MX2008002530A - Pmcp extension metadata, data stream generating device, digital data broadcasting emission system and digital data broadcasting emission method thereof - Google Patents

Abstract

Provided are a PMCP extended metadata for securing interoperability among devices constituting a digital data broadcasting emitting system, a data stream generating device using the same, a digital data broadcasting emitting system and a digital data broadcasting emitting method. The PMCP extended metadata includes:a channel metadata for providing system information of data events constituting a data broadcasting program;a program and system information protocol (PSIP) data event metadata for providing identification information and program guide of data events;and an advanced television system committee (ACAP) data service metadata for providing encoding information including signaling information and transmission protocol information of data broadcasting contents corresponding to data events.

Description

SYSTEM AND METHOD FOR THE ISSUANCE OF TRANSMISSION OF DIGITAL DATA AND DEVICE FOR THE GENERATION OF FLOWS OF DATA AND METADATA OF PCMP EXTENSION FIELD OF THE INVENTION The present invention relates to metadata to ensure interoperability between the devices of a digital data transmission emission system, a device for the generation of data streams using the same, a transmission system of data transmission and a method for the transmission of digital data. More particularly, the present invention relates to a metadata structure for ensuring interoperability between the devices of a conventional digital transmission broadcasting system and a data server added to the conventional digital broadcasting transmission system for broadcasting a data transmission with based on a programming of the metadata communication protocol (PMCP), a device for generating data flows using it and a method for transmitting digital data transmission.

BACKGROUND OF THE INVENTION As broadcasting has involved from analog to digital, a digital transmission broadcasting system has been required to transmit system information (S) and the program guide (PG) of transmission programs to the observers. through a transmission channel to allow the observers to conveniently search and select a desired broadcast program.

The Advanced Television System Committee (ATSC) defines a program and system information protocol (PSIP) to transmit system information (SI) and program guidance ( PG) as a transport stream (TS) based on an MPEG-2 system standard.

Figure 1 is a block diagram illustrating a system defined by a PMCP program metadata communication protocol. The ATSC designates a broadcasting broadcasting system that transmits the SI and the PG of the broadcasting programs through a transport stream based on the PSIP as a PSIP server or a PSIP generator. The PSIP information is first composed by a program director through a program management system and the PSIP composite information is transmitted to a PSIP server. The composite PSIP information can be updated, added or deleted if a broadcast schedule changes before finally transmitting the corresponding broadcast programs.

Broadcasting programming changes in a device that controls the broadcast transmission such as a traffic system, an automation system and an MPEG controller. Accordingly, the device controlling the broadcast transmission must have a capability to notify the changes of the broadcast schedule to the PSIP server so that the PSIP server updates the PSIP information with the changed program guide.

Given that the interfaces for the exchange of the program guide with the modified information are interchangeably defined by the operators, the interoperability between the digital broadcasting emission systems developed by many companies, that is, the interoperability between a device that controls the transmission of broadcasting and the PSIP server, I could not be sure. This causes the increase in effort and cost to incorporate an interface between the transmission devices when a broadcasting broadcasting system is constructed in a view of an operator or a developer of a digital broadcasting broadcasting system.

To overcome the problem described above, the ATSC defines the ATSC A / 76 standard, the PMCP. The PMCP introduces a metadata structure to exchange the standard PSIP information between the devices that constitute a digital broadcasting broadcast system and a broadcast method.

Figure 2 is a metadata structure defined in a PMCP. As shown in Figure 2, the structure of the PMCP metadata 200 includes a metadata message status 210, a metadata transport system 220, a metadata channel 230, a special metadata 260 program, a metadata classification 270 and metadata of a private PMCP information 280. The metadata message status 210 describes the validity of a transmitted message and a processing state. The transport stream of the metadata 220 describes the information of the transport flow. The channel metadata 230 describes channel tuning and virtual channel information. The metadata special program 240 describes a playlist of special programs used for a program guide. The time metadata 260 describes the system time information. The classification of metadata 270 describes the classifications of the broadcasting programs. The metadata of the private PMCP information 280 describes the system level information defined by a PMCP user.

The PMCP 200 metadata describes the information for the PSIP server to generate a transport stream to transmit the PSIP / PSI, where the PSI holds the program-specific information. That is, the PMCP is designed to provide a metadata for a broadcasting system to transmit the PSIP / PSI which is the system information and the program guide only for the video / audio transmission programs in a broadcast environment digital. The video / audio transmission program refers to a transmission program that consists of audio only, video only or audio and video.

