KR20080008958A - Method and apparatus for transmitting/receiving electronic service guide in digital broadcasting system - Google Patents

Abstract

A method and an apparatus for transceiving an ESG in a digital broadcasting system are provided to group ESG information efficiently when transmitting the ESG in a multistream mode, thereby enabling a user to select and receive necessary ESG data easily. A method for transmitting an ESG(Electronic Service Guide) in a digital broadcasting system comprises the following steps of: gathering ESG data to be transmitted; setting the number of IP(Internet Protocol) streams to transmit the ESG data for transmitting the ESG data in a multistream mode(616); generating partitioning information including at least one partitioning standard for partitioning the ESG data and at least one partitioning value for each partitioning standard used in each IP stream(620,622); and transmitting the partitioned ESG data through the IP streams according to the partitioning information(630). The partitioning standard includes at least one of a service ID(Identification), a service genre, an absolute time, a profiling type and a session type according to the definition of a provider. The partitioning value includes at least one of a start value and an end value based on the partitioning standard.

Description

METHOD AND APPARATUS FOR TRANSMITTING / RECEIVING ELECTRONIC SERVICE GUIDE IN DIGITAL BROADCASTING SYSTEM}

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

2 is a diagram illustrating a transmission mechanism when ESG data is transmitted in a multistream mode according to the prior art.

3 is a flow diagram illustrating operation of a transmitter for transmitting ESG data in a multistream mode according to the prior art.

4 is a flow diagram illustrating operation of a receiver for receiving ESG data in a multistream mode according to the prior art.

5 is a flowchart illustrating an operation of a transmitter for transmitting ESG data in a multistream mode according to the first embodiment of the present invention.

6 is a flowchart illustrating operation of a receiver for receiving ESG data in a multistream mode according to the first embodiment of the present invention.

7 illustrates a transmission format of a service ID list according to a second embodiment of the present invention.

8 is a diagram for explaining the operation of a transmitter for adding and transmitting a service ID list to an ESG initialization container according to a second embodiment of the present invention.

9 is a flowchart illustrating the operation of a receiver for receiving an ESG initialization container including a service ID list according to the second embodiment of the present invention.

10 is a block diagram showing the structure of a transmitter according to a preferred embodiment of the present invention.

11 is a block diagram showing the structure of a receiver according to a preferred embodiment of the present invention.

The present invention relates to a digital broadcasting system, and more particularly, to a method and apparatus for transmitting and receiving an electronic service guide (hereinafter referred to as ESG) including information on a broadcast program.

Digital Video Broadcasting (DVB) system is a European digital broadcasting technology that is a transmission standard for supporting digital multimedia services not only existing digital broadcasting but also mobile and portable.

In a DVB system, it is possible to multiplex broadcasting data based on a Moving Picture Experts Group 2 (MPEG2) transport stream (TS) and to simultaneously transmit data streams based on an IP (Internet Protocol). In the DVB system, various services can be multiplexed and transmitted in one IP stream, and the receiver can receive the data of the IP stream, demultiplex it into individual services, decode each of them, and output them to the user. have. 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 ESG) is used to inform information about each service. The ESG includes time information, related content information, information necessary to receive the content, information necessary to purchase the content, and the like for a specific service. The ESG provider constructs a data model for efficient transmission of the ESG, and determines ESG data to be transmitted based on the data model.

1 shows an ESG data model of a DVB system. Referring to FIG. 1, each block of FIG. 1 represents a fragment of an ESG. That is, the ESG data model includes the service fragment 102, the schedule event fragment 104, the content fragment 106, the acquisition fragment 108, the service bundle fragment 110, It consists of a purchase fragment 112 and a purchase channel fragment 114.

The service fragment 102 includes a description of the overall service, the schedule event 104 represents the information of the service over time, the acquisition fragment 108 to receive the actual service data It contains information that needs to know, the service bundle fragment 110 includes information on the case of combining a number of services into one service provision, the purchase fragment 112 is a service bundle Informs the price information to purchase, 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 may refer to another fragment. The reference refers to information between current fragments that are related to their fragments using information transmitted from other fragments. That is, when one service is composed of several 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. The description of the contents themselves is not included, but refers to the content fragment 106 of the corresponding contents. In addition, in order to know various pieces of information necessary for receiving the service, for example, session information used in a transmitted protocol, the receiving fragment 108 which the service fragment 102 refers to is decoded by receiving it. The information can be obtained.

The fragments in the reference relationship must have the IP of the fragment they are referring to in their fragment. That is, when the service fragment 102 refers to specific content, the service fragment 102 specifies the ID of the content fragment 106 to be referred to in the service fragment 102.

The ESG is transmitted to the receiver using a separate IP stream at a separate time from the actual data stream. Therefore, the service provider may transmit information that the user should know before receiving the actual service using the ESG data model. ESG can also be used for a variety of purposes in addition to guides for broadcast programs.

The ESG may be transmitted in one IP stream or in one or more IP streams when the amount of ESG data is large. The case of using the one IP stream is called a single stream mode, and the case of using the one or more IP streams is called a multistream mode. In using the multistream mode, a rule for dividing the fragments of the ESG into each IP stream is required. The criterion refers to a rule for partitioning and assigning fragments to each IP stream in consideration of a relationship between fragments when there are several fragments. This criterion is referred to as partitioning information in a DVB system.

As an example, the partitioning information may be a time or a service identifier (ID). For example, in case of transmitting ESG using two IP streams, partitioning information may be set to transmit ESG data up to 12 hours from the present for the first IP stream and 12 hours or more from the second IP stream. have. In the above example, the partitioning rule of each IP stream is time and the partitioning value is 12 hours. One or more partitioning criteria may be used for the ESG, and the ESG data partitioned according to the partitioning information is transmitted in each IP stream.

When using the multistream mode, the receiver should obtain information on how many IP streams the ESG is transmitting and which partitioning criteria the one or more IP streams used. Therefore, information on the parameters used for the partitioning should be transmitted from the transmitter to the receiver.

In transmitting an ESG using partitioning criteria, the ESG is composed of ESG fragments, and the ESG fragments are transmitted through the ESG container. The ESG container is a collection of ESG fragments that contain one or more ESG fragments and are transmitted together with a header describing the characteristics of each fragment. Therefore, initial information necessary for the receiver to decrypt ESG fragments transmitted through the ESG container should be transmitted, and the initial information is transmitted through a separate container. The container for transmitting the initial information is called an ESG Init container. Several fields exist in the ESG initialization container, and a field for transmitting the partitioning information among the various fields is called a partition declaration field. When the ESG is transmitted using the multistream mode, the receiver may know information about each IP stream, partitioning criteria and partitioning values used for each IP stream through the information provided in the partition declaration field.

Table 1 below shows the content and format of a partition declaration field according to Digital Video Broadcasting-Convergence of Broadcasting and Mobile Service (DVB-CBMS) Phase I ESG specification (ETSI TS 102 471).

Syntax No. of Bits Mnemonic ESG Session Partition Declaration { num_fields 8 uimsbf reserved 8 bslbf for (k = 0; k <num_fields; k ++) { field_identifier [k] 16 bslbf field_encoding [k] 16 bslbf field_length [k] 8 uimsbf field_overlap [k] One bslbf reserved 7 bslbf } n_o_IPStreams 8 IPVersion6 One bslbf Reserved 7 bslbf for (i = 0; i <n_o_IPStreams; i ++) { IPStreamID 8 uimsbf if (IPVersion6) { ESGSourceAddress [i] 128 bslbf IPAddress [i] 128 bslbf } else { ESGSourceAddress [i] 32 bslbf PAddress [i] 32 bslbf } Port [i] 16 uimsbf SessionID [i] 16 uimsbf for (k = 0; k <num_fields; k ++) {         if (field_length [k] == 0) {           length [i] [k] 8+ vluimsbf8       } if (overlapping) { start_field_value [i] [k] bslbf } end_field_value [i] [k] bslbf       nextByteBoundary () } }

Table 2 below shows values of an identifier (field_identifier) indicating a partitioning criterion in Table 1 above.

