KR101179828B1 - Method and apparatus for structure of Electornic Service Guide according to relationship between service data stream and ESG data model in Digital Video Broadcasting system - Google Patents

Abstract

The present invention relates to a method and an apparatus for configuring an electronic service guide according to a connection relationship between a data model of an electronic service guide and a service data stream in a digital video broadcasting system. A process of analyzing data of services, a process of determining the number of programs constituting the services, and when the service is composed of a plurality of programs, one service fragment has a plurality of content fragments, The plurality of content fragments have one or a plurality of components for each fragment, wherein the one or a plurality of components are configured to have one or a plurality of acquisition fragments, and the service is composed of one program, If the data model hierarchy of the origin is the same as for multiple programs, one service fragment has one content fragment, the one content fragment has one or multiple components, and the one or multiple components have one or multiple components. And a step of encoding the ESG data according to the characteristics of each fragment, and collecting and transmitting the encoded ESG data to an ESG stream. do.

Digital Video Broadcastin (DVB), Electronic Service Guide (ESG), Data Model, Transport Stream

Description

Method and apparatus for structure of Electornic Service Guide according to relationship between service data stream and ESG data model in digital video broadcasting system in Digital Video Broadcasting system}

1 is a diagram of a structured ESG data model in a typical DVB system.

2 is a flowchart illustrating the operation of a transmitter according to a preferred embodiment of the present invention.

3 is a flow chart showing operation of a receiver according to a preferred embodiment of the present invention.

4 is a view schematically showing the structure of a transmitter according to a preferred embodiment of the present invention.

5 is a view schematically showing the structure of a receiver according to a preferred embodiment of the present invention.

6 is a flowchart illustrating the operation of a receiver according to another exemplary embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital video broadcasting system (DVB system). In particular, the present invention relates to a service data transmission stream and an electronic service guide in transmitting information on a service using an electronic service guide (ESG). The present invention relates to a method and apparatus for configuring an electronic service guide according to a hierarchical connection with a data model.

Digital Video Broadcasting (DVB) system is a European digital broadcasting technology that is a transmission standard for supporting digital multimedia services as well as existing digital broadcasting for mobile and portable.

In the DVB system, it is possible to multiplex broadcast data based on MPEG2 TS (Motion Picture Experts Group2 Transport Stream) and simultaneously transmit an IP based data stream. In addition, in the DVB system, various services can be multiplexed and transmitted in one IP stream, and the terminal receives data of the transmitted IP stream and demultiplexes it into individual services to demodulate the service and display the screen to the user. You can output At this time, the user needs information on the type of the various services provided in the DVB system and what contents each service includes.

In the DVB system, an electronic service guide (hereinafter referred to as an ESG) exists to inform information about each service. The ESG data includes time information, related content information, information necessary for receiving the content, information necessary for purchasing the content, and the like for a specific service. The ESG constructs a data model for efficient transmission and determines the data to be transmitted based on the data model.

FIG. 1 illustrates a structure of an ESG data model in a general digital video broadcasting (DVB) system.

Referring to FIG. 1, each of the illustrated blocks represents a fragment of ESG data. That is, the ESG data model 100 includes a service fragment 102, a schedule event fragment 104, a content fragment 106, an acquisition fragment 108, and a service bundle fragment ( 110, a purchase fragment 112, and a purchase channel fragment 114.

The service fragment 102 includes a description of the overall service, the schedule event fragment 104 represents information of a service over time, and the acquisition fragment 108 stores service data. Includes service access information that needs to be received in order to receive, the service bundle fragment 110 includes information on the case of tying several services into one service bundle, the purchase fragment 112 Informs the price information for purchasing the service bundle, the purchase channel fragment 114 informs the information about the system to be used to obtain the right for the purchase.

