KR100755845B1 - Data structure and method for EPG service and mobile-type broadcasting receiver - Google Patents

Abstract

The present invention relates to a mobile broadcast receiver and a program guide information service method in the mobile broadcast receiver. Particularly, in the present invention, when a plurality of formats are set in a DMB service transmitted from a broadcasting station, the plurality of formats information can be displayed in EPG. By doing so, both the receiver producer and the user can obtain accurate information about the service.

DMB, EPG, XML, Format

Description

Program structure and method for EPG service and mobile-type broadcasting receiver

1 is a diagram showing an embodiment of a structure of a service information ServiceInformation element of a general EPG service

2 is a diagram illustrating an example of an XML schema structure corresponding to a format attribute in a conventional service element

3 illustrates an example of an XML schema structure corresponding to a format attribute in a service element according to the present invention.

4 is a schematic diagram of a mobile broadcast receiver for an EPG service according to the present invention;

Explanation of symbols for main parts of the drawings

401 tuner 402 demodulator

403: DAB Decoder 404: Memory

405: First audio decoder 406: RS decoder

407 demux 408 second audio decoder

409: video decoder 410: OD decoder

411: BIFS decoder 412: MOT decoder

413: XML Parser 414: EPG Engine

415: EPG Browser

The present invention relates to a mobile broadcast receiver, and more particularly, to a method for providing program guide information and a mobile broadcast receiver.

Digital Multimedia Broadcasting (DMB) among mobile broadcasts is based on Eureka-147 Digital Audio Broadcasting (DAB), which has been adopted as the European terrestrial radio standard. The DAB / DMB may provide video, audio, and data services. That is, the Eureka-147 was created for digital audio broadcasting (DAB), but is also used as a ground-based DMB technology that serves a small screen size video using a narrow frequency bandwidth of 2 MHz.

Data services that can be supported by the DAB / DMB include a broadcast web site (BWS), a slide show, a dynamic label segment (DLS), a transport protocol expert group (TPEG), and an electronic program guide (EPG).

That is, the DMB also provides an EPG that allows a user to easily access desired broadcast contents. The user can obtain information about a broadcast program such as a program name, a broadcast time, a genre, and a program summary through the EPG. Furthermore, the user can be provided with a program search and a viewing guide information to select a desired program. . In addition, you can get information about the channel, select and move the channel you want, and schedule recording. That is, the EPG information includes channel and program information, time information, and program summary information. When the EPG information is displayed on the screen, the EPG information is displayed in order of channel and time.

In this case, the EPG is classified into an extensible markup language (XML) type EPG and a binary type EPG. Each EPG has a difference between XML and binary, and the information contained therein is the same.

The EPG is largely composed of an EPG element containing information related to program scheduling and a service information element containing broadcast station and channel information. That is, the EPG is represented by service information and program information. The service information has a serviceInformation element as a top element, and the program information has an epg element as a top element.

1 is a diagram illustrating a hierarchical structure of a serviceInformation element of the XML EPG, and is composed of one or more ensemble elements. Each ensemble element may have several service elements. Here, the ensemble element refers to a signal transmitted at one physical frequency, and a service element has the meaning of an individual channel of a broadcast. In other words, each element of the service information, ensemble, and service has attributes indicating subordinate elements and their characteristics and has a hierarchical structure in order of service information, ensemble, and service.

In FIG. 1, an ensemble element stores frequency information of an ensemble in a frequency element, and short, medium, and long names of the ensemble are stored in a serviceNameGroup element. The description and logo for the ensemble are stored in the MediaDescription element, and the CA (Conditional Access), keywords and link information are stored in the corresponding element.

Like the ensemble element, the service element includes a serviceNameGroup, mediaDescription, CA, keywords, and link elements.In addition, the service ID (serviceID), genre of the service, and language of the service (epgLanguage) can be uniquely identified. It stores information about. The serviceID element of the service element includes an attribute called a unique number (id) and a type.

The XML EPG data having the structure as shown in FIG. 1 is binary encoded as shown in FIG. 2 and transmitted through a multimedia object transfer (MOT) protocol.

Figure 2 shows an example of an XML schema for the format of the service attributes in the XML EPG.

That is, in FIG. 2, the attribute name in the service element is 'format', and the default value of the attribute called format is 'audio'. The data type of the format attribute is represented by NMTOKEN.

The enumeration values of the format attribute include "audio", "DLS", "MOTSlideshow", "MOTBWS", "TPEG", "DGPS", and "proprietary". That is, since the format attribute of FIG. 2 uses a data type of 'NMTOKEN' and a facet of 'enumeration', when the EPG is parsed, only one of the candidate values described above is selected and displayed on the display device. can do.