Value Encoding Meaning 0x00 0x0101 (unsigned short) The number of hours for which the fragments are valid. This may be used to split the ESG into various schedule depths. 0x01 0x0000 (string) The URI of the Serivce fragments ServiceID. This may be used to carry all fragments relevants to a particular service.

According to Table 2, the partitioning criterion when the value of the field_identifier is 0x00 has a meaning of 'time'. When start_field_value of Table 1 is '2' and end_field_value is '4', it means that ESG data for services between 2 hours and 4 hours from a specific time is transmitted in the current IP stream. In addition, when the field_identifier is 0x01, the partitioning criterion has a meaning of 'service ID' and is a partitioning value of a Uniform Resource Identifier (URI) format ending with a null value. Distinguish.

2 is a diagram illustrating a transmission mechanism when an ESG is transmitted in a multistream mode according to the prior art.

According to FIG. 2, the receiver checks the IP address of the ESG Bootstrap FLUTE session 202 from Program Specific Information / Service Information (PSI / SI), which is a control channel signal of DVB-H (DVB-H). The role of the bootstrap session is to transmit basic information of the ESG, that is, information about the ESG provider and the ESG list provided by the ESG provider. Each of these pieces of information is transmitted in an ESG Provider Discovery Descriptor 204 and an ESG Access Descriptor 206, in particular the ESG Access Descriptor 206 is an Announcement carousel FLUTE session for each ESG. The IP address of 212 is provided. That is, there is one notification carousel session for each ESG and the role of the notification carousel session 212 is to provide brief information about the ESG transmission and structure.

The ESG initialization container 214 transmitted through the notification carousel session 212 is a partition declaration including an initialization message including the compression method and related parameters of the following ESG containers, and partitioning information such as the information of Table 1 below. Field, and an index list, an index structure, and multi-field sub-indexes, which are parameters representing structure information of an ESG divided into multiple IP streams and transmitted. That is, when one ESG is divided into IP flows and transmitted, a container list for ESG data carried in each IP flow, an ESG fragment list included in each container, and the like are transmitted through the ESG initialization container 214. do. Through this information, the receiver can grasp how the ESG is divided and transmitted without directly accessing the session in which the actual ESG is transmitted. The receiver finds the IP address of the session from which the ESG data is transmitted from the partition declaration field and connects to the session to receive the containers of the ESG fragment containing the ESG data. Complete the ESG data.

3 is a flowchart illustrating an operation of a transmitter for transmitting ESG data in a multistream mode according to the prior art.

Referring to FIG. 3, the transmitter collects ESG data to be transmitted (302) and determines whether to use the multistream mode in transmitting the ESG data (304). If the multistream mode is not used, the collected ESG data Is encoded according to the type of each data. (306) When using the multistream mode, the transmitter sets parameters necessary for the multistream mode. (308) The parameters required when using the multistream mode include partitioning used. The number of references (num_field) N, the overlapping parameter (field_overap) parameters, the partitioning identifier (field_identifier) of the partitioning criteria used, the coding parameter (field_encoding) and the partitioning length (field_length).

The partitioning reference number indicates how many partitioning criteria are used, the overlapping parameter indicates whether or not each partitioning overlaps, the partitioning identifier indicates which criterion each partitioning used, and the partitioning encoding indicates each partitioning value. In this case, the partitioning length indicates a number of bytes indicating a field for each partitioning value. After setting the parameters, the transmitter sets the number of IP streams (n_o_IPStream = P) to transmit the ESG (310).

Thereafter, in order to allocate ESG fragments to each IP stream, IP_stream_number, which is an index of an IP stream to be set, and field_number, which is an index of a partitioning criterion to be set, are initialized to 0, respectively (312). It is determined whether the number of IP streams is smaller than P (314). If IP_stream_number is smaller than P, the transmitter determines whether field_number is smaller than N, which is the number of partitioning criteria. (316) If the field_number is smaller than N, the transmitter overlaps. According to the parameter, it is determined whether the partitioning criteria to be used in the current IP stream are overlapped (320). If the partitioning criterion is not overlapped, only an end value (end_field_value) for the partitioning criterion is set (324). If the partitioning is overlapped, the transmitter sets both a start value (start_field_value) and an end_field_value for the partitioning criterion. (322)

The start value and the end value are partitioning values for the partitioning criterion. For example, when the partitioning identifier is set to 'time', the start value and end value indicate a reference time at which fragments in each IP stream are partitioned. That is, fragments from the time indicated by the start value to the time indicated by the end value become ESG data transmitted in the current IP stream.

When the partitioning criterion is not overlapped, the start value is equal to the "end value of the previous IP stream + 1", so the transmitter sets only the end value without declaring a start value separately. After setting the start value and / or the end value, the transmitter increases the field_number by one to set the start value and the end value for the next partitioning criterion (326) and determines whether the field_number is smaller than N which is num_field. Return to.

If the determination result indicates that field_number is not smaller than N (num_field), since the start and end values for the partitioning criteria used in the current IP stream are finished, the transmitter starts and ends the partitioning criteria used in the next IP stream. In order to set the value, IP_stream_number is increased by one (318), and the process returns to step 314 to determine whether the IP_stream_number is smaller than P (n_o_IPstream).

If the IP_stream_number is not smaller than P (n_o_IPstream) as a result of the determination, all the settings for the IP streams to be used are completed, and the transmitter encodes a partition declaration field in the ESG initialization container to include the set values. All encoded ESG data, including the partition declaration field of the initialization container, are collected (330), and the collected ESG data are transmitted through P IP streams (332).

As described above, the partitioning criteria may be used by overlapping each partitioning value when the partitioning criteria are applied to multiple IP streams. That is, when the partitioning criterion of 'time' is applied, service information of 2 hours to 12 hours in the first IP stream and 10 to 18 hours in the second IP stream may be transmitted. As another example, one hour of ESG data can be transmitted from the first IP stream, one day of ESG data from the second IP stream, and one month of ESG data from the third IP stream. Do.

4 is a flowchart illustrating an operation of a receiver for receiving ESG data in a multistream mode according to the prior art.

Referring to FIG. 4, the receiver first receives ESG bootstrap data through an ESG bootstrap session in order to decode ESG data. (402) The ESG bootstrap session is information on an IP stream through which the receiver transmits ESG data. The basic information necessary to obtain is transmitted. The IP address of the ESG bootstrap session is always fixed and the receiver already knows the fixed IP address. Therefore, when the receiver wants to decode the ESG, the receiver first receives the ESG bootstrap data including the basic information through the ESG bootstrap session. The receiver determines whether the ESG is transmitted through the multistream mode or the singlestream mode with reference to the ESG bootstrap data. (404) When the singlestream mode is used, the receiver determines that the ESG is determined from the ESG bootstrap data. An IP address of the transmitted IP stream is obtained (406), and the ESG data is received and decoded through the IP stream using the obtained IP address (408).

When the multistream mode is used, the receiver obtains an IP address of an ESG notification carousel session from the ESG bootstrap data and receives notification carousel information including an ESG initialization container through the ESG notification carousel session (410). The announcement carousel session is a session for transmitting structure information on a plurality of IP streams through which the ESG is transmitted when the ESG is transmitted using the multistream mode, and provides structure information on the IP streams through the ESG notification carousel session. The containing ESG initialization container is transmitted.

