KR101320544B1 - Method of providing emergency broadcasting for a emergency service signal and apparatus of relaying broadcasting implememting the same - Google Patents

Abstract

A disaster broadcast providing method for providing a disaster service signal is provided. The disaster broadcasting providing method may further include encoding the disaster service signal at a predetermined bit rate, selectively inserting a null stream into the encoded disaster service signal, and then processing a signal to process a first broadcast channel having a bit rate greater than or equal to the bit rate. Generating a first disaster message signal having a primary service bit rate and selectively inserting a null stream into the encoded disaster service signal and processing the signal, thereby causing a second broadcast channel above the bit rate and different from the first main service bit rate; Generating a second disaster message signal having a second main service bit rate of. In addition, a broadcast relay apparatus for providing a disaster service signal is provided.

Disaster Broadcasting, Repeater

Description

Disaster Broadcasting Provision Method for Providing Disaster Service Signal and Broadcasting Relay Device Implementing the Same {METHOD OF PROVIDING EMERGENCY BROAD CASTING

The present invention relates to a disaster broadcast providing method and a broadcast relay apparatus for implementing the same, and more particularly, to a disaster broadcast providing method for providing a disaster service signal and a broadcast relay apparatus implementing the same.

The present invention is derived from the research conducted as part of the IT industry source technology development project of the subject (Korea Communications Commission, Ministry of Knowledge Economy and Korea Institute of Industrial Technology Evaluation and Management) [Task Management No .: 2009-S-021-01, : Development of T-DMB disaster broadcasting technology for tunnel in same frequency network].

Terrestrial digital multimedia broadcasting (DMB) has been commercialized with the addition of a multimedia broadcasting service including a video service to the Eureka 147 based DAB (Digital Audio Broadcasting) system of Europe.

Recently, in order to improve the quality of broadcast signals 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 order to increase the broadcasting reception rate, such a digital multimedia broadcasting repeater needs to be installed not only in a shadow area but also in an area such as a tunnel or a subway.

The conventional terrestrial digital multimedia broadcasting repeater focuses on relaying broadcast signals of various channels. Such a broadcast relay device does not have a function capable of responding to an emergency situation. However, the broadcast relay apparatus performs the relay function of the broadcast signal for the specific area.

On the other hand, in the conventional digital multimedia broadcasting, the same broadcasting service is provided not only to a specific area but also to various areas. Also, only urgent broadcast or disaster broadcast services for the entire area can be provided, rather than a specific area. When an emergency occurs in a specific area, it is difficult to provide a disaster broadcasting service only in that area using digital multimedia broadcasting.

In addition, when a disaster broadcast signal is to be serviced using the above-described broadcast relay device, a disaster related signal generated in a specific region must be encoded into signals of various channels transmitted and received by the broadcast relay device, so that it corresponds to the number of channels in the broadcast relay device. Encoders must be installed separately. In this case, the configuration of the broadcast relay device is complicated.

The technical problem to be achieved by the present invention is to broadcast a disaster situation occurring in a specific area only to the corresponding area, to encode a disaster service signal of a specific area at a predetermined bit rate, and to insert a stream according to each of various channels of digital multimedia broadcasting. An object of the present invention is to provide a disaster broadcast providing method that contributes to serving a disaster broadcast through various channels.

Another technical problem to be solved by the present invention is to broadcast a disaster situation occurring in a specific area only to the corresponding area, to encode a disaster service signal of a specific area at a predetermined bit rate, and to insert a stream according to each of various channels of digital multimedia broadcasting. It is to provide a broadcast relay device that contributes to the service of disaster broadcast in various channels.

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

According to an aspect of the present invention for achieving the above technical problem, the disaster broadcast relay method encodes the disaster service signal at a predetermined bit rate, selectively inserts a null stream into the encoded disaster service signal (pad) Signal processing to generate a first disaster message signal having a first main service bit rate of a first broadcast channel that is greater than or equal to the bit rate; and selectively inserting and processing a null stream into the encoded disaster service signal to process the bit rate or more. And generating a second disaster message signal having a second main service bit rate of a second broadcast channel that is different from the first main service bit rate.

According to another aspect of the present invention for achieving the above technical problem, a broadcast relay device for digital multimedia broadcasting (DMB) for providing a disaster service signal, and inputs the disaster service signal to encode at a predetermined bit rate And selectively inserting a null stream into the encoded disaster service signal and processing the signal to have a first main service bit rate of a first broadcast channel that is greater than or equal to the bit rate and a second main service bit rate of a second broadcast channel. And a disaster message generator for generating first and second disaster message signals in parallel. A first disaster broadcasting multiplexer for multiplexing and transmitting the first disaster message signal to the standard of the first broadcast channel and a second disaster broadcast multiplexing to multiplex and transmit the second disaster message signal to the standard of the second broadcast channel Additional is provided.

According to another aspect of the present invention for achieving the above technical problem, a broadcast relay device is a broadcast relay device for digital multimedia broadcasting (DMB) for providing a disaster service signal consisting of a video signal, an audio signal and a data signal, And a disaster message generator for inputting the signal, the audio signal, and the data signal, encoding the respective signals at predetermined bit rates, and generating a plurality of spare frames obtained by multiplexing the encoded signals in a stream form. Demultiplexing the preliminary frame to recover the encoded signals and selectively nulling the encoded signals according to a first video main bit rate, a first audio main bit rate and a first data main bit rate of a first broadcast channel A first disaster broadcast multiplexer for inserting and multiplexing is provided. Demultiplexing the preliminary frame to recover the encoded signals, selectively nulling the encoded signals in accordance with a second video main bit rate, a second audio main bit rate, and a second data main bit rate, respectively, of the second broadcast channel; A second disaster broadcast multiplexer for inserting and multiplexing a stream is provided. The first and second main bit rates are each above the corresponding bit rate.

According to another aspect of the present invention for achieving the above technical problem, the broadcast relay apparatus encodes a disaster service signal at a predetermined bit rate, and selectively inserts and multiplexes a null stream into the encoded disaster service signal to A first main service bit rate of a first broadcast channel and a second main service bit rate of a second broadcast channel which are greater than or equal to a bit rate, and are respectively multiplexed to the standards of the first and second broadcast channels, respectively; 2 includes a disaster message generator for generating disaster message signals. First and second modulators are provided for modulating the first and second disaster message signals, respectively.

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

According to the present invention, a disaster service signal of a specific region is encoded at a predetermined bit rate by using a single encoder in the broadcast relay device, and selectively inserting null streams according to the main service bit rates of each of the various channels of the digital multimedia broadcasting. do. Accordingly, since the broadcast relay device does not need to include an encoder for each broadcast channel, the configuration of the broadcast relay device is simplified.

Disaster service signals into which null streams are inserted may be multiplexed into various broadcasting standards to serve disaster broadcasting so that disaster-related broadcasting of a specific region may be provided to various broadcast channels of users in the region.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings and the following description. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are being provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Like numbers refer to like elements throughout. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In this specification, the singular forms also include the plural unless specifically stated otherwise in the text. As used herein, “comprises” and / or “comprising” refers to the presence of one or more other components, steps, operations and / or elements in which the mentioned components, steps, operations and / or elements are known. Or does not exclude additions.