Therefore, even if a plurality of service formats are set and transmitted, only one format attribute that can be displayed on the display device can be displayed. For example, the format characteristics of the actual broadcast service may be "audio" and provide "DLS", and may be "audio" and "MOTBWS", but the format information displayed on the actual display device is "audio". Only one of "DLS" or "MOTBWS" is selected.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a method and apparatus for configuring an EPG to enable the setting of a plurality of service formats and the display of all set formats.

In order to achieve the above object, the program guide service method of a mobile broadcast system according to the present invention, the program guide information service method of a mobile broadcast system for transmitting and receiving at least one format is set, the broadcast service, Constructing and transmitting a format attribute of program guide information to display all format information set in a character string; And parsing a format attribute of the transmitted program guide information and displaying all of the format information set in the broadcast service as a corresponding string, wherein the program guide information includes a restriction element having a basic data type set to 'string'; And at least one service element configured with a pattern element facet that lists strings of formats to be displayed as a basic data type of the restriction element as a pattern value.

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According to an aspect of the present invention, a mobile broadcast receiver includes: a received signal processor configured to tune and demodulate a broadcast service of a specific channel; A decoder for separating and filing program guide information including a format attribute of a broadcast service demodulated by the received signal processor; And an EPG processing unit for parsing the format attribute of the program guide information file output from the decoder and displaying all of the format information set in the broadcast service as a corresponding character string.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments taken in conjunction with the accompanying drawings.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention that can specifically realize the above object will be described. At this time, the configuration and operation of the present invention shown in the drawings and described by it will be described as at least one embodiment, by which the technical spirit of the present invention and its core configuration and operation is not limited.

According to the present invention, when a plurality of formats are set and transmitted to a service actually broadcasted, all set format information can be displayed on an EPG.

For example, the format characteristics of the actual broadcast service are "audio" and "DLS" provides both "audio" and "DLS" on the EPG, while "audio" and "MOTBWS" provide "audio" and " MOTBWS "is displayed.

3 illustrates an example of an XML schema in which a service format is set in the XML EPG according to the present invention. The XML schema is a language used to define structures and to restrict new elements and attributes.

3, the attribute name of the service element is 'format' and the default value is 'audio'. In this case, the XML schema may be defined by limiting the range of values that a new simple data type (smpleType) may have. In addition, the restriction element is used to define a new type through the restriction, and a base attribute is defined to specify a base data type.

In FIG. 3, the basic data type of the restriction element is defined as 'string'.

That is, in XML schema, a type having a range of values can be created by using a restriction element for a simple data type. Use facets to limit the range of values a new type can have. The facet refers to defining a range of values from one viewpoint. In other words, it defines a pattern. For example, in a string type, the length of a string or a pattern of a string is defined, and then the facet is used to make the data available only within a defined range of values.

Thus, in FIG. 3, the attribute 'format' (attribute name = "format") specifies the base data type of the restriction element as string (restriction base = "string"), and uses the pattern element as a facet. Lists the format information that can be displayed.

An example of a string that can be represented by the pattern element value is "pattern value =" (-audio)? (-DLS)? (-MOTSlideshow)? (-MOTBWS)? (-TPEG)? (-DGPS)? ( -proprietary)? "

Here,? Indicates that the preceding string may or may not be displayed. That is, if a format is set for the service to be transmitted, a string corresponding to the format is displayed.

For example, if the format characteristic of the actual broadcast service is "audio" and provides "DLS", (-audio) (-DLS) among the strings of the pattern element value is EPG information about the format of the service on the screen. Will be displayed as.

As described above, the present invention has no limitation in representing a service having a plurality of formats as an EPG.

4 is a block diagram showing an embodiment of a mobile broadcast receiver according to the present invention. The DMB tuner 401, the demodulator 402, the DAB decoder 403, the memory 404, and the first audio decoder ( 405, Reed Solomon (RS) decoder 406, MPEG2 Demux 407, second audio decoder 408, Video Decoder 409, Object Descriptor (OD) Decoder 410, and BIFS ( Binary Format for Scenes) decoder 411 is configured. The RS decoder 406, the MPEG2 demux 407, the second audio decoder 408, the video decoder 409, the OD decoder 410, and the BIFS decoder 411 may also be referred to as a DMB decoder. It is also configured to include a MOT decoder 412, XML parser 413, EPG engine 414, and EPG browser 415 for XML EPG parsing according to the present invention.

In the mobile broadcast receiver configured as described above, the tuner 401 tunes a frequency corresponding to an ensemble including a DMB service selected by a user, lowers it to the baseband, and outputs the demodulator 402. The demodulator 402 performs an inverse modulation scheme, that is, OFDM demodulation, and outputs a transmission frame composed of a synchronization channel, an FIC, and an MSC to the DAB decoder 403.