The receiver finds a partition declaration field from the ESG initialization container received through the ESG notification carousel session. (412) If the partition declaration field is not found in the ESG initialization container, the receiver determines an ESG according to the data type indicated by the ESG notification carousel information. If the partition declaration field is found in the ESG initialization container, the receiver acquires the number of IP streams (P) being used to transmit the ESG (416). In the case of using the mode, necessary parameters are also obtained from the partition declaration field. (418) In the case of using the multistream mode, the necessary parameters include a partitioning reference number (num_fields = N), an overlapping parameter (field_overlap), and each partitioning identifier. (field_identifier), encoding parameter (field_encoding) and partitioning path Is (field_length) and detailed description of each parameter is as described with reference to FIG. 3.

From the parameters, the receiver knows partitioning information indicating what partitioning criteria of ESG data transmitted in each IP stream is, and to which IP stream fragments corresponding to each partitioning are transmitted (420). Using the information, the receiver selectively decodes the required ESG data from a particular IP stream.

The selective decoding means that the receiver decodes only partial ESG data, not all ESGs transmitted. For example, the partitioning criterion is time, so that the first IP stream transmits ESG fragments within 12 hours from the reference time, and the second IP stream transmits ESG fragments from 12 hours to 24 hours after the reference time. In this case, the receiver may receive only one IP stream of the two IP streams without decoding all the ESG data for 24 hours according to its reception performance, and may decode only the desired ESG data for 12 hours.

When using the multi-stream mode according to the prior art, in order to encode the partitioning declaration field of the ESG initialization container, the start value (start_field_value) and the end value (end_field_value) corresponding to each partitioning criterion are declared for every IP stream. When there is more than one partitioning criterion, it is possible to configure an ESG transmission scheme to transmit only fragments corresponding to specific partitioning criteria in each IP stream. For example, if you use four IP streams and two partitioning criteria (time and service ID), the first and second IP streams will distribute fragments according to the time of the first partitioning criteria and the third and fourth IP For streams, fragments are distributed according to a service partitioning ID, which is a second partitioning criterion, and ESG data is loaded on each IP stream.

As described above, problems occurring when the ESG is transmitted in the multistream mode by applying the partitioning criteria are as follows.

A single ESG is divided into 'one day ESG', 'one week ESG' and 'one month ESG' using partitioning criteria and transmitted over multiple IP streams, or a week's worth of ESG data is sent to 'sport ESG', 'news' It cannot support scenarios such as sending to ESG '. That is, by using the existing partitioning criteria, the partitioning information for the above-mentioned ESG transmission and the operation of the receiver cannot be defined, and when the ESG data are classified and transmitted as separate ESGs, the ESG data is notified. The burden of separately defining an ESG initialization container in the carousel and transmitting the ESG initialization container to the receiver occurs.

In more detail, the above-described problem is described. In the case of transmitting ESG data grouped by IP stream according to the 'service ID', the value of the 'service ID' is set to a string value so that the receiver has only the string value. It is not known how the services described in the group are grouped. That is, when 'service ID' is used as a partitioning criterion, the receiver cannot determine what services exist between the start value and the end value. Therefore, since the receiver receives all the ESG data through the multiple IP streams and configures them as one ESG, the advantage of the multistream mode is abandoned.

Also, the 'time' partitioning criterion does not reveal the absolute time of the service, and the receiver only knows that each IP stream is 'several hours' of ESG data relative to the reference time (e.g. when the IP stream is sent). You only know if you have Therefore, the receiver could know the absolute time of the services described by the ESG data only after knowing the partitioning criteria in the ESG initialization container of the notification carousel session and receiving and decoding all the ESG data through the multiple IP streams.

Accordingly, the present invention, which was devised to solve the problems of the prior art operating as described above, provides a method and apparatus for more efficiently transmitting ESG data using a multistream mode.

The present invention provides a method and apparatus for configuring a signaling field used to support a multistream mode in order to more efficiently transmit and decode ESG data using a multistream mode in a digital broadcasting system.

The present invention provides a method and apparatus for presenting various partitioning criteria and efficiently notifying the receiver of partitioning criteria for transmitting ESG data using a multistream mode in a digital broadcasting system.

According to a preferred embodiment of the present invention, in a method of transmitting an electronic service guide (ESG) in a digital broadcasting system,

Collecting ESG data to be transmitted;

Setting a number of Internet Protocol (IP) streams to transmit the ESG data to transmit the ESG data in a multistream mode;

Generating partitioning information including at least one partitioning criterion for partitioning the ESG data and at least one partitioning value for each partitioning criterion used for each of the IP streams; At least one of an ID, a service genre, an absolute time, a profiling type according to a service provider definition, and a session type, wherein the at least one partitioning value includes at least one of a start value and an end value according to the partitioning criterion. ,

And transmitting the ESG data partitioned according to the partitioning information through the IP streams.

According to a preferred embodiment of the present invention, in a method for receiving an electronic service guide (ESG) in a digital broadcasting system,

Receiving partitioning information including at least one partitioning criterion for partitioning the ESG data and at least one partitioning value for each partitioning criterion, for ESG data partitioned and transmitted in a plurality of IP streams; The partitioning criterion includes at least one of a service ID, a service genre, an absolute time, a profiling type according to a service provider's definition, and a session type, and the at least one partitioning value may be a start value according to the partitioning criterion. At least one of the ending values,

And selectively receiving the desired ESG data from the partitioning information through a specific IP stream carrying desired partitioned ESG data among the ESG data.

According to a preferred embodiment of the present invention, in an apparatus for transmitting an electronic service guide (ESG) in a digital broadcasting system,

An ESG generator for collecting ESG data and generating a plurality of ESG IP streams including the ESG data;

An IP encapsulator for receiving the ESG IP streams and data IP streams and encapsulating the transport stream into a transport stream;

A multiplexer for receiving and multiplexing a transport stream and a television (TV) transport stream from the IP encapsulator;

It consists of a modulator for modulating the multiplexed transport stream from the multiplexer and transmits through the antenna,

The ESG generator,

Setting the number of the ESG IP streams to transmit the ESG data in a multistream mode,

Generating partitioning information including at least one partitioning criterion for partitioning the ESG data and at least one partitioning value for each partitioning criterion used for each IP stream, wherein the partitioning criterion is a service ID. And at least one of a profiling type and a session type according to a service genre, an absolute time, a service provider definition, and the at least one partitioning value includes at least one of a start value and an end value according to the partitioning criterion.

The ESG data partitioned according to the partitioning information is output on the IP streams.

According to a preferred embodiment of the present invention, in an apparatus for receiving an electronic service guide (ESG) in a digital broadcasting system,

A demodulator for demodulating a signal received through an antenna and outputting demodulated data;

A demultiplexer for dividing the demodulated data into IP encapsulated packets and transport streams;

An IP decapsulator for decapsulating the IP encapsulated packets to output a plurality of ESG IP streams and service data IP streams;

An ESG processor for obtaining ESG data from the ESG IP streams;

And a data processor which receives the transport streams and the service data IP stream and processes them so that the user can recognize them.

The ESG processing unit,

Receiving partitioning information including at least one partitioning criterion for partitioning the ESG data and at least one partitioning value for each partitioning criterion, for the ESG data partitioned and transmitted in the ESG IP streams, The partitioning criterion includes a service ID, at least one of a service genre, an absolute time, a profiling type according to a service provider definition, and a session type, wherein the at least one partitioning value is one of a start value and an end value according to the partitioning criterion. At least one,

From the partitioning information, the desired ESG data may be selectively received through a specific IP stream carrying desired partitioned ESG data among the ESG data.

Hereinafter, with reference to the accompanying drawings will be described in detail the operating principle of the preferred embodiment of the present invention. In the following description of the present invention, detailed descriptions of well-known functions or configurations will be omitted if it is determined that the detailed description of the present invention may unnecessarily obscure the subject matter of the present invention. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

The main subject of the present invention to be described later is to transmit electronic service guide (ESG) data that provides information on each broadcasting service in a digital broadcasting system, and in particular, to efficiently transmit and receive ESG data in a multistream mode. will be.