Hereinafter, a broadcast relay device used for digital multimedia broadcasting (DMB) for providing a disaster service signal according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 4. 1 is a broadcast relay apparatus according to embodiments of the present invention used for Digital Multimedia Broadcasting (DMB) for providing a disaster service signal.

Referring to FIG. 1, the broadcast relay device 10 used in the DMB for providing a disaster service signal is basically responsible for relaying signals of various channel broadcasts, and externally related to a disaster situation occurring in a specific area. Streams are provided to service the disaster service signals input from various channels and provide them to DMB terminals in the area. The broadcast relay apparatus 10 may be installed in a shadow area such as a building densely populated area, a mountain, a tunnel, or a subway to improve the quality of broadcast signals.

The broadcast relay device 10 receives a disaster service signal and generates a disaster message stream having a main service bit rate for each of various broadcast channels. The disaster message generator 100 multiplexes each of the disaster message streams to a standard of a corresponding broadcast channel. Disaster broadcast multiplexers 200a, 200b, 200c, modulators 300a, 300b, 300c for modulating each of the multiplexed disaster message streams, for example, Coded Orthogonal Frequency Division Multiplexing (COFDM), and broadcast channels, respectively. It may include relays (400a, 400b, 400c) for relaying the regular broadcast signal of. Here, the disaster broadcast multiplexers 200a, 200b, and 200c are provided with a number corresponding to the number of broadcast channels being relayed to receive the broadcast channels so that the main message bit rate for each broadcast channel is related to the disaster message generator 100. Information, identification information, and the like. The disaster message generator 100 may generate a disaster message stream using the above-described information.

In addition, the broadcast relay device 10 provides regular broadcast signals normally received from the relay units 400a, 400b, and 400c to the user's DMB terminal through the RF transmitter 600, and multiplexed disaster message streams in a specific region. In case of input, the switching unit 500 may further include a switching unit 500 that stops receiving normal broadcasting signals and provides multiplexed disaster message streams to various broadcasting channels of the DMB terminal through the RF transmitter 600. That is, when a disaster situation occurs, the switching unit 500 may switch and output the regular broadcast signal and the multiplexed disaster message stream under the control of the system controller 520. The RF transmitter 600 receives one of a regular broadcast signal and a multiplexed disaster message stream in each channel as an intermediate frequency (IF) band, for example, a channel signal having a system bandwidth of 1.536 MHz, and has a terrestrial DMB having a bandwidth of 6 MHz. It can send out channels.

In the embodiment of FIG. 1 and the following embodiments, there are three terrestrial DMB channels, and a disaster service signal includes an audio signal, a video signal, and a data signal. The apparatus may serve regular broadcast signals and multiplexed disaster message streams on more channels, the disaster service signal including at least one of an audio signal, a video signal and a data signal, as well as a digital audio broadcast (DMB) service. Digital Audio Broadcasting service or Digital Audio Broadcasting service is available.

FIG. 2 is a block diagram of a disaster message generator applied to the broadcast relay device according to the first embodiment of the present invention, and FIG. 3 is a block diagram of the null stream insertion unit shown in FIG.

Referring to FIG. 2, the disaster message generator 100 receives an audio signal, a video signal, and a data signal constituting the disaster message signal, respectively, and encodes the audio bit rate, the video bit rate, and the data bit rate into an audio encoder 110 and a video. It may include an encoder 112 and a data encoder 114. The audio signal may be input to the video encoder 112 along with the video signal and encoded to provide a DMB service. In addition, the audio bit rate, the video bit rate and the data bit rate may be set to corresponding predetermined bit rates, respectively. Here, the encoded video signal may be generated in the form of an ES (Elememt Stream) packet or a TS (Transport stream) packet.

Audio / video / data bit rates may be determined via the rate control unit 116. In detail, the rate control unit 116 receives first to third main service bit rates related information included in Fast Information Channels (FICs) of the first to third broadcast channels, and among them, a minimum primary The predetermined bit rates may be determined below the service bit rate. Here, each of the main service bit rates may be determined based on an audio main bit rate, a video main bit rate, and a data main bit rate for each broadcast channel. In summary, since the audio bit rate may be determined to be less than or equal to the first to third audio main bit rates, the audio bit rate may be determined to be equal to the minimum bit rate among the first to third audio main bit rates. Similarly, since the data bit rate may also be determined to be less than or equal to the first to third audio main bit rates, the data bit rate may be determined to be equal to the minimum bit rate among the first to third data main bit rates. However, the video bit rate may be smaller than the minimum bit rate among the first to third video main bit rates in consideration of bits added in an outer coding process. The bit rate determined thereby may be notified to the audio encoder 110, the video encoder 112, and the data encoder 114 through the rate controller 116.

The first through third TS packet parts 118a, 118b, and 118c receive identification information provided from the first through third disaster broadcast multiplexers 200a, 200b, and 200c, and receive an encoded video signal in the form of an ES packet. A TS may be output as a TS packetized video signal. The TS packet is a signal generated by packetizing the ES packet into MPEG-2.

In this case, the identification information may be information related to the sub channel data among the high speed information channel (FIC) and the sub channel data for each broadcast channel received by the first to third disaster broadcast multiplexers 200a, 200b, and 200c. Specifically, the sub channel data is a main service channel (MSC) and has a region to which audio / video / data signals are allocated in a broadcast channel, and identification information is an outer decoded video signal among these signals. Information related to the PAT PID, PMT PID, PCR PID, video and audio related PID, OD and BIFs PID, such as various PID information at the MPEG-2 level and various ES ID information corresponding to the MPEG-4 level can be. . Using such identification information, the first to third TS packet units 118a, 118b, and 118c may output 188byte TS packetized video signals through SL packetization, PES packetization, and TS multiplexing for each broadcast channel. have.

In an embodiment different from the above-described embodiment, the encoded video signal may be output from the video encoder 112 in the form of a TS packet rather than an ES packet. In this case, the video encoder 112 receives the identification information from the identification information analyzing units 214 of the first to third disaster broadcasting multiplexers 200a, 200b, and 200c, which will be described later, and uses the predetermined video. The TS packetized video signal corresponding to the bit rate may be output. Accordingly, the TS packet parts 118a, 118b, and 118c are omitted in this embodiment.

The disaster message generator 100 receives the encoded audio signal, the TS packetized video signal, and the encoded data signal and selectively inserts null streams according to each of the main service bit rates of the first to third broadcast signals. The first to third null stream padding units 120a, 120b, and 120c may be included. Each of the null stream inserters 120a, 120b, and 120c includes an audio null inserter 122 and a video null inserter 124 for selectively inserting a null stream into the encoded signals, respectively, as shown in FIG. ) And a data null inserter 126.

