KR100751639B1 - Method of handling additional service selectively in Digital Multimedia Broadcasting - Google Patents

Abstract

The present invention relates to a selective additional service processing method in digital multimedia broadcasting, and a user can set his or her desired item among data service items in a DMB receiver capable of receiving digital multimedia broadcasting. Only the information related to the data service item set by the user is stored and maintained. At this time, the data service items may be classified as information that can be designated by the DSCTy (Data Service Component Type) field of the DMB standard. In addition, when new data is received when the memory space of the DMB receiver is full, the user may directly specify the priority of data to be deleted from the memory.

According to the present invention, it is possible to selectively process data service information while keeping all the obligations of receiving a data service that the DMB receiver must fulfill, thereby enabling the memory space of the DMB receiver to be used more efficiently. Accordingly, the convenience of use of the DMB receiver may be increased, and the quality of the DMB receiver may be improved.

DMB, Receiver, DSCTy, Data Service, Memory

Description

Selective additional service processing method in digital multimedia broadcasting {Method of handling additional service selectively in Digital Multimedia Broadcasting}

1 shows a structure of a DMB transmission frame,

2 is a flow chart of a preferred embodiment according to the present invention,

3 is an embodiment of a process of setting a data service item by a user;

4 is an example of a screen for selecting a data service item;

5 is a structure of "Extension 2 of FIG type 0" in the FIC of the DMB standard;

6 shows the contents of Data Service Component Type (DSCTy);

7 is an example of a screen that is classified and output by data service items;

8 is an example of a process of setting priorities of data service items for memory management.

* Explanation of symbols for main parts of the drawings

11: DMB station 12: DMB receiver

13: DMB Transport Stream 40: DMB Receiver Screen

55,56: DSCTy field

The present invention relates to a method of processing an optional additional service in digital multimedia broadcasting. In particular, among the various additional services provided through digital multimedia broadcasting (DMB), a data service item desired by a user is set in the DMB receiver, and the DMB receiver The present invention relates to a method of selectively serving only data service items set by a user.

The Digital Multimedia Broadcasting (DMB) standard is a standard for mobile reception of multimedia. The European Digital Audio Broadcasting (DAB) standard, which is the basis of this standard, is designed to digitize existing analog radio broadcasts while simultaneously transmitting and receiving various types of broadcasts. Looking at the main types of broadcasting, it is divided into audio broadcasting and other data broadcasting.

The DMB standard enables video broadcasting by transmitting MPEG-4 data to a data broadcasting standard within the DAB standard. In addition, since the DMB standard can transmit other types of data in addition to MPEG-4 data, the DMB standard can support multimedia broadcasting capable of mobile reception. This makes it possible to derive not only the DMB receiver itself but also many applications using it. An example is a combination of a cellphone and a DMB receiver.

The terrestrial DMB capable of mobile reception is available in three blocks (Ensemble: physical frequency TV ch 12 (6MHz) and one channel of VHF-TV (6MHz) in the frequency band of 174 ~ 216MHz (42MHz: TV ch 7 ~ 13). 6 channels can be secured, and CD-quality sound per block is guaranteed.

The frequency band to be allocated to DMB is gradually increasing. Currently, three ensembles are carried out on VHF 12 channels, and 21 ensembles are being promoted on seven channels. In addition, when all broadcasts are switched from analog broadcasts to digital broadcasts, the frequency band allocated to the DMB will further increase. Each ensemble has subchannels of different kinds. This service is divided into a TV service and a radio service.

On the other hand, the DMB receiver must receive and provide various data services corresponding to additional services in addition to services (TV, Radio) transmitted from broadcasting stations.

At this time, there are many types and types of data services to be loaded in a large number of ensembles (Ensemble), and the type and number of data to be received and stored by the DMB receiver are very large. In addition, since the data service includes both text and image formats, a method of securing sufficient memory space and operating efficiently must be indispensable.

In addition, when the memory capacity for the data service is full, when new data service information is received, some of the data service information previously received and stored in the memory must be deleted. In this case, among the various types of data service information, data service information that a user prefers needs to be stored first.

In addition, since there are too many types and numbers of lists to be displayed to the user, and the types of data services must be displayed, the displayable space is large. In particular, since DMB is a main target of mobile devices capable of mobile reception, the problem of narrow display space may be more highlighted.

Therefore, there is a need for DMB receivers (particularly portable mobile terminals) to meet all of these requirements and to more efficiently store and display a wide variety of data.