Each fragment of the data model 100 may refer to another fragment, and an arrow between the fragments indicates the reference relationship. Here, the reference refers to information that the current fragment is associated with its own fragment using information transmitted from other fragments. That is, when a service is composed of multiple contents, the service fragment 102 includes only the description of the entire service, for example, the name of the service, the language of the service, and the like, and the content itself transmitted through the service. It does not include the description, but refers to the service fragment of the service in the content fragment 106 of the corresponding content. In addition, in order to know various pieces of information necessary for the terminal to receive the service, for example, session information used in a transmitted protocol, the acquisition fragment 108 referred to by the service fragment 102 is received and demodulated. You can get information.

The ESG data is transmitted to the terminal using a separate IP stream at a separate time from the actual data stream. Accordingly, the service provider may use the ESG data model to provide information before the service transmission, which the user should know before receiving the service. By receiving the ESG stream, the terminal acquires information necessary for receiving a service provided by a service provider, and when the user selects a specific service, the terminal accesses a data stream through which the service is transmitted and provides data. Will be received. Information for the terminal to access the service data stream is transmitted through the acquisition fragment 108 as described in FIG.

Table 1 below shows the structure of acquisition fragments among ESG data of the DVB system.

<complexType name = "AcquisitionType">
<sequence>
<element name = "ComponentDescription" type = "esg: ComponentDescriptionType" maxOccurs = "unbounded"/>
<element name = "ZappingSupport" type = "esg: ZappingSupportType" minOccurs = "0"/>
<element name = "KeyStream" type = "esg: KeyStreamBaseType" minOccurs = "0" maxOccurs = "unbounded"/>
</ sequence>
<attribute name = "contentMimeType" type = "mpeg7: mimeType" use = "required"/>
<attribute name = "acquisitionID" type = "anyURI" use = "required"/>
</ complexType>

<complexType name = "ComponentDescriptionType">
<sequence>
<element name = "ComponentCharacteristic" type = "esg: ComponentCharacteristicType" minOccurs = "0" maxOccurs = "unbounded"/>
<element name = "SessionDescription" type = "esg: SessionDescriptionBaseType"/>
</ sequence>
</ complexType>

Referring to [Table 1], the acquisition fragment is declared as an acquisition type (AcqusitionType), the acquisition type (AcquistionType) has a contentMimeType and acquisition ID (acqusitionID) as its attribute. In Table 1, an acqusitionID is a field for setting a unique value so that the fragment can be distinguished from other fragments. It becomes possible to declare. The contentMimeType attribute is a field for indicating what type of service the service to which the acquisition type is referred to is. The terminal may determine whether the service is a type that the terminal can reproduce.

The acquisition type has an element description, a component description, a channel switching support, and a key stream. The component description is a field for describing a component of a service to which the acquisition fragment is referenced. The component description element again has a component characteristic (componentCharacteristic) and a session description (SessionDescription). The component characteristic (componentCharacteristic) is a field indicating the characteristic of the component and includes a characteristic field such as an audio component, a video component, or a file download component. The SessionDescription is a field for transmitting a Session Description Protocol (SDP) file indicating session information of a stream through which the components are transmitted. The SDP file may be transmitted together in an ESG stream. Alternatively, a method of transmitting the SDP file in another stream and transmitting session information for the other stream as an ESG stream may be possible.

When the SDP file is transmitted together in an ESG stream, the SessionDescription field transmits SDP file contents. When the SDP file is transmitted in another stream, the SessionDescription field indicates a stream in which the SDP file is transmitted. Send session information. The channel switching support (ZappingSupport) is a field for transmitting data for output to the screen of the terminal for a delay time when the channel switching occurs when the channel switching occurs, the data to be output on the screen when the channel switching is supported by the channel switching ( It is possible to inform the information on the other stream which is transmitted directly in the ZappingSupport) field or transmitted in another stream and in which the data is transmitted in the ZappingSupport field. The key stream (KeyStream) is a field having information on a key for decrypting the encryption when the service to which the acquisition fragment is referenced is encrypted.

As described above, the terminal acquires information for accessing the stream through which the service is transmitted to receive the service through the acquisition fragment of Table 1 above.