In detail, each of the null stream inserters 120a, 120b, and 120c may include the first to third weeks included in the first to third fast information channels (FICs) of the first to third broadcast channels. The service bit rates related information may be received through the rate controller 116. In this case, each of the main service bit rates may be determined based on the audio main bit rate, the video main bit rate, and the data main bit rate. Accordingly, in order to determine the size of the null stream selectively inserted into each of the encoded signals, the rate controller 116 determines the audio null inserter 122, the video null inserter 124, and the data for the corresponding broadcast channel. The null inserter 126 may provide information related to audio / video / data main bit rates of the corresponding broadcast channel.

In the case of three broadcast channels as in the embodiment of FIG. 1, the audio main bit rates, the video main bit rates and the data main bit rates are respectively the first to third audio main bit rates and the first to third video main bit rates. And first to third data main bit rates. The audio main bit rate, the video main bit rate, and the data main bit rate may be bit rates respectively set for the audio service, the video service, and the data service within a specific broadcast channel. In addition, at least one of the first to third audio main bit rates may be set to be different from the remaining audio main bit rates. Similarly, the first to third video main bit rates and the first to third data main bit rates may also be set to be different from each other as in the case of the first to third audio main bit rates.

Selectively inserting a null stream in correspondence with the audio encoder 110, the video encoder 112, the data encoder 114, the first to third TS packet parts 118a, 118b, and 118c and the main bit rates for each broadcast channel. A process in which a disaster service signal is processed using the null stream insertion units 120a, 120b, and 120c will be described as an example.

The disaster service signal may be composed of an audio signal, a video signal, and a data signal as described above. The ensemble of the first broadcast channel has a first audio main bit rate of 128 Kbps, a first video main bit rate of 544 Kbps, and a first data main bit rate of 96 Kbps, and an ensemble of a second broadcast channel. The second audio main bit rate of 96 Kbps, the second video main bit rate of 512 Kbps and the second data main bit rate of 128 Kbps, the ensemble configuration of the third broadcast channel is the third audio main bit rate of 192 Kbps, 544 Kbps Assume that it has a third video main bit rate and a third data main bit rate of 64 Kbps.

Under this assumption, the audio encoder 110 encodes the audio signal at 96 Kbps or less, which is the minimum bit rate among the audio main bit rates described above. Similarly, data encoder 114 encodes the data signal at 64 Kbps or less. However, when the encoded video signal is generated as an element stream (ES) packet, the video encoder 112 encodes the video signal to less than 512 Kbps in consideration of bits added in an outer coding process later. In addition, the encoded video signal generates 188 bytes of TS packetized video signals that are not externally encoded to correspond to each of the identifications of the broadcast channels via the first through third TS packet parts 118a, 118b, and 118c. .

When the audio bit rate is determined to be 96 Kbps to encode the audio signal, the audio null inserter 122 of the first null stream inserter 120a adds a null stream corresponding to 32 (128 96) Kbps to the encoded audio signal. The audio null inserter of the third null stream inserter 120c inserts a null stream corresponding to 96 (192-96) Kbps. In this case, since the encoded audio signal is equal to the second audio main bit rate of 96 Kbps, the audio null inserter of the second null stream inserter 120c does not need to insert a null stream into the encoded audio signal. That is, a null stream is inserted into the encoded audio signal in accordance with the first to third audio main bit rates. This insertion of the null stream is known as the null stream is " optionally " inserted into the encoded signal. Similarly, the data null inserters 126 of the first to third null stream inserters 120a, 120b and 120c also selectively insert a null stream into the data signal encoded according to the first to third data main bit rates. do.

However, in the case of transport stream (TS) packetized video signals, the video null inserters 124 of the first to third null stream inserters 120a, 120b, and 120c may add bits to be added in an external encoding process. In consideration, a null stream is selectively inserted into each of the TS packetized video signals to be lower than the first to third video main service rates.

Meanwhile, the disaster message generator 100 inserts a null stream among the TS packetized video signals passed through the video null inserters 124 of the first to third null stream inserters 120a, 120b, and 120c. First to third external encoders for externally encoding the corrected video signal and the uncorrected video signal together with the first to third time information correctors 130a, 130b and 130c for correcting the time information of the corrected video signal. It may further include (140a, 140b, 140c).

The first to third time information correctors 130a, 130b, and 130c may include a Program Clock Reference (PCR), an Object Clock Reference (OCR), a Decoding Time Stamp (CTS), and a CTS included in a video signal into which a null stream is inserted. A composition time stamp (PTS), a presentation time stamp (PTS), a continuity counter (Continuity_counter) of a TS packet, and the like may be modified based on the elapsed time of insertion of a null stream. Accordingly, the corrected video signal can serve a continuous picture to the DMB terminal without generating a decoding error in the DMB terminal.

The first to third outer coders 140a, 140b, and 140c include error correction encoding and convolution interleaving processes. For example, the Reed-Solomon technique can be used for the error correction coding. In the case where the encoded signal consisting of the above-described TS packet of 188 bytes is externally encoded, both the corrected video signal and the uncorrected video signal are inputted to the first to third external encoders 140a, 140b, and 140c and 204 bytes. It is output including TS packet. In addition, the corrected or uncorrected video signals are input to the first to third external encoders 140a, 140b, and 140c, respectively, and are output in accordance with the first to third video main bit rates. Through this external encoding, video signals transmitted to the DMB terminal are robust to errors generated during the wireless transmission process.

The disaster service signal including the above-described audio signal, video signal, and data signal includes encoders 110, 112, 114, null stream inserters 120a, 120b, and 120c, and time information correctors 130a, 130b, and 130c. And audio signals having first to third audio main bit rates, video signals having first to third video main bit rates, and first to third video main processing through the outer coders 140a, 140b, 140c. Are output as data signals having bit rates. Thereby, the audio / video / data signals having the first audio / video / data main bit rates constitute the first disaster message signal. Each of the second and third disaster message signals also consists of audio / video / data signals having corresponding audio / video / data main bit rates.

The disaster message generator 100 multiplexes an audio signal, a video signal, and a data signal included in each of the first to third disaster message signals to generate first to third disaster message streams. Stream portions 150a, 150b, 150c may further be included. The disaster message streams may be transmitted to the first to third disaster broadcast multiplexers 200a, 200b, and 200c for each broadcast channel.

4 is a disaster broadcasting multiplexer applied to the broadcast relay device according to the first embodiment of the present invention. Since the first to third disaster broadcast multiplexers 200a, 200b, and 200c have the same structure, the first disaster broadcast multiplexer 200a will be described.

The disaster broadcasting multiplexer 200a may include an RF receiver 210 which receives a regular broadcast signal of a broadcast channel through an antenna and extracts a fast information channel (FIC) and subchannel data. The high speed information channel may be audio / video / data main bit rates and broadcast channel information for various information. The fast information channel includes channel information on the number of services and the size of service data provided in the current broadcast channel in addition to the main bit rates. In addition, as described above, the sub channel data is a main service channel (MSC), and bit rates of audio / video / data signals allocated to the main service channel are the same as the audio / video / data main bit rates.

