KR100785951B1 - Method and apparatus for providing duplex contents service in digital multimedia broadcasting system - Google Patents

Abstract

The present invention relates to a two-way content service technology in a digital multimedia broadcasting system. When an arbitrary data broadcast is selected while receiving an arbitrary broadcast signal through a broadcasting station server, the selected data broadcast is selected from the base reception file. If the selected data broadcast is a file other than the basic received file, the data broadcast request signal is transmitted to the wireless Internet, the data broadcast request signal is transmitted from the wireless internet to the broadcasting station server, and the digital multimedia of the requested data broadcast is determined. Transmitting timing information and file information that can be received by a broadcasting system from a broadcasting station server to the wireless Internet, wirelessly transmitting timing information and file information of data broadcasting from a wireless internet to a digital multimedia broadcasting system, and timing information and files of data broadcasting. Synchronize the beams timing information, and file information that is received when the normal reception is characterized in that the selected received data broadcast from the broadcast station server. According to the present invention, the timing information and file information of an arbitrary data broadcast requested from a user by interworking a wireless Internet capable of mobile reception with the DMB are loaded on the carousel information and transmitted to the DMB via the wireless Internet. By watching the data broadcast selected accordingly, there is an effect that the user can easily watch the data broadcast required by the user with the minimum bandwidth.

TDMB, SDMB, WiBro, Carousel

Description

Bidirectional content service device and method in digital multimedia broadcasting system {METHOD AND APPARATUS FOR PROVIDING DUPLEX CONTENTS SERVICE IN DIGITAL MULTIMEDIA BROADCASTING SYSTEM}

1 is a block diagram illustrating an interactive content service device in a digital multimedia broadcasting system according to the present invention;

2 is a flowchart illustrating an interactive content service process in a digital multimedia broadcasting system according to the present invention;

3 is a view illustrating carousel transmission information including a basic reception file and a user request file according to the present embodiment;

<Explanation of symbols for main parts of the drawings>

100: digital multimedia broadcasting system

120: wireless Internet

140: Internet

160: broadcast station server

The present invention relates to a content service technology of a digital multimedia broadcasting system (abbreviated as DMB), and in particular, bidirectional content in a DMB system suitable for minimizing bandwidth waste in a carousel-based file transfer environment. Service apparatus and method.

The DMB refers to a service that has been renamed and used domestically in accordance with the ITU regulations that digital audio broadcasting (DAB) hereinafter includes video, text, etc. in addition to audio.

The DMB is an advanced system that not only provides users with completely digital information but also applies various frequencies in terms of quality and quantity. In addition, DMB can transmit voice programs and data programs at different data rates at the same time, and provides PAD (Program Associated Data) services that include data services in voice programs, and independently of text, graphics, and video. Non Program Associated Data (NPAD) services that provide programs are available. In particular, the NPAD service may be used to provide contents such as train and plane timetables, stock information, weather information, performance information, and news.

Such DMB receivers include PC (PC) card type, home audio type, and automobile type. The DMB receivers are classified into terrestrial broadcasting service and satellite broadcasting service according to the characteristics of the medium.

Broadcasting using satellite, SDMB (Satellite DMB) signals video and audio signals produced by broadcasting stations through the transmitting earth station and signals to the receiving earth station in the distant place by using satellite, a stationary satellite floating in the equator, as a repeater. In this case, a signal is transmitted from the terrestrial digital broadcasting earth station to the satellite for digital broadcasting, and the signal received from the satellite is downstream through the L-band.

In addition, in a broadcast system using terrestrial waves, a digital broadcasting station directly outputs a digital broadcast. Broadcast signals output by these two methods are received by mobile and fixed digital receivers.

Such a DMB system can be broadly classified into an out-of-band (EUREKA) -147 method jointly proposed in Pan-Europe and an in-band (IN-BAND) method proposed by the United States.

