KR100880046B1 - Apparatus and method of relaying digital multimedia broadcasting for emergency broadcasting service - Google Patents

Abstract

An apparatus and a method of relaying a digital multimedia broadcast for an emergency broadcasting service are provided to convert a currently broadcast digital multimedia broadcasting signal to an emergency signal, and transmit the emergency signal, thereby easily providing the emergency broadcasting service to a specific area. A broadcasting relay apparatus(100) comprises a broadcasting receiving unit(110), an emergency signal generating unit(130), a signal switching unit(120) and a broadcasting transmitting unit(140). The emergency signal generating unit encodes, multiplexes and modulates an emergency broadcasting message inputted from a user to be suitable for channel information of a broadcasting signal. The emergency signal generating unit generates an emergency signal. The signal switching unit switches a signal to be connected to one of the broadcasting receiving unit and the emergency signal generating unit. The broadcasting transmitting unit transmits a broadcasting signal or an emergency signal outputted from the signal switching unit.

Description

Broadcasting relay apparatus and method for emergency broadcasting service {APPARATUS AND METHOD OF RELAYING DIGITAL MULTIMEDIA BROADCASTING FOR EMERGENCY BROADCASTING SERVICE}

The present invention relates to a broadcast relay device and method for an emergency broadcast service. More particularly, a digital multimedia broadcast signal transmitted from an external device is relayed and is currently relayed according to an emergency broadcast service request from a user. By converting the multimedia broadcasting signal into an emergency signal and transmitting an emergency signal, it is possible to easily provide an emergency broadcasting service to a specific region (for example, a tunnel, a subway, etc.) The present invention relates to a broadcast relay apparatus and method for emergency broadcast service, which can be utilized as a local medium.

The present invention is derived from a study conducted as part of the IT growth engine core technology development project of the Ministry of Information and Communication and the Ministry of Information and Communication Research and Development. Channel RF Relay Technology Development].

Terrestrial Digital Multimedia Broadcasting (DMB) has been commercialized by adding multimedia broadcasting services including video services to the European Eureka 147-based Digital Audio Broadcasting (DAB) system.

Recently, in order to improve the quality of a broadcast signal since the terrestrial digital multimedia broadcasting service has been commercialized, a method of installing a terrestrial digital multimedia broadcasting relay device in a crowded area such as a building or a mountain has been discussed. This is to improve the reception state of terrestrial digital multimedia broadcasting by installing a terrestrial digital multimedia broadcasting relay device in a region where broadcast reception rate is low, such as a sound region.

In particular, such a digital multimedia broadcasting relay device should be installed not only in the above-described shaded areas but also in tunnels and subways in order to increase the broadcast reception rate. In the future, such a relay device is installed in a tunnel or subway where broadcast reception is not properly performed, and it will be possible to easily watch digital multimedia broadcasting anywhere in shadow areas such as buildings or mountains.

Conventional terrestrial digital multimedia broadcasting relay devices focus on the relay function of terrestrial digital multimedia broadcasting signals. Such relay devices do not have a function to respond to an emergency situation. However, the relay device performs a relay function of a broadcast signal for a specific region.

Meanwhile, in the conventional digital multimedia broadcasting, the same broadcasting service is not provided to a specific region but not to a specific region. In addition, in the conventional digital multimedia broadcasting, it is possible to provide only emergency broadcasting or disaster broadcasting services for the entire region instead of the specific region. When an emergency occurs in a specific area, there is a problem that it is difficult to provide an emergency broadcast service only to a corresponding area by using digital multimedia broadcasting.

Therefore, the prior art as described above has a problem that it is difficult to provide an emergency broadcasting service using digital multimedia broadcasting only in a specific region, and to solve such a problem is an object of the present invention.

Therefore, the present invention relays the digital multimedia broadcasting signal transmitted from the outside, and converts the digital multimedia broadcasting signal currently being relayed according to the emergency broadcasting service request from the user into an emergency signal and transmits an emergency signal, thereby providing a specific area. A broadcast relay device for emergency broadcasting services, which can easily provide emergency broadcasting services (for example, tunnels, subways, etc.) and further utilize digital multimedia broadcasting as a local media for disaster broadcasting. The purpose is to provide a method.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned above can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily 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 solve the above problems, the present invention relays a digital multimedia broadcasting signal transmitted from the outside, and then switches the digital multimedia broadcasting signal currently being relayed in response to an emergency broadcasting service request from a user into an emergency signal. Characterized in that the transmission.