In describing the present invention in detail, a digital video broadcasting (DVB) system will be used. However, the transmission and reception of ESG data, which is a basic object of the present invention, can be applied to other systems having similar technical backgrounds and channel shapes with a slight modification without departing from the scope of the present invention. It will be possible at the discretion of those with technical knowledge.

Specifically, the present invention proposes new partitioning criteria in transmitting ESG data in a multistream mode. In addition, in order to effectively use the partitioning criterion of the service ID, the service ID list is transmitted to the terminal, that is, the receiver. The receiver uses the description field for the new partitioning criteria to request user input before receiving ESG data transmitted in the multistream, and optionally decodes the ESG data according to the request. The new partitioning criteria described below may be used independently or in combination.

The first embodiment proposed by the present invention proposes new partitioning criteria as shown in Table 3a to solve the above-mentioned problems of the prior art.

Value Encoding Meaning 0x00 0x0101 (unsigned short) The number of hours for which the fragments are valid. This may be used to split the ESG into various schedule depths. 0x01 0x0000 (string) The URI of the Service fragments ServiceID. This may be used to carry all fragments relevants to a particular service. 0x10 0x0000 (string) The ServiceGenre value. 0x20 0x0400 (DateTime) The date and time value for which the fragments are valid. 0x30 ~ 0x0101 (unsigned short) The Profiling Type. 0x40 ~ 0x0101 (unsigned short) The Session Type. 0x50 0x0101 (unsigned short) Notification

The first is 'ServiceGenre' shown in <Table 3a>, and its encoding type is 'string'. Although the field_identifier of 'ServiceGenre' is indicated as '0x10', the value may be changed. 'ServiceGenre' follows the field format and value of the 'ServiceGenre' element in the service fragment of the ESG. For more details, follow the ESG specification (ETSI TS 102 471). Here, when the field_identifier of the partitioning criterion indicates 'ServiceGenre', it means that service related information corresponding to a specific service genre is transmitted through a specific IP stream. When the partitioning criterion is applied, start_field_value and end_field_value become the same value.

The second new partitioning criterion is 'DateTime' shown in <Table 3a>, and its encoding type follows the 'Modified Julian Date and Miliseconds' format defined in the DVB-H ESG specification (ETSI TS 102 471). A time stamp having a format of 'unsigned long' may be used for the 'DateTime'. A coding type usable for the time stamp may be selected from Table 8.4. Of the DVB-H ESG specification (ETSI TS 102 471), and the following table shows the coding type. By using the partitioning criterion of 'DateTime', the time information of broadcast services can be represented more efficiently than the conventional 'time', which indicates only a relative time, that is, one hour, two hours, and the like. The second feature of the new partitioning criterion is that it uses absolute time, so it is also called the "Absolute Time" criterion.

Table of Coding Types field_encoding Description Encoding Size in bits 0x0000 string type Null-terminated string variable (8+) 0x0001-0x00FF Reserved for custom string types 0x0100 signed short two's complement-Big-Endian 16 0x0101 unsigned short unsigned binary-Big-Endian 16 0x0102-0x01FF Reserved for custom 2types 16 0x0200 signed long two's complement-Big-Endian 32 0x0201 unsigned long unsigned binary-Big-Endian 32 0x0202 variable length signed integer one bit to indicate sign (0: positive, 1: negative), followed by abs (value) using vluimsbf5. variable (6+) 0x0203 variable length unsigned integer vluimsbf8 variable (8+) 0x0204 boolean 0: False 1: True 8 0x0205 signed byte two's complement 8 0x0206 unsigned byte unsigned binary 8 0x0207-0x02FF Reserved for custom integer types 0x0300 signed float IEEE standard 754-1985 [16] Big-Endian 32 0x0301 Reserved 0x0302 signed double IEEE standard 754-1985 [16] Big-Endian 64 0x0303-0x03FF Reserved for custom rational types 0x0400 dateTime Modified Julian Date and Milliseconds (TVA BiM codec, clause 4.4.2.4.2 in [21]) 64 0x0401 date Modified Julian Date (TVA BiM codec, clause 4.4.2.4.3 in [21]) 32 0x0402-0x04FF Reserved for custom binary fragments 0x0500-0xFFFF Reserved for future use

The third new partitioning criterion is 'Profiling Type' shown in Table 3a, and specific values of 'Profiling Type' are defined in Table 3c below. That is, it may be defined as 'basic profile', 'enhanced profile', etc. according to the encoding value. Here, 'basic profile' is the most basic ESG information provided to users in ESG, that is, accessing information such as service ID (ServiceID) and IP address (IP address), and is mainly provided as 'Mandatory' in ESG. This information corresponds to. In addition, although not 'mandatory' such as 'free-to-air', the main information that a user basically wants to know first corresponds to the basic ESG information, and the specific definition thereof is determined according to the operator's definition. The enhanced profile is the rest of the ESG data in addition to the basic profile. By introducing the profiling concept into the ESG transmission, the receiver can receive the ESG data first through the 'basic profiling' IP session and quickly show the basic ESG information to the user.

'Profiling Type' Values Value Meaning 0x30 Basic profile 0x31 Enhanced profile 0x32 Reserved

In the general partitioning criterion, a range of ESG data transmitted according to each IP stream is represented using a 'start_field_value' and an 'end_field_value'. For example, when 'Time' is used as a partitioning criterion, when 'start_field_value' = 1 and 'end_field_value' = 2 in the first IP stream, ESG data corresponding to 1 hour to 2 hours is transmitted to the first IP stream. It means. However, these range values cannot be used when the partitioning criterion is 'Profile Type'. Therefore, 'start_field_value' is not used and 'end_field_value' is set to one of the values in Table 3c below to indicate the profile type. That is, when the partitioning criterion is 'Profile Type', the receiver checks the 'end_field_value' to identify the corresponding profile type.

A fourth new partitioning criterion is 'Session Type', and examples of each specific type value are disclosed in Table 3d below. That is, if the partitioning criterion is 'Session Type' and the type value is '0x00', for example, SDP information about ESG data is transmitted to the corresponding IP stream. When 'Session Type' is used as a partitioning criterion, since each range does not overlap, 'start_field_value' is not used, and 'end_field_value' is set to one of the values in Table 3d to indicate the corresponding session type. That is, when the partitioning criterion is 'Session Type', the receiver checks the 'end_field_value' to confirm the corresponding session type.

'Session Type' shown in the example of Table 3d below may indicate whether the message is a notification message for instructing the UE of changes in the broadcast service and the system in addition to the SDP. As such, the notification message indicated as 'Session Type' corresponds to a general notification message that can be received by all users. That is, it is possible to deliver from the transmitter the channel information and the actual general notification message on which IP stream the general notification message is transmitted using the multi-stream mode of the ESG.

Session type Value Meaning 0x40 SDP 0x41 Notification 0x42 Reserved

As another example, as shown in '0x50' of Table 3a, the transmission of the notification message may be indicated in the same manner as the partitioning criteria. In other words, the transmission method of the notification message may be displayed as one of the session types as shown in Table 3d or as one of the partitioning criteria as shown in Table 3a.

Next, operations of the transmitting side and the receiving side and related additional information according to the first embodiment of the present invention will be described.

