KR20070022620A - PMCP Extension Metadata, Data Stream Generating Device, Digital Data Broadcasting Emission System and Digital Data Brocasting Emission Method thereof - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a PMCP Extended Metadata Structure.

2. The technical problem to be solved by the invention

The present invention extends existing PMCP metadata to ensure interoperability between a data server, which is a device added to a digital broadcast transmission system, and devices of a conventional digital broadcast transmission system to transmit data broadcasts. It is an object of the present invention to provide a PMCP extended metadata structure, a data stream generating apparatus, a digital data broadcasting transmission system, and a digital data broadcasting transmission method using the same.

3. Summary of Solution to Invention

The present invention relates to PMCP extended metadata that extends PMCP (Programming Metadata Communication Protocol) metadata, comprising: channel metadata for providing system information of data events constituting a data broadcast program; identification information and organization information of the data event. Providing PSIP data event metadata; And ACAP data service metadata for providing encoding information including signaling information and transmission protocol information of data broadcasting content corresponding to the data event.

4. Important uses of the invention

The present invention is used for digital data broadcasting transmission system.

Digital data broadcasting, PMCT, metadata, transmission system

Description

PMCP Extension Metadata, Data Stream Generation Device, Digital Data Broadcasting Transmission System and Digital Data Broadcasting Transmission Method {PMCP Extension Metadata, Data Stream Generating Device, Digital Data Broadcasting Emission System and Digital Data Brocasting Emission Method}

1 is a system configuration diagram defined in the PMCP standard,

2 is a structural diagram of metadata defined in the PMCP standard,

3 is a structural diagram of PMCP extension metadata according to an embodiment of the present invention;

4 is a structural diagram of PSIP data event metadata of FIG. 3;

5 is a metadata structure diagram of an ACAP data service of FIG. 3;

6 is a structural diagram of ACAP application metadata of FIG.

FIG. 7 is a structural diagram of the application metadata 600 of FIG. 6.

FIG. 8 is a diagram illustrating an ACAP object carousel metadata structure in FIG. 5; FIG.

9 is a data carousel metadata structure diagram of FIG. 8;

FIG. 10 is an object carousel metadata structure diagram of FIG. 8;

11 is a structural diagram of channel metadata in FIG. 3;

12 is a structural diagram of PSIP event metadata of FIG. 3;

13 is an example of a PMCP extension message implemented using PMCP extension metadata according to the present invention;

14 is a configuration diagram of an embodiment of a digital data broadcasting transmission system using PMCP extended metadata according to the present invention;

15 is a flowchart illustrating a method of transmitting data broadcast using PMCP extended metadata according to the present invention.

* Explanation of symbols for the main parts of the drawings

300: PMCP Extended Metadata 400: PSIP Data Event Metadata

500: ACAP Data Service Metadata

The present invention relates to metadata for ensuring interoperability among devices constituting a digital data broadcasting transmission system, a data stream generating device, a digital data broadcasting transmission system, and a digital data broadcasting transmission method using the same.

In more detail, the present invention is based on the existing international standard PMCP (Programming Metadata Communication Protocol) defined in order to ensure the interoperability between the devices constituting the digital broadcast transmission system, the digital broadcast to transmit data Metadata structure to ensure interoperability between a data server, a device added to a broadcast transmission system, and devices of a conventional digital broadcast transmission system, a data stream generating device, a digital data broadcast transmission system, and digital data using the same The present invention relates to a broadcast transmission method.

The digital broadcasting system receives the system information (SI) and program information (Program Guide, PG) of the broadcast program through the broadcast channel so that the viewer can easily search for and select the desired broadcast program by digitizing the analog signal. Need to send to.

To this end, ATSC (Advanced Television Systems Committee) has adopted a standard called PSIP (Program and System Information Protocol) to transmit system information and program information of a broadcast program to a transport stream (TS) according to the MPEG-2 system standard. It is defined.

1 is a system configuration diagram defined in the PMCP standard.

According to the PSIP standard, the ATSC is called a PSIP server 110 or a PSIP generator in ATSC, which transmits system information and programming information of a broadcast program in a transport stream. The PSIP information is primarily prepared by the broadcaster program organizer through the Program Management System 120 and transmitted to the PSIP server. In addition, the PSIP information primarily created may be updated, added, or deleted as the broadcast schedule is changed before the final transmission.

The change in the broadcast schedule occurs in a broadcast transmission control device such as a traffic system 130, an automation system 140, an MPEG controller 150, or the like. The broadcast transmission control apparatus should inform the PSIP server so that the PSIP information can be updated with the latest information according to the changed organization information. .