The disaster broadcasting multiplexer 200a may include a subchannel analyzer 212 that analyzes an external coded part included in the video signal of the subchannel data, identification information, and information related to the video main bit rate. In addition, the identification information analyzer 214 may outer-decode the video signal according to the analyzed video signal, extract the identification information, and transmit the identification information to the first TS packet unit 118a.

The disaster broadcasting multiplexer 200a extracts information related to the audio / video / data main bit rates from the high-speed information channel and transmits the information to the rate control unit 116 to the FIC analysis unit 220, the subchannel data, and the broadcast included in the FIC. The apparatus may further include an ETI frame generator 230 for generating an ETI (Ensemble Transport Interface) signal based on the channel information. The ETI signal may include a main service channel and a fast information channel from which a regular broadcast signal is removed, and may be generated to have a broadcast channel specification.

In addition, the disaster broadcast multiplexer 200a receives an emergency message stream output from the disaster message stream unit 150a and an ensemble multiplexer 240 and an ETI signal that are multiplexed into an ETI signal conforming to the broadcast channel specification. ETI output unit 250 for outputting the multiplexed disaster message stream to the modulator.

According to an embodiment of the present invention, audio / video / data signals related to a disaster situation occurring in a specific area are encoded at predetermined bit rates using audio / video / data encoders 110, 112, and 114, Null streams are selectively inserted in accordance with the main bit rates of each of the various broadcast channels of the DMB. Disaster service signals into which null streams are inserted may be multiplexed into various broadcasting standards to serve disaster broadcasting so that disaster-related broadcasting of a specific region may be provided to various broadcasting channels of the DMB terminal of the region. In addition, encoders for encoding audio / video / data signals at the main bit rates of various broadcast channels need not be provided corresponding to the number of broadcast channels, but by using one encoder respectively corresponding to audio, video and data. The configuration in the broadcast relay device 10 can be simplified.

Hereinafter, a broadcast relay apparatus used for digital multimedia broadcasting (DMB) for providing a disaster service signal according to a second embodiment of the present invention will be described in detail with reference to FIGS. 1, 5, and 6. Let's do it. 5 is a disaster message generator applied to a broadcast relay device according to a second embodiment of the present invention. The relays 400a, 400b, 400c, the modulators 300a, 300b, 300c, the switching unit 500, and the RF transmitter 600 of the second embodiment are substantially the same as those mentioned in the first embodiment. The description will be omitted.

Referring to FIG. 5, the disaster message generator 100 encodes an audio signal, a video signal, and a data signal related to a disaster situation at an audio bit rate, a video bit rate, and a data bit rate, respectively, and a video encoder ( 712 and data encoder 714. In this case, each of the audio / video / data bit rates may be set by being notified of the corresponding bit rates determined by the bit rate controller 716.

The bit rate controller 716 may determine the audio / video / data bit rates based on the fast channel information FIC for each broadcast channel transmitted from the first to third disaster broadcast multiplexers 200a, 200b, and 200c. In detail, the bit rate controller 716 may adopt the audio bit rate below the minimum audio main bit rate among the audio main bit rates of the main service channel included in the fast channel information. Similarly, the bit rate control unit 716 can adopt the data bit rate below the minimum data main bit rate. However, the video bit rate may be smaller than the minimum bit rate among the video main bit rates in consideration of bits added in an outer coding process later. The video signal encoded at this video bit rate may be generated in the form of an ES (Elememt Stream) packet.

In addition, the bit rate controller 716 may transmit the audio / video / data bit rate related information to the first to third disaster broadcast multiplexers 200a, 200b, and 200c.

The disaster message generator 100 generates a preliminary frame generator 720 and a preliminary frame, which generate a preliminary frame obtained by multiplexing an ES packet type video signal in a stream form together with the encoded audio and data signals. It may include a preliminary frame distribution unit 730 distributed to the disaster broadcasting multiplexers (200a, 200b, 200c). In this case, the preliminary frame may include a frame in the form of a service transport interface (STI), an asynchronous serial interface (ASI), an internet protocol (IP), and an ETI.

6 is a disaster broadcasting multiplexer applied to a broadcast relay device according to another embodiment of the present invention. Since the first to third disaster broadcast multiplexers 200a, 200b, and 200c have the same structure, the first disaster broadcast multiplexer 200a will be described.

Referring to FIG. 6, the disaster broadcast multiplexer 200a includes a preliminary frame analyzer 805 which demultiplexes distributed preliminary frames to recover the ES packet type video signal as well as the encoded audio and data signals. can do.

In addition, the disaster broadcast multiplexer 200a may include a TS packet unit 840 for outputting an ES packet-type video signal recovered using identification information as a TS packetized video signal. The identification information may be video signal related information in sub-channel data for each broadcast channel received through the RF receiver 825. Such identification information may be provided to the TS packet unit 840 through the sub channel analyzer 830 and the identification information analyzer 835.

In an embodiment different from the above-described embodiment, the encoded video signal may be output from the video encoder 712 in the form of TS packets rather than in the form of ES packets. In this case, the video encoder 712 receives the identification information from the identification information analyzers 835 of the first to third disaster broadcast multiplexers 200a, 200b, and 200c, which will be described later, and uses the predetermined video. The TS packetized video signal corresponding to the bit rate may be output. Accordingly, the TS packet parts 840 are omitted in this embodiment.

The sub channel analyzer 830, the identification information analyzer 835, the TS packet unit 840, and the identification information according to the present exemplary embodiment may include the sub channel analyzer 212 and the identification information analyzer (referred to in the embodiment of FIG. 4). 214, the TS packet unit 118a and the identification information have substantially the same function and / or structure, so a detailed description thereof will be omitted.

 Meanwhile, the disaster broadcast multiplexer 200a inserts a null stream for selectively inserting a null stream in accordance with audio / data / video main bit rates of a corresponding broadcast channel in addition to the encoded audio and data signals. The unit 810 may include a rate controller 850 for determining the size of the null stream to be inserted and for notifying information about main bit rates of the corresponding channel. The rate controller 850 may determine the size of the null stream to be inserted in consideration of the main bit rates of the fast information channels provided by the FIC analyzer 845 and the encoding bit rates provided from the bit rate controller 716. Also in this embodiment, the null stream may be selectively inserted into the TS packetized video signal to be lower than the video main bit rate in consideration of bits added in a later external encoding.

In addition, the null stream inserter 810 includes an audio null inserter, a video null inserter, and a video null inserter as shown in FIG. 3 to selectively insert a null stream into the TS packetized video signal together with the encoded audio and data signals. It may include a data null insert. Since the null stream insertion unit 810 and the rate control unit 850 of the present embodiment have substantially the same functions and structures as the null stream insertion unit 120a and the rate control unit 116 shown in FIG. 2, a description thereof will be omitted. Let's do it.

