KR20050106269A - Method for providing data service in digital broadcasting system - Google Patents

Abstract

The present invention relates to a data service method in a digital broadcasting system, comprising: transmitting information related to at least one or more applications to an AIT to an arbitrary viewer, extracting application-related information from the AIT transmitted when the viewer requests the viewer, and And receiving a selected application from a broadcast station if any application is selected. According to the present invention, since it is possible to check what kind of application is being serviced even without receiving an actual application, it is possible to receive an application that matches the viewer's preference. As a result, there is an effect of increasing viewer satisfaction in a digital broadcasting environment.

Description

Data service method in digital broadcasting system {METHOD FOR PROVIDING DATA SERVICE IN DIGITAL BROADCASTING SYSTEM}

The present invention relates to a data service technology in a digital broadcasting system, and more particularly, to a data service method in a digital broadcasting system capable of confirming application related information without receiving an actual application and selectively receiving only an application of a set genre. will be.

Recently, with the development of digital technologies such as digital image compression and digital modulation / demodulation, the standardization and commercialization of digital television broadcasting is rapidly progressing. Also, in the conventional terrestrial, satellite, and cable broadcasting, MPEG (Moving Picture Experts Group) Based on this trend, digitalization is on the rise.

In digital broadcasting, a plurality of broadcast programs encoded on the basis of MPEG are multiplexed and transmitted in the form of a transport stream, which is received by a digital broadcast receiver such as a set-top box (STB) installed on the receiving side. The multiple broadcast programs included in the transport stream are demultiplexed.

Therefore, only one broadcast program desired by a user can be selected. Also, in a digital broadcast receiver such as a set-top box, a general television after restoring the selected broadcast program to an original audio and video signal using an MPEG decoder included in the receiver. It transmits to A / V output device such as

In addition, a large-capacity hard disk (HDD) is additionally provided in a digital broadcast receiver such as a set-top box, and a program stored in the hard disk is stored on a hard disk after being transmitted to an A / V output device such as a television. Digital broadcasting system has been developed and released with the addition of a digital broadcast recording / playback function, for example, a 'PVR (Personal Video Recorder)' function, which reproduces and outputs a broadcast program recorded on a disk. Is as follows.

FIG. 1 is a block diagram illustrating a digital broadcasting system equipped with such a PVR function. A demultiplexer 100, a parser 102, a buffer memory 104, a storage unit 106, and an MPEG decoder ( 108, a control unit 110, a key input unit 112, and the like.

In the demultiplexer 100, a plurality of digital broadcast programs selectively output a transport stream of any one broadcast program among transport streams of a multiplexed multi-program.

The parser 102 separately outputs 188-byte transport packets constituting the transport stream of any one of the broadcast programs described above into video and audio data and navigation data.

In the buffer memory 104, video and audio data output through the above-described parser 102 are temporarily stored, and then recorded and stored in the storage unit 106, for example, a hard disk, in units of a predetermined recording size.

The MPEG decoder 108 decodes the video and audio data temporarily stored in the buffer memory 104 into original video and audio data, and outputs them as video and audio through the screens and speakers of a connected general television.

The key input unit 112 is a means for generating a predetermined key signal according to a user's input action, and performs a function of generating a key signal for performing various modes of the digital TV as well as an electronic program guide (EPG) key input signal. .

The controller 110 performs an overall function of controlling the demultiplexer 100, the parser 102, etc. in response to the key input signal of the key input unit 112. The controller 110 records the received digital broadcast program in the storage unit 106. Control or video and audio data temporarily stored in the buffer memory 104 are output through the TV screen and the speaker, respectively.

On the other hand, the digital broadcasting system configured as described above receives data broadcasting information related to the image information in addition to the image information. That is, in order to confirm the contents when executing an application received through digital broadcasting, the user may select broadcast after providing the broadcasting information of the received application as text.

However, according to the conventional digital broadcasting system, since the contents of the data broadcasting information can be confirmed only after receiving the application, that is, the application information can be confirmed only when the application of the broadcasting program is premised, the wider broadcasting service can be provided to the viewer. There is a drawback that cannot be provided.

For example, since there is no way for a viewer to confirm in advance which genre and what kind of application will be received, there are bound to be various restrictions on viewing preference or ease of use.

The present invention has been proposed to overcome the above-mentioned limitations of the prior art, and includes application-related information, for example, a genre, in an AIT descriptor included in the program specific information (PSI) of the MPEG-2 format. And a data service method in a digital broadcasting system capable of confirming application information in advance without receiving an actual application by additionally transmitting field information indicating a type.

Another object of the present invention is to provide a data service method in a digital broadcasting system in which, when a viewer sets an application genre, the application field information is searched to selectively receive only the application of the set genre.

According to a preferred embodiment of the present invention for achieving this object, a data service method in a digital broadcasting system, comprising: transmitting information related to at least one or more applications to an AIT to an arbitrary viewer; And extracting the application related information from the AIT and displaying the information related to the viewer, and receiving a selected application from a broadcasting station when an arbitrary application is selected.

According to a preferred embodiment for achieving another object of the present invention, a data service method in a digital broadcasting system that transmits information related to at least one or more applications to an AIT to any viewer, the PSI received in any application Analyzing the PMT (Program Map Table) in the received PSI, analyzing the AIT in the analyzed PMT, extracting application-related information from the analyzed AIT, and retrieving application field information; Determining whether the application-related information set by the viewer exists in the searched application field information; determining whether the time set by the viewer has arrived when the set application-related information exists; and receiving the corresponding application when the set time arrives. And display It provides a method of data service in a digital broadcasting system, comprising.

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

Prior to the description, embodiments according to the present invention may be described with reference to the configuration of FIG. 1 described above, and the description of the same reference numerals will be omitted to avoid duplication of description.