However, the interface defined independently for each operator for the exchange of changed program information cannot guarantee the interoperability between the digital broadcast transmission system developed by various companies, that is, the broadcast transmission control device and the PSIP server. As a result, the operator and device developer of the digital broadcasting transmission system has resulted in much effort and cost in implementing the interface between the broadcasting apparatuses when constructing the broadcasting transmission system.

In order to solve this problem, ATSC defines a metadata structure and a transmission method in the ATSC A / 76 standard called PMCP for the exchange of standardized PSIP information between devices constituting the digital broadcasting transmission system.

2 illustrates a structure diagram of metadata defined in the PMCP standard.

As shown in FIG. 2, the structure of the PMCP metadata 200 includes a message state metadata 210 describing a validity and a processing state of a transmitted message, and a transport stream metadata describing information of a transport stream. Channel metadata 230 describing data 220, virtual channel and channel tuning information, and show metadata 240 describing a playlist of a show used for program information. ), PSIP event metadata 250 describing broadcast program scheduling information, time metadata 260 describing system time information, rating metadata 270 describing rating of a broadcast program, It consists of user-defined metadata 280 that describes the system-level PMCP user-defined information.

The PMCP metadata 200 describes information necessary for the PSIP server to generate PSIP / PSI (Program Specific Information) as a transport stream. In other words, the PMCP standard is required for a broadcast transmission system to transmit PSIP / PSI, which is system information and organization information about an audio / video broadcasting program (a broadcasting program consisting only of audio, video only, or audio and video) in a digital broadcasting environment. Providing metadata was only a consideration.

However, the broadcasting environment is changing from a digital broadcasting environment in which only audio / video can be simply watched to digital data broadcasting, which can provide various services to viewers by transmitting data together with a broadcasting program. .

In order to provide data broadcasting, a broadcasting transmission apparatus which encodes data broadcasting contents according to the data broadcasting standard and outputs them in an MPEG-2 transport stream should be added to the digital broadcasting transmission system. Such a broadcast transmitting device is generally called a data server 160 or a data stream generator.

The data server needs to receive organizational information and encoding information for generating data streams, like a PSIP server for digital services, and broadcasts such as traffic systems, automation systems, and MPEG controllers. It should be possible to change the knitting information and the encoding information by the control device.

However, since conventional PMCP does not describe the organization information and the encoding information for data broadcasting, there is a problem that it is not suitable as an interface of a broadcasting transmission system that guarantees interoperability for data broadcasting transmission. Accordingly, a method for ensuring interoperability between a data server added to a broadcast transmission system and another broadcast apparatus for transmitting digital data broadcast is required.

The present invention has been proposed to solve the above problems, to ensure interoperability between the data server (Data Server) which is a device added to the digital broadcast transmission system for transmitting data broadcast and the devices of the existing digital broadcast transmission system. An object of the present invention is to provide a PMCP extended metadata structure that extends existing PMCP metadata, a data stream generation device, a digital data broadcast transmission system, and a digital data broadcast transmission method using the same.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

The present invention for achieving the above object is a channel metadata for providing system information of a data event constituting a data broadcast program; PSIP data event metadata for providing identification information, organization information of the data event; And ACAP data service metadata for providing encoding information including signaling information and transmission protocol information of data broadcasting content corresponding to the data event.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The Programming Metadata Communication Protocol (PMCP) extended metadata according to the present invention includes channel metadata for providing system information of a data event constituting a data broadcasting program, identification information of a data event, organization information, and a data event table (DET). PSIP data event metadata for providing the descriptor information of the ") and ACAP data service metadata for providing encoding information such as signaling information, transport protocol information, etc. of the data broadcasting content corresponding to the data event. Can be.

The PSIP data event metadata includes data event identification metadata for providing identification information of the data event, data event title metadata for providing a title of the data event expressed in multiple languages, and data event for providing additional information of the data event. Descriptive metadata, data broadcasting reception information metadata that provides information necessary for receiving a data event by the data broadcasting receiver, and DET user-defined metadata for separately defining and using contents to be recorded in addition to the schema defined for DET. It describes the descriptor information of the DET and includes the DET descriptor metadata that provides the descriptor tag number and the descriptor content.

Announcement metadata for data broadcasting should describe DET (Data Event Table) related information defined by ATSC, and signaling metadata for data broadcasting should be ACAP (Advanced Common Application), a data broadcasting standard defined by ATSC. Protocol AIT and related PMT Descriptors should be described, and Object Carousel, which is ACAP's data broadcasting encoding method, should be described.