In addition, the terminal acquires basic information about a service to be shown to the user through a fragment of the ESG data model. The basic information about the service can be obtained by collecting information of the respective fragments. The description of the characteristics of the service among the basic information of the service can be obtained from the service fragment and the content fragment. The characteristic of the service refers to the name of the service, the service logo, the service genre, the service type, the service language, the service description, and the like that make up the service, the name of the content, the synopsis of the content, the language of the content, and the genre of the content. . The content is again composed of components. The component is a unit constituting content, and the component type may be a video component, an audio component, a file download, or the like.

The component may constitute one content by itself, or a plurality of components may constitute one content. The description of the component is transmitted through the component description (componentDescription) of the [Table 1]. The component description (componentDescription) is composed of a component characteristic (componentCharacteristic) again, it means that a plurality of component characteristics (componentCharacteristic) constituting the component description (componentDescription) is transmitted together through one session. The service fragment for transmitting the information, the content fragment, and the acquisition fragment have a reference relationship with each other. One service fragment may have a plurality of content fragments, and one content fragment may have a plurality of acquisition fragments. That is, one service may describe one or more contents, and one content may describe one or more components.

The range of services may be determined by a service provider. The range may be one channel provided by the service provider, an aggregate of several programs that bundle specific paid services, or a single program may constitute a service such as sports relay.

In constructing the ESG data model according to the related art operating as described above, ambiguity may occur in constructing the ESG data model for the description of the service due to the diversity of the number of programs constituting the service. There was a problem.

Therefore, in order to solve the problems of the prior art operating as described above, the present invention, in transmitting information about a service using an electronic service guide in a digital video broadcasting system, the service data transmission stream and the electronic service guide of the It provides a connection relationship between hierarchical structures with a data model and provides a method and apparatus for configuring an electronic service guide according to each connection relationship.

The present invention provides a method and apparatus for configuring the ESG data model by defining a connection relationship between the information of the service and the ESG data model in order to remove ambiguity in configuring the ESG data model for service information transmission. .

According to an embodiment of the present invention, in a method of configuring an electronic service guide according to a connection relationship between a data model of an electronic service guide and a service data stream in a digital video broadcasting system, metadata of each service is collected to collect data of each service. And a process of determining a number of programs constituting the services, and when the service is composed of a plurality of programs, one service fragment has a plurality of content fragments, and the plurality of contents. A fragment has one or a plurality of components for each fragment, the one or a plurality of components to have one or a plurality of acquisition fragments, the service is composed of one program, the data module of the transmitter When the hierarchical structure is the same as in the case of multiple programs, one service fragment has one content fragment, the one content fragment has one or multiple components, and the one or multiple components have one or multiple acquisition fragments. And a process of encoding ESG data according to the characteristics of each fragment, and collecting the encoded ESG data and transmitting the encoded ESG data to an ESG stream.

Another embodiment of the present invention provides a method of configuring an electronic service guide according to a connection relationship between a data model of an electronic service guide and a service data stream in a digital video broadcasting system, the method comprising: receiving an ESG stream from a transmitter; Demodulating the service fragment and the schedule event fragment transmitted through the ESG stream, determining whether the service is composed of one program through the demodulated fragments, and the service is composed of a plurality of programs. If there is, a process of demodulating a plurality of content fragments and the fragments referencing one or a plurality of acquisition fragments for each content fragment, and the service is composed of one program, the data of the transmitter If the del-layer structure identical to the number of programs when, a content fragment, and refer to one or a plurality of acquisition fragment each content fragment of the one and which is characterized in that it comprises the step of demodulating the fragments.

The operation principle of the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intentions or customs of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification.

The DVB system multiplexes MPEG2 TS-based broadcast data and simultaneously transmits IP-based data streams. The MPEG2 TS (Transport Stream) is composed of a plurality of Elementary Streams (ES).

Since a general broadcast program can be regarded as a video stream, if the MPEG2 TS is assumed to be a video stream and its structure is classified, the video stream is composed of an audio stream, a video stream, a subtitle, and the like. At this time, the audio stream, the video stream, the subtitle, and the like are ES, and the TS is configured as a unit for multiplexing and transmitting the ES. That is, one program can be regarded as one MPEG2 TS.

