KR101024687B1 - Apparatus and method for data broadcasting services in AT-DMB - Google Patents

Abstract

The present invention relates to an apparatus and method for providing a localized data broadcasting service.

Through the apparatus and method for providing data broadcasting service specific to the region by using the additional transmission capacity secured in AT-DMB (Advanced Terrestrial Digital Multimedia Broadcasting) system, it is necessary to select from among numerous data according to the regional area by the location information and setting of the receiver. Only data can be sorted, stored and played back and provided to the user.

AT-DMB, Advanced Terrestrial Digital Multimedia Broadcasting, Local Broadcasting Service, Location Information

Description

Apparatus and method for data broadcasting services in AT-DMB}

The present invention relates to an apparatus and method for providing a localized data broadcasting service.

The present invention is derived from the research conducted as part of the information and communication standard development support project of the Ministry of Knowledge Economy and the Ministry of Information and Telecommunication Research and Development. [Task management number: 2008-P1-07-07K70, Task name: DMB metadata standard development].

Advanced Terrestrial Digital Multimedia Broadcasting (AT-DMB) can provide more broadcasting services than T-DMB through additionally secured transmission channels. Here, T-DMB is commercialized by adding multimedia broadcasting service including video service to Eureka-147 based digital audio broadcasting system in Europe. AT-DMB is T-DMB. It is a broadcasting system that extends the capacity of transmission data up to 2 times by adding a new hierarchical modulation method based on.

The AT-DMB can provide more various services through the increased transmission capacity while using the same frequency band as the existing T-DMB. In particular, in order to satisfy various requirements of the user, it is necessary to provide various data broadcasting services as well as a video service.

On the other hand, like T-DMB, AT-DMB has a high possibility of providing broadcasting service for each region in which the same content varies in frequency according to regions. Thus, the AT-DMB can provide the same T-DMB broadcasting service through the basic region, and provide data broadcasting service specific to the region through the added enhancement region.

In the case of the T-DMB broadcasting service transmitted to the basic area, the transmission capacity is very small, so that a lot of data cannot be sent at once for data broadcasting. In addition, there is a problem that it takes a long time to send a lot of data with a small transmission capacity. Thus, the additional transmission capacity of AT-DMB, which does not affect the nationwide T-DMB broadcasting service, can send a lot of data at once.

Such data is likely to be primarily local. In addition, since much of the data required by the user is only a small portion, the user does not need to receive and store and reproduce all data contents.

Accordingly, the present invention relates to an apparatus and a method for providing a localized data broadcasting service, and more particularly, to an apparatus and a method for providing a region-specific data broadcasting service using additionally secured transmission capacity.

A system for transmitting a data broadcast service specialized in a region which is one feature of the present invention for achieving the technical problem of the present invention,

An ensemble multiplexing unit for receiving the first main broadcast ensemble transmission interface and the first local broadcast ensemble transmission interface and inserting additional channel information into a second main broadcast ensemble transmission interface and a second local broadcast ensemble transmission interface; And hierarchically modulate the second main broadcast ensemble transmission interface and the second local broadcast ensemble transmission interface, the second main broadcast ensemble transmission interface is transmitted through a first layer, and the second local broadcast ensemble transmission interface is a second layer. It includes a modulator to transmit through.

A system for receiving a data broadcast service specialized in a region which is another feature of the present invention for achieving the technical problem of the present invention,

A demodulator for demodulating the received radio frequency signals and outputting the first and second signals; An ensemble demultiplexer for demultiplexing the first signal and the second signal and outputting the first and second signals; A first stream processor for processing the first stream and outputting the first stream as a main broadcast program; A second stream processor configured to process the second stream and output a signal having the same information as the identifier information to a local broadcasting program in comparison with the received identifier information; And a reproduction unit for reproducing the main broadcast data signal and the local broadcast data signal.

In another aspect of the present invention, there is provided a method for providing a data broadcasting service specialized in a region.

Performing demodulation and demultiplexing on the radio frequency signal received from the transmitter to output the base area ensemble and the enhancement area ensemble; Comparing an identifier information with the enhancement region ensemble composed of a plurality of local broadcasting data signals, and determining whether there is a local broadcasting data signal matching the identifier information; And reproducing and providing a local broadcasting data signal corresponding to the identifier information and a main broadcasting data signal output from the basic region ensemble.

