPEG-2 TS packets are loaded in the payload region of one UDP packet.

As such, the MDU module 200 bundles seven broadcast signals in units of MPEG packets and transmits the broadcast signals to the set-top box 500 via the broadcast signal conversion apparatus 400 through the IP network.

Although the present invention has been described in more detail with reference to examples, the present invention is not necessarily limited to these examples, and various modifications can be made without departing from the spirit of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

According to the present invention, when an IP network is installed in a multi-family house or building, a broadcast signal conversion device is installed in the IP network without installing a dish antenna or a cable to receive satellite, terrestrial, and cable broadcasting in each home. By connecting set-top boxes, broadcasting signals can be more efficiently distributed to each home, and each home can watch desired broadcasts.

In addition, by applying the IGMP communication protocol there is an effect that can selectively provide a broadcast to the set-top box subscribed to a specific group.

Claims (7)

A broadcast signal receiver for receiving a broadcast signal; The multi-channel signal included in the broadcast signal is separated into a broadcast signal for each channel, the broadcast signal for each channel is packetized by applying a UDP communication protocol, and an IP address is allocated to each channel signal of the broadcast signal by IP mapping. An MDU module for generating a table and packetizing the IP mapping table and transmitting the packetized broadcast signal together with the packetized broadcast signal; A switch unit which receives the packet signal from the MDU module and distributes the packet signal into one or more signals; Receives and stores an IP mapping table through the switch unit, and when a broadcast channel is selected by an external operation, obtains an IP address corresponding to the broadcast channel by referring to the IP mapping table, and assigns an IP address corresponding to the broadcast channel. A broadcast signal conversion device which receives a packet signal to extract a broadcast signal, modulates the broadcast signal, and modulates the broadcast signal in a broadcast frequency band; And A set-top box which receives a signal of a broadcast frequency band from the broadcast signal conversion device through an internal tuner, demultiplexes / decodes the broadcast A / V data, and converts the A / V signal into an external output; MDU broadcast signal distribution system configured to include. The method of claim 1, The broadcast signal conversion device, And an MPEG signal output unit configured to externally output the extracted broadcast signal in the form of an MPEG encoded broadcast signal. The set top box, And an MPEG port for receiving an MPEG-encoded broadcast signal from an external device and providing the MPEG-encoded broadcast signal to a video decoder and an audio decoder. The method of claim 2, The broadcast signal conversion device, An Ethernet port for receiving a packet signal from the switch unit; Extracting an IP mapping table from the packet signal, and when a broadcast channel is selected by an external input, refers to the IP mapping table and accesses an IP address assigned to the broadcast channel to receive a packet signal containing a broadcast signal. Recognition unit; A central processing unit which extracts a broadcast signal from the packet signal and converts the broadcast signal into an MPEG processable signal; A broadcast wave generator configured to generate a broadcast wave by loading the converted broadcast signal on a carrier frequency of a broadcast frequency band; And A broadcast wave output unit configured to transmit the broadcast wave to the outside; And An MPEG signal output unit configured to externally output a broadcast signal converted into an MPEG processable signal by the central processing unit; MDU broadcast signal distribution system characterized in that it comprises a. A broadcast signal receiver for receiving a broadcast signal; The multi-channel signal included in the broadcast signal is separated into a broadcast signal for each channel, the broadcast signal for each channel is packetized by applying a UDP communication protocol, and an IP address is allocated to each channel signal of the broadcast signal by IP mapping. An MDU module for generating a table and packetizing the IP mapping table and transmitting the packetized broadcast signal together with the packetized broadcast signal; A switch unit which receives the packet signal from the MDU module and distributes the packet signal into one or more signals; Receives and stores an IP mapping table through the switch unit, and when a broadcast channel is selected by an external operation, obtains an IP address corresponding to the broadcast channel by referring to the IP mapping table, and assigns an IP address corresponding to the broadcast channel. A broadcast signal converting apparatus for accessing and receiving a packet signal to extract and output an MPEG encoded broadcast signal to an external device; And A set-top box that receives an MPEG-encoded broadcast signal from the broadcast signal conversion device through a built-in MPEG port, decodes the broadcast A / V data, converts the A / V signal into an A / V signal, and outputs the external signal; MDU broadcast signal distribution system configured to include. The method of claim 4, wherein The broadcast signal conversion device, An Ethernet port for receiving a packet signal from the switch unit; Extracting an IP mapping table from the packet signal, and when a broadcast channel is selected by an external input, refers to the IP mapping table and accesses an IP address assigned to the broadcast channel to receive a packet signal containing a broadcast signal. Recognition unit; A central processing unit which extracts a broadcast signal from the packet signal and converts the broadcast signal into an MPEG processable signal; And An MPEG signal output unit configured to externally output a broadcast signal converted into an MPEG processable signal by the central processing unit; MDU broadcast signal distribution system characterized in that it comprises a. The method according to any one of claims 1 to 5, The MDU module, A plurality of distribution modules configured to receive the broadcast signals by inputting them; A demultiplexer for extracting MPTS from the broadcast signal input through the distribution module and demultiplexing the SPTS into an SPTS, and an IP mapping table generator for generating an IP mapping table by assigning an IP address to each channel of the demultiplexed broadcast signal; A TS-to-IP processing module including a protocol processor configured to generate a packet signal by applying a UDP communication protocol to the demultiplexed broadcast signal for each channel and the IP mapping table; A control module for controlling to externally output the packet signal generated from the TS-to-IP processing module in a multicast manner; And A switch module connected to the switch unit via an IP network and transmitting the packet signal to the switch unit; MDU broadcast signal distribution system characterized in that it comprises a. The method of claim 6, The switch unit, At least one L3 switch connected directly to the MDU module to receive a packet signal from the MDU module, to set a set-top box that transmits an IGMP customer registration signal as a destination, and to distribute and transmit the corresponding packet signal; And At least one L2 switch connected to the L3 switch and at least one set-top box via an IP network and receiving the packet signal distributed from the L3 switch and transmitting the packet signal to the set-top box set as a destination; MDU broadcast signal distribution system characterized in that it comprises a.

Images