Accordingly, the present invention has been made to meet the above needs, and can selectively provide only data services desired by the user among various additional services provided through digital multimedia broadcasting (DMB), so as to display resources and displays of the DMB receiver. The goal is to provide a way to make the screen more efficient.

In order to achieve the above object, the optional additional service processing method in the digital multimedia broadcasting according to the present invention, the step of allowing the user to set the desired data service items from among the data service items in the DMB receiver; Receiving, by the DMB receiver, information about each data service item; Storing, by the DMB receiver, only information related to the set data service item among the received information; And classifying and displaying the stored information for each data service item.

The data service item is composed of a data service item that can be designated by a DSCTy (Data Service Component Type) field among the corresponding service component description items belonging to the service field of "Extension 2 of FIG type 0" among DMB signals. Can be.

At this time, the DMB receiver may be configured to compare the DSCTy value of the currently received DMB signal with the data service item set by the user to determine whether to store information related to the data service item.

The DMB receiver allows a user to set priorities for each data service item, and if information stored in a memory should be automatically deleted, the DMB receiver may first delete information related to the data service item according to the set priority. Can be configured.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 1, the DMB transport stream 13 transmitted by the DMB broadcasting station 11 is received by the user's DMB receiver 12, and the DMB receiver 12 analyzes the DMB transport stream 13 to perform video. ), Audio and various types of broadcast data are extracted and output.

To briefly describe the DMB specification, the DMB transmission frame (13) consists of a synchronization channel (13-1), a fast information channel (FIC, 13-2), and a main service channel (MSC, 13-3). .

In the structure of the DMB transmission frame 13, the synchronization channel 13-1 is a channel for transmitting information for decoding on a digital communication, and the MSC 13-3 is a channel through which data to be actually broadcast is transmitted. . That is, video, audio, and various types of broadcast data are transmitted through the MSC 13-3 during digital multimedia broadcasting, and the data must be transmitted without error in the MSC 13-3. Error correction data is sent together. The FIC 13-2 transmits information necessary to determine which channel in the MSC 13-3 is transmitted through the actual broadcast data. In this channel, error correction data other than the CRC is not transmitted because it is intended for fast information transfer.

An embodiment of the present invention will be described with reference to FIG. 2.

First, the user can select and set a desired data service item in the DMB receiver 12 (S21).

An embodiment of performing step S21 will be described with reference to FIG. 3. When a user selects a menu for designating a type of data service from various user interface menus provided in the DMB receiver 12 (S21-2). 1), the DMB receiver 12 displays the data service item for each type on the screen of the DMB receiver 12 (S21-2) and processes the user to select one or more desired items among the displayed data service items. (S21-3). When the user inputs the setting key, the corresponding data service item selected by the user in step S21-3 is stored as the user's favorite item, and the procedure is terminated (S21-4). End (S21-5).

In step S21-3, allowing the user to select a desired data service item may be configured through a process of selecting and checking a corresponding data service item as shown in FIG. 4. 4 shows an example in which a TMC (traffic information) item is checked.

2 again, after the user selects and sets the desired data service item through step S21, when the DMB transport stream is received by the DMB receiver 12 (S22), the DMB receiver 12 receives the received DMB. The service stream is analyzed to extract data service information for various data service items (S23).

The DMB receiver 12 stores, in memory, information about the data service item set in step S21 of the extracted data service item information, and discards other information related to the data service item without storing it (S24). .

The DMB receiver 12 classifies the data service information stored in the memory according to the type of the user and displays the data service information on the screen (S25). That is, when the user requests a list of the received data services, the list of the DMB receiver 12 can be efficiently used by displaying the list according to the type according to the classified 'DSCTy' value.

Now, the types of data service items that can be set by the user in step S21 and the determination of the data service items in step S24 will be described in more detail.

FIG. 5 shows FIG 0/2 (Extention 2 of FIG type 0) as a structure of a 'service organization field' of 'EN 300 401 v1.3.3.DAB' in the DMB standard. FIG 0/2 (Extension 2 of FIG type 0) defines a 'basic service organization', and all service descriptions applied to each service have one field (eg, service k, 51).

The service fields Service k and 51 again include various fields, among which each service component description included in the service field 51 is included. The service component description (eg, 52) is divided into a 2-bit TMId (Transport Mechanism Identifier) 53 and another 14-bit region 54. When the TMId 53 is '01' or '10', data service DSCTy (Data Service Component Type, 55,56) which is used to classify

At this time, the DSCTy (55, 56) is a 6-bit field, as shown in Figure 6, when the DSCTy '000001' indicates' Traffic Message Channel (TMC) ',' 000010 '' Emergency Warning Systems' (EWS) ',' 000011 'for' Interactive Text Transmission System (ITTS) ',' 000100 'for' Paging ',' 000101 'for' Transparent Data Channel (TDC) ), '111011' indicates 'Embedeed IP packets', '111100' indicates 'Multimedia Object Trans (MOT)', and '111101' indicates 'Proprietary service'. In the case of '111110' or '111111', there is no current type specified in DSCTy.