According to the present invention, local broadcast data may be transmitted through a transmission channel additionally secured in an AT-DMB system. In addition, since the AT-DMB receiver can select and provide only the necessary data by the user's location information or the user's setting among the transmitted data, the user can conveniently use only the desired information related to the area in the specific area.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise. In addition, the terms “… unit”, “… unit”, “module”, etc. described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software. have.

Hereinafter, an apparatus and method for providing a data broadcasting service specialized in AT-DMB will be described in detail with reference to the accompanying drawings.

1 is a structural diagram of an AT-DMB transmitter according to an embodiment of the present invention.

As shown in FIG. 1, the AT-DMB transmitter 100 includes a data server 110, an ensemble multiplexer 120, and a modulator 130.

The data server 110 stores data produced for providing a local broadcasting service. The stored data is converted into an ensemble transport interface (ETI) frame and then transmitted to the ensemble multiplexer 120. In this case, the signal transmitted from the data server 110 is referred to as an ETI signal for local broadcasting for convenience of description. Here, the ETI signal refers to a signal including various signals such as a video signal, an audio signal, or a data signal.

Local broadcast ETI signals include local information, such as map information, weather and traffic information, restaurants and hospitals in the area. The data server 110 may be included in the AT-DMB transmitter 100 as shown in FIG. 1 or may exist in a form located outside the transmitter. In addition, a plurality of data servers 110 may be included.

The ensemble multiplexer 120 receives a local broadcasting ETI signal transmitted from the data server 110 and a T-DMB ETI signal (hereinafter, referred to as main broadcasting ETI for convenience of description) that includes content produced by a main broadcasting station. Upon receiving these two ETI signals, the ensemble multiplexer 120 inserts information on an additional channel into a fast information channel (hereinafter referred to as FIC), which is a configuration information of the main broadcast ETI signal, thereby providing an ETI signal of a basic region. Generates.

The AT-DMB receiver first checks the base area ETI signal and determines whether the local broadcast ETI signal is present in the signal transmitted from the transmitter. Therefore, when the local broadcasting ETI signal exists, additional channel information for transmitting the local broadcasting data signal is inserted into the main broadcasting ETI signal.

The ensemble multiplexer 120 processes the FIC information in the local broadcast ETI signal and generates the enhanced region ETI signal. Here, the FIC information processing of the local broadcasting ETI signal will be described by way of example. When there are a plurality of local broadcasting ETI signals to be transmitted due to the presence of a large number of data servers 110, one channel is generated by generating one enhancement region ETI signal. This is to allow many local broadcasting ETI signals to be transmitted.

At this time, in order to distinguish one local broadcasting ETI signal from another local broadcasting ETI signal, the ensemble multiplexer adds identifier information to the front of each data. The identifier information is inserted in a form known to both the transmitter and the receiver. Details of the identifier information insertion are already known and detailed description thereof will be omitted in the exemplary embodiment of the present invention.

The modulator 130 hierarchically modulates two ETI signals (base area ETI signal, enhancement area ETI signal) generated from the ensemble multiplexer 120 to generate an AT-DMB radio frequency signal, and generates the generated signals into the air. send.

As described above, the ensemble of the enhancement region ETI signals transmitted from the AT-DMB transmitter 100 includes various local broadcast ETI signals. Therefore, when the receiver receives, stores, and plays all the ETIs, there is a problem of storage and playback in the receiver, and it takes a lot of time for the user to retrieve the data of the required contents.

Therefore, in the embodiment of the present invention, only the desired data is selected from among a lot of data based on the user's location information or the user's setting for the desired data. The structure of the receiver for selecting and executing data as described above will be described with reference to FIG. 2.

2 is a structural diagram of an AT-DMB receiver according to an embodiment of the present invention.

As shown in FIG. 2, the AT-DMB receiver 200 includes a demodulator 210, an ensemble demultiplexer 220, a basic region ensemble processor 230, an enhancement region ensemble processor 240, and a system controller 250. And a reproducing unit 260.

The demodulator 210 receives the AT-DMB radio frequency signal transmitted through the modulator 130 of the transmitter, performs demodulation, and outputs the basic region ensemble frame and the enhancement region ensemble frame.