More specifically, the present invention provides a broadcast receiving means for receiving and processing broadcast signals from the outside; Emergency signal generating means for generating an emergency signal by encoding, multiplexing, and modulating an emergency broadcast message input from a user according to channel information of a broadcast signal; A signal switching means for performing signal switching so as to be connected to either the broadcast receiving means or the emergency signal generating means, and switching the signal to the emergency signal generating means as an emergency signal is generated by the emergency signal generating means; And broadcast transmission means for transmitting the broadcast signal or the emergency signal output from the signal switching means.

On the other hand, the present invention, the broadcast receiving step of receiving a broadcast signal from the outside; A broadcast transmission step of transmitting the received processed broadcast signal; Generating an emergency signal by encoding, multiplexing, and modulating an emergency broadcast message input from a user according to channel information of a broadcast signal; A signal switching step of switching the received broadcast signal into the generated emergency signal as the emergency signal is generated; And an emergency signal transmitting step of transmitting the signal switched emergency signal.

The present invention as described above, by relaying the digital multimedia broadcasting signal transmitted from the outside, by switching the digital multimedia broadcasting signal currently being relayed in response to the emergency broadcast service request from the user to the emergency signal by transmitting an emergency signal In addition, there is an effect that can easily provide an emergency broadcast service to a specific region (for example, tunnel, subway, etc.).

In addition, the present invention provides an emergency broadcasting service to digital multimedia broadcasting users who are in an emergency situation in a specific area, thereby quickly avoiding an emergency situation, and furthermore, a specific area for disaster broadcasting of digital multimedia broadcasting. It is effective to use as a medium of the.

The above objects, features, and advantages will become more apparent from the detailed description given hereinafter with reference to the accompanying drawings, and accordingly, those skilled in the art to which the present invention pertains may share the technical idea of the present invention. It will be easy to implement. 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.

The present invention is characterized in that the digital multimedia broadcasting signal transmitted from the outside is relayed, and the emergency signal is transmitted by converting the digital multimedia broadcasting signal currently being relayed into an emergency signal according to the emergency broadcasting service request from the user. . In this case, the present invention may use signal switching in the intermediate frequency band as shown in FIG. 1 or signal switching in the radio frequency band as shown in FIG. 2.

Hereinafter, an embodiment of a broadcast relay device for providing an emergency broadcast service using a signal switching in an intermediate frequency band and a broadcast relay device for providing an emergency broadcast service using a signal switching in an intermediate frequency band according to an embodiment of the present invention. Let's look at the different.

1 is a block diagram of an embodiment of a broadcast relay device for an emergency broadcast service according to the present invention.

As shown in FIG. 1, the broadcast relay apparatus 100 for an emergency broadcast service according to the present invention includes a broadcast receiver 110, a signal switcher 120, an emergency signal generator 130, and a broadcast transmitter 140. It includes. Here, the broadcast receiver 110 includes a terrestrial DMB RF receiver 111 and a frequency downlink (frequency down converter) 112. In addition, the broadcast transmitter 140 includes a frequency uplink (frequency upconversion) 141 and a terrestrial DMB RF transmitter 142.

Hereinafter, each component of the broadcast relay device 100 according to the present invention will be described in detail.

The broadcast relay device 100 for emergency broadcasting service according to the present invention basically performs a terrestrial digital multimedia broadcasting (DMB) relay function for relaying broadcast signals. In addition, the digital multimedia broadcasting relay device 100 generates an emergency signal in case of an emergency or in response to a request of a user (operator), and converts a digital multimedia broadcasting signal currently being relayed into the generated emergency signal to digital multimedia broadcasting. It transmits an emergency signal instead of a signal.