Even if the service data is an IP stream, since the final transmission unit is MPEG2 TS, the present invention defines as a basic assumption that service data is transmitted to the MPEG2 TS.

<First Embodiment>

The first embodiment defines a set of one or more programs as one service when there is more than one program constituting the service when the service data is transmitted to the MPEG2 TS.

According to the first embodiment, when there is more than one program constituting the service, the one or more programs are regarded as one set and defined as one service. That is, the one or more programs may be configured based on certain common elements, and thus, the set of one or more programs may have one name. For example, when a whole program broadcasted through a channel provided by a service provider is declared as a service, the program collection may be defined by the name of the service provider. In addition, when the one or more program aggregates are formed by collecting only paid content, the program aggregate may be defined as a premium service. As described above, a collection of programs must have a meaning, and thus, the set of programs must be defined as a service, and a description thereof must be made through a service fragment.

When the service fragment defines a set of programs constituting the service as one service and includes a description thereof, a fragment for a unique description of each program should exist. This is done through content fragments. Since a plurality of content fragments may exist in one service fragment, the content fragment includes a description of one program and the plurality of content fragments refer to one service fragment.

When the content fragment includes characteristic information of a program such as a name, genre, language, and synopsis of each program, a description of individual video streams and audio streams constituting the program is required, and the video stream and audio stream are one component. Is declared. In order to describe the components constituting each program, a component characteristic field (componentCharacteristic) field is used in the acquisition fragment. In the acquiring fragment, not only the component characteristic is described through the component characteristic field, but also session information for acquiring the component is transmitted. The session information is transmitted in a session description in a component description as described in Table 1 above. The components may be composed of one component or a plurality of components according to the characteristics of the program. When the program is composed of a plurality of components, when the plurality of components are transmitted through one session, a plurality of component characteristics are declared in one component description and each component is a different session. In the case of transmission through a header, a plurality of component characteristics (componentCharacteristic) are declared in different component descriptions (componentDescription).

As a result, in the first embodiment, one service fragment has a plurality of content fragments, and the plurality of content fragments have one or more components for each fragment. In addition, the one or more components may be transmitted through one or more acquisition fragments.

<< second embodiment >>

According to the second embodiment, when there is only one program constituting the service when the service data is transmitted to the MPEG2 TS, the service consisting of only one program is defined as one service.

According to the second embodiment, even if the service is composed of one program, it is proposed to define one service according to the characteristics of the program. For example, when the one program is a baseball sports game, in addition to the unique name of the sports program, one baseball sports relay service according to the type of the sports program may be defined and the description of the service may be transmitted through the service fragment. have. That is, although one program is transmitted, the characteristics of the one program are transmitted through the service fragment.

When the service fragment defines a program constituting the service as one service, and includes a description of the characteristics of the service, the unique description of the program is made through a content fragment. Since the service is composed of one program, the contents of the content fragment and the contents of the service fragment may overlap, and in this case, it is preferable to set the priority to transmit the duplicated information through the content fragment. Because the content fragment may refer to another service, when the description of the program is described only in the service, there is a possibility that a shortage of information may occur when referring to another service fragment. Since the service consists of one program, there is only one content fragment in the service fragment.

When the content fragment includes characteristic information of a program such as a name, genre, language, and synopsis of the program, a description of individual video streams and audio streams constituting the program is required, and the video stream and audio streams are formed as one component. Is declared. In order to describe the components constituting each program, a component characteristic field (componentCharacteristic) field is used in the acquisition fragment. In the acquiring fragment, not only the component characteristic is described through the component characteristic field, but also session information for acquiring the component is transmitted. The session information is transmitted in a SessionDescription in a Component Description as described in Table 1 above. The components may be composed of one component or a plurality of components according to the characteristics of the program. When the program is composed of a plurality of components, when the plurality of components are transmitted through one session, a plurality of component characteristics are declared in one component description and each component is a different session. In the case of transmission through a header, a plurality of component characteristics (componentCharacteristic) are declared in different component descriptions (componentDescription).