According to the first embodiment of the present invention, when 'DateTime' or 'ServiceGenre' is used as a partitioning criterion, an operation of a receiver using the corresponding information is changed. When the partitioning criteria proposed in the present invention are applied, it is possible to partition the ESG data into 'July 12, 2006 ESG', 'July 3rd ESG', or 'Sport ESG' and 'News ESG'. The partitioned information becomes useful information to the user as well as the receiver. If the original ESG is one week long, if it is divided into several IP streams per day or divided into several IP streams in 'ServiceGenre', the transmitter determines that the receiver sends ESG partitions of the IP streams. Before receiving, the partition information is informed to the user, and the receiver can perform operations such as first receiving or selectively receiving only the desired ESG partition according to the partition information. In this case, there are gains in terms of time, receiver processing, and power for the reception of the ESG.

In addition, when the partitioned ESG is regarded as a plurality of ESGs and sent, the new ESG notification carousel information has to be set and transmitted for each ESG session. Accordingly, the present invention defines a description field for additionally explaining the partitioning criteria to the user. Basically, information provided on a partitioning basis may be processed and informed to the user. However, if there is a description field, information of a type more suitable for the user may be provided, and thus the description field is optional.

When the description field is used, the terminal may receive the corresponding information through the description field and may inquire a user as to which ESG data to receive first. In another embodiment, the terminal applies a new partitioning criterion without querying the user.

The syntax of the party declaration field including a description field for additionally informing partitioning criteria according to the first embodiment of the present invention is shown in Table 4 below.

Syntax No. of Bits Mnemonic ESG Session Partition Declaration { num_fields 8 uimsbf Reserved 8 bslbf for (k = 0; k <num_fields; k ++) { field_identifier [k] 16 bslbf field_encoding [k] 16 bslbf field_length [k] 8 uimsbf field_overlap [k] One bslbf reserved 7 bslbf } N_o_IPStreams 8 IPVersion6 One bslbf Reserved 7 bslbf for (i = 0; i <n_o_IPStreams; i ++) { IPStreamID 8 uimsbf if (IPVersion6) { ESGSourceAddress [i] 128 bslbf IPAddress [i] 128 bslbf } else { ESGSourceAddress [i] 32 bslbf IPAddress [i] 32 bslbf } Port [i] 16 uimsbf SessionID [i] 16 uimsbf Description [i] for (k = 0; k <num_fields; k ++) {         if (field_length [k] == 0) {             length [i] [k] 8+ vluimsbf8         } if (overlapping) { start_field_value [i] [k] bslbf } end_field_value [i] [k] bslbf          nextByteBoundary () } }

Referring to Table 4, as long as the range values of the partitioning criteria are not overlapped (that is, when overlapping = FALSE), the two partitioning values are 'start_field_value' and 'end_field_value' (end values). Only one of them is used. For example, 'end_field_value' is set as one of partitioning values according to a corresponding partitioning criterion. Specifically, the above-mentioned partitioning values for 'Profiling Type' and 'Session Type' are one of 'start_field_value' and 'end_field_value', that is, 'end_field_value'.

5 (consisting of FIGS. 5A and 5B) is a flowchart describing the operation of the transmitter according to the first embodiment of the present invention.

Referring to FIG. 5, the transmitter collects ESG data including ESG fragments to transmit (502) and determines whether to use the multistream mode in transmitting the ESG data (504). If not, the transmitter encodes the collected ESG data according to each data type and proceeds to step 534, and sets the parameters to be transmitted when using the multistream mode (506). When used, the necessary parameters are the number of partitioning criteria used (num_field = N), the overlapping parameter (field_overlap), the partitioning identifier of the partitioning criteria used (field_identifier), the encoding parameter (field_encoding) and the partitioning length (field_length). The detailed description of the parameters is as described in FIG. 3.

After setting the parameters, the transmitter sets the number of IP streams to transmit ESG (n_o_IPStream = P). (510) After setting the number of IP streams, the transmitter determines whether partitioning criteria are used in each IP stream and The partitioning criteria used are determined and inserted into the field_identifier [i] field of the partition declaration field, and a description field describing the partitioning criteria to the user is inserted into the partition declaration field of the ESG initialization container.

Subsequently, in order to allocate ESG fragments to each IP stream, IP_stream_number, which is an index of an IP stream to be set, and field_number, which is an index of a partitioning criterion to be set, are initialized to 0 (514). It is determined whether the number of IP streams is smaller than P (516). If IP_stream_number is smaller than P, the transmitter determines whether field_number is smaller than N, which is the number of partitioning criteria.

If the field_number is less than N, the transmitter determines whether a partitioning criterion corresponding to the field_number is used in the current IP stream corresponding to the IP_stream_number. (522) If the partitioning criterion is not used in the current IP stream, the transmitter next determines In order to determine the partitioning criterion, the field_number is increased by one (530), and the process returns to step 518 to determine again whether the field_number is smaller than N. On the other hand, if the partitioning criterion is used in the current IP stream, the transmitter determines whether the partitioning criterion to be used in the current IP stream is overlapped according to the overlapping parameter (524), and if the partitioning criterion is not overlapped, Only the end value (end_field_value) is set (528), and if overlapped, both the start value (start_field_value) and the end value (end_field_value) for the partitioning criterion are set (526).

The start value and the end value are partitioning values for the partitioning criterion. For example, when the partitioning identifier is set to 'time', the start value and end value indicate a reference time at which fragments in each IP stream are partitioned. That is, fragments from the time indicated by the start value to the time indicated by the end value become ESG data transmitted in the current IP stream.

As another example, when the partitioning identifier is set to 'DateTime' proposed in the present invention, the start value and the end value indicate the absolute time when the IP streams are partitioned. The difference between the 'DateTime' and the existing partitioning criterion 'Time' is that the start value and the end value are expressed in absolute time so that the receiver knows at what time the ESG data is service information without decoding the ESG data. Is there. As another example, when the partitioning identifier is set to 'ServieGenre' proposed in the present invention, the start value and the end value are values indicating the same specific service genre, and ESG data transmitted through the corresponding IP stream is assigned to the specific service genre. Corresponds to the belonging service information.

If the partitioning criterion is not overlapped, the start value is equal to " end value of previous IP stream + 1 ", so no start value is declared. After setting the start value and / or end value, the transmitter increases the field_number by one to set the start value and the end value for the next partitioning criterion (530) and determines whether the field_number is smaller than N which is num_field (step 518). Return to.

If the determination result indicates that field_number is not smaller than N (num_field), since the start and end values for the partitioning criteria used in the current IP stream are finished, the transmitter starts and ends the partitioning criteria used in the next IP stream. In order to set the value, IP_stream_number is increased by one (520), and the process returns to step 516 to determine whether the IP_stream_number is smaller than P (n_o_IPstream).

If the IP_stream_number is not smaller than P (n_o_IPstream) as a result of the determination, all the settings for the IP streams to be used are completed, and the transmitter encodes a partition declaration field in the ESG initialization container to include the set values. Collects all encoded ESG data including an ESG initialization container including a declaration field (534), and the collected ESG data is transmitted to the receiver via the P IP streams (536). The IP streams are partitioned according to the partition's partitioning criteria and partitioning values.

6 is a flowchart illustrating the operation of a receiver according to the first embodiment of the present invention. Here, the operation of querying a user for receiving desired ESG data is omitted. In particular, 'Session Type' and 'Profile Type', which are partitioning criteria for which start_field_value is not used, are illustrated in more detail.

Referring to FIG. 6, a receiver first receives ESG bootstrap data through an ESG bootstrap session in order to decode ESG data. (602) The ESG bootstrap session is information on an IP stream through which a receiver transmits ESG data. The basic information necessary to obtain is transmitted. The IP address of the ESG bootstrap session is always fixed and the receiver already knows the fixed IP address. Therefore, when the receiver wants to decode the ESG, the receiver first receives the ESG bootstrap data including the basic information through the ESG bootstrap session.

The receiver determines whether the ESG is transmitted through the multistream mode or the singlestream mode with reference to the ESG bootstrap data. (604) When the singlestream mode is used, the receiver determines whether an ESG is generated from the ESG bootstrap data. An IP address of the transmitted IP stream is obtained (606), and ESG data is received and decoded through the IP stream using the obtained IP address (608).