First, the broadcast receiving unit 110 receives a digital multimedia broadcasting signal of a radio frequency (RF) band transmitted wirelessly, and converts the received digital multimedia broadcasting signal of a radio frequency band to an intermediate frequency (IF) band immediately. Down-convert the digital multimedia broadcast signal. The broadcast receiver 110 transmits the converted intermediate frequency band signal to the signal switcher 120. When the intermediate frequency band signal is not an urgent situation, that is, there is no emergency broadcast requested by the user, the intermediate frequency band signal is up-converted by the broadcast transmitter 140 and transmitted through the broadcast network through the signal switching unit 120. That is, the broadcast relay device 100 for emergency broadcast service according to the present invention performs a function of relaying a terrestrial digital multimedia broadcast signal received from the outside as it is, in an emergency situation.

In more detail, the terrestrial DMB RF receiver 111 receives a terrestrial digital multimedia broadcasting signal of a radio frequency band from the outside. The terrestrial DMB RF receiver 111 has a reception function that conforms to the terrestrial DMB standard and receives a radio frequency band signal.

In addition, the frequency down part 112 frequency downs the terrestrial digital multimedia broadcasting signal of the radio frequency band received by the terrestrial DMB RF receiver 111. That is, the frequency downlink unit 112 down-converts the radio frequency band signal into the intermediate frequency band signal and transmits the signal to the signal switching unit 120.

Subsequently, the signal switching unit 120 passes the broadcast signal output from the broadcast reception unit 110, that is, the intermediate frequency band signal (IF signal), to the broadcast transmission unit 140 as it is not in an emergency situation. That is, the signal switcher 120 performs a function of connecting the signal paths of the broadcast receiver 110 and the broadcast transmitter 140.

Meanwhile, when an emergency situation occurs, the emergency signal generator 130 receives an emergency broadcast message through an input terminal (for example, a microphone or a keyboard) from the user. The emergency signal generator 130 encodes, multiplexes and modulates the input emergency broadcast message according to the channel information of the terrestrial DMB to generate an emergency signal of an intermediate frequency band. Here, the emergency signal generator 130 extracts channel information of the terrestrial DMB by analyzing the received terrestrial digital multimedia broadcasting signal. In addition, the emergency signal generator 130 transmits the generated emergency signal to the signal switcher 120.

The signal switching unit 120 performs a signal switching so as to be connected to any one of the broadcast receiving unit 110 or the emergency signal generating unit 130, and the emergency signal generating unit 130 generates an emergency signal as the emergency signal is generated. The signal is switched to 130. That is, when an emergency signal is detected from the emergency signal generator 130, the signal switcher 120 changes the signal path previously connected to the broadcast receiver 110 to the emergency signal generator 130 to switch the signal. Accordingly, the signal output from the signal switching unit 120 becomes an intermediate frequency band signal generated by the emergency signal generation unit 130 instead of the intermediate frequency band signal (ground wave DMB signal) output from the broadcast receiving unit 110. That is, the signal switcher 120 transmits the emergency signal of the intermediate frequency band to the broadcast transmitter 140 through the signal path connected to the emergency signal generator 130.

On the other hand, if an emergency signal is not detected from the emergency signal generator 130 for a predetermined time, the signal switcher 120 broadcasts the signal path that was connected to the emergency signal generator 130 again for the emergency signal service. To switch the signal.

The broadcast transmitter 140 transmits the broadcast signal output from the signal switcher 120 according to the broadcast standard. Here, the broadcast signal is a terrestrial DMB signal received by the broadcast receiving unit 110 if it is not an emergency situation, and an emergency signal generated by the emergency signal generating unit 130 when an emergency situation occurs.

That is, the relay device 100 according to the present invention normally provides a normal terrestrial DMB service, and when an emergency occurs, the relay device 100 provides an emergency broadcast service without changing a frequency in a currently used channel.

As described above, in the broadcast relay device 100 according to the present invention, since the terrestrial DMB signal and the emergency broadcast service signal are switched between signals in a specific intermediate frequency band, it is necessary to provide an emergency broadcast service in the entire terrestrial DMB frequency band. It becomes easy.

On the other hand, as shown in Figure 2, in order to switch the signal in the radio frequency band, the emergency signal generator 230 generates a radio frequency band signal (RF signal) according to each channel to the signal switching unit 220 To pass.