The conventional digital broadcast environment simply provides audio / video transmission programs to the observers. Said conventional digital transmission environment has involved a digital data transmission environment that provides not only audio / video transmission programs but also watt related services to the observers by transmitting the data with the audio / video transmission programs.

To provide a data transmission service, a conventional digital broadcasting transmission system is required to have a data broadcasting transmission device to encode the data transmission contents in accordance with a data transmission protocol and the output of the contents of encoded data transmission as an MPEG-2 transport stream. The data broadcasting transmission device is designated as a data server 160 or a data flow generator in general.

The data server should receive program guidance and coding information to generate the data flow as similar to the PSIP server for a digital service. The control device of the broadcast transmission such as a traffic system, an automation system and an MPEG control system must have the ability to modify the program guide and encode the information.

Since the conventional PMCP does not describe the program guide and the coding information for data transmission, the conventional PMCP is not appropriate as an interface of a data transmission emission system to ensure interoperability for broadcast transmission of the data. Therefore, there is a demand for a system and method to ensure interoperability between the data server, which is newly added for data transmission and the other transmission devices for transmitting the data broadcasting programs.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a metadata structure to ensure interoperability between a conventional digital transmission broadcast system and a data server, added to the conventional digital transmission broadcast system to transmit a data broadcast based on a programming of the metadata communication protocol (PMCP), a device for generating data flow using it, a system for transmitting digital data and a method for transmitting digital data .

In accordance with an aspect of the present invention, a program for the metadata communication protocol is provided; a program and protocol of the information of the system (PSIP) of the metaevents of data of data to provide the information of identification and the guide of program of the events of data and a committee of the system of television advanced (ACAP) of the metadatos of the data service to provide the coding information that includes the signaling information and the transmission protocol information of the contents of the data transmission corresponding to data events.

Advantageous Effects In the present invention, a conventional PMCP metadata structure is extended by adding a metadata for the transmission of data broadcasting thereto. The extended PMCP metadata in accordance with the present invention ensures interoperability between a data server and a device that controls the broadcast transmission.

Also, the PMCP extended metadata in accordance with the present invention provides a control interface for updating, adding and deleting data events between a device that controls the broadcast transmission and a data server.

BRIEF DESCRIPTION OF THE DRAWINGS The foregoing and other objects and features of the present invention will become apparent from the following description of the preferred embodiments given together with the accompanying drawings, in which: Figure 1 is a diagram of block that illustrates a system defined in a PMCP.

Figure 2 is a block diagram illustrating a metadata structure defined in a PMCP.

Figure 3 is a block diagram illustrating an extended PMCP metadata structure in accordance with one embodiment of the present invention.

Figure 4 is a block diagram illustrating a structure of a PSIP data event metadata of Figure 3.

Figure 5 is a block diagram illustrating a structure of an ACAP data service metadata of Figure 3.

Figure 6 is a block diagram illustrating a structure of an ACAP application metadata of Figure 5.

Figure 7 is a block diagram illustrating a structure of an application metadata of Figure 6.

Figure 8 is a block diagram illustrating a structure of an ACAP object carousel metadata of Figure 5.

Figure 9 is a block diagram illustrating a metadata structure of the data carousel of Figure 8.

Figure 10 is a block diagram illustrating a structure of a metadata of the object carousel of Figure 8.

Figure 11 is a block diagram illustrating a structure of a channel metadata of Figure 3.

Figure 12 is a block diagram illustrating a structure of a PSIP event metadata of Figure 3.

Figure 13 is a block diagram illustrating a structure of an extended PMCP message generated using an extended PMCP metadata in accordance with one embodiment of the present invention.

Figure 14 is a block diagram illustrating a digital data transmission emission system using an extended PMCP metadata in accordance with one embodiment of the present invention and Figure 15 is a flow diagram illustrating a method of digital data transmission broadcast using an extended PMCP metadata in accordance with one embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION Other objects and aspects of the invention will become more apparent from the following description of the modalities with reference to the accompanying drawings, which are set forth in this document later.

A metadata communication protocol (PMCP) programming of extended metadata in accordance with the present invention may include: a channel metadata to provide the system information of the data events constituting a data transmission program, a metadata of the PSIP data events to provide the identification information of the data events, program guide and descriptor information of a table of the data events (DET) and an ACAP data service metadata to provide information signaling the data transmission contents corresponding to the data events and coding the information such as the transmission protocol information.