The ensemble demultiplexer 220 receives the base region ensemble frame and the enhancement region ensemble frame output from the demodulator 210 and performs demultiplexing to generate the base region stream and the enhancement region stream. At this time, the ensemble demultiplexer 220 checks the FIC information of the main broadcast data signal and determines whether information on an additional channel is inserted.

The base region stream processor 230 (also referred to as a first stream processor) processes the base region stream output from the ensemble demultiplexer 220. That is, the basic region stream is decoded and output to the main broadcast program. The enhancement region stream processor 240 (also referred to as a second stream processor) compares the enhancement region stream output from the ensemble demultiplexer 220 with the identifier information received from the system controller 250 and processes the stream. In this case, the structure of the enhancement region ensemble processing unit 240 will be described with reference to FIG. 3.

3 is a structural diagram of an enhancement region ensemble processing unit according to an embodiment of the present invention.

As shown in FIG. 3, the enhancement region ensemble processing unit 240 according to the embodiment of the present invention includes an identifier information comparator 241 and a data selector 242.

The identifier information comparator 241 compares various local broadcast data and identifier information in the enhancement area ensemble processing unit 240 and checks selection data to be provided to the user. To this end, the enhancement region ensemble output from the ensemble demultiplexer 220 and the identifier information output from the system controller 250 are compared.

If there is an enhancement region ensemble having the same information as the identifier result, the data selector 242 selects the enhancement region ensemble as a local broadcasting program to be executed by the receiver and transmits the enhancement region ensemble to the playback unit 260. The local broadcasting program delivered to the reproduction unit 260 includes a decoded video signal, audio signal, or data signal.

Next, the system control unit 250 of FIG. 2 receives the user's location information or user setting information, generates control information, and outputs the control information to the enhancement area ensemble processing unit 240. Herein, the control information refers to information converted based on location information of the receiver or user setting information previously set by the user. As mentioned in the ensemble multiplexer 120 of FIG. 1, the control information is previously known to both the transmitter and the receiver. It is information in a promised form. The conversion from location information or user setting information to control information is already known, and detailed descriptions thereof will be omitted in the exemplary embodiments of the present invention.

The reproduction unit 260 reproduces the main broadcast program output from the base area ensemble processing unit 230 or the local broadcast program output from the enhancement area ensemble processing unit 240 and provides the same to the user.

A method of providing a data broadcasting service specific to a region in an AT-DMB system including such components will be described with reference to FIG. 4.

4 is a flowchart illustrating a region-specific data broadcasting service according to an exemplary embodiment of the present invention.

As shown in FIG. 4, the AT-DMB transmitter 100 receives a main broadcast ETI signal and a local broadcast ETI signal (S100), and generates a base area ETI signal and an enhancement area ETI signal based on the received signals. (S110). In order to generate each ETI signal, the ensemble multiplexer 120 inserts additional channel information into the FIC information of the main broadcasting ETI signal, inserts identifier information into the FIC information of the local broadcasting ETI signal, and multiple local broadcasting ETI signals. FIC information processing such as the merging of the base area ETI signal and the enhancement area ETI signal are generated.

The modulator 130 hierarchically modulates the base region ETI signal and the enhancement region ETI signal generated from the ensemble multiplexer 120 and transmits the AT-DMB radio frequency signal (S120).

The AT-DMB receiver 200 receives the AT-DMB radio frequency signal, performs demodulation after demodulating the demodulator 210 and the ensemble demultiplexer 220, and demultiplexes the radio frequency signal into a base region stream and an enhancement region. Output to a stream (S130). At this time, in the embodiment of the present invention, it is assumed that the output enhancement region stream is a form in which a plurality of local broadcast ETI signals are merged into one, but are not necessarily limited thereto.

Next, the identifier information comparator 241 of the enhancement region ensemble processing unit 240 compares the enhancement region stream received from the ensemble demultiplexing unit 220 with the identifier information received from the system control unit 250 and identifies the identifier in the enhancement region ensemble. It is determined whether there is a local broadcasting program having the same information as the information (S140). Here, the identifier information generated by the system controller 250 is information generated based on location information of the current receiver or setting information preset by the user.

If there are local broadcast programs having the same information as the identifier information received from the system controller 250 among the plurality of local broadcast programs, the data selector 242 of the enhancement region stream processor 240 selects the corresponding enhancement region stream. In this case, the program is extracted by the local broadcasting program and transmitted to the playback unit 260. Then, the playback unit reproduces the main broadcast program received from the basic region stream processor 230 and the local broadcast program received from the enhancement region stream processor 240 and provides the same to the user (S150). However, if there is no matching identifier information, the playback unit 260 receives and plays only the main broadcast program and provides it to the user (S160).