2 is a configuration diagram of another embodiment of a broadcast relay device for an emergency broadcast service according to the present invention.

The broadcast relay device 200 of FIG. 2 according to the present invention performs signal switching in a radio frequency band, not signal switching for an emergency broadcast service in the intermediate frequency band of FIG. 1. That is, the broadcast relay device 200 of FIG. 2 according to the present invention does not perform the function of down-converting the frequency and up-converting again because other components are the same as those of FIG. That is, the present invention can switch the signal in the radio frequency band as shown in FIG.

As shown in FIG. 2, the broadcast relay device 200 according to another embodiment of the present invention includes a terrestrial DMB RF receiver 210, a signal switcher 220, an emergency signal generator 230, and a terrestrial DMB RF transmitter. 240.

Hereinafter, each component of the broadcast relay device 200 according to another embodiment of the present invention will be described in detail.

The terrestrial DMB RF receiver 210 receives a terrestrial DMB signal in a radio frequency band from the outside.

In addition, the signal switching unit 220 passes the broadcast signal received from the terrestrial DMB RF receiver 210, that is, the radio frequency band signal, to the terrestrial DMB RF transmitter 240 as it is. That is, the signal switching unit 220 performs a function of connecting the signal paths for the terrestrial DMB RF receiver 210 and the terrestrial DMB RF transmitter 240.

The emergency signal generator 230 receives an emergency broadcast message from an user through an input terminal (for example, a microphone or a keyboard) when an emergency situation occurs. In addition, the emergency signal generator 230 encodes, multiplexes and modulates the input emergency broadcast message according to channel information of the terrestrial DMB to generate an emergency signal in a radio frequency band. At this time, the emergency signal generator 230 generates an emergency signal of a radio frequency band according to each channel. The emergency signal generator 230 transmits the generated radio frequency signal to the signal switcher 220.

When an emergency situation occurs, that is, when an emergency signal is detected from the emergency signal generator 230, the signal switcher 220 uses the emergency signal generator 230 to connect a signal path previously connected to the terrestrial DMB RF receiver 210. Change the signal to switch. Accordingly, the signal output from the signal switching unit 220 is not the radio frequency band signal (terrestrial DMB signal) received by the terrestrial DMB RF receiver 210 but the emergency of the radio frequency band generated by the emergency signal generator 230. It becomes a signal. That is, the signal switching unit 220 transmits the emergency signal of the radio frequency band to the terrestrial DMB RF transmitter 240 through a signal path connected to the emergency signal generator 230.

On the other hand, if the emergency signal is not detected from the emergency signal generator 230 for a predetermined time, the signal switching unit 220 re-connects the signal path that was connected with the emergency signal generator 230 for the emergency signal service terrestrial DMB RF receiver Change to 210 to switch the signal.

The terrestrial DMB RF transmitter 240 transmits a broadcast signal output from the signal switcher 220 according to a broadcast standard. Here, the broadcast signal is a terrestrial DMB signal received by the terrestrial DMB RF receiver 210 if not an emergency situation, and is an emergency signal generated by the emergency signal generator 230 when an emergency situation occurs.

3 is a detailed configuration diagram of one embodiment of the emergency signal generator of FIG. 1 according to the present invention.

As shown in FIG. 3, the emergency signal generator 130 of FIG. 1 according to the present invention receives and analyzes an encoder 310, a stream converter 320, an intermediate frequency signal generator 330, and a terrestrial DMB. The unit 340 is included.

The encoder 310 receives an emergency broadcast message from an operator (user). Here, the emergency broadcast message may be input by, for example, a voice through a microphone or a text through a keyboard of a computer. That is, the encoder 310 receives an emergency broadcast message through an input terminal (for example, a microphone, a keyboard, etc.) from the operator. The encoder 310 encodes the emergency broadcast message input by the user according to a broadcast standard corresponding to each terrestrial DMB service. That is, the encoder 310 encodes the emergency broadcast message into at least one service broadcast signal among an audio service signal, a video service signal, and a data service signal corresponding to each terrestrial DMB service.