The PSIP data event metadata includes: a metadata to identify the data events to provide the identification information of the data events, a small metadata of the data events to provide a title of a data event, a metadata Description of the data events to provide the complementary information of the data events, a data transmission that receives the information metadata to provide the necessary information to a data transmission receiver to receive a corresponding data event, a metadata of private information DET to receive the individually defined contents together with the predefined schema related to DET and a metadata of the descriptor DET to describe the information of the descriptor of DET and providing a tag number of the descriptor and a content of the descriptor.

An announcement metadata for a data transmission must describe the information related to a data event table (DET) defined by the ATSC, and a signaling metadata for data transmission must describe the AIP of a common application protocol Advanced (ACAP) which is a data transmission standard defined by the ATSC and related PMT descriptors and an object carousel which is an ACAP data transmission coding scheme.

Figure 3 is a block diagram illustrating an extended PMCP metadata structure in accordance with one embodiment of the present invention. As shown in Figure 3, the extended metadata PMCP 300 has an extended structure of a conventional PMCP metadata 200 shown in Figure 2 by adding a PSIP 400 data event metadata and an ACAP 500 data service metadata thereof. The ACAP 500 data service metadata describes information about ACAP encoding and AIT signaling.

A metadata of message state 310 describes the validity of a transmitted message and the processing state of the transmitted message. A metadata of the transport stream 320 describes the information of the transport flow. A channel 700 metadata describes not only the information about a virtual channel and the channel tuning but also the descriptor information of a program map table (PMT). The PMT provides information about an elementary flow of a program such as signaling applications. The ACP prescribes the PMT in detail.

A special metadata program 340 describes a playlist of special programs used for an AV transmission program guide. A PSIP 350 event metadata describes an AV transmission program guide. A time metadata 360 describes the time information of the system.

A classification metadata 370 describes the classifications of the AV transmission programs. A private PMCP information metadata 380 describes the system level information defined by a PMCP user.

The PSIP 400 data event metadata includes the data event identification information, the data transmission content identification information, the data event title information, the data event description information, the data event information information of the reception of the transmission of data and the information of the description of the table of data events (DET). The DET contains information about the data service of a specific virtual channel. Said DET is well described in the ATSC data transmission standard A / 90.

The metadata of the PSIP 400 data events includes the program guides of a data event, such as the start time and the circulation time.

The ACAP 500 data service metadata describes the encoding information of the data events that constitute a data transmission program. The metadata of the ACAP 500 data service includes the signaling information of the data services and the information of the transmission protocol.

Figure 4 is a block diagram illustrating a structure of a PSIP data event metadata of Figure 3. As shown in Figure 4, the metadata of the PSIP 400 data events describes the data events that constitute the transmission of data. The PSIP 400 data event metadata includes a data event identification metadata 410, a data transmission content identification metadata 420, a data metadata of the data events 430, a metadata of the description of the events of data 440, a data metadata of the reception of the data transmission 450, a private information metadata DET 460, a metadata of the descriptor DET 470 and a metadata of the private pmcp information 480.

The data event identification metadata 410 describes the identification information of a data event and contains a channel number corresponding to a predetermined data event and a transport flow identifier (TSID). The data event identification metadata 410 may further include one of a data ID which is an ID table included in the DET, an initial start time and a localized ID for a producer.

The data transmission content identification metadata 420 describes the identification information of the contents that constitute the data events and includes an international standard audio-visual number (ISAN) and an ID assigned to the contents by a broadcasting station.

The metadata of the title of the data events 430 includes the titles of the data events expressed as multi-languages. The metadata of the description of the data events 440 includes the supplementary information of the data events. The metadata of the private information of the DET 460 is for registering the private information defined by the user next to the predetermined schemes related to a DET constituting a data transmission program. The metadata of the DET descriptor 470 describes the descriptor information of a DET and includes a tag number of the descriptor and the content of the descriptor. Figure 5 is a block diagram illustrating a structure of an ACAP data service metadata of Figure 3. With reference to Figure 5, the ACAP 500 data service metadata provides coding information for data transmission typical The ACAP 500 data service metadata includes a content ID metadata 510 to describe a content ID of a data event, a metadata of the ACAP 520 application to describe the signaling information for the application defined in the table of the Application Information (AIT) of the Advanced Common Application Platform (ACAP), an ACAP 530 object carousel metadata to describe information about an object carousel that is a protocol that transmits an ACAP application and a metadata of private information 540 to describe the information defined by a user related to an ACAP data service.