3 is a structural diagram of PMCP extension metadata according to an embodiment of the present invention.

As shown in FIG. 3, the structure of the PMCP extended metadata 300 according to the present invention describes the PSIP data event metadata 400 and ACAP encoding and AIT signaling information information in the structure of the conventional PMCP metadata 200. The structure is extended by adding the ACAP data service metadata 500.

Message status metadata 310 describes the validity and processing status of the transmitted message. The transport stream metadata 320 describes information of a transport stream. The channel metadata 700 describes Virtual Channel and Channel Tuning information as well as Program Map Table (PMT) descriptor information. The PMT is used to signal the application by providing information about the elementary stream of the program and is defined in detail in the ACAP.

The show metadata 340 describes a list of shows used for the AV broadcast program formation information. The PSIP event metadata 350 describes the organization information of the AV broadcast program. Time metadata 360 describes system time information.

The rating metadata 370 describes a rating of an AV broadcast program. User defined metadata 380 describes PMCP user defined information at the system level.

The PSIP data event metadata 400 includes data event identification information, data broadcast content identification information, data event title information, data event description information, data broadcast reception information, and data event table constituting the data broadcast. , DET) description information. The DET has information on data services on a specific virtual channel and is described in detail in the ATSC's data broadcasting standard (A / 90).

The PSIP data event metadata 400 includes organization information (start time, duration) of a data event as an attribute.

The ACAP data service metadata 500 describes encoding information of data events constituting the data broadcast program, and includes signaling information of the data service and transport protocol information.

4 is a structural diagram of PSIP data event metadata of FIG. 3.

As shown in FIG. 4, the PSIP data event metadata 400 describes data events constituting a data broadcast. The PSIP data event metadata 400 includes data event identification metadata 410, data broadcast content identification metadata 420, data event title metadata 430, data event description metadata 440, data broadcast reception information. Metadata 450, DET user-defined metadata 460, DET descriptor metadata 470, and metadata 480 that describe user-defined information.

 The data event identification metadata 410 describes identification information of the data event, has a channel number corresponding to the data event, additionally a transport stream identifier (TSID), and is included in the data ID (DET). Table ID), an initial start time, and any one selected from ID information randomly assigned by the producer.

The data broadcast content identification metadata 420 describes identification information of the content constituting the data event, and includes an ISAN (International Standard Audiovisual Number) and ID information uniquely assigned to the content by the broadcasting station.

The data event title metadata 430 includes a title of a data event expressed in multiple languages.

The data event description metadata 440 includes additional information of the data event.

The DET user-defined metadata 460 is metadata for individually defining and using contents to be recorded in addition to a predetermined schema with respect to the DET constituting the data broadcast program.

The DET descriptor metadata 470 describes descriptor information of a DET and includes a descriptor tag number, a descriptor content, and the like.

FIG. 5 is a metadata structure diagram of the ACAP data service of FIG. 3.

ACAP data service metadata 500 is metadata that provides encoding information necessary for normal data broadcasting.

The ACAP data service metadata 500 includes the content ID metadata 510 describing the contents ID of the data event and the ACAP describing the signaling information for the application defined in the Advanced Common Application Platform (ACAP) Application Information Table (AIT). ACAP object carousel metadata 530 describing the application metadata 520 and information on object carousel, which is a protocol for transmitting the ACAP application, and user-defined information metadata describing user-defined information on the ACAP data service. Data 540.

FIG. 6 is a structural diagram of ACAP application metadata of FIG. 5.

The AIT is a table describing the application and related information, which is described in detail in the ACAP. The ACAP application metadata 520 is metadata for describing such AIT information. An application common descriptor and a specific ACAP data broadcasting application, which are descriptors commonly applied to all ACAP data broadcasting applications described in the AIT, are described. Describes an application specific descriptor that is a descriptor that can be applied to.

The ACAP application metadata 520 may include metadata describing the application metadata 600, transport protocol metadata 610, DII location metadata 620, AIT custom metadata 630, and AIT custom descriptor ( 640), and so forth.

The transport protocol metadata 610 is metadata describing a Download Info Indication (DII) location descriptor, which is one of application common descriptors, and describes a list of DII messages associated with an object carousel which is a transport protocol of a data broadcasting application. .

The application metadata 600 has attributes such as an organization ID and an application ID to identify each application. In addition, the application metadata 600 may be automatically executed as soon as the corresponding application arrives at the receiver (autostart), stored in the cache memory for a while without execution (present, prefetch), and stored in the cache memory without the automatic execution or execution. It has the property of Control Code that can be controlled to kill or terminate.

FIG. 7 is a structural diagram of the application metadata 600 of FIG. 6.