The stream converter 320 is based on information about a specific channel received from the terrestrial DMB receiving and analyzing unit 340, and includes an audio service signal, a video service signal, and data, which are emergency broadcast messages encoded by the encoder 310. The service signal is converted into an emergency signal for emergency broadcasting service. That is, the stream converter 320 converts each terrestrial DMB service into an emergency broadcast service and reconstructs it. At this time, the terrestrial DMB receiving and analyzing unit 340 extracts information on the current channel with respect to a specific channel of the received terrestrial DMB and transmits it to the stream converter 320.

The intermediate frequency signal generator 330 converts the frequency band of the emergency signal converted by the stream converter 320 into an intermediate frequency band to generate an intermediate frequency band signal (IF signal) for an emergency broadcast service.

Meanwhile, in the terrestrial DMB, various services are provided in one broadcasting channel. That is, in the terrestrial DMB, it is possible to simultaneously provide terrestrial DMB video service, audio service and data service in one channel. Since the present invention provides an emergency broadcast service in an intermediate frequency band, it is necessary to provide an emergency broadcast service for each service in order to provide various services within one frequency even if there is no change in frequency. This is because terrestrial DMB receivers each use their desired service within a specific frequency, thereby providing emergency broadcasting services to all receivers.

4 is a detailed configuration diagram of one embodiment of the emergency signal generator of FIG. 2 according to the present invention.

As shown in FIG. 4, the emergency signal generator 230 of FIG. 2 according to the present invention includes an encoder 410, a stream converter 420, an intermediate frequency signal generator 430, and a radio frequency signal generator. 440 and terrestrial DMB receiving and analyzing unit 450.

First, the encoder 410 encodes an emergency broadcast message received from an operator (user) through an input terminal (eg, a microphone, a keyboard, etc.) according to a broadcast standard corresponding to each terrestrial DMB service.

The stream converter 420 is based on the information on a specific channel of the terrestrial DMB received from the terrestrial DMB receiving and analyzing unit 450, and the audio service signal and video, which are emergency broadcast messages encoded by the encoder 410, are encoded. The service signal and data service signal are converted into an emergency signal for emergency broadcasting service. At this time, the terrestrial DMB receiving and analyzing unit 450 extracts information on the current channel with respect to a specific channel of the received terrestrial DMB and transmits it to the stream converter 420.

The intermediate frequency signal generator 430 converts the frequency band of the emergency signal converted by the stream converter 420 into an intermediate frequency band to generate an emergency signal of the intermediate frequency band.

The radio frequency signal generator 440 converts the emergency signal of the intermediate frequency band generated by the intermediate frequency signal generator 430 into an emergency signal of the radio frequency band to generate an emergency signal (RF signal) of the radio frequency band. .

FIG. 5 is a detailed configuration diagram of an encoding unit of FIGS. 3 and 4 according to the present invention.

As shown in FIG. 5, the encoders 310 and 410 include an audio service encoder 510, a video service encoder 520, and a data service encoder 530.

As described above, the terrestrial DMB service may be classified into an audio service, a video service, and a data broadcasting service. At this time, the standards constituting each service are different. In order to provide the emergency broadcast service to each service, the emergency broadcast message should be encoded by the audio service encoder 510, the video service encoder 520, and the data service encoder 530, respectively.

That is, the audio service encoder 510, the video service encoder 520, and the data service encoder 530 may use the emergency broadcast message received from the operator for the audio service, the video service, and the data service that meet the service standard. Coded as terrestrial DMB signal. The audio service encoder 510, the video service encoder 520, and the data service encoder 530 transmit the encoded terrestrial DMB signals to the stream converters 320 and 420, respectively.

6 is a detailed configuration diagram of an embodiment of the stream conversion unit of FIGS. 3 and 4 according to the present invention.

As shown in FIG. 6, the stream converters 320 and 420 include a high speed information channel analyzer 610, a main service channel multiplexer 620, and a multiplexer 630.