In addition, the disaster broadcasting multiplexer 200a may include a time information encoder 815 for correcting time information of a video signal into which a null stream is inserted among TS packetized video signals passed through the null stream inserter 810; The apparatus may further include an external encoder 820 for performing external encoding on the corrected or uncorrected video signal. Since the time information corrector 815 and the external encoder 820 of the present embodiment have substantially the same functions and structures as the time information corrector 140a and the external encoder 150a shown in FIG. Will be omitted.

In addition, the disaster broadcast multiplexer 200a may include an ETI frame generator 860, an ensemble multiplexer 865, and an ETI output unit 870, like the disaster broadcast multiplexer 200a illustrated in FIG. 4. have. The RF receiver 825, the FIC analyzer 845, the ETI frame generator 840, and the ETI output unit 850 of the present embodiment are the RF receiver 210, the FIC analyzer 220, and the ETI illustrated in FIG. 4. Since the frame generating unit 230 and the ETI output unit 250 have substantially the same functions and structures, description thereof will be omitted. However, the ensemble multiplexer 865 may receive the externally encoded video signal together with the audio and data signals passing through the null stream inserter, and multiplex the signals into an ETI signal. In this case, this multiplexing is possible because the audio and data signals and the externally encoded video signal that have passed through the null stream inserter are set to the audio main bit rate, the data main bit rate and the video main bit rate, respectively.

According to the present embodiment, not only has the same effect as in the embodiment of FIGS. 1 to 4, but also the configuration of the disaster message generating unit can be simplified to reduce the burden of the function of the disaster message generating unit.

Hereinafter, a broadcast relay device used for digital multimedia broadcasting (DMB) for providing a disaster service signal according to a third embodiment of the present invention will be described in detail with reference to FIGS. 1, 7, and 8. FIG. 7 is a disaster message generator applied to a broadcast relay device according to a third embodiment of the present invention, and FIG. 8 is a disaster broadcast multiplexer applied to a broadcast relay device according to a third embodiment of the present invention.

The broadcast relay device of the third embodiment is different from the broadcast relay device of the first embodiment in the following points.

Referring to FIGS. 7 and 8, the disaster message generator 100 receives a disaster content playback unit 902 for receiving and storing a disaster signal for each disaster situation from a storage interface, and a disaster transmitted from an external control center or a user of a specific region. And a GUI / transmission rate controller 916 which receives the occurrence related signal and reproduces the disaster content by the disaster content playback unit 902. In this case, in the first embodiment, the disaster service signal is input to the disaster message generator. In the third embodiment, the disaster message generator 100 receives the disaster signal and receives the disaster signal from the disaster content playback unit 902. Play the corresponding disaster content.

The disaster content may be composed of an audio signal, a video signal, and a data signal corresponding to each disaster situation. For example, in the event of a disaster, such as a car accident in a tunnel or an obstacle or a broken vehicle, disaster content may include audio signals such as announcements, data signals such as text, and contextual information. It is represented by a video signal. As described above, the disaster content generation unit 902 may receive new disaster situation related information from the storage interface and store content for various disaster situations.

The disaster message generator 100 transmits the audio signal, the video signal, and the data signal constituting the disaster content through the audio encoder 910, the video encoder 912, and the data encoder 914, respectively. Is encoded. The audio signal may be input and encoded with the video signal to the video encoder 912 to provide a DMB service. In addition, the audio bit rate, the video bit rate and the data bit rate may be set to corresponding predetermined bit rates, respectively. In this case, the audio / video / data bit rates may be determined via the GUI / rate control 916. In detail, the GUI / rate control unit 916 includes first to third channels included in fast information channels (FICs) of the first to third broadcast channels provided through the broadcasting-specific FIC analyzers 1020. Receive main service bit rates related information and determine predetermined bit rates below the minimum main service bit rate.

1, 9 and 10, a broadcast relay device used for digital multimedia broadcasting (DMB) for providing a disaster service signal according to a fourth embodiment of the present invention will be described in detail. 9 is a disaster message generator applied to a broadcast relay device according to a fourth embodiment of the present invention, and FIG. 10 is a disaster broadcast multiplexer applied to a broadcast relay device according to a fourth embodiment of the present invention.

The broadcast relay device of the fourth embodiment is different from the broadcast relay device of the second embodiment in the following points.

Referring to FIG. 9, the disaster message generation unit 100 receives a disaster content playback unit 1102 for receiving and storing disaster content for each disaster situation from a storage interface and a disaster occurrence related signal transmitted from an external control center or a user in a specific region. And a GUI control unit 1116 for causing the disaster content playback unit 1102 to play the disaster content. Here, since the disaster content generation unit 1102 has substantially the same function and structure as the disaster content generation unit 902 shown in FIG. 7, a detailed description thereof will be omitted.

The audio signals, video signals, and data signals constituting the disaster content are encoded at a predetermined audio bit rate, video bit rate, and data bit rate through the audio encoder 1110, the video encoder 1112, and the data encoder 1114, respectively. In this case, each of the audio / video / data bit rates may be set by being notified of the corresponding bit rates determined by the GUI controller 1116. In detail, the GUI controller 1116 may determine audio / video / data bit rates based on the broadcast channel-specific fast channel information (FIC) transmitted from the first to third disaster broadcast multiplexers 200a. For example, the GUI controller 1116 may adopt the audio bit rate below the minimum audio main bit rate among the audio main bit rates of the main service channel included in the fast channel information.

Referring to FIG. 10, the disaster broadcast multiplexer 200a may include a rate controller 1250 that determines a size of a null stream to be inserted and notifies the null stream inserter 1210 of information about main bit rates of a corresponding channel. have. The rate controller 1250 may determine the size of the null stream to be inserted in consideration of the main bit rates of the fast information channels provided by the FIC analyzer 1245 and the encoding bit rates provided by the GUI controller 1116. Also in the fourth embodiment, a null stream may be selectively inserted into the TS packetized video signal to be lower than the video main bit rate in consideration of bits added in a later external encoding.

Hereinafter, a disaster broadcast providing method according to embodiments of the present invention will be described with reference to FIGS. 1 to 4, 11, and 12. This embodiment is a method of providing a disaster broadcast for providing a disaster service signal by using the broadcast relay device of the embodiment of FIGS. 1 to 4. 11 is a flowchart illustrating a disaster broadcast providing method for providing a disaster service signal using a broadcast relay device according to embodiments of the present invention, and FIG. 12 is a flowchart illustrating a process of correcting time information of a video signal and an external encoding process. to be.

In the description of the method, a case where two broadcast channels are included and a disaster service signal includes an audio signal, a video signal, and a data signal will be described as an example.

Referring to FIG. 11, the relay units 400a and 400b relay regular broadcast signals of the first and second broadcast channels, and the first and second disaster broadcast multiplexers 200a and 200b transmit regular broadcast signals. After receiving, the FIC analyzer 220 extracts sub channel data having information on the first and second high speed information channels corresponding to the broadcast channels and the main service channels for the broadcast channels, respectively. The high speed information channels have information about the first and second main service bit rates. In this case, the first main service bit rate is determined based on the first audio main bit rate, the first video main bit rate, and the first data main bit rate assigned to the main service channel, and the second main service bit rate is assigned to the main service channel. The second audio main bit rate, the second video main bit rate, and the second data main bit rate.