The application metadata 600 is metadata describing an application specific descriptor, metadata 710 describing a name of an application, metadata 711 describing general information about an application, and an icon related to the application. Metadata 712 describing information about the application; metadata 713 describing information about an application to be prefetched in cache memory; metadata describing a list of DII messages related to the object carousel ( 714 may be configured.

In addition, the application metadata 600 may include metadata 715 describing information on parameters required for starting an ACAP-J based application, metadata describing information for describing a location of the ACAP-J based application ( 716) metadata 717 describing information about parameters needed to start an ACAP-X based application, metadata 718 describing information for describing a location of an ACAP-X based application, ACAP- It may be configured to further include metadata 719 describing information for describing data elements of the X-based application, AIT user-defined metadata 720, and AIT descriptor user-defined data 721.

FIG. 8 is a diagram illustrating an ACAP object carousel metadata structure in FIG. 5.

The ACAP object carousel metadata is metadata for describing encapsulation information and AIT signaling information defined in the ACAP.

The ACAP object carousel metadata 530 describes the data carousel metadata 800 that describes information about the data carousel that transmits the object carousel message and the information about the object carousel that transmits the ACAP application. The object carousel metadata 900 is included.

 9 is a data carousel metadata structure diagram of FIG. 8.

The data carousel metadata 800 describes DSI metadata 810 describing information about a Download Server Initiate (DSI) message, which is one of the data carousel messages, and information about a Download Info Indication (DII) message. DII metadata 820 and PID list metadata 830 describing information about a packet identifier (PID) through which a data carousel message is transmitted.

FIG. 10 is an object carousel metadata structure diagram of FIG. 8.

The object carousel metadata 900 is metadata for describing encapsulation information defined in the ACAP.

The object carousel metadata 900 includes service gateway metadata 910 describing a service gateway message among the message of the object carousel, and a directory object message of the object carousel. Directory metadata 920, file metadata describing the file message of the object carousel 930, stream event metadata 940 describing the StreamEvent message of the object carousel, stream message of the object carousel Include stream metadata 950 to describe.

FIG. 11 is a structural diagram of channel metadata in FIG. 3.

The channel metadata 1000 defined in FIG. 3 further includes metadata describing PMT (Program Map Table) descriptor information, as compared to the conventional channel metadata 230. The PMT provides information about the elementary stream of the program and is used to signal the application with the AIT as defined in the ACAP.

As shown in FIG. 11, the channel metadata 1000 further includes metadata 1200 describing a "deferred_association_tag descriptor" which is a PMT descriptor as compared to the conventional channel metadata 230. In addition, the channel metadata 1000 is a carousel identifier metadata describing a Carousel Identifier Descriptor, which is a PMT descriptor defined for the ACAP data service, which is a PMT descriptor, below the element stream 1100 compared to the conventional channel metadata 230. 1111, application signaling metadata 1112 describing Application Signaling Descriptor, data broadcast identifier metadata 1113 describing Data Broadcast Id Descriptor, stream identifier metadata 1114 describing Stream Identifier Descriptor, association tag Association tag metadata 1115 that describes the Descriptor.

12 is a structural diagram of PSIP event metadata of FIG. 3.

The event identification metadata 1300 describes identification information of an AV event constituting a broadcast program consisting of audio / video and includes a channel number corresponding to the corresponding AV event and an additional transport stream identifier (TSID). It further includes any one selected from the event ID, the initial start time, ID information arbitrarily assigned by the producer.

The content identification metadata 1320 describes identification information of the content constituting the AV event, and includes an ISAN (International Standard Audiovisual Number) and ID information uniquely assigned to the content by a broadcasting station.

The data broadcast content identification metadata 1330 describes identification information of the data broadcast content constituting the data event, and includes an ISAN (International Standard Audiovisual Number) and ID information uniquely assigned to the content by the broadcasting station.

The show data metadata 1340 describes show information constituting an AV event and includes a title of the show, a summary of the show, and rating information of the show.

The EIT user-defined metadata 1350 is metadata for individually defining and using contents to be recorded in addition to a predetermined schema in relation to an event information table (EIT) constituting an audio / video broadcast program.

The EIT descriptor metadata 1360 describes descriptor information of the EIT, and includes a descriptor tag number, a descriptor content, and the like.

User-defined metadata 1370 describes user-defined information about an event constituting an audio / video broadcast program.

13 is an example of a PMCP extension message implemented using PMCP extension metadata according to the present invention.

As can be seen from the attribute of "PmcpMessage", the system sending this message is a traffic system, and the system receiving this message is an ACAP data server.