The Eureka-147 method is called Terrestrial Digital Multimedia Broadcasting (TDMB), and uses a new frequency band other than the FM band in which analog broadcasting is provided. In addition, the Eureka-147 system has a frequency band of 30 MHz to 3 GHz, that is, Very High Frequency (VHF), Ultra High Frequency (UHF), and L-band (1 to 2 GHz) / S-band; It can operate in the 2 ~ 4GHz) band (satellite broadcasting band), it is possible to broadcast terrestrial broadcasting through the current FM band and TV band and satellite broadcasting through the L / S band. Therefore, it is known to be the best DAB system developed to date because the frequency can be efficiently used through improved reception performance, high speed data transmission and single frequency network configuration due to broadband transmission. Korea is also based on the Eureka-147 digital radio broadcast, adopted as the European terrestrial radio standard.

On the other hand, in the existing satellite or terrestrial DMB system, there is a limitation of one-way service, so it sends a plurality of files repeatedly in a certain order by adopting a 'carousel' method to transmit data to the receiving user. The carousel method means transmitting a collection of files in a cyclic manner when an arbitrary data broadcast is selected, for example, a Broadcast Website Service (BWS) broadcast in TDMB. The DMB receiver can receive the same data.

However, in the conventional DMB service technology, bandwidth is wasted in terms of the DMB receiver receiving broadcast data. In particular, in recent years, there has been a trend to propose a two-way service technology that allows the DMB receiver to request a desired data broadcast to the broadcast station server, but there is a problem that such a bidirectional service between the broadcast station server and the DMB receiver occupies too much bandwidth.

The present invention is to solve the problems of the prior art, by interlocking the DMB with the wireless Internet capable of mobile reception and the timing information and file information of the arbitrary data broadcast requested from the user to the carousel information transmitted to the DMB via the wireless Internet The present invention provides an apparatus and method for interactive content service in a DMB system that enables users to easily view data broadcasts required by a user with minimum bandwidth by allowing them to watch data broadcasts selected according to the timing information and file information. have.

According to an aspect of the present invention for achieving the above object, as a content service device in a digital multimedia broadcasting system, a digital multimedia broadcasting receiver for tuning and outputting a broadcast signal received through an antenna at a corresponding frequency, and data broadcasting of a user A control unit generating a file request signal corresponding to the selection signal and controlling to receive the data broadcast by synchronizing the selected data broadcast with timing information according to the file information corresponding to the request signal; A wireless transmission / reception unit for wirelessly receiving timing information and file information of the data broadcast, and a wireless connection with the wireless transmission / reception unit, and multi-processing the file request signal to the internet, and transmitting the data through the internet. Timing information of the data broadcast provided And receiving a file request signal transmitted from the wireless Internet via the Internet through a multi-access processing of file information to the wireless transmitting / receiving unit, and responding to the file request signal in the digital multimedia broadcasting system. Bidirectional content in a digital multimedia broadcasting system including a broadcasting station server for transmitting receivable timing information and file information to the digital multimedia broadcasting system through the wireless Internet and providing the data broadcasting selected by the user to the digital multimedia broadcasting system. Provide a service device.

According to another aspect for achieving the object of the present invention, a content service method in a digital multimedia broadcasting system that receives data broadcasting from a broadcasting station server and is wirelessly connected to a wireless Internet connected to the broadcasting station server, Determining whether the selected data broadcast is a file other than the default received file, and if the selected data broadcast is a file other than the default received file, if any data broadcast is selected while receiving the broadcast signal, Transmitting a data broadcast request signal, transmitting the data broadcast request signal from the wireless Internet to the broadcast station server, and receiving timing information and file information receivable in the digital multimedia broadcasting system of the requested data broadcast. On the station server Transmitting to the wireless internet, transmitting wirelessly the timing information and the file information of the data broadcast from the wireless internet to the digital multimedia broadcasting system, and if the timing information and the file information of the data broadcasting are normally received, And synchronizing with the received timing information and file information to receive the selected data broadcast from a broadcasting station server.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

Prior to the description of the embodiment, the interactive content service technology according to the present invention is commonly applied to a terrestrial DMB system or a satellite DMB system. For convenience of description, the present invention exemplifies a terrestrial DMB system and a content service process according to the present invention. Let's deal with it. That is, the embodiments described below should not be understood as limiting the features of the present invention but merely as examples, which will become more apparent from the following claims.