 Subsequently, the first and second null stream inserters 120a and 120b may receive information regarding audio / video / data main bit rates of the corresponding broadcast channel through the rate controllers 116 (S1300).

Subsequently, when a disaster situation occurs in a specific region (S1310), a disaster service signal composed of an audio signal, a video signal, and a data signal is generated, and the disaster message generating unit 100 of the broadcast relay device 10 installed in the specific region. May receive a disaster service signal (S1320).

Next, the audio encoder 110, the video encoder 112, and the data encoder 114 may encode audio / video data signals at predetermined audio bit rates, video bit rates, and data bit rates, respectively (S1330). In this case, the rate control section 116 determines that each of the audio / video / data bit rates is set to be less than or equal to the audio main bit rates, the video main bit rates, and the data bit rates of the broadcast channels. 112 and data encoder 114 may be notified.

That is, the audio bit rate may be equal to the minimum bit rate of the first and second audio main bit rates. Similarly, the first and second data main bit rates are also set above the data bit rate set in the encoding process. Accordingly, the data bit rate may also be equal to the minimum bit rate of the first and second data main bit rates. However, the video bit rate may be smaller than the minimum bit rate among the first and second video main bit rates in consideration of bits added in an outer coding process. In this case, the encoded video signal may be generated in an ES (Elememt Stream) packet form or a TS packet form.

Subsequently, a null stream may be selectively inserted into the encoded disaster service signal and signal processed (S1340). In the case where the disaster service signal is composed of audio / video / data signals, the specific process of this step is as shown in FIG.

First, the first and second TS packet parts 118a and 118b may convert an ES packet type video signal into a TS packetized video signal using the identification information provided to the identification information analyzers 214 and output the converted TS signal. (S1342).

In an embodiment different from the above-described embodiment, the encoded video signal may be output from the video encoder 112 in the form of a TS packet rather than an ES packet. In this case, the video encoder 112 receives the identification information from the identification information analyzing units 214 of the first to third disaster broadcasting multiplexers 200a, 200b, and 200c, which will be described later, and uses the predetermined video. The TS packetized video signal corresponding to the bit rate may be output. Accordingly, in this embodiment, the TS packet parts 118a, 118b, and 118c are omitted, and the TS packetized video signal is output directly through the video encoder 112.

Subsequently, the audio null stream unit 122 may generate signals in which a null stream is selectively inserted into an audio signal encoded according to the first and second audio main bit rates, respectively. Similarly, the data null stream unit 126 may generate signals by selectively inserting a null stream into the encoded data signal. However, the video null stream unit 124 may generate signals by selectively inserting a null stream into the TS packetized video signal in consideration of bits added during an outer coding process (S1344). The size of the null stream to be inserted may be determined by the rate controller 716 to be notified to the audio null inserter 122, the video null inserter 124, and the data null inserter 126.

Next, the first and second time correction correctors 130a and 130b may correct the time information of the video signal into which the null stream is inserted (S1346). Subsequently, the first and second external encoders 140a and 140b may externally process the corrected video signal and the video signal without correction (S1348). Such time information correction and external coding are substantially the same as the operations described in the time information correcting units 130a, 130b and 130c and the external coders 140a, 140b and 140c mentioned in the embodiments of FIGS. .

By proceeding with the above processes, the audio signal having the first and second audio main bit rates, the video signal having the first and second video main bit rates, as well as the data signal having the first and second data main bit rates Output to Thereby, the audio / video / data signals having the first audio / video / data main bit rates constitute the first disaster message signal. The second disaster message signal is also composed of audio / video / data signals with corresponding audio / video / data main bit rates.

Next, the first and second disaster message stream units 150a and 150b may multiplex audio / video / data signals having main bit rates included in the first and second disaster message signals (S1350).

Subsequently, the ensemble multiplexers 240 may multiplex the multiplexed disaster message signals into ETI signals including a fast information channel and a main service channel in operation S1360. Thereafter, the switching unit 500 may stop the regular broadcast signal of the broadcast channel, and the ETI signals for each broadcast channel may be modulated and transmitted to the user DMB terminal in a specific region.

In the disaster broadcasting providing method according to the present embodiment, the broadcast relay device of the first embodiment has been described mainly. However, the method of the present embodiment is substantially the same as the above-described method except for the following matters in the case of the broadcast relay device of the third embodiment. Same as When a disaster situation occurs in step S1320, the disaster content generation unit 902 of FIG. 7 may output a disaster service signal by reproducing stored disaster content corresponding to a disaster signal received from the outside.

Hereinafter, a disaster broadcast providing method according to another embodiment of the present invention will be described with reference to FIGS. 1, 5, 6, and 13. This embodiment is a method of providing a disaster broadcast for providing a disaster service signal by using the broadcast relay apparatus of the embodiments of FIGS. 1, 5, and 6. 13 is a flowchart illustrating a disaster broadcast providing method for providing a disaster service signal using a broadcast relay device according to another embodiment of the present invention. In the description of the method, two broadcast channels are described as an example.

Referring to FIG. 13, the relay units 400a and 400b relay regular broadcast signals of the first and second broadcast channels, and the first and second disaster broadcast multiplexers 200a and 200b transmit regular broadcast signals. Subsequently, the first and second high speed information channels corresponding to the broadcast channels and the sub channel data having information of the main service channels for each broadcast channel are extracted through the FIC analyzers 830. The fast information channels are allocated to the main service channel of the second broadcast channel, along with information about the first audio main bit rate, the first video main bit rate, and the first data main bit rate assigned to the main service channel of the first broadcast channel. And a second audio main bit rate, a second video main bit rate, and a second data main bit rate.

 Subsequently, the first and second null stream inserters 810 may receive information regarding audio / video / data main bit rates of the corresponding broadcast channel through the rate controllers 835 (S1400).

Subsequently, when a disaster situation occurs in a specific area (S1410), an audio signal, a video signal, and a data signal related to a disaster are generated, and the disaster message generator 100 of the broadcast relay device 10 installed in the specific area generates a disaster service signal. It may be received (S1420).

Next, the audio encoder 710, the video encoder 712, and the data encoder 714 may encode audio / video data signals at a predetermined audio bit rate, video bit rate, and data bit rate, respectively (S1430). In this case, each of the audio / video / data bit rates is set below the audio main bit rates, the video main bit rates and the data bit rates of the broadcast channels. However, the video signal to be encoded is smaller than the minimum bit rate among the first and second video main bit rates in consideration of bits added during an outer coding process, and is in the form of an ES (Elememt Stream) packet or a TS packet. This process is substantially the same as step S930, and thus a detailed description thereof will be omitted.

Subsequently, the preliminary frame generator 720 may generate a preliminary frame by multiplexing the encoded audio / video / data signals (S1440). In this case, the preliminary frame may include a frame in the form of a service transport interface (STI), an asynchronous serial interface (ASI), an internet protocol (IP), and an ETI.