Figure 6 is a block diagram illustrating a structure of an ACAP application metadata of Figure 5.

With reference to Figure 6, the allocation information table (AIT) is a table that describes the information related to the applications. The ACAP describes the AIT in detail. The metadata of the ACAP 520 application describes the information about the AIT. That is, the common descriptor of the application of an ACAP 520 application metadata that is commonly applied to all the ACAP data transmission applications described in the AIT and a specific descriptor of the application that is a descriptor that can be applied to an application. of specific ACAP data transmission.

The metadata of the ACAP 520 application includes an application metadata 600, a transport protocol metadata 610, a location metadata Dll 620, a private information metadata AIT 630 and a metadata of the AIT 640 descriptor.

The metadata of the transport protocol 610 describes a descriptor of the location of the download information indicator (Dll), which is one of the common application descriptors. That is, the metadata of the transport protocol 610 describes the list of the Dll message related to the object carousel which is a transport protocol for the data transmission application.

The application metadata 600 includes the properties such as organization ID and an application ID to identify each application. Also, application metadata 600 has a control code such as a "self-start" to auto-start a corresponding application in a receiver, a "present" or a "prefetch" memory manager module to temporarily store it in a cache memory without running and a "terminator" or an "eliminator" to terminate an application stored in the cache without auto-initiating the application.

Figure 7 is a block diagram illustrating a structure of an application metadata of Figure 6. With reference to Figure 7, application metadata 600 describes a descriptor of specific applications. The metadata of the application 600 includes: a metadata of name 710 to describe an application name, a metadata of information of the application 711 to describe the general information about the application, a metadata of icon 712 to describe the information for the icons related to the applications, a prefetch metadata 713 to describe the information about the applications stored in a cache and a Dll application metadata 714 to describe a list of Dll messages related to an object carousel.

The application metadata 600 also includes an application metadata ACAP-J 715 to describe the parameters for the start of an application based on ACAP-J; a location metadata of the ACAP-J 716 application to describe the location information of an application based on ACAP-J; a metadata of the location of the ACAP-X 717 application to describe the information for the parameters for the start of an application based on ACAP-C; an application location metadata ACAP-X 718 to describe the location information of an application based on ACAP-X; a limit metadata of the ACAP X 719 application to describe the data parameters of an application based on ACAP-X, a private information metadata AIT 720 and a metadata of the AIT 721 descriptor.

Figure 8 is a block diagram illustrating a structure of an ACAP object carousel metadata of Figure 5. With reference to Figure 8, an ACAP object carousel metadata describes the encapsulation information and the AIT signaling information. defined in the ACAP.

The ACAP object carousel metadata 530 includes the data carousel metadata 800 to describe the information for a data carousel that transmits an object carousel message and an object carousel metadata 900 to describe information about a carousel. object that transmits an ACAP application.

Figure 9 is a block diagram illustrating a structure of a data carousel metadata of Figure 8. With reference to Figure 9, data carousel metadata 800 includes a DSI metadata 810 to describe information about message initial download server (DSI) which is one of the data carousel messages, a Dll metadata 820 to describe information about the indication of download information (Dll) and a metadata of the PID 830 list to describe the identifier of the packet that transmits a data carousel message.

Figure 10 is a block diagram illustrating a structure of a metadata of the object carousel of Figure 8. The metadata of the object carousel 900 describes the encapsulation information defined in the ACAP.

As shown in Figure 10, the object carousel metadata 900 includes a service gate metadata 910 to describe a service gateway message between object carousel messages., a directory meditate 920 for describing an object directory message of an object carousel, a file metadata 930 for describing a file message of an object carousel, a metadata of event flow 940 to describe a message of the flow of event of an object carousel and a flow metadata 950 to describe a flow message of an object carousel.

Figure 11 is a block diagram illustrating a structure of a channel metadata of Figure 3. The channel metadata 1000 defined in Figure 3 further includes the metadata to describe the information about a map descriptor of the map of program despite a conventional channel metadata 230. The PMT provides information about a flow of the element of a program, and is used to signal the application with the AIT as defined in the ACAP.