As a result, in the second embodiment, one service fragment has one content fragment, and the one content fragment has one or more components. The one or more components may be transmitted via one or more acquisition fragments.

<< third embodiment >>

In the third embodiment, when there is only one program constituting the service when the service data is transmitted to the MPEG2 TS, the one program itself is defined as one service.

According to the third embodiment, when the service is composed of one program, a description of the program may be transmitted through a service fragment. That is, the name, genre, language, synopsis, etc. of the program are transmitted using a field in the service fragment. The information is information transmitted by the content fragments of the first and second embodiments.

If the service fragment contains a unique description of the one program, then the content fragment now describes the unique features of the component stream. The one program may be composed of a video stream or an audio stream, or a video stream and an audio stream, or a video stream and an audio stream and a file. Therefore, the content fragment may be one or more according to the characteristics of the program. In the content fragment, names, genres, languages, contents, etc. of the individual component streams are transmitted. If the program has more than one component stream, the contents of content fragments for the other component streams may be duplicated. That is, if there is a video stream and an audio stream for one program, each component stream constitutes one program, so the name, genre, and content of each component will be the same, but this can be ignored through the process of the terminal. have. Since the service may be one program or one or more component streams constituting the program, one or more content fragments exist in the service fragment.

Acquisition fragments exist to transmit acquisition information of the respective component streams when the content fragment includes a description of the individual video stream and the audio stream constituting the program. The acquisition fragment includes information on a session in which the component streams are transmitted. The session information of the components is transmitted in a session description in a component description as described in Table 1 above. The acquiring fragment relates to one content fragment. Since the one content fragment includes information of only one component stream, there is one component description in the acquisition fragment and one in the component description. Only the component property of (componentCharacteristic) exists. However, since the same component stream may be transmitted through different sessions, it is possible that a plurality of acquisition fragments exist.

As a result, in the third embodiment, one service fragment may have one or a plurality of content fragments, and the one content fragment may be transmitted through one or a plurality of acquisition fragments.

2 is a flowchart illustrating the operation of a transmitter according to a preferred embodiment of the present invention.

Referring to FIG. 2, in step 202, the transmitter collects metadata that is related information of a service. In step 204, the collected data of each service is analyzed, and in step 206, the number of programs constituting the services is determined. If the service is composed of a plurality of programs instead of one program, the process proceeds to step 208. According to the first embodiment, the service fragment defines a set of programs as one service and transmits a description of the service. . In addition, a content fragment transmits a description of each individual program, and there are a plurality of content fragments. Here, the plurality of content fragments have an acquisition fragment describing the components constituting the respective programs, and one or more components may be provided for each content.

As a result of the analysis in step 206, when the service consists of only one program, in step 209, the data model hierarchy of the transmitter is determined. The hierarchical structure refers to a process of defining services, contents, and components as described above, and configuring each fragment of the ESG data model according to the prescribed hierarchies. If the transmitter sets the hierarchical structure of the data model irrespective of the number of programs constituting the service, that is, when the service is composed of one program and when the service is composed of a plurality of programs, According to the second embodiment, the process proceeds to step 210, the service fragment defines a program as a service and transmits a description of the service. The content fragment also transmits a description of itself to the one program, and the one content fragment has an acquisition fragment describing the components constituting the one program. Here, the component may be one or a plurality. When the data model hierarchy of the sender is set to be the same as when a plurality of programs is configured even when a single program is configured, the sender has a hierarchical structure regardless of the number of programs in which the service is configured. It has the advantage of being able to maintain one method without changing.

If the data model of the transmitter is different from the case of a plurality of programs in step 209, the service fragment transmits a description of one program itself according to the third embodiment of the present invention. . Accordingly, the content fragment transmits a description of individual component streams constituting the one program. The content fragment may be one or multiple in one service fragment. In addition, for each piece of content fragments, for each piece of the individual component streams, each individual component stream is declared as one component and transmits session information of the component. Herein, the acquisition fragment may be one or a plurality of content fragments. If the service is defined as a program by changing the data model hierarchy of the transmitter, the ESG data model can be declared more efficiently, and duplicated contents are not transmitted, thereby enabling efficient use of the transmission resources. The ESG data that have undergone the definition step for the fragment are encoded according to the characteristics of each fragment in step 214, and the encoded ESG data is collected in step 216 and transmitted to the ESG stream in step 218.