When the multistream mode is used, the receiver obtains an IP address of an ESG notification carousel session from the ESG bootstrap data and receives notification carousel information including an ESG initialization container through the ESG notification carousel session (610). The announcement carousel session is a session for transmitting structure information on a plurality of IP streams through which the ESG is transmitted when the ESG is transmitted using the multistream mode, and provides structure information on the IP streams through the ESG notification carousel session. The containing ESG initialization container is transmitted.

The receiver finds a partition declaration field from an ESG initialization container received through the ESG notification carousel session. (612) If the partition declaration field is not found in the ESG initialization container, the receiver according to the data type indicated by the ESG notification carousel information. The ESG data is received and processed accordingly. (614) When the partition declaration field is found in the ESG initialization container, the receiver acquires the number P of IP streams used to transmit the ESG (616). When the number P of IP streams is obtained, it is determined whether partitioning is used in each IP stream with reference to the partition declaration field.

After determining whether to use the partitioning, parameters necessary for using the multistream mode are obtained from the partition declaration field. (620) In case of using the multistreaming mode, necessary parameters include the number of partitioning criteria (num_fields = N) and overlapping. Parameter, each partitioning identifier, encoding parameter, and partitioning length. From the parameters, the receiver knows partitioning information indicating which partitioning criterion was used for ESG data transmitted in each IP stream, and in which IP stream ESG fragments corresponding to each partitioning criterion are transmitted (622). The receiver checks whether the partitioning criterion used for each IP stream is 'Profile Type' or 'Session Type' from the partitioning information. (624) If 'Profile Type' or 'Session Type' is not used as the partitioning reference. In the case of at least one first IP stream, the ESG data of the first IP stream is processed (received and decoded) according to a corresponding partitioning criterion.

In the case of at least one second IP stream in which 'Profile Type' is used as a partitioning criterion, 'start_field_value' is not used because the partition range is not overlapped (when oveelapping = FALSE in <Table 4>). Therefore, the receiver checks 'end_field_value' for the 'Profile Type', recognizes one of the profile type values shown in Table 3c, and proceeds to step 630. That is, the receiver knows in advance that 'end_field_value' for the second IP stream in which 'Profile Type' is used as the partitioning criterion indicates a profile type value. The receiver recognizes information on a specific IP stream carrying basic ESG information on a broadcast service according to the profile type value, and obtains the basic ESG information in advance through the specific IP stream to prompt the user for the basic ESG information. (630)

 In the case of at least one third IP stream in which 'Session Type' is used as a partitioning criterion, since the partition range is not overlapped (when overlapping = FALSE in <Table 4>), 'start_field_value' is not used. Accordingly, the receiver checks 'end_field_value' for the 'Session Type', recognizes one of the session type values in Table 3d, and proceeds to step 630. If the session type value indicates 'SDP', the receiver may know that the second stream transmits SDP information for ESG data. Although not shown in detail, if the 'Session Type' and the 'DateTime' are used as partitioning criteria and the 'Session Type' represents the SDP, the receiver may display a specific time indicated by the 'DateTime' (for example, August 16, 2006). ), It can be seen that the SDP is applied. In addition, when a 'Session Type' for a specific IP stream indicates a notification message, the receiver recognizes that a general notification message is transmitted through the IP stream, and receives a general notification message through the IP stream.

If the partitioning criteria used for each IP stream and the corresponding partitioning value (s) are confirmed, the receiver identifies the IP stream carrying the desired ESG data and selectively receives the desired ESG data through the IP stream (630). In this case, the receiver may use a description field for a partitioning criterion selectively provided through a partition declaration field or may query a user whether to selectively receive ESG data transmitted through a plurality of IP streams using the partitioning information. For example, the receiver selectively receives 'one-week' ESG data or 'sport' ESG data according to a user input. Alternatively, it is possible to first receive and decode an IP stream carrying ESG data of a specific service or a specific service genre according to a user's preference stored in the receiver in advance without directly requesting an input from the user. When the user selects a specific part of the ESG stream at the request of the receiver, the receiver preferentially receives and decodes the desired ESG data according to the user's selection.

Next, a second embodiment of the present invention will be described.

In the second embodiment of the present invention, in order to apply the 'service ID' as the partitioning criterion, a more accurate operation between the receiver and the service provider is defined. In order to apply the partitioning criterion of the 'service ID', the receiver must know the 'service ID' between the 'start_field_value' and the 'end_field_value' in order to determine how information related to each service is transmitted for each IP stream. Since the 'service ID' is transmitted as a string value, in order to group all service IDs of the ESG into several IP streams, the string values of each 'service ID' must be converted into integer values.

Even if the 'service ID' is converted to an integer value, the receiver must have a list of service IDs before receiving ESG data in order to know the 'service ID' values between 'start_field_value' and 'end_field_value'. The receiver may use the service ID list to know which IP streams the ESG data for a specific range of services and grouping of 'service ID' values are transmitted.

To this end, in the second embodiment of the present invention, a service ID list (ServiceID List) is added to the ESG initialization container of the ESG notification carousel session shown in FIG. 2 and transmitted.

7 shows a transmission format of a service ID list according to the second embodiment of the present invention.

Referring to FIG. 7, the ESG initialization container 704 of the ESG notification carousel session 702 further includes a service ID list 706 as compared to FIG. 2. The ServiceIDs and their formats used in the ServiceID List 706 follow the values and formats used in the ESG and partitioning criteria. Of course, the location of the service ID list 706 shown in FIG. 7 may be changed in the ESG initialization container 704.

8 (consisting of FIGS. 8A and 8B) is a flowchart describing the operation of the transmitter according to the second embodiment of the present invention.

Referring to FIG. 8, the transmitter collects 802 ESG data including ESG fragments to transmit and determines whether to use the multistream mode in transmitting the ESG data (804). If not, the transmitter encodes the collected ESG data according to each data type, and proceeds to step 836, and sets the parameters to be transmitted when using the multistream mode (806). When used, the necessary parameters are the number of partitioning criteria used (num_field = N), the overlapping parameter, the partitioning identifier (field_identifier) of the partitioning criteria used, the encoding parameter (field_encoding) and the partitioning length (field_length). The detailed description of the parameters is as described in FIG. 3.

After setting the parameters, the transmitter sets the number of IP streams to transmit ESG (n_o_IPStream = P). (810) After setting the number of IP streams, whether partitioning criteria are used in each IP stream and whether The partitioning criterion is determined, and a description field indicating the determined partitioning criterion is inserted into the partition declaration field of the ESG initialization container.

Subsequently, in order to allocate ESG fragments to each IP stream, IP_stream_number, which is an index of an IP stream to be set, and field_number, which is an index of a partitioning criterion to be set, are initialized to 0 (814). It is determined whether the number of IP streams is smaller than P (816). If IP_stream_number is smaller than P, the transmitter determines whether field_number is smaller than N, which is the number of partitioning criteria.

If field_number is less than N, the transmitter determines whether a partitioning criterion corresponding to the field_number is used in the current IP stream corresponding to the IP_stream_number. (822) If the partitioning criterion is not used in the current stream, the transmitter next partitions. The field_number is increased by one to determine the reference (830), and the process returns to step 818 to determine whether the field_number is smaller than N. On the other hand, when the partitioning criterion is used in the current IP stream, the transmitter determines whether the partitioning criterion to be used in the current IP stream is overlapped according to an overlapping parameter (824), and if the partitioning criterion is not overlapped, the partitioning criterion Set only the end value (end_field_value) for (828) and if overlapping, set both the start value (start_field_value) and the end value (end_field_value) (826).