1 is a block diagram illustrating a bidirectional content service device in a DMB system according to the present invention. The DMB receiver 102, the key input unit 104, the control unit 106, and the wireless transmitter / receiver unit 100 in the DMB system 100 are illustrated in FIG. 108, the wireless Internet 120, the Internet 140, and the broadcasting station server 160.

As shown, the DMB receiver 102 is a terrestrial broadcast tuner or the like, and serves to output a DMB broadcast signal provided through the VHF antenna 10, for example, a terrestrial broadcast signal in a VHF band at a corresponding frequency. do.

The key input unit 104 is a key signal input means formed on the front panel or the remote controller of the DMB system 100. The key input unit 104 generates a key code corresponding to a user's input action and applies it to the controller 106 to be described later. . For example, the key input unit 104 generates a key code for selecting any data broadcast (broadcast content) that the user wants to watch and provides to the controller 106.

The control unit 106 provides a file request signal to the wireless transmission / reception unit 100 which will be described later in response to the data broadcast selection signal from the key input unit 104, and controls the data broadcasting provided through the wireless transmission / reception unit 100. It serves to deliver the timing information and file information to the DMB receiver 102. The timing information and the file information of the data broadcast, as one of the main features of the present invention, are loaded on the carousel information including the basic reception file provided through the wireless Internet 120 and provided to the controller 106.

The wireless transmission / reception unit 108 wirelessly transmits a file request signal from the control unit 106 to the wireless internet 120, or transmits timing information and file information of data broadcasting provided from the wireless internet 120 to the control unit 106. It serves to convey.

The wireless Internet 120 is connected to the DMB system 100, and transmits signals from the wireless transmission / reception unit 108 of the DMB system 100 through a code base multiple access (CDMA) wireless base station (not shown). Forward to 140. The wireless Internet 120 may be, for example, WiBro (Wireless Broadband Internet).

The Internet 140 is an interworking network adopting TCP / IP as a standard protocol and is a mutual cooperation structure based on a client / server system. The Internet 140 interconnects the wireless Internet 120 and the broadcasting station server 160 to transmit a file request signal from the wireless internet 120 to the broadcasting station server 160 or to broadcast data from the broadcasting station server 160. It serves to deliver the timing information and file information of the wireless Internet (120).

The broadcasting station server 160 is a means for providing a data broadcasting signal to the DMB system 100. When the file request signal is transmitted through the wireless Internet 120 and the Internet 140, timing information that can be received by the DMB system 100 is provided. And file information are first transmitted to the DMB system 100 through the wireless Internet 120, and the data broadcasting signal requested by the user is provided to the DMB system 100.

That is, in the present embodiment, when a request signal (content service request signal) for a specific file is generated through the wireless Internet 120 while receiving a data service in the DMB system 100, the broadcasting station server 160 that receives the request signal (content service request signal) is received. In the present invention, the timing information and the file information that can be received by the DMB system 100 are first transmitted to the DMB system 100 through the wireless Internet 120, and the actual data broadcast is made in accordance with the timing information already transmitted through the wireless Internet 120. It is implemented to be transmitted to the DMB system 100.

Hereinafter, with reference to the above-described configuration, with reference to the flowchart of Figure 2 attached to the interactive content service process in the DMB system according to a preferred embodiment of the present invention will be described in detail.