As can be seen in the "Channel" element, the channel number is 11-1 and the TSID is 101. The PID of the ACAP data element stream is set to 210, the PID of the AIT element stream is 260, the PID of the video element stream is 48, and the PID of the audio element stream is 49.

As an attribute of the " PsipDataEvent " element, a start time, which is organization information of data broadcasting, is defined as 2005-10-27T04: 30: 00 + 09: 00, and a duration is defined as PT50M.

14 is a diagram illustrating an embodiment of a digital data broadcasting transmission system using PMCP extended metadata according to the present invention. The broadcast transmission system using the PMCP extended metadata includes a broadcast transmission control device 1400 and a data stream generation device 1450.

The broadcast transmission control apparatus 1400 generates encoding information and organization information about a data broadcast program using the PMCP extended metadata structure according to the present invention, and controls the output of the transport stream of the data broadcast program according to the organization information.

The broadcast transmission control device 1400 includes a program management system, a traffic system, an automation system, a metadata extractor, a data encoding information editor, an MPEG controller, and a data broadcast content. File server for storing and managing the data, and a data agent for transmitting updated data to the database.

Before transmitting the transport stream, the broadcast transmission control apparatus 1400 may update the organization information and the data broadcast content by using the PMCP extended metadata. In this case, the broadcast transmission control device 1400 updates the data and informs the data stream generation device 1450 of the update information using the PMCP extended metadata.

The data stream generating apparatus 1450, that is, the data server generates and transmits a data stream according to the organization information, system information, and encoding information of the data event described in the PMCP extended metadata.

The data server may generate a PSIP table as a transport stream as well as a data stream including an AIT and an object carousel, a stream descriptor, and the like. The data server generates an AIT according to metadata describing signaling information, encapsulates data according to metadata describing information on an object carousel, a protocol for transmitting an ACAP application, and information on a DSM-CC stream descriptor. Create a stream descriptor according to the metadata describing the.

The data stream generating apparatus 1450 may include an analyzer 1451, a storage 1452, a scheduling unit 1453, and an encoder 1454.

The analyzer 1451 receives PMCP extended metadata and data broadcast content from the broadcast transmission control device 1400. The analysis unit 1451 analyzes the transmitted PMCP extension metadata and registers system information, organization information, and encoding information together with the data broadcasting content in the storage unit 1452.

As illustrated in FIG. 3, the analysis unit 1451 may obtain organization information from attributes of the PSIP data event metadata 400.

As illustrated in FIG. 4, the analyzer 1451 may acquire system information from the corresponding channel metadata 700 using the data event ID of the data event identification metadata 410.

The analyzer 1451 may obtain encoding information from the ACAP data service metadata 500.

The analysis unit 1451 transmits the organization information search information to the scheduling unit 1453. As the organizing information retrieval information, a data event ID for identifying PMCP extension metadata is used. As shown in Fig. 8, when the broadcast schedule information of the data event and the AV event are the same, since there is no separate data event ID, the event ID is used as the schedule information search information. The analyzer 1451 may provide the scheduling unit 1453 with a data event ID for one or more data events to be broadcasted for a predetermined period of time.

The scheduling unit 1453 obtains organization information on the data event from the storage unit 1452 based on the data event ID received from the analysis unit 1451. The scheduling unit 1453 checks the time when the data broadcasting content corresponding to the data event is output to the transport stream by using the acquired organization information. When it is time to output a data event, the scheduling unit 1453 transmits data broadcast content search information, that is, data event ID, to the encoder 1454 to search for data broadcast content corresponding to the data event. If the broadcast schedule information of the data event and the AV event are the same, no separate data event ID exists, so the event ID is used as the data broadcast content search information.

The encoder 1454 obtains corresponding data broadcast content, encoding information, and system information from the storage unit 1452 using the data event ID or the event ID transmitted from the scheduling unit 1453. The encoder 1454 generates a transport stream based on the obtained data broadcasting content, encoding information, and system information, and outputs the transport stream to the user terminal.

15 is a flowchart illustrating a method of transmitting data broadcast using PMCP extended metadata according to the present invention.

The broadcast transmission control device 1400 generates PMCP extension metadata by generating and adding encoding information and schedule information for a data event for data broadcasting in the conventional PMCP metadata 200 (S1301), and then generates the generated PMCP extension. The metadata and the data broadcast content are transmitted to the analyzing unit 1451 of the data stream generating apparatus 1450 (S1303).