Next, the preliminary frame distributor 730 may distribute the first and second disaster broadcast multiplexers 200a and 200b, respectively (S1450).

Subsequently, the preliminary frame analyzers 805 of the first and second disaster broadcast multiplexers 200a and 200b may demultiplex the preliminary frame to recover encoded audio / video / data signals (S1460).

Subsequently, the TS packet units 840 may convert the ES packet type video signal into a TS packetized video signal by using the identification information provided to the identification information analyzers 835 (S1470). This process is substantially the same as step S1342, so a detailed description thereof will be omitted. This process may be omitted when the encoded video signal is output from the video encoder 712 in TS packet form instead of ES packet form. In this case, the video encoder 712 receives the identification information from the identification information analyzers 835 of the first to third disaster broadcast multiplexers 200a, 200b, and 200c, which will be described later, and uses the predetermined video. The TS packetized video signal corresponding to the bit rate may be output. Accordingly, in this embodiment, the TS packet parts 118a, 118b, and 118c are omitted, and the TS packetized video signal is output directly through the video encoder 112.

Subsequently, the null stream inserters 810 of the first and second disaster broadcast multiplexers 200a and 200b may selectively insert a null stream into the encoded audio and data signals and the TS packetized video signal and process the signal. It may be (S1480). The size of the null stream to be inserted may be determined by the rate controller 850 to be notified to the null stream inserters 810. When the rate controller 850 determines the size of the null stream to be inserted, the main bit rates provided by the FIC analyzer 845 and the encoding bit rates provided to the bit rate controller 716 may be considered. Processes other than these are substantially the same as step S1344, so a detailed description thereof will be omitted. In addition, in the present embodiment, time information correction and external encoding processes may be performed on the TS packetized video signal, which is substantially the same as steps S1346 and S1348.

Next, the ensemble multiplexers 865 may multiplex audio / video / data signals in which a null stream is selectively inserted into ETI signals including a fast information channel and a main service channel (S1490). Thereafter, the switching unit 500 may stop the regular broadcast signal of the broadcast channel, and the ETI signals for each broadcast channel may be modulated and transmitted to a user DMB terminal in a specific region.

In the disaster broadcasting providing method according to the present embodiment, the broadcast relay device of the second embodiment has been described mainly. However, the method of the present embodiment is substantially the same as the method described above except for the following matters in the method of the present embodiment. Same as When a disaster situation occurs in step S1420, the disaster content generation unit 1102 of FIG. 9 may output a disaster service signal by reproducing stored disaster content corresponding to a disaster signal received from the outside.

Hereinafter, a broadcast relay device used for digital multimedia broadcasting (DMB) for providing a disaster service signal according to a fifth embodiment of the present invention will be described in detail with reference to FIGS. 14 and 15. 14 is a broadcast relay device according to other embodiments of the present invention used for digital multimedia broadcasting (DMB) for providing a disaster service signal, and FIG. 15 is applied to a broadcast relay device according to a fifth embodiment of the present invention. It is a disaster message generator.

The modulators 1600a, 1600b, 1600c, the relays 1700a, 1700b, 1700c, the switching unit 1800 and the RF transmitter 1830 of the present embodiment are substantially the same as those mentioned in the embodiments of Figs. As it is the same as the description thereof will be omitted. In the configuration of this embodiment, all the functions of the disaster broadcasting multiplexers are included in the disaster message generating unit 1500 so as to simplify the configuration of the broadcast relay apparatus by omitting a module such as the disaster broadcasting multiplexers shown in the first embodiment. Is different from the first embodiment. In detail, audio / video / data encoders 1512, 1514, and 1516, TS packet units 1520a, 1520b, and 1520c, null stream insertion units 1530a, 1530b, and 1530c, time information correction units 1540a, 1540b, 1540c), the external encoders 1550a, 1550b, and 1550c, the FIC analyzer 1506 and the RF receiver 1506 are substantially identical in function to those mentioned in the first embodiment, and thus differ from the first embodiment. This will be described mainly.

Referring to FIGS. 14 and 15, the disaster message generator 1500 generates disaster message streams having main service bit rates of various broadcast channels by using a disaster service signal transmitted for each disaster situation, and describes the specifications of the corresponding broadcast channel. Multiplexing is performed to output the modulators 1600a, 1600b, and 1600c. Here, the disaster message generation unit 1500 may grasp the main service bit rate related information and identification information for each broadcasting channel by receiving the broadcasting channels, and may generate an ETI-type frame by using the information.

In detail, the disaster message generator 1500 multiplexes the audio / video / data signals having the aforementioned main bit rates based on the broadcast channel information included in the sub channel data and the fast information channels for each broadcast channel. The third ETI frame generators 1560a, 1560b, and 1560c may be included. In this case, the first to third ETI frame generators 1560a, 1560b, and 1560c receive the subchannel data from the subchannel analyzer 1504 and receive the fast information channels from the FIC analyzer 1506. Can be. As a result, the first ETI frame generator 1560a may generate a first disaster message signal in which audio / video / data signals having first audio / video / data main bit rates are multiplexed in the form of an ETI frame. Similarly, the second and third ETI frame generators 1560b and 1560c may also generate second and third disaster message signals similar to those of the first disaster message signal. These disaster message signals are input to the modulators 1600a, 1600b, 1600c.

Hereinafter, a broadcast relay device used for digital multimedia broadcasting (DMB) for providing a disaster service signal according to a sixth embodiment of the present invention will be described in detail with reference to FIGS. 14 and 16. 16 is a disaster message generator applied to a broadcast relay device according to a sixth embodiment of the present invention. The relays, modulators, switchers, and RF transmitters of the sixth embodiment are substantially the same as those mentioned in the fifth embodiment, and description thereof will be omitted.

The broadcast relay device of the sixth embodiment differs from the broadcast relay device of the fifth embodiment in the following points.

Referring to FIG. 16, the disaster message generating unit 1500 receives a disaster content playback unit 1910 for receiving and storing a disaster signal for each disaster situation from a storage interface, and a disaster occurrence related signal transmitted from an external control center or a user in a specific region. And a GUI / transmission rate control unit 1912 for reproducing the disaster content by the disaster content playback unit 1910. In this case, in the fifth embodiment, the disaster service signal is input to the disaster message generator 1500. In the sixth embodiment, the disaster message generator 1500 receives the disaster signal and sends it to the disaster content playback unit 1910. Play the disaster content corresponding to the disaster signal.