The fast information channel analyzer 610 analyzes a fast information channel (FIC) for the broadcast service configuration transmitted from the terrestrial DMB reception and analyzer 340 and 450, so that the channel information provided from the channel is broadcast. Check the number and type of services and the volume of each service. This channel information is information on the channel configuration such as the number of services and the size of service data provided in the current channel. Channel information is included in, for example, a fast information channel (FIC) in a broadcast standard. The high speed information channel analyzer 610 transmits the confirmation result to the main service channel multiplexer 620. Here, the main service channel (MSC) is an aggregate including a stream for actual broadcast service. That is, the terrestrial DMB service in one channel includes a high speed information channel and a main service channel. In addition, the fast information channel analyzer 610 transmits the fast information channel for the broadcast service configuration to the multiplexer 630.

The main service channel multiplexer 620 provides channel information about the number and type of broadcast services and the amount of transmission of each service identified by the high speed information channel analyzer 610, and the respective services received from the encoders 310 and 410. Multiplex the emergency broadcast stream corresponding to the main service channel.

The multiplexer 630 multiplexes the main service channel newly multiplexed by the main service channel multiplexer 620 and the high speed information channel received from the high speed information channel analyzer 610 to generate one emergency signal (broadcast stream). do. Here, the generated emergency signal (broadcast stream) may be an ensemble transport interface (ETI) frame, which is a transport interface standard, according to a usage method.

7 is a flowchart illustrating a broadcast relay method for emergency broadcasting service according to the present invention.

First, the broadcast receiving unit 110 receives a radio frequency signal for digital multimedia broadcasting transmitted wirelessly, and converts the received radio frequency signal into an intermediate frequency band signal (702).

The emergency signal generator 130 checks whether an emergency situation occurs (704).

As a result of the check 704, the signal switching unit 120 passes the broadcast signal output from the broadcast receiver 110, that is, the broadcast signal of the intermediate frequency band, to the broadcast transmitter 140 as it is. Accordingly, the broadcast transmitter 140 up-converts the broadcast signal of the intermediate frequency band passed through the signal switcher 120 to the radio frequency band and transmits it (712).

On the other hand, if the check result 704, an emergency situation occurs, that is, when the emergency broadcast message is input from the user (operator) through an input terminal (for example, a microphone, a keyboard, etc.), the emergency signal generator 130 In operation 706, the emergency broadcast message is encoded and multiplexed according to the channel information of the terrestrial DMB and modulated to generate an emergency signal of an intermediate frequency band.

Accordingly, when an emergency signal is detected from the emergency signal generator 130, the signal switcher 120 changes the signal path previously connected to the broadcast receiver 110 to the emergency signal generator 130 to switch the signal. (708).

The broadcast transmitter 140 up-converts the emergency signal output from the signal switcher 120 into a radio frequency band and transmits the emergency signal up-converted into a radio frequency band signal according to a broadcast standard (710).

8 is a flowchart illustrating another embodiment of a relay method for emergency broadcasting service according to the present invention.

First, the terrestrial DMB RF receiver 210 receives a terrestrial DMB radio frequency signal (802). In addition, the emergency signal generator 230 checks whether an emergency situation occurs (804).

As a result of the check 804, if it is not an urgent situation, the signal switching unit 220 passes the broadcast signal output from the broadcast receiver 210, that is, the broadcast signal of a radio frequency band, to the broadcast transmitter 240 as it is. Accordingly, the terrestrial DMB RF transmitter 240 directly transmits the broadcast signal of the radio frequency band passed through the signal switcher 220 (812).

On the other hand, the check result 804, if an emergency situation occurs, that is, if an emergency broadcast message is input from the user (operator) through an input terminal (for example, a microphone, a keyboard, etc.), the emergency signal generator 230 In step 806, the emergency broadcast message is encoded and multiplexed on the basis of the channel information of the terrestrial DMB and subjected to a modulation process to generate an emergency signal in a radio frequency band.

Accordingly, when an emergency signal is detected from the emergency signal generator 230, the signal switcher 220 changes the signal path previously connected to the terrestrial DMB RF receiver 210 to the emergency signal generator 230 to signal the signal. Switch (808).

The terrestrial DMB RF transmitter 240 transmits an emergency signal output from the signal switcher 220 according to a broadcast standard (810).