The DAB decoder 403 decodes the FIC and the MSC with reference to the synchronization channel in the demodulated transmission frame. If the FIC is decoded, channel information, that is, an ensemble label, a service label, and a virtual channel number assigned to the service can be extracted from the MCI, and a channel map is generated from the extracted channel information and stored in the memory 404. do.

When the MSC is decoded, actual data can be extracted. If the extracted data is an audio signal, the data is output to the first audio decoder 405, and if the data is a data stream, the MSC is output to the RS decoder 406 in the DMB decoder.

The first audio decoder 405 decodes and outputs the compressed coded audio signal using a masking pattern adapted universal sub-band integrated coding and multiplexing (MUSCAM) scheme.

The RS decoder 406 performs further error correction on the data stream and outputs it to the MPEG2 demux 407.

The MPEG2 demux 407 performs transport stream depacketizing, packetized element stream (PES) depacketizing, and sync layer (SL) depacketizing on an error corrected data stream. After separating the audio, video, OD, BIFS and output to each decoder (408 ~ 411).

The decoders 408 to 411 decode and output audio, video, OD, and BIFS using a corresponding algorithm. As an example, the second audio decoder 408 decodes the audio signal with the BSAC decoding algorithm, and the video decoder 409 decodes the video signal with the H.264 decoding algorithm.

On the other hand, the MOT protocol is a transfer algorithm for transmitting information through various DAB (or DMB) data channels, and enables interoperability between a data service and an application type. At this time, the EPG service is also transmitted as an object through the MOT protocol. The EPG service object is divided into segments and transmitted in packet mode to facilitate data management during transmission.

Therefore, the MOT decoder 412 collects segments of the EPG service delivered in the form of an object, forms an XML file, and outputs the XML file to the XML parser 413. The XML parser 413 parses each XML (markup language) file of the EPG, extracts program and channel related information, and outputs the information to the EPG processing unit 414. The EPG processing unit 414 stores program and channel related information in a storage device such as a memory, or displays it on a screen in a graphic form having a user interface (UI) function through the EPG browser 415 if necessary.

In this case, when there are a plurality of formats set in the received DMB service, the MOT decoder 412, the XML parser 413, the EPG engine 414, and the EPG browser 415 may be configured to the plurality of formats set in the DMB service. All the corresponding character strings are displayed on the EPG screen in the form and order of the preset pattern element values.

On the other hand, the terms used in the present invention (terminology) are terms defined in consideration of the functions in the present invention may vary according to the intention or practice of those skilled in the art, the definitions are the overall contents of the present invention It should be based on.

The present invention is not limited to the above-described embodiments, and as can be seen in the appended claims, modifications can be made by those skilled in the art to which the invention pertains, and such modifications are within the scope of the present invention.

According to the method for an EPG service according to the present invention described above and a mobile broadcast receiver applying the same, even when a plurality of formats are set in a transmitted DMB service, all of the plurality of format information can be displayed as an EPG. By doing so, both the receiver producer and the user can obtain accurate information about the service.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

Claims (9)

A program guide information service method of a mobile broadcasting system transmitting and receiving a broadcast service in which at least one format is set, the method comprising: Constructing and transmitting a format property of program guide information to display all format information set in the broadcast service as a character string; And Parsing a format attribute of the transmitted program guide information and displaying all of the format information set in the broadcast service as a corresponding character string, The program guide information is At least one service element comprising a restriction element having a basic data type set to 'string', and a pattern element facet that lists strings of formats to be displayed as the basic data type of the restriction element as a pattern value. Guide Information Service Method. The method of claim 1, The pattern value of the pattern element facet is a program guide information service method, characterized in that listed in the plurality of character strings that can each recognize the format information set in the broadcast service. The method of claim 1, Program guide information service method comprising an indicator for controlling the display of the character string between each character string. delete The method of claim 1, And a default value of the format attribute is set to 'audio'. delete delete A reception signal processor configured to tune and demodulate a broadcast service of a specific channel; A decoder for separating and filing program guide information including a format attribute of a broadcast service demodulated by the received signal processor; And And an EPG processing unit for parsing the format attribute of the program guide information file output from the decoder and displaying all of the format information set in the broadcast service as a corresponding character string. The program guide information is A restriction element whose primitive data type is set to 'string', and And at least one service element comprising a pattern element facet that lists strings of formats to be represented as a basic data type of the restriction element as a pattern value. The method of claim 8, The pattern value of the pattern element facet is listed as a plurality of character strings each capable of recognizing format information set in a broadcast service. Between each string contains markers to control the display of that string. And a default value of the format attribute is set to 'audio'.

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