In addition, when data broadcasting schedule information or data broadcasting content is added, deleted, or updated, the broadcast transmission control apparatus 1400 updates the existing PMCP extension metadata (S1301), and analyzes the transport stream generating apparatus 1400. The data is transmitted to the unit 1451 (S1303).

The analyzer 1125 analyzes the PMCP extension metadata (S1305), and registers organization information, system information, encoding information, and data broadcast content in the storage unit 1452 (S1307). In addition, the analyzer 1451 transmits the knitting information search information (data event ID or event ID) to the scheduling unit 1453 (S1309).

The scheduling unit 1453 searches for and acquires the knitting information on the data event from among the information registered in the storage 1452 by the knitting information search information (S1311 and S1313).

The scheduling unit 1453 controls the data encoder 1454 to transmit data broadcast content corresponding to the data event according to the data event organization information received from the storage 1452. More specifically, when the scheduling unit 1453 performs a schedule check and it is time to transmit a certain data event (S1315), the scheduling unit 1453 receives data broadcast content search information, that is, a data event ID corresponding to the data event. It transmits to the encoder 1454 (S1317).

The encoder 1454 searches for and acquires corresponding data broadcasting content, system information, and encoding information by using the received data event ID (S1319, S1321). The encoder 1454 generates a transport stream based on the obtained data broadcasting content, system information, and encoding information, and outputs the transport stream to the user terminal (S1323). The scheduling unit 1453 stops output of the transport stream to the encoder 1454 when it is time to end the data event.

As described above, the method of the present invention may be implemented as a program and stored in a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form. Since this process can be easily implemented by those skilled in the art will not be described in more detail.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

As described above, the present invention provides an effect of ensuring interoperability between the broadcast transmission control apparatus and the data server by integrating and extending metadata necessary for transmitting data broadcast into a conventional PMCP metadata structure.

In addition, the present invention provides the effect that the complex control interface such as update, addition, deletion of data events between the broadcast transmission control device and the data server through the PMCP extended metadata efficiently.

Claims (28)