The start value and the end value are partitioning values for the partitioning criterion. For example, when the partitioning identifier is set to 'time', the start value and end value indicate a reference time at which fragments in each IP stream are partitioned. That is, fragments from the time indicated by the start value to the time indicated by the end value become ESG data transmitted in the current IP stream. As another example, when the partitioning identifier is set to 'service ID', the start value and end value indicate service IDs of fragments in each IP stream. That is, ESG fragments from the service ID indicated by the start value to the service ID indicated by the end value become ESG data transmitted in the current IP stream.

As another example, when the partitioning identifier is set to 'DateTime' proposed in the present invention, the start value and the end value inform the absolute time partitioned for each IP stream. The difference between the 'DateTime' and the existing partitioning criterion 'Time' is that the start value and the end value are expressed in absolute time so that the receiver knows at what time the ESG data is service information without decoding the ESG data. Is there. As another example, when the partitioning identifier is set to 'ServieGenre' proposed in the present invention, the start value and the end value are values indicating the same specific service genre, and ESG data transmitted through the corresponding IP stream is assigned to the specific service genre. Corresponds to the belonging service information.

If the partitioning criterion is not overlapped, the start value is equal to " end value of previous IP stream + 1 ", so no start value is declared. After setting the start value and / or end value, the transmitter increases the field_number by one to set the start value and the end value for the next partitioning criterion (830) and returns to step 818 to determine whether the field_number is less than N. do.

If the determination result indicates that field_number is not smaller than N (num_field), since the start and end values for the partitioning criteria used in the current IP stream are finished, the transmitter starts and ends the partitioning criteria used in the next IP stream. In order to set the value, the IP_stream_number is increased by one (820) and the process returns to step 816 to determine again whether the IP_stream_number is smaller than P (n_o_IPstream).

If the IP_stream_number is not smaller than P (n_o_IPstream) as a result of the determination, all settings for the IP streams to be used are completed, and the transmitter encodes the partition declaration field in the ESG initialization container to include the set values. According to a second embodiment, a service ID list including service IDs of services related to corresponding ESG data is inserted into the ESG initialization container. (834) The transmitter inserts an ESG initialization container including the partition declaration field and a service ID list. In addition, all the encoded ESG data is collected (836), and the collected ESG data is transmitted to the receiver through the P IP streams (838). The ESG data is determined according to partitioning criteria and partitioning values of the respective IP streams. Partitioned and loaded onto the IP streams.

9 is a flowchart describing the operation of a receiver according to the second embodiment of the present invention.

Referring to FIG. 9, a receiver first receives ESG bootstrap data through an ESG bootstrap session in order to decode ESG data. (902) The ESG bootstrap session is information on an IP stream through which the receiver transmits ESG data. The basic information necessary to obtain is transmitted. The IP address of the ESG bootstrap session is always fixed and the receiver already knows the fixed IP address. Therefore, when the receiver wants to decode the ESG, the receiver first receives the ESG bootstrap data including the basic information through the ESG bootstrap session.

The receiver determines whether the ESG is transmitted through the multistream mode or the singlestream mode with reference to the ESG bootstrap data. (904) When the singlestream mode is used, the receiver determines that the ESG is determined from the ESG bootstrap data. An IP address of the transmitted IP stream is obtained (906), and ESG data is received and decoded through the IP stream using the obtained IP address (908).

When the multistream mode is used, the receiver obtains an IP address of an ESG notification carousel session from the ESG bootstrap data and receives notification carousel information including an ESG initialization container through the ESG notification carousel session (910). The announcement carousel session is a session for transmitting structure information on a plurality of IP streams through which the ESG is transmitted when the ESG is transmitted using the multistream mode, and provides structure information on the IP streams through the ESG notification carousel session. The containing ESG initialization container is transmitted.

The receiver finds a partition declaration field from the ESG initialization container received through the ESG notification carousel session. (912) If the partition declaration field is not found in the ESG initialization container, the receiver according to the data type indicated by the ESG notification carousel information. The ESG data is received and processed accordingly. (914) When the partition declaration field is found in the ESG initialization container, the receiver acquires the number P of IP streams used to transmit the ESG (916). When the number P of IP streams is obtained, it is determined whether partitioning is used in each IP stream with reference to the partition declaration field (918).

After determining whether to use the partitioning, parameters necessary for using the multistream mode are obtained from the partition declaration field. (920) Parameters required for using the multistream mode include the partitioning reference number (num_fields = N), Overlapping parameters, each partitioning identifier, coding parameters, and partitioning length. From the parameters, the receiver knows partitioning information indicating which partitioning criterion is used for ESG data transmitted in each IP stream, and in which IP stream ESG fragments corresponding to each partitioning criterion are transmitted (922). In addition, the receiver obtains a service ID list from the ESG initialization container.

The receiver determines the partitioning criterion used for each IP stream using the partitioning information (926). In particular, in case of at least one first IP stream to which the partitioning criterion of 'service ID' is applied, the receiver refers to the service ID list. By checking the services having service IDs existing between the start_field_value and the end_field_value for the 'service ID', it is determined to which IP streams the services are included and transmitted. The receiver selectively receives only a specific IP stream including specific service information and decodes desired ESG data according to the receiver's configuration or user input and selection.

A block diagram showing the structure of a transmitter and a receiver applied to both the first and second embodiments of the present invention will be described in common as follows.

10 is a view schematically showing the structure of a transmitter according to a preferred embodiment of the present invention. Here, as an example, the structure of the transmitter applied to the DVB system is shown.

Referring to FIG. 10, a plurality of MPEG 2 streams 1002 and 1004 which are TV streams are input to a DVB transmitter, and at least one data IP stream 1006 is input in addition to the MPEG 2 streams 1002 and 1004. . The data IP stream 1006 includes IP based service data. The ESG data 1008 generated for transmitting the service information for the MPEG 2 TV streams 1002 and 1004 and the data IP stream 1006 is also input to a DVB transmitter in the form of IP stream (s).

The ESG data is generated by the ESG generator 1016 according to one of the above-described embodiments of the present invention, and has a form of one IP stream or one or more IP streams. The IP streams 1006 and 1008 are encapsulated in a DVB IP encapsulator 1010 into an MPEG 2 transport stream (TS) by the multiplexer 1012 along with the other MPEG 2 streams 1002 and 1004 which are TV streams. Multiplexed. The multiplexed TS is modulated into Orthogonal Frequency Division Multiplex (OFDM) symbols in the DVB modulator 1014 and transmitted through an antenna.

11 is a view schematically showing the structure of a receiver according to a preferred embodiment of the present invention. Here, as an example, the structure of a receiver applied to a DVB system is shown.

Referring to FIG. 11, a DVB receiver receives a radio signal through an antenna, and the radio signal is recovered through an OFDM demodulation process in the DVB demodulator 1102. The demodulated data is divided into IP-encapsulated packets and MPEG 2 TS packets 1110 by the demultiplexer 1106. The TS packets 1110 are delivered to the data processor 1116 of the broadcast receiver 1112 and undergo a series of processes necessary to show a corresponding service to a user.

The IP encapsulated packets are recovered back to IP streams 1108 at IP decapsulator 1106 and the IP streams 1108 are divided into at least one ESG IP stream and at least one data IP stream. The data IP stream is input to the data processor 1116 in the same manner as the TS packets. The ESG IP stream is input to the ESG processor 1114. The ESG processing unit 1114 analyzes ESG data from the ESG stream. In this case, when the ESG data is transmitted in the multistream mode, the ESG processor 1114 receives and analyzes necessary parameters from the ESG data. The ESG data is optionally decoded at the request of the user through the user interface 1118 as needed, and the decoded ESG data is output or stored through the user interface 1118.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by those equivalent to the scope of the claims.