In the case where the service is composed of one program, configuring one of the second and third embodiments will select a more suitable method according to the transmitter or the service policy in consideration of the advantages of each embodiment. The flow chart of FIG. 2 is performed.

3 is a flowchart illustrating the operation of a receiver according to an exemplary embodiment of the present invention.

Referring to FIG. 3, the receiver receives an ESG stream in step 302. In step 304, the service fragment and the schedule event fragment transmitted through the received ESG stream are demodulated. Through the demodulated fragments, the terminal can determine whether the service is composed of one program in step 306. If the service is composed of a plurality of programs instead of one program in step 306, the terminal proceeds to step 308 according to the first embodiment, and the plurality of content fragments, and each content fragment The fragments are demodulated because they refer to one or more acquisition fragments.

In the case where the service consists of one program in step 306, two different terminals may operate according to the second and third embodiments. In step 309, the terminal determines whether the received data model hierarchical structure is the same as that of the multiple program, and if the hierarchical structure of the received data model is the same as the multiple program, according to the second embodiment of the present invention. It is determined that the case and proceeds to step 310. In step 310, the terminal has one content fragment and one or more acquisition fragments and demodulates the fragment.

If the terminal determines in step 309 that the received data model hierarchy is not the same as when there are multiple programs, the terminal according to the third embodiment proceeds to step 312, and the terminal proceeds to step 312 in which one or more content fragments are carried out. And it is determined that each content fragment refers to one or a plurality of acquisition fragments and demodulate the fragments.

When the demodulation of the fragment is finished, other demodulations are demodulated in step 314 and the demodulation of all fragments is completed. In step 316, demodulation of the ESG data is completed.

4 is a view schematically showing the structure of a transmitter according to a preferred embodiment of the present invention.

Referring to FIG. 4, a plurality of MPEG 2 streams, which are TV streams, are input to a DVB transmitter, and an IP stream is input in addition to the TV stream. IP-based service data is input to the IP stream. The ESG data generated to transmit the service guide information for the MPEG 2 TV stream data and the IP stream data is also transmitted to the IP stream, and the ESG data is stored in each fragment according to the characteristics of the data in the ESG data encoder 410. Is encoded. A method of configuring data to be transmitted through a fragment for encoding a fragment includes an ESG data model having a different structure according to the number of programs constituting a service and a type of fragment to transmit a description of the program according to FIG. 2. It becomes possible.

Each encoded ESG fragment constitutes an ESG container, and the ESG container is input to the DVB IP encapsulator 430 in the form of an IP stream. The input IP stream is encapsulated in an MPEG 2 transport stream (TS) in the DVB IP encapsulator 430 and multiplexed in the multiplexer 440 together with another MPEG 2 TS that is a TV stream. The multiplexed TS is modulated into an OFDM symbol in the DVB modulator 450 and transmitted through an antenna.

5 is a view schematically showing the structure of a receiver according to the present invention.

Referring to FIG. 5, the DVB receiver receives a signal through an antenna and the received signal undergoes OFDM demodulation in the DVB demodulator 510. The demodulated data is divided into an IP encapsulated packet and an MPEG 2 TS packet in the demultiplexer 520. The TS packet goes through a series of processes necessary for the data processing unit 550 to show the service to the user. The packet, which has undergone the IP encapsulation, is demodulated back to an IP stream in the IP decapsulator 530, and the IP stream is divided into an ESG stream and a data stream.

The data stream is input to the data processor 550 in the same manner as the TS packet. The ESG stream is input to the ESG processor 540. The ESG processing unit 540 analyzes the received ESG data and demodulates the ESG fragment. In the process of demodulating the ESG fragment, the number of fragments to be processed varies according to the structure of fragments of the received ESG data. 3, the ESG processor 540 transmits ESG data to the user interface 560 and outputs the ESG data to a screen.