On the other hand, the method of the present invention as described above can be written in a computer program. And the code and code segments constituting the program can be easily inferred by a computer programmer in the art. In addition, the written program is stored in a computer-readable recording medium (information storage medium), and read and executed by a computer to implement the method of the present invention. The recording medium may include any type of computer readable recording medium.

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.

1 is a block diagram of an embodiment of a broadcast relay device for an emergency broadcast service according to the present invention;

2 is a configuration diagram of another embodiment of a broadcast relay device for an emergency broadcast service according to the present invention;

3 is a detailed configuration diagram of an embodiment of the emergency signal generator of FIG. 1 according to the present invention;

4 is a detailed configuration diagram of one embodiment of the emergency signal generator of FIG. 2 according to the present invention;

5 is a detailed structural diagram of an embodiment of an encoder of FIGS. 3 and 4 according to the present invention;

6 is a detailed configuration diagram of an embodiment of the stream conversion unit of FIGS. 3 and 4 according to the present invention;

7 is a flowchart illustrating an embodiment of a broadcast relay method for an emergency broadcast service according to the present invention;

8 is a flowchart illustrating another embodiment of a broadcast relay method for an emergency broadcast service according to the present invention.

* Explanation of symbols for the main parts of the drawings

110: broadcast receiver 111: terrestrial DMB RF receiver

112: frequency down part 120: signal switching part

130: emergency signal generator 140: broadcast transmitter

141: frequency uplink section 142: terrestrial DMB RF transmitter

310: encoder 320: stream converter

330: Intermediate frequency signal generator 510: Audio service encoder

520: video service encoder 530: data service encoder

610: high-speed information channel analysis unit 620: main service channel multiplexing unit

630: multiplexer

Claims (16)