The disaster message generator 1500 transmits the audio signal, the video bit rate, and the data bit rate through the audio encoder 1914, the video encoder 1916, and the data encoder 1918, respectively, to configure the audio signal, the video signal, and the data signal constituting the disaster content. Is encoded. In this case, the audio bit rate, the video bit rate and the data bit rate may each be set to corresponding predetermined bit rates. In this case, the audio / video / data bit rates can be determined via the GUI / rate control 1912. In detail, the GUI / rate control unit 1912 may include first to third channels included in fast information channels (FICs) of the first to third broadcast channels provided through the FIC analysis unit 1906 for each broadcast. Receive main service bit rates related information and determine predetermined bit rates below the minimum main service bit rate. In addition, the GUI / rate control unit 1912 may determine the size of the null stream to be inserted and notify the null stream inserters 1930a, 1930b, and 1930c of information on the main bit rates of the corresponding channel.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, I will understand. Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by all changes or modifications derived from the scope of the appended claims and the appended claims.

1 is a broadcast relay apparatus according to embodiments of the present invention used for Digital Multimedia Broadcasting (DMB) for providing a disaster service signal.

2 is a block diagram of a disaster message generator applied to the broadcast relay device according to the first embodiment of the present invention.

3 is a block diagram of a null stream inserter shown in FIG. 2.

4 is a disaster broadcasting multiplexer applied to the broadcast relay device according to the first embodiment of the present invention.

5 is a disaster message generator applied to a broadcast relay device according to a second embodiment of the present invention.

6 is a disaster broadcasting multiplexer applied to a broadcast relay device according to a second embodiment of the present invention.

7 is a disaster message generator applied to a broadcast relay device according to a third embodiment of the present invention.

8 is a disaster broadcasting multiplexer applied to a broadcast relay device according to a third embodiment of the present invention.

9 is a disaster message generator applied to a broadcast relay device according to a fourth embodiment of the present invention.

10 is a disaster broadcast multiplexer applied to a broadcast relay device according to a fourth embodiment of the present invention.

11 is a flowchart illustrating a disaster broadcast providing method for providing a disaster service signal using a broadcast relay device according to embodiments of the present invention.

12 is a flowchart illustrating a process of correcting time information and external encoding of a video signal.

13 is a flowchart illustrating a disaster broadcast providing method for providing a disaster service signal using a broadcast relay device according to another embodiment of the present invention.

14 is a broadcast relay apparatus according to other embodiments of the present invention used for digital multimedia broadcasting (DMB) for providing a disaster service signal.

15 is a disaster message generator applied to a broadcast relay device according to a fifth embodiment of the present invention.

16 is a disaster message generator applied to a broadcast relay device according to a sixth embodiment of the present invention.

Claims (20)

A method of providing a disaster broadcast for providing a disaster service signal in a first broadcast channel and a second broadcast channel having a bit rate different from that of the first broadcast channel, Service is common to the first broadcast channel and the second broadcast channel at a corresponding bit rate that is equal to or less than a main service bit rate having a smaller value among a first main service bit rate of the first broadcast channel and a second main service bit rate of the second broadcast channel. Encoding a spare frame for the disaster message; Selectively inserting and padding a first null stream into the preliminary frame to generate a first disaster message signal having the first main service bit rate of the first broadcast channel that is greater than or equal to the corresponding bit rate; And Selectively inserting a second null stream into the preliminary frame and processing the signal, thereby causing a second disaster message signal having the second main service bit rate of the second broadcast channel that is greater than the corresponding bit rate and different from the first main service bit rate; Disaster broadcasting providing method comprising the step of generating. delete The method of claim 1, If the disaster service signal is a video signal, after the encoding, further comprising TS packetizing the encoded disaster service signal based on the identification information, Generating the first disaster message signal Selectively inserting the null stream into the TS packetized disaster service signal; Selectively correcting time information of the null stream-inserted disaster service signal; And A first outer coding process of the selectively corrected disaster service signal to generate a first disaster message signal having the first main service bit rate; Generating the second disaster message signal Inserting the null stream into the TS packetized disaster service signal; Correcting time information of the null stream-inserted disaster service signal; And And a second outer coding process of the corrected disaster service signal to generate a second disaster message signal having the second main service bit rate. The method of claim 3, Each of the first and second outer codes includes an error correction encoding and a convolution interleaving process, and the correcting of the time information may include a program clock reference (PCR) and an OCR (included in the null stream-inserted disaster service signal). A method of providing a disaster broadcast comprising modifying an Object Clock Reference (DTS), a Decoding Time Stamp (DTS), a Composition Time Stamp (CTS), a Presentation Time Stamp (PTS), and a Continuity Counter (Continuity_counter) based on the elapsed time of the null stream insertion. . The method of claim 1, The disaster service signal includes a video signal, an audio signal and a data signal, the bit rate being determined based on the video bit rate, the audio bit rate and the data bit rate, wherein the bit rate of the first main service is the first video main bit rate, the first bit rate. Is determined based on an audio main bit rate and a first data main bit rate, and a bit rate of the second main service is determined based on a second video main bit rate, a second audio main bit rate, and a second data main bit rate, When each of the first and second main bit rates is greater than or equal to the bit rates, Wherein said encoding comprises encoding said video signal, said audio signal and said data signals at said video bit rate, said audio bit rate and said data bit rate, respectively. Generating the first disaster message signal selectively inserts a null stream into each of the encoded signals to generate the video signal, the audio signal and the data signal output at the first main bit rates, respectively. , Generating the second disaster message signal includes selectively inserting a null stream into each of the encoded signals to generate the video signal, the audio signal, and the data signal output at the second main bit rates, respectively. Disaster broadcast delivery method. 6. The method of claim 5, After generating the second disaster message signal, Outputting a first disaster message stream by multiplexing the video signal, the audio signal and the data signal generated at the first main bit rates; Outputting a second disaster message stream by multiplexing the video signal, the audio signal and the data signal generated at the second main bit rates; Multiplexing and outputting the first disaster message stream into a first ensemble transport interface (ETI) signal of a first broadcast channel; And And multiplexing the second disaster message stream into a second ETI (Ensemble Transport Interface) signal of a second broadcast channel and outputting the second disaster message stream. 6. The method of claim 5, The generating of the first and second disaster message signals may be performed in the first and second disaster broadcast multiplexers, respectively. Before generating the first and second disaster message signals, Generating a preliminary frame by multiplexing the encoded video signal, the encoded audio signal, and the encoded data signal in a stream form; Distributing the spare frame to the first and second disaster broadcast multiplexers; And demultiplexing the distributed preliminary frames in each of the first and second disaster broadcast multiplexers to recover the encoded video signal, the encoded audio signal, and the encoded data signal. How to provide a broadcast. The method of claim 1, Before the step of encoding, Receiving information related to the first and second main service bit rates based on first and second fast information channels (FICs) included in the first and second broadcast channels, respectively; ; And Setting the bit rate to a minimum main service bit rate of the first and second main service bit rates; After generating the first and second disaster message signals, Multiplexing the first and second disaster message signals to a specification of first and second broadcast channels having the first and second fast information channels, respectively; And Discontinuing transmission of regular broadcasts provided on the first and second broadcast channels and transmitting multiplexed first and second disaster message signals. The method of claim 1, Before the step of encoding, And reproducing the disaster content stored for each disaster situation and outputting the disaster service signal. delete delete delete delete delete delete delete delete delete delete delete

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