The embodiments of the present invention described above are not only implemented by the apparatus and method but may be implemented through a program for realizing the function corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded, The embodiments can be easily implemented by those skilled in the art from the description of the embodiments described above.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

1 is a structural diagram of an AT-DMB transmitter according to an embodiment of the present invention.

2 is a structural diagram of an AT-DMB receiver according to an embodiment of the present invention.

3 is a structural diagram of an enhancement region ensemble processing unit according to an embodiment of the present invention.

4 is a flowchart illustrating a region-specific data broadcasting service according to an exemplary embodiment of the present invention.

Claims (11)

In the system for transmitting a data broadcast service specialized in the region, An ensemble multiplexing unit for receiving the first main broadcast ensemble transmission interface and the first local broadcast ensemble transmission interface and inserting additional channel information into a second main broadcast ensemble transmission interface and a second local broadcast ensemble transmission interface; And By hierarchically modulating the second main broadcast ensemble transmission interface and the second local broadcast ensemble transmission interface, the second main broadcast ensemble transmission interface is transmitted through a first layer, and the second local broadcast ensemble transmission interface uses a second layer. Modulator to transmit via Localized data broadcast transmission system comprising a. The method of claim 1, The ensemble multiplexer, Inserting additional channel information for transmitting the local broadcast ensemble transmission interface into the fast information channel of the first main broadcast ensemble transmission interface and outputting the additional channel information to the second main broadcast ensemble transmission interface, And inserting identifier information corresponding to the first local broadcast ensemble transmission interface into the high speed information channel of the first local broadcast ensemble transmission interface and outputting the identifier information corresponding to the first local broadcast ensemble transmission interface to the second local broadcast ensemble transmission interface. The method of claim 1, And the first layer is a base layer, and the second layer is an enhancement layer. In the system for receiving a data broadcast service specialized in the region, A demodulator for demodulating the received radio frequency signals and outputting the first and second signals; An ensemble demultiplexer for demultiplexing the first signal and the second signal and outputting the first and second signals; A first stream processor for processing the first stream and outputting the first stream as a main broadcast program; A second stream processor configured to process the second stream and output a signal having the same information as the identifier information to a local broadcasting program in comparison with the received identifier information; And A reproduction unit for reproducing the main broadcast data signal and the local broadcast data signal Localized data broadcast reception system comprising a. The method of claim 4, wherein A system control unit for generating the identifier information based on the user's location information or preset user setting information to output to the second stream processing unit Localized data broadcast receiving system further comprising. The method of claim 4, wherein The second stream processing unit, An identifier information comparator that receives the second stream and the identifier information and determines whether the same information as the identifier information is included in the second stream; And A data selector for selecting a signal selected from the plurality of local broadcast data signals included in the second stream by using the identifier information comparator as a local broadcast program. Localized data broadcast reception system comprising a. In the method for providing a data broadcasting service specialized in the region, Performing demodulation and demultiplexing on the radio frequency signal received from the transmitter to output the base area ensemble and the enhancement area ensemble; Comparing an identifier information with the enhancement region ensemble composed of a plurality of local broadcasting data signals, and determining whether there is a local broadcasting data signal matching the identifier information; And Reproducing and providing a local broadcasting data signal matching the identifier information and a main broadcasting data signal output from the basic region ensemble; Localized data broadcasting providing method comprising a. The method of claim 7, wherein The outputting of the basic area ensemble and the enhancement area ensemble may include: Demodulating the radio frequency signal to output a base area ensemble transmission interface and an enhancement area ensemble transmission interface; And Demultiplexing the base area ensemble transmission interface and the enhancement area ensemble transmission interface to output the base area ensemble and the enhancement area ensemble. Localized data broadcasting providing method comprising a. The method of claim 8, And the basic region ensemble transmission interface includes channel information transmitting the regional broadcasting data signal. The method of claim 8, And the enhancement region ensemble transmission interface includes a plurality of identifier information for each of the plurality of regional broadcast data signals. The method of claim 7, wherein And the identifier information is generated based on one of user location information or preset user setting information.

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