Hereinafter, the data service process in the digital broadcasting system according to the preferred embodiment of the present invention together with the configuration of FIG. 1 will be described in detail with reference to FIGS. 2 and 3.

First, FIG. 2 illustrates a process of receiving and displaying application related information, for example, information related to the genre and type of an application, before receiving an actual application as an embodiment of the present invention.

This process is based on the premise that the broadcasting station transmits information related to at least one or more applications, for example, the genre and type of the application, to an arbitrary viewer in addition to the AIT.

Referring to FIG. 2, in step S200, the controller 110 receives a PSI in any application from a broadcasting station and proceeds to step S202.

In step S202, the controller 110 analyzes the PMT in the received PSI, and analyzes the AIT in the analyzed PMT.

In operation S204, application related information is extracted from the analyzed AIT. More specifically, information related to the genre and type of the application is extracted using "reserved_future_use bits" in an application descriptor of the AIT.

However, since the "reserved_future_use bits" is usually limited to 5 bits, it is preferable to extend the application descriptor or add a new application descriptor in order to transmit a larger amount of application related information in addition to the genre and type information.

Thereafter, in step S206, it is determined whether a screen display output of application-related information is requested from the viewer. That is, it is determined whether a key signal for displaying an application genre or type on the TV screen is input through the key input unit 112.

As a result of the determination in step S206, when the viewer's request signal is input, the controller 110 proceeds to step S208 and displays the extracted application related information on the TV screen.

In this case, if any information among application-related information displayed on the TV screen is selected by the viewer, the process further includes receiving a corresponding application corresponding to the selected application information from the broadcasting station.

That is, the data service method in the digital broadcasting system according to an embodiment of the present invention transmits additional information, such as the genre and type of the corresponding application, to the viewer in advance before receiving the actual application, thereby preventing application reception that matches the viewer's preference. It is implemented to be possible.

3 is another embodiment of the present invention, an additional function that may be generated by receiving application-related information in advance, for example, search for application-related information set according to viewer preferences and automatically receive the corresponding application at a scheduled time. 2, the information related to at least one or more applications is added to the AIT and transmitted to an arbitrary viewer.

First, in step S300, the PSI is received by an application, and the flow proceeds to step S302.

In step S302, the controller 110 analyzes the PMT in the received PSI and analyzes the AIT in the analyzed PMT.

In step S304 and step S306, the application-related information is extracted from the analyzed AIT, and then the application field information is retrieved, and the process proceeds to step S308, where the application-related information set by the viewer exists. Determine.

If the application-related information set by the viewer does not exist, the controller 110 proceeds to step S310 and controls to display the extracted application-related information, that is, the type or genre information of the application on the TV screen.

If there is application-related information set by the viewer, the controller 110 proceeds to step S312 and S314 to determine whether a time for displaying application-related information is set for a reservation and if the time is set, the set time is set. Determine if you are coming.

As a result of the determination in step S314, when the set time arrives, the controller 110 proceeds to step S316 and step S318 to receive the corresponding application and to display the received application on the TV screen.

That is, the present embodiment takes advantage of the fact that the application-related information can be received in advance before the actual application is received. The application information and the alarm information are set in advance according to the viewer's preference, and the application required in the desired time period is automatically displayed on the TV screen. To display.

According to the present invention, since it is possible to check what kind of application is being serviced even without receiving an actual application, it is possible to receive an application that matches the viewer's preference. As a result, there is an effect of increasing viewer satisfaction in a digital broadcasting environment.

As mentioned above, although this invention was concretely demonstrated based on the Example, this invention is not limited to this Example, Of course, various changes are possible within the range which does not deviate from the summary.

1 is a block diagram illustrating a typical digital broadcasting system;

2 is a flowchart of a data service process in a digital broadcasting system according to an embodiment of the present invention;

3 is a flowchart of a data service process in a digital broadcasting system according to another embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: demultiplexer 102: parser

104: buffer memory 106: storage unit

108: MPEG decoder 110: control unit

112: key input unit

Claims (10)

As a data service method in a digital broadcasting system, Adding information related to at least one or more applications to the AIT and sending it to any viewer; Extracting application related information from the transmitted AIT and displaying it to the viewer when a viewer requests the request; If any application is selected, receiving the selected application from a broadcasting station Data service method in a digital broadcasting system comprising a. The method of claim 1, The method is Receiving PSI in any application, Analyzing a PMT in the received PSI; Analyzing the AIT in the analyzed PMT; Extracting and displaying application-related information from the analyzed AIT Data service method in a digital broadcasting system further comprising. The method of claim 1, And the application related information is information about a genre and a type of the corresponding application. The method of claim 1, And the AIT includes at least 5 bits of application descriptors. The method of claim 4, wherein And the application descriptor comprises at least one descriptor. A data service method in a digital broadcasting system that transmits information related to at least one or more applications to an AIT to an arbitrary viewer. Receiving PSI in any application, Analyzing a PMT in the received PSI; Analyzing the AIT in the analyzed PMT; Extracting application-related information from the analyzed AIT and retrieving application field information; Determining whether the application related information set by the viewer exists in the searched application field information; Determining whether the time set by the viewer has arrived when the set application-related information exists; Receiving and displaying the corresponding application when the set time arrives Data service method in a digital broadcasting system comprising a. The method of claim 6, The method is If the application-related information set by the viewer does not exist in the application field information, displaying the extracted application-related information to the outside. The method of claim 6, And the application related information is information about a genre and a type of the corresponding application. The method of claim 6, And the AIT includes at least 5 bits of application descriptors. The method of claim 9, And the application descriptor comprises at least one descriptor.