First, as in step S200, in the middle of receiving a broadcast signal from the DMB system 100, for example, a broadcast signal based on a Broadcast Website Service (BWS) or a BIFS (Binary Format for Scenes) in the case of a terrestrial DMB system, It is determined whether a broadcast, for example, data broadcast by MOT (Multimedia Object Transfer) is selected (S202). In this case, the initial broadcast signal reception is provided in a form in which several files are collected in a carousel manner in both the terrestrial wave and the satellite DMB system. The carousel method transmits files in a cyclic manner in which files are transmitted in a predetermined order, but then the first file is sent again after the last file is transmitted, as illustrated in FIG. 3.

As a result of the determination in step S202, if an arbitrary data broadcast is selected, the controller 106 proceeds to step S204 to determine whether the selected data broadcast is a file other than the basic received file.

As a result of the determination in step S204, if the selected data broadcast is a basic reception file, the process proceeds to step S222 to receive the selected data broadcast, otherwise, if a file other than the default reception file is requested, the control unit 106 is requested. Proceeds to step S206.

In step S206, the controller 106 controls the wireless transmitter / receiver 108 to transmit the corresponding request signal to the wireless Internet 120.

When the request signal is provided to the wireless Internet 120 through the wireless transmitter / receiver 108, the wireless Internet 120 connects to the broadcasting station server 160 connected to the Internet 140 and transmits a transmission command for the request file. (S208) (S210).

In this case, as in step S212, the broadcasting station server 160 determines whether the requested file is the same as a previously received file existing in the broadcasting station server 160, and if so, determines the number of requests of the corresponding file ( S214).

As a result of the determination in step S214, if the number of requests for the same file is greater than or equal to a preset number, the broadcast station server 160 proceeds to step S216 and transmits a non-receipt message to the DMB system 100, but the number of requests has been exceeded. If less than the set number of times, the flow advances to step S218. The reason for searching for the same file and determining the number of requests for the same file is to prevent the broadcasting station server 160 from overloading the load.

In operation S218, the broadcasting station server 160 loads the timing information and the file information of the requested data broadcast on the carousel information including the basic reception file and transmits the information to the DMB system 100 through the wireless Internet 120. For example, as shown in FIG. 3, if there are basic received files A, B, C, and D that are basically transmitted to the carousel, the file X requested by the user is inserted in the middle of the carousel and the DMB system 100 Is sent).

That is, when a transmission command for the request file is transmitted to the broadcasting station server 160 through the wireless Internet 120, the broadcasting transmitting unit (not shown) in the broadcasting station server 160 may request timing information and file information (X) of the request data. ) Is transmitted to the DMB system 100 only once or a certain number of times to avoid duplication.

Meanwhile, in step S220, the controller 106 determines whether the timing information and the file information of the corresponding data broadcast provided from the broadcasting station server 160 are normally received, and when the timing information and the file information of the corresponding data broadcast are normally received. The control unit 106 proceeds to step S222.

In step S222, the controller 106 receives the selected data broadcast from the broadcasting station server 160 in synchronization with the received timing information and file information.

As described above, the present embodiment does not directly request content from the DMB system to the broadcasting station server and provide file information of the corresponding content, but provides only the timing information and file information of the requested content to the DMB system using the wireless Internet. In this way, the bandwidth in the DMB system is reduced.

As mentioned above, although this invention was demonstrated concretely based on the Example, this invention is not limited to this Example, Of course, various changes are possible within the technical idea and the scope of the following claim.

According to the present invention, the timing information and file information of an arbitrary data broadcast requested from a user by interworking a wireless Internet capable of mobile reception with the DMB are loaded on the carousel information and transmitted to the DMB via the wireless Internet. By watching the data broadcast selected accordingly, there is an effect that the user can easily watch the data broadcast required by the user with the minimum bandwidth.