6 is a flowchart illustrating the operation of a receiver according to another exemplary embodiment of the present invention.

6 illustrates a case where preview information is included in an ESG. The preview information may be transmitted to the service fragment and the content fragment in the same format, respectively, and the preview information of the service fragment and the preview information of the content fragment are generally different from each other. A method of processing at the receiving end when a plurality of preview information is included in the ESG through a mapping relationship between the preview information carried in the ESG data transport stream and the ESG data model.

Referring to FIG. 6, in step 603, an ESG stream is received, and in step 604, a service fragment and a schedule event fragment are demodulated. In step 605, the existence of the preview information in the service fragment is checked and stored if it exists. In step 606, it is checked whether the service consists of one program. If the service is composed of a plurality of programs, the service is a program set service, and each content is composed of each program. In this case, the preview information is displayed in the service fragment and also in the content fragment. The information exists. In step 610, a plurality of content fragments and one or a plurality of acquisition fragments are demodulated, and in step 612, the presence or absence of preview information in the content fragment is checked and stored. If the user commands the ESG display in step 614, the service preview and a plurality of content previews are displayed in step 618. Since a specific display configuration method is different for each ESG standard browser, it is not described in the present invention.

If the service consists of one program in step 606, two different terminals may operate. In step 609, the terminal determines whether the received data model hierarchical structure is the same as when the program is multi-programmed. Demodulate one, one or several acquisition fragments. In step 622, the existence of the preview information in the content fragment is checked, and if present, it is stored. If the user commands the ESG display in step 624, a content preview is displayed in step 626. In general, in the case of one service fragment and one content fragment, since the preview information is the same, only one of the service or content fragment is displayed in this case. Alternatively, since content fragments generally have a high priority, only a preview of the content fragments may be displayed according to the specific configuration of the ESG browser.

If the hierarchical structure of the received data model is not the same as that of a plurality of programs in step 609, the process proceeds to step 630 to demodulate one or more content fragments and one or more acquisition fragments. If the user commands the ESG display in step 632, the service preview is displayed on the terminal in step 634. In this case, the service is composed of one program, and each content corresponds to a video stream, an audio stream, or the like. In this configuration, since there is no preview information in the content fragment, only the service preview is displayed in step 634.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but is capable of various modifications within the scope of the invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the scope of the appended claims, and equivalents thereof.

In the present invention operating as described in detail above, the effects obtained by the representative ones of the disclosed inventions will be briefly described as follows.

The present invention defines a connection relationship between a service data transport stream and an ESG data model in order to eliminate ambiguity that may occur in constructing the ESG data model due to the diversity in the number of programs constituting the service. It is effective to construct an efficient ESG by eliminating ambiguity by configuring the ESG according to the connection relationship and by defining the connection relation for recognition and access according to the configuration of the preview information transmitted from the ESG. have.

Claims (13)