That is, the type of data service item that can be designated by the user in step S21 may be a data service item that can be designated by the DSCTy field.

In the example of the DMB receiver screen shown in FIG. 4, TMC (traffic information), EWS, ITTS, Paging, TDC, etc. are displayed as data service items that can be distinguished by the DSCTy field, and the user checks the corresponding data service items. You can select the data service item by checking the box. 4 shows a state in which a TMC item is selected.

In addition, in step S24, the DMB receiver 12 performs DSCTy (Data Service Component) among the corresponding service component description items belonging to the service field of "Extension 2 of FIG type 0" among the information of the received DMB transport stream. Type) value. Only when the DSCTy field indicates a data service item designated by the user, information of the data service item is stored in the memory and maintained. In the embodiment shown in FIG. 4, the DMB receiver 12 will store and maintain only data service information relating to TMC items in memory.

FIG. 7 illustrates an example in which information about a TMC item selected by a user is displayed on a screen of a DMB receiver. In this case, if each data service item is classified and displayed by type, the display screen may be used more efficiently.

In the example shown in FIG. 7, the data service item not set by the user other than the TMC item is preferably displayed to be distinguished from the data service item set by the user. For example, the data service item selected by the user (for example, 'TMC') is displayed brightly, and other data service items that are not displayed are blurred.

Meanwhile, when the memory of the DMB receiver 12 is full, some of the data service information stored in the memory must be deleted. In this case, the information to be deleted from the memory may be configured to be differentiated for each data service item according to a user's preference.

As one example, the DMB receiver 12 allows to set priorities for each data service item. If data service information is to be automatically deleted, the information of the corresponding data service item is first deleted according to the set priority.

Referring to FIG. 8, a user designates priorities for each data service item through a corresponding menu provided in the DMB receiver 12 (S81). When the memory is full (S82), the DMB receiver 12 inquires the priority information set in step S81 (S83), and deletes data service information stored in the memory according to the priority (S84).

For example, if the user sets the TMC, EWS, and TDC items to the desired data service item, and the priority is set to TMC, TDC, and EWS in order of high preference, the DMB receiver may enter the EWS item if the memory is full. Information is first deleted from memory.

That is, the priority for data deletion is inversely proportional to the user's data service preference. One example for setting the priority is to set the order of the data service items displayed on the screen of the DMB receiver 12, and to sequentially increase the order of priority from the data service item displayed at the top down. It is. At this time, the user preferences are sequentially lowered downward from the data service item displayed at the top.

However, it is a matter of course that the priority setting for each data service item for data deletion may be made through various methods for convenience of use.

The present invention is not limited to the above-described embodiments and can be variously modified and implemented by those skilled in the art without departing from the technical spirit of the present invention.

According to the present invention, it is possible to selectively process data service information while keeping all the obligations of receiving a data service that the DMB receiver must fulfill, thereby enabling the memory space of the DMB receiver to be used more efficiently. Accordingly, the convenience of use of the DMB receiver may be increased, and the quality of the DMB receiver may be improved.

Claims (5)

In the Digital Multimedia Broadcasting (DMB) receiver, the Data Service Component Type (DSCTy) field can be specified among the corresponding service component description items belonging to the "Extension 2 of FIG type 0" service field of the DMB signal. Setting a data service item desired by a user among data service items; Receiving, by the DMB receiver, information about each data service item; Storing, by the DMB receiver, only information related to the set data service item among the received information using the DSCTy field; And And the DMB receiver classifying and displaying the stored information for each data service item. delete The method of claim 1, The DMB receiver is configured to compare the DSCTy value of the currently received DMB signal with the data service item set by the user and determine whether to store information related to the data service item. Optional additional service processing method. The method according to claim 1 or 3, The DMB receiver allowing a user to set priorities for each data service item; And If the DMB receiver needs to delete the information previously stored in the memory in order to store the information related to the data service item set by the user, first deleting the information related to the data service item according to the set priority; Optional additional service processing method for digital multimedia broadcasting further comprising. The method of claim 4, wherein And the setting of the priority is made by selecting the display order of each data service item displayed on the screen of the DMB receiver.

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