Claims (12)

A content service device in a digital multimedia broadcasting system, A digital multimedia broadcasting receiver for tuning and outputting a broadcast signal received through an antenna at a corresponding frequency; A file request signal corresponding to a selection signal of an arbitrary data broadcast is generated from a broadcast signal through the digital multimedia broadcast receiver, and timing information and file information corresponding to the file request signal are transmitted to the digital multimedia broadcast receiver to provide the data. A control unit which controls to receive the data broadcast by synchronizing broadcast timing information and file information; A wireless transmission / reception unit for wirelessly transmitting the file request signal and transmitting timing information and file information of the data broadcast to the control unit; The wireless transmission / reception unit is wirelessly connected to the wireless transmission / reception unit, and transmits the file request signal to the Internet by multi-access processing, and performs multi-access processing of the timing information and file information of the data broadcast provided through the Internet. Wireless internet transmission, Receives a file request signal transmitted from the wireless Internet through the Internet, and transmits timing information and file information that can be received by the digital multimedia broadcasting system in response to the file request signal to the digital multimedia broadcasting system through the wireless Internet. And providing a selected data broadcast to the digital multimedia broadcasting system. Interactive content service device in a digital multimedia broadcasting system comprising a. The method of claim 1, The file request signal is a two-way content service device in a digital multimedia broadcasting system, characterized in that the content service request signal. The method of claim 1, The timing information and the file information of the data broadcast are included in the carousel information including the basic reception file provided through the wireless Internet and provided to the controller. The method of claim 1, The wireless Internet is a two-way content service device in a digital multimedia broadcasting system, characterized in that the WiBro (WiBro) network. The method of claim 1, And the digital multimedia broadcasting system is a terrestrial digital multimedia broadcasting system. The method of claim 1, The digital multimedia broadcasting system is a satellite digital multimedia broadcasting system, characterized in that the interactive content service device in the digital multimedia broadcasting system. A content service method in a digital multimedia broadcasting system receiving data broadcasting from a broadcasting station server and wirelessly connected to a wireless Internet connected to the broadcasting station server. Determining whether the selected data broadcast is a file other than a basic received file, when a random data broadcast is selected while receiving a broadcast signal through the broadcast station server; Transmitting the data broadcast request signal from the digital multimedia broadcasting system to the wireless Internet if the selected data broadcast is a file other than a basic received file; Transmitting the data broadcast request signal from the wireless Internet to the broadcast station server; Transmitting timing information and file information receivable in the digital multimedia broadcasting system of the requested data broadcast from the broadcasting station server to the wireless Internet; Wirelessly transmitting timing information and file information of the data broadcast from the wireless Internet to the digital multimedia broadcasting system; When the timing information and file information of the data broadcast are normally received by the digital multimedia broadcasting system, synchronizing the received timing information and file information in the digital multimedia broadcasting system to receive the selected data broadcasting from a broadcasting station server. Interactive content service method in a digital multimedia broadcasting system comprising a. The method of claim 7, wherein The method, Determining whether the requested file in the digital multimedia broadcasting system is the same as a previously received file existing in the broadcasting station server; Determining whether the number of requests for the file is equal to or greater than a preset number if the same as the previously received file; Transmitting a non-receipt message from the broadcasting station server to the digital multimedia broadcasting system when the number of requests of the file is equal to or greater than the preset number of times; Transmitting the timing information and the file information of the data broadcast to the digital multimedia broadcasting system through the wireless Internet when the number of request of the file is less than the predetermined number of times. Interactive content service method in a digital multimedia broadcasting system further comprising. The method of claim 7, wherein The timing information and the file information of the data broadcasting are transmitted to the digital multimedia broadcasting system via the wireless Internet in the carousel information including the basic reception file. The method of claim 7, wherein The wireless Internet is a two-way content service method in a digital multimedia broadcasting system, characterized in that the WiBro network. The method of claim 7, wherein The digital multimedia broadcasting system is a terrestrial digital multimedia broadcasting system. The method of claim 7, wherein And the digital multimedia broadcasting system is a satellite digital multimedia broadcasting system.

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