In the PMCP extended metadata that extends the Programming Metadata Communication Protocol (PMCP) metadata, Channel metadata for providing system information of a data event constituting a data broadcast program; PSIP data event metadata for providing identification information and organization information of the data event; And ACAP data service metadata for providing encoding information including signaling information and transmission protocol information of data broadcasting content corresponding to a data event; PMCP extension metadata, including. The method of claim 1, The PSIP data event metadata Data event identification metadata for providing identification of the data event; Data broadcast content identification metadata for providing identification information of content constituting the data event;  Data event title metadata providing titles of data events expressed in multiple languages; Data event description metadata for providing additional information of the data event; Data broadcasting reception information metadata for providing information necessary for reception of the data event by the data broadcasting receiver;  DET custom metadata for separately defining and using the contents to be recorded in addition to the schema defined for the DET; And  PMCP extended metadata that describes DET descriptor information and includes DET descriptor metadata that provides a descriptor tag number, descriptor content, and the like. The method of claim 1, The ACAP data service metadata 400 may include AIT metadata that describes signaling information for an application defined in an ACAP (Application Information Table); Metadata describing information on an object carousel, which is a protocol for transmitting an ACAP application; And  PMCP Extended Metadata, including metadata that describes user-defined information about the ACAP Data Service. The method of claim 1, The channel metadata further provides program map table (PMT) descriptor information for ACAP data broadcasting. PMCP Extended Metadata. In PMCP extended metadata that extends PMCP metadata, The PSIP event metadata Event identification metadata for providing identification information of an AV event constituting a broadcast program consisting of audio / video; Content identification metadata for providing identification information of content constituting the AV event; ACAP data broadcast content identification metadata for identifying information of data broadcast content constituting a data event; Show data metadata for providing show information constituting an AV event; And An EIT user-defined metadata for separately defining and using contents to be recorded in addition to a predetermined schema with respect to an event information table (EIT) constituting an audio / video broadcast program; EIT descriptor metadata that provides descriptor information of the EIT; And It includes user-defined metadata that provides user-defined information about the events that make up the audio / video broadcast program. The PSIP event metadata has the organization information of the data event as an attribute. PMCP Extended Metadata. An analysis unit for analyzing PMCP extended metadata transmitted from the broadcast transmission control apparatus and storing system information, organization information, and encoding information of a data event together with data broadcasting contents in a storage unit; A scheduling unit which acquires organizational information of the data event from the storage unit, and checks the time at which the corresponding data broadcasting content of the data event is output by the acquired organizational information; And And an encoding unit which obtains data broadcast content, encoding information, and system information, which are to be output from the storage unit, and outputs them to the user terminal in a transport stream. Data stream generator. The method of claim 6, The PMCP extended metadata is Channel metadata for providing system information of a data event constituting a data broadcast program; PSIP data event metadata for providing identification information and organization information of the data event; And ACAP data service metadata that provides encoding information such as signaling information, transport protocol information, etc. of data broadcasting content corresponding to the data event. Data stream generator. The method of claim 7, wherein The PSIP data event metadata, Data event identification metadata for providing identification of the data event; Data broadcast content identification metadata for providing identification information of content constituting the data event;  Data event title metadata providing titles of data events expressed in multiple languages; Data event description metadata for providing additional information of the data event; Data broadcasting reception information metadata for providing information necessary for reception of the data event by the data broadcasting receiver;  DET custom metadata for separately defining and using the contents to be recorded in addition to the schema defined for the DET; And  Describes the descriptor information of the DET and includes DET descriptor metadata that provides descriptor tag number, descriptor content, etc. The PSIP data event metadata has the organization information as an attribute. Data stream generator. The method of claim 7, wherein The ACAP data service metadata The ACAP data service metadata 400 may include AIT metadata that describes signaling information for an application defined in an ACAP (Application Information Table); Metadata describing information on an object carousel, which is a protocol for transmitting an ACAP application; And  Device for generating a data stream including metadata describing user-defined information for an ACAP data service. The method of claim 7, wherein The channel metadata includes metadata for providing PMT (Program Map Table) descriptor information for ACAP data broadcasting. The method of claim 7, wherein The PSIP event metadata Event identification metadata for providing identification information of an AV event constituting a broadcast program consisting of audio / video; And Content identification metadata for providing identification information of content constituting the AV event; And ACAP data broadcast content identification metadata for identifying information of data broadcast content constituting a data event; Show data metadata for providing show information constituting an AV event; An EIT user-defined metadata for separately defining and using contents to be recorded in addition to a predetermined schema with respect to an event information table (EIT) constituting an audio / video broadcast program; EIT descriptor metadata that provides descriptor information of the EIT; And An apparatus for generating a data stream including user-defined metadata for providing user-defined information on an event constituting an audio / video program. The method of claim 6, The analysis unit Obtain the organization information from attributes of the PSIP data event metadata, Obtaining the encoding information from the ACAP data service metadata, Acquiring system information from the channel metadata using the data event identification information. Data stream generator. The method of claim 6, The scheduling unit Acquisition of information on the data event from the storage unit using the data event identification information transmitted from the analysis unit Data stream generator. The method of claim 6, The encoder is Acquiring data broadcast content, encoding information, and system information, which are to be output from the storage unit, using the data event identification information transmitted from the scheduling unit. Data stream generator. A broadcast transmission control device for generating and updating PMCP extended metadata having system information, programming information, and encoding information about the data broadcasting program, and controlling the output of the transport stream of the data broadcasting program according to the programming information; And And a data stream generation device for generating and transmitting a data stream according to system information, organization information, and encoding information of a data event described in the PMCP extended metadata received from the broadcast transmission control device. Digital data broadcasting transmission system. The method of claim 15, The data stream generating device, An analysis unit for analyzing PMCP extended metadata transmitted from the broadcast transmission control apparatus and storing system information, organization information, and encoding information of a data event together with data broadcasting contents in a storage unit; A scheduling unit which acquires organizational information of the data