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 has the effect of allowing the user to easily select and receive the necessary ESG data by efficiently grouping the ESG information in transmitting the electronic service guide (ESG) using the multi-stream mode in the digital broadcasting system. .

Claims (34)

In a transmission method of an electronic service guide (ESG) in a digital broadcasting system, Collecting ESG data to be transmitted; Setting a number of Internet Protocol (IP) streams to transmit the ESG data to transmit the ESG data in a multistream mode; Generating partitioning information including at least one partitioning criterion for partitioning the ESG data and at least one partitioning value for each partitioning criterion used for each of the IP streams; At least one of an ID, a service genre, an absolute time, a profiling type according to a service provider definition, and a session type, wherein the at least one partitioning value includes at least one of a start value and an end value according to the partitioning criterion. , Transmitting the partitioned ESG data according to the partitioning information through the IP streams. The method of claim 1, wherein the partitioning criterion indicating the service genre is: And a field type and a value identical to a service genre element included in a service fragment constituting the ESG data. The method of claim 1, wherein the transmitting of the ESG data comprises: And including the ESG data corresponding to the partitioning criterion of the IP stream and the at least one partitioning value in the respective IP streams. 2. The method of claim 1, further comprising including a list of service IDs for use in applying partitioning criteria of the service ID to the partitioning information. The method of claim 1, wherein the partitioning information, ESG transmission method characterized in that it is transmitted through the partition declaration field of the ESG initialization container that carries the structure information for the ESG data. The method of claim 1, wherein the partitioning information, And a description field describing the at least one partitioning criterion used for the IP streams. The method of claim 1, wherein the partitioning information, And one of the partitioning criteria, instructs transmission of a notification message indicating a change in a service and a system. The method of claim 1, wherein the partitioning value for the profiling type and the session type has any one of the start value and the end value. The method of claim 8, wherein the partitioning value for the session type is: One of the session types, instructing transmission of a notification message indicating a change in a service and a system. In the method of receiving an electronic service guide (ESG) in a digital broadcasting system, Receiving partitioning information including at least one partitioning criterion for partitioning the ESG data and at least one partitioning value for each partitioning criterion, for ESG data partitioned and transmitted in a plurality of IP streams; The partitioning criterion includes at least one of a service ID, a service genre, an absolute time, a profiling type according to a service provider's definition, and a session type, and the at least one partitioning value includes a start value and an end value according to the partitioning criterion. At least one of And selectively receiving the desired ESG data from the partitioning information through a specific IP stream carrying desired partitioned ESG data among the ESG data. The method of claim 10, wherein the partitioning criterion indicating the service genre is: And a field type and a value identical to a service genre element included in a service fragment constituting the ESG data. The method of claim 10, further comprising: obtaining a service ID list for use in a first IP stream to which the partitioning criterion of the service ID is applied, from the partitioning information; And identifying services included in the first IP stream by referring to the service ID list and a start value and an end value of partitioning criteria of the first IP stream. The method of claim 10, wherein the partitioning information, ESG receiving method characterized in that it is received through the partition declaration field of the ESG initialization container that carries the structure information for the ESG data. The method of claim 10, wherein the partitioning information, And a description field describing the at least one partitioning criterion used for the IP streams. The method of claim 10, wherein the partitioning information, As one of the partitioning criteria, instructing transmission of a notification message indicating a change in a service and a system. The method of claim 10, wherein the partitioning value for the profiling type and the session type has any one of the start value and the end value. The method of claim 16, wherein the partitioning value for the session type is: One of the session types, the ESG receiving method characterized by instructing the transmission of a notification message indicating a change in service and system. In the transmitting device of the electronic service guide (ESG) in a digital broadcasting system, An ESG generator for collecting ESG data and generating a plurality of ESG IP streams including the ESG data; An IP encapsulator for receiving the ESG IP streams and data IP streams and encapsulating the transport stream into a transport stream; A multiplexer for receiving and multiplexing a transport stream and a television (TV) transport stream from the IP encapsulator; It consists of a modulator for modulating the multiplexed transport stream from the multiplexer and transmits through the antenna, The ESG generator, Setting the number of the ESG IP streams to transmit the ESG data in a multistream mode, Generating partitioning information including at least one partitioning criterion for partitioning the ESG data and at least one partitioning value for each partitioning criterion used for each IP stream, wherein the partitioning criterion is a service ID and At least one of a profiling type and a session type according to a service genre, an absolute time, a service provider definition, and the at least one partitioning value includes at least one of a start value and an end value according to the partitioning criterion, And outputting the partitioned ESG data on the IP streams according to the partitioning information. The method of claim 18, wherein the partitioning criterion indicating the service genre is: And a field type and a value identical to a service genre element included in a service fragment constituting the ESG data. The method of claim 18, wherein the ESG generator, And the ESG data corresponding to the partitioning criterion of the IP streams and the at least one partitioning value in the respective IP streams. The method of claim 18, wherein the ESG generator, And a service ID list for use in applying the partitioning criterion of the service ID to the partitioning information. The method of claim 18, wherein the partitioning information, And an ESG transmitting apparatus transmitted through a partition declaration field of an ESG initialization container that carries structure information about the ESG data. The method of claim 18, wherein the partitioning information, And a description field describing the at least one partitioning criterion used for the IP streams. The method of claim 18, wherein the partitioning information, And one of the partitioning criteria, instructs transmission of a notification message indicating a change in a service and a system. The apparatus of claim 18, wherein the partitioning value for the profiling type and the session type has any one of the start value and the end value. The method of claim 25, wherein the partitioning value for the session type is: And one of the session types, instructs transmission of a notification message indicating a change in a service and a system. In the receiving apparatus of the electronic service guide (ESG) in a digital broadcasting system, A demodulator for demodulating a signal received through an antenna and outputting demodulated data; A demultiplexer for dividing the demodulated data into IP encapsulated packets and transport streams; An IP decapsulator for decapsulating the IP encapsulated packets to output a plurality of ESG IP streams and service data IP streams; An ESG processor for obtaining ESG data from the ESG IP streams; And a data processor which receives the transport streams and the service data IP stream and processes them so that the user can recognize them. The ESG processing unit, Receiving partitioning information including at least one partitioning criterion for partitioning the ESG data and at least one partitioning value for each partitioning criterion, for the ESG data partitioned and transmitted in the ESG IP streams, The partitioning criterion includes a service ID, at least one of a service genre, an absolute time, a profiling type according to a service provider definition, and a session type, wherein the at least one partitioning value is one of a start value and an end value according to the partitioning criterion. At least one, And receiving the desired ESG data selectively from the partitioning information through a specific IP stream carrying desired partitioned ESG data among the ESG data. The method of claim 27, wherein the partitioning criterion indicating the service genre is: ESG receiving apparatus having the same field type and value as the service genre element included in the service fragment constituting the ESG data. The method of claim 27, wherein the ESG processing unit, Obtaining, from the partitioning information, a service ID list for use in a first IP stream to which the partitioning criterion of the service ID is applied; And a service included in the first IP stream by referring to the service ID list and the start value and the end value of the partitioning criterion of the first IP stream. The method of claim 27, wherein the partitioning information, ESG receiving device characterized in that it is received through the partition declaration field of the ESG initialization container for carrying the structure information for the ESG data. The method of claim 27, wherein the partitioning information, And a description field describing the at least one partitioning criterion used for the IP streams. The method of claim 27, wherein the partitioning information, One of the partitioning criteria, ESG receiving apparatus characterized by instructing the transmission of a notification message indicating a change in service and system. 28. The apparatus of claim 27, wherein the partitioning value for the profiling type and the session type has any one of the start value and the end value. 34. The method of claim 33, wherein the partitioning value for the session type is: One of the session types, the ESG receiving apparatus characterized by instructing the transmission of a notification message indicating a change in service and system.

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