A method of constructing an electronic service guide based on a connection relationship between a data model of an electronic service guide and a service data stream in a digital video broadcasting system, Collecting metadata related to each service to analyze data of each service; Determining the number of programs constituting the services as a result of the analysis; When the service is composed of a plurality of programs, one service fragment having a plurality of content fragments, wherein the content fragment has at least one component, and the component is configured to have at least one acquisition fragment; When the service is composed of one program and the data model hierarchy of the transmitter is the same as when multiple programs, one service fragment has one content fragment, the content fragment has at least one component, and the component Is configured to have at least one acquisition fragment; Encoding ESG data according to the characteristics of each fragment using the service fragment, the content fragment, and the acquisition fragment; And collecting the encoded ESG data and transmitting the encoded ESG data in an ESG stream. A method of constructing an electronic service guide based on a connection relationship between a data model of an electronic service guide and a service data stream in a digital video broadcasting system, Collecting metadata related to each service to analyze data of each service; Determining the number of programs constituting the services as a result of the analysis; When the service is composed of a plurality of programs, one service fragment having a plurality of content fragments, wherein the content fragment has at least one component, and the component is configured to have at least one acquisition fragment; If the service is composed of one program and the data model hierarchy of the sender is not the same as when multiple programs, one service fragment has at least one content fragment, and the content fragment has at least one component, Configuring the component to have at least one acquisition fragment; Encoding ESG data according to the characteristics of each fragment using the service fragment, the content fragment, and the acquisition fragment; And collecting the encoded ESG data and transmitting the encoded ESG data in an ESG stream. delete A method of constructing an electronic service guide based on a connection relationship between a data model of an electronic service guide and a service data stream in a digital video broadcasting system, Receiving an ESG stream from a transmitter; Demodulating a service fragment and a schedule event fragment transmitted through the received ESG stream; Determining whether a service is composed of one program through the demodulated fragments; When the service is composed of a plurality of programs, demodulating a plurality of content fragments and at least one acquisition fragment referenced by the content fragments; If the service is composed of one program, and the data model hierarchy of the transmitter is the same as that of the multiple programs, demodulate one content fragment and at least one acquisition fragment referenced by the one content fragment. How to configure the electronic service guide, including the process of. 5. The method of claim 4, The process of demodulating fragments of a service composed of the plurality of programs Storing the preview information if there is preview information in the content fragment; A method of constructing an electronic service guide comprising displaying a service preview and a plurality of content previews according to an ESG display command of a user. 5. The method of claim 4, The process of demodulating the programs of the service consisting of the one program Storing the preview information if there is preview information in the content fragment; A method of constructing an electronic service guide comprising displaying a plurality of content previews according to a user's ESG display command. A method of constructing an electronic service guide based on a connection relationship between a data model of an electronic service guide and a service data stream in a digital video broadcasting system, Receiving an ESG stream from a transmitter; Demodulating a service fragment and a schedule event fragment transmitted through the received ESG stream; Determining whether a service is composed of one program through the demodulated fragments; If the service is composed of a plurality of programs, demodulating a plurality of content fragments and at least one acquisition fragment referred to by the content fragments; Demodulating at least one content fragment and at least one acquisition fragment referred to by the content fragment, if the service is composed of one program and the data model hierarchy of the transmitter is not the same as that of the multiple programs. How to configure the electronic service guide comprising a. 8. The method of claim 7, The process of demodulating programs of a service composed of the plurality of programs Storing the preview information if there is preview information in the content fragment; A method of constructing an electronic service guide comprising displaying a service preview and a plurality of content previews according to an ESG display command of a user. 8. The method of claim 7, And demodulating the programs of the service composed of the one program, displaying a plurality of service previews according to an ESG display command of the user. A method of constructing an electronic service guide based on a connection relationship between a data model of an electronic service guide and a service data stream in a digital video broadcasting system, Receiving an ESG stream from a transmitter; Demodulating a service fragment and a schedule event fragment transmitted through the received ESG stream; Determining whether a service is composed of one program through the demodulated fragments; When the service is composed of a plurality of programs, demodulating a plurality of content fragments and at least one acquisition fragment referred to by the content fragments; Demodulating one content fragment and at least one acquisition fragment referred to by the one content fragment if the service is composed of one program and the data model hierarchy of the transmitter is the same as that of the multiple programs. and; Demodulating at least one content fragment and at least one acquisition fragment referred to by the content fragment if the service is composed of one program and the data model hierarchy of the sender is not the same as the multiple program. How to configure the electronic service guide. The method of claim 10, The process of demodulating the programs of the service consisting of a plurality of programs Storing the preview information if there is preview information in the content fragment; A method of constructing an electronic service guide comprising displaying a service preview and a plurality of content previews according to an ESG display command of a user. The method of claim 10, The process of demodulating the same programs as when the hierarchical structure of the service composed of one program is a plurality of programs Storing the preview information if there is preview information in the content fragment; A method of constructing an electronic service guide comprising displaying a plurality of content previews according to a user's ESG display command. The method of claim 10, The process of demodulating programs that are not the same as when the hierarchical structure of a service composed of one program is a plurality of programs A method of constructing an electronic service guide comprising displaying a plurality of service previews according to a user's ESG display command.

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