As shown in Figure 11, channel 1000 metadata also includes a metadata 1200 to describe the "distributed association_label descriptor" which is a PMT descriptor despite a conventional channel metadata 230. Also, channel metadata 1000 also includes the lower level metadata under the metadata of the flow of element 1100 despite the conventional channel metadata 230. The lower level metadata under the flow metadata of element 1100 includes a carousel identifier metadata 1111 to describe a carousel ID descriptor that is a PMT descriptor defined by the ACAP data transmission; a signaling metadata of application 1112 to describe a signaling descriptor of the application; a data transmission ID metadata 1113 to describe an ID descriptor of the data transmission; a metadata of the stream ID 1114 to describe a flow identifier and a metadata of the association tag 1115 to describe an association tag descriptor.

Figure 12 is a block diagram illustrating a structure of a PSIP event metadata of Figure 3. The event identifier metadata 1300 describes the identifier information of an AV event which constitutes a transmission program composed of audio and video. The event identifier metadata 1300 also includes a channel number corresponding to a predetermined AV event and a transport stream identifier (TSID). The metadata identifier of event 1300 also includes one of an event ID, an initial start time and an ID assigned by a producer.

The metadata of the content identifier 1320 describes the identifier information of the contents that constitute an AV event and includes an international standard audiovisual number (ISAN) and the ID information assigned to the contents by a transmission state.

The ID metadata of the data transmission content 1330 describes the identifier information of the data transmission contents that constitute a data event. The ID metadata of the data transmission content 1330 includes an ID and ISAN information only assigned to the contents by a transmit status.

The metadata of special program data 1340 describes the information of the special program that constitutes the AV event and includes information about a title, a summary and a classification of the special program.

The metadata of the private information EIT 1350 is to record the private information defined by the user for an event information table (EIT) that composes the audio / video transmission program.

The metadata of the EIT descriptor 1360 describes the descriptor information of an EIT and includes a tag number of the descriptor and the contents of the descriptor.

Figure 13 is a block diagram illustrating a structure of an extended PMCP message generated using an extended PMCP metadata in accordance with one embodiment of the present invention.

As noted from an attribute of "Message Pmcp", a system transmitting a message in accordance with the present invention is a traffic system and a system for receiving this message is an ACAP data server.

As noted from a "channel" element, a number is 11-1 and a TSID is 101. The packet identifier (PID) of an ACAP data element is set to 210 and the PID of the AIT element is set as 260. Also, the PID of the video element is set to 48 and the PID of the audio element flow is set to 49.

As noted from a "Psip Data Event" item, the program guide of the data transmission is set as follows. For example, the initial time is defined as 2005-10-27T04: 30: 00 + 09: 00 and the duration is defined as PT50M.

Figure 14 is a block diagram illustrating a digital data transmission emission system using an extended PMCP metadata in accordance with one embodiment of the present invention. The transmission broadcast system using an extended PMCP metadata in accordance with the present embodiment includes a device that controls the broadcast transmission 1400 and a device that generates the data stream 1450.

The broadcast transmission control device 1400 generates the coding information and the program guide for a data transmission program using the PMCP extended metadata in accordance with the present invention. The broadcast transmission control device 1400 also controls the output of a transport stream of a data transmission program in accordance with the generated program guide.

The control device of the broadcast transmission 1400 includes a program management system, a traffic system, an automation system, a metadata extractor, a data encoding information editor, an MPEG driver, a file server to store and manage the data transmission content and a data agent to transmit the updated transmission data to a database.

The broadcast transmission control device 1400 can update the program guide and the data transmission contents using the PMCP extended metadata before transmitting a transport stream. In this case, the device controlling the transmission 1400 updates the data and notifies the updating of the data to the device generating the data stream 1450 using the PMCP extended metadata.

The device that generates the data stream 1450, that is, a data server generates a transport stream in accordance with the information of the data events described in the PMCP extended metadata such as the program guide, the system information and the coding information.

The data server can generate not only a data stream that has an AIT, an object carousel and a flow descriptor, but also a PSIP table as a transport stream. The data server creates the AIT in accordance with a metadata that describes the signaling information and encapsulates the data in accordance with the metadata that describes the information about the object carousel which is a protocol for transmitting an ACAP application. The data server also creates a flow descriptor in conformance with the metadata that describes the information about a DSM-CC flow descriptor.

The device generating the data stream 1450 includes an analyzer 1451, a memory 1452, a scheduler 1453 and an encoder 1454. The analyzer 1451 receives the PMCP extended metadata and the data transmission contents of a device that controls the transmission of broadcasting 1400. The analyzer 1451 analyzes the transmitted PMCP extended metadata and records the system information, the program guide and the encoding information with the contents of the data transmission to the memory 1452.