event from the storage unit, and checks the time at which the corresponding data broadcasting content of the data event is output by the acquired organizational information; And And an encoding unit which obtains data broadcast content, encoding information, and system information, which are to be output from the storage unit, and outputs them to the user terminal in a transport stream. Digital data broadcasting transmission system. The method of claim 15, The PMCP extension metadata Channel metadata for providing system information of a data event constituting a data broadcast program; PSIP data event metadata for providing identification information and organization information of the data event; And ACAP data service metadata that provides encoding information such as signaling information, transport protocol information, etc. of data broadcasting content corresponding to the data event. Digital data broadcasting transmission system. The method of claim 17, The PSIP data event metadata Data event identification metadata for providing identification of the data event; Data broadcast content identification metadata for providing identification information of content constituting the data event;  Data event title metadata providing titles of data events expressed in multiple languages; Data event description metadata for providing additional information of the data event; Data broadcasting reception information metadata for providing information necessary for reception of the data event by the data broadcasting receiver;  DET custom metadata for separately defining and using the contents to be recorded in addition to the schema defined for the DET; And  Describes the descriptor information of the DET and includes DET descriptor metadata that provides descriptor tag number, descriptor content, etc. The PSIP data event metadata has the organization information as an attribute. Digital data broadcasting transmission system. The method of claim 17, The ACAP data service metadata The ACAP data service metadata 400 may include AIT metadata that describes signaling information for an application defined in an ACAP (Application Information Table); Metadata describing information on an object carousel, which is a protocol for transmitting an ACAP application; And  A digital data broadcasting transmission system including metadata describing user-defined information about an ACAP data service. The method of claim 17, The channel metadata is a digital data broadcasting transmission system including metadata further providing PMT (Program Map Table) descriptor information for ACAP data broadcasting. The method of claim 17, The PSIP event metadata Event identification metadata for providing identification information of an AV event constituting a broadcast program consisting of audio / video; Content identification metadata for providing identification information of content constituting the AV event; And ACAP data broadcast content identification metadata for identifying information of data broadcast content constituting a data event; Show data metadata for providing show information constituting an AV event; And An EIT user-defined metadata for separately defining and using contents to be recorded in addition to a predetermined schema with respect to an event information table (EIT) constituting an audio / video broadcast program; EIT descriptor metadata that provides descriptor information of the EIT; And A digital data broadcasting transmission system including user-defined metadata that provides user-defined information about an event constituting an audio / video broadcasting program. In the digital data broadcasting transmission method, Analyzing the PMCP extension metadata transmitted from the broadcast transmission control device and storing system information, organization information, and encoding information of a data event together with data broadcasting contents in a database; Checking a time at which the corresponding data broadcasting content of the data event is output based on the organization information of the data event obtained from the database; And Obtaining data broadcast content, encoding information, and system information, which are to be output, from the database and outputting the data broadcast content to a user terminal in a transport stream; Digital data broadcasting transmission method. The method of claim 22, The PMCP extension metadata Channel metadata for providing system information of a data event constituting a data broadcast program; PSIP data event metadata for providing identification information and organization information of the data event; And ACAP data service metadata that provides encoding information such as signaling information, transport protocol information, etc. of data broadcasting content corresponding to the data event. Digital data broadcasting transmission method. The method of claim 23, wherein The PSIP data event metadata Data event identification metadata for providing identification of the data event; Data broadcast content identification metadata for providing identification information of content constituting the data event;  Data event title metadata providing titles of data events expressed in multiple languages; Data event description metadata for providing additional information of the data event; Data broadcasting reception information metadata for providing information necessary for reception of the data event by the data broadcasting receiver;  DET custom metadata for separately defining and using the contents to be recorded in addition to the schema defined for the DET; And  Describes the descriptor information of the DET and includes DET descriptor metadata that provides descriptor tag number, descriptor content, etc. The PSIP data event metadata has the organization information as an attribute. Digital data broadcasting transmission method. The method of claim 23, wherein The ACAP data service metadata The ACAP data service metadata 400 may include AIT metadata that describes signaling information for an application defined in an ACAP (Application Information Table); Metadata describing information on an object carousel, which is a protocol for transmitting an ACAP application; And  A digital data broadcasting transmission system including metadata describing user-defined information about an ACAP data service. The method of claim 23, wherein The channel metadata is a digital data broadcast transmission method comprising metadata for further providing PMT (Program Map Table) descriptor information for ACAP data broadcasting. The method of claim 23, wherein The PSIP event metadata Event identification metadata for providing identification information of an AV event constituting a broadcast program consisting of audio / video; Content identification metadata for providing identification information of content constituting the AV event; ACAP data broadcast content identification metadata for identifying information of data broadcast content constituting a data event; Show data metadata for providing show information constituting an AV event; And An EIT user-defined metadata for separately defining and using contents to be recorded in addition to a predetermined schema with respect to an event information table (EIT) constituting an audio / video broadcast program; EIT descriptor metadata that provides descriptor information of the EIT; And A digital data broadcast transmission method comprising user-defined metadata that provides user-defined information about an event constituting an audio / video broadcast program. In a computer-readable recording medium, Channel metadata providing system information of the data event constituting the data broadcasting program transmitted from the broadcast transmission control device, PSIP data event metadata providing the identification information of the data event, the organization information, and data broadcasting content corresponding to the data event. PMCP extended metadata including ACAP data service metadata that provides encoding information such as signaling information, transport protocol information, and the like is analyzed, and system information, organization information, and encoding information of the data event together with the data broadcasting content are analyzed. Storing in a database; Checking a time at which the corresponding data broadcasting content of the data event is output based on the organization information of the data event obtained from the database; And A computer-readable recording medium having recorded thereon a program for executing a step of obtaining data broadcast content, encoding information, and system information, which are to be output from the database, and outputting the same to a user terminal in a transport stream.

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