Broadcast receiving means for receiving and processing broadcast signals from the outside; Emergency signal generating means for generating an emergency signal by encoding, multiplexing, and modulating an emergency broadcast message input from a user according to channel information of a broadcast signal; A signal switching means for performing signal switching so as to be connected to either the broadcast receiving means or the emergency signal generating means, and switching the signal to the emergency signal generating means as an emergency signal is generated by the emergency signal generating means; And Broadcast transmission means for transmitting a broadcast signal or an emergency signal output from the signal switching means Broadcast relay device for emergency broadcast service comprising a. The method of claim 1, The broadcast receiving means, Receiving a broadcast signal of a radio frequency (RF) band from the outside and frequency down to a broadcast signal of an intermediate frequency (IF) band, and transmits the frequency downed broadcast signal to the signal switching means, The broadcast transmission means, And a broadcast signal or an emergency signal of an intermediate frequency band outputted from the signal switching means is transmitted upward by a frequency of a radio frequency band broadcast signal. The method of claim 2, The emergency signal generating means, A broadcast relay device for emergency broadcast service, comprising generating an emergency signal of an intermediate frequency band based on FIC information of a broadcast signal. The method of claim 3, wherein The emergency signal generating means, Broadcast receiving and analyzing means for extracting a fast information channel (FIC) by analyzing a broadcast signal received from the outside; Encoding means for encoding an emergency broadcast message according to a digital multimedia broadcasting standard; Stream conversion means for generating an emergency signal for an emergency broadcast message encoded by the encoding means based on the extracted channel information on the fast information channel (FIC); And Intermediate frequency signal generation means for converting the frequency band of the emergency signal generated by the stream conversion means into an intermediate frequency band Broadcast relay device for emergency broadcast service comprising a. The method of claim 1, The broadcast receiving means, Receives a broadcast signal of a radio frequency (RF) band from the outside and delivers it to the signal switching means, The broadcast transmission means, And a broadcast signal or an emergency signal of a radio frequency band output from said signal switching means. The method of claim 5, wherein The emergency signal generating means, A broadcast relay device for emergency broadcast service, characterized in that for generating an emergency signal in a radio frequency band based on the channel information of the fast information channel (FIC) of the broadcast signal. The method of claim 6, The emergency signal generating means, Broadcast receiving and analyzing means for extracting a fast information channel (FIC) by analyzing a broadcast signal received from the outside; Encoding means for encoding an emergency broadcast message according to a digital multimedia broadcasting standard; Stream conversion means for generating an emergency signal for an emergency broadcast message encoded by the encoding means based on the extracted channel information on the fast information channel (FIC); Intermediate frequency signal generation means for converting the frequency band of the emergency signal generated by the stream conversion means into an intermediate frequency band; And Radio frequency signal generating means for converting the emergency signal of the intermediate frequency band generated by the intermediate frequency signal generating means into a radio frequency band Broadcast relay device for emergency broadcast service comprising a. The method according to claim 4 or 7, The encoding means, Broadcasting the emergency broadcast message to at least one of the broadcast signal for audio service, the broadcast signal for video service, the broadcast signal for data service corresponding to the digital multimedia broadcasting standard, the broadcast for the emergency broadcast service, characterized in that Relay device. The method of claim 8, The stream conversion means, Fast information channel analysis means for analyzing the extracted fast information channel (FIC) to obtain channel information; Main service channel multiplexing means for multiplexing the channel information obtained by the fast information channel analyzing means and the emergency broadcast message encoded by the encoding means into a main service channel; And Multiplexing means for multiplexing the main service channel multiplexed by the main service channel multiplexing means and the high speed information channel from the high speed information channel analyzing means to generate an emergency signal which is one broadcast stream Broadcast relay device for emergency broadcast service comprising a. A broadcast receiving step of receiving and processing a broadcast signal from the outside; A broadcast transmission step of transmitting the received processed broadcast signal; Generating an emergency signal by encoding, multiplexing, and modulating an emergency broadcast message input from a user according to channel information of a broadcast signal; A signal switching step of switching the received broadcast signal into the generated emergency signal as the emergency signal is generated; And An emergency signal transmitting step of transmitting the signal switched emergency signal Broadcast relay method for emergency broadcast service comprising a. The method of claim 10, The broadcast receiving step, Receives a broadcast signal in a radio frequency (RF) band from the outside and frequency down-converts to a broadcast signal in an intermediate frequency (IF) band The emergency signal transmission step, And broadcasting the signal-switched emergency signal by up-converting the frequency signal into an emergency signal of a radio frequency band. The method of claim 11, The emergency signal generation step, A broadcast receiving and analyzing step of extracting a fast information channel (FIC) by analyzing a broadcast signal received from the outside; An encoding step of encoding an emergency broadcast message according to a digital multimedia broadcasting standard; A stream conversion step of generating an emergency signal for the encoded emergency broadcast message based on channel information of the extracted fast information channel (FIC); And Intermediate frequency signal generation step of converting the frequency band of the generated emergency signal to an intermediate frequency band Broadcast relay method for emergency broadcast service comprising a. The method of claim 10, The broadcast receiving step, Receives a radio frequency (RF) band broadcast signal from the outside, The emergency signal transmission step, The broadcast relay method for an emergency broadcast service, characterized in that for transmitting an emergency signal of the switched radio frequency band. The method of claim 13, The emergency signal generation step, A broadcast receiving and analyzing step of extracting a fast information channel (FIC) by analyzing a broadcast signal received from the outside; An encoding step of encoding an emergency broadcast message according to a digital multimedia broadcasting standard; A stream conversion step of generating an emergency signal for the encoded emergency broadcast message based on channel information of the extracted fast information channel (FIC); Generating an intermediate frequency signal for converting the frequency band of the generated emergency signal into an intermediate frequency band; And Generating a radio frequency signal for converting the emergency signal of the converted intermediate frequency band into a radio frequency band Broadcast relay method for emergency broadcast service comprising a. The method according to claim 12 or 14, wherein The encoding step, Broadcasting the emergency broadcast message to at least one of the broadcast signal for audio service, the broadcast signal for video service, the broadcast signal for data service corresponding to the digital multimedia broadcasting standard, the broadcast for the emergency broadcast service, characterized in that Relay method. The method of claim 15, The stream conversion step, Analyzing the extracted fast information channel (FIC) to obtain channel information; Multiplexing the obtained channel information and the encoded emergency broadcast message into a main service channel; And Multiplexing the multiplexed main service channel and the high speed information channel to generate an emergency signal which is one broadcast stream; Broadcast relay method for emergency broadcast service comprising a.

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