Analyzer 1451, as shown in Figure 3, can obtain the program guide of the properties of a PSIP 400 data event metadata.

Analyzer 1451, as shown in Figure 4, can obtain system information from a corresponding channel metadata 700 using a data event ID of a metadata of the data event ID 410.

The analyzer 1451 can obtain the information of the metadata encoding of the ACAP 500 data service.

The analyzer 1451 transmits the search information of the program guide. The data event ID that identifies an extended PMCP metadata is used as the search information of the program guide. As shown in Figure 8, if the one data event and the AV event have the same program guide, an event ID is used as search information of the program guide because the ID of the additional data events is not present. The analyzer 1451 may provide an ID of the data events for one or more of the data events for the 1453 programmer.

Programmer 1453 obtains program guidance for a data event of memory 1452 using the data event ID of analyzer 1451. Programmer 1453 inspects a time of the output of the contents of the data transmission of the Data event as a transport flow using the obtained program guide. The programmer 1453 transmits the search information of the data transmission contents, that is, an event data ID for the encoder 1454 when issuing any data of the event for the search of the contents of the data transmission corresponding to the data events. If the data events and the AV event have the same program guide, an ID event is used as the data transmission search information because the ID of the additional data events is not present.

The encoder 1454 obtains the data transmission contents, encoding the information and system information of the memory 1452 using the ID of the data events or the event ID transmitted from the scheduler 1453. The encoder 1454 creates the transport streams for the contents of the data transmission obtained, coding the information and the system information and issuing the transport flows created for a user terminal.

Figure 15 is a flow diagram illustrating a method of transmitting digital data using PMCP extended metadata in accordance with one embodiment of the present invention.

As shown in Figure 15, the broadcast transmission control device 1400 creates an extended PMCP metadata by creating and adding the coding information and programming information for the data events for data transmission to a DMCP metadata. conventional 200 in step S1301. Then, the broadcast transmission control device 1400 transmits the created PMCP extended metadata and the data transmission contents to the analyzer 1451 of the data stream generation device 1450 in step S1303.

When the program guides of the data transmission or the contents of the data transmission are added, omitted or updated, the device controlling the broadcast transmission 1400 updates a PMCP metadata previously created in step S1301 and transmits the extended PMCP metadata updated for the analyzer 1451 of the transport flow generation device 1500 in step S1303.

The analyzer 1251 analyzes the PMCP extended metadata in step S1305, and records the program guide, the system information, the encoding information and the contents of the data transmission in the memory 1452 in the step S1307. Therefore, the analyzer 1451 transmits the search information of the program guide such as an ID of the data events or an event ID to the scheduler 1453 in step S1309.

Programmer 1453 seeks and obtains a program guide for a data event between the information recorded in memory 1452 based on the search information of the program guide in steps S1311 and S1313.

The scheduler 1453 controls the data encoder 1454 to transmit the contents of the corresponding data transmission to a data event in accordance with the data event program guide received from the memory 1452. In more detail, the programmer 1453 inspects a Program. If the scheduler 1453 determines that it is a time to transmit the a data event in step S1315, the scheduler 1453 transmits an ID of the data events corresponding to the data transmission search information, i.e. an event of data to encoder 1454 in step S1317.

The encoder 1454 searches and obtains the contents of the data transmission, the system information and the encoding information using the ID of the data events in steps S1319 and S1321. The encoder 1454 creates the transport streams for the contents of the data transmission obtained, the system information and the encoding information and transmits the transport flows created to a user terminal in step S1323. The scheduler 1453 stops the encoder 1454 to emit the transport stream at a time of termination of the data events.

The method described above in accordance with the present invention can be incorporated as a program and stored in a computer readable record medium. The computer-readable record medium is any data storage device that can store data that can be read later by the computer system. The computer-readable recording medium includes a read-only memory (ROM), a random access memory (RAM), a CD-ROM; a floppy disk, a hard disk and an optical magnetic disk.

The present application contains subject matter related to Korean patent application No. 2005-0076723, filed with the Korean Intellectual Property Office on August 22, 2005, the contents of which are incorporated herein by reference.

While the present invention has been described with respect to certain embodiments, it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the scope of the invention as defined in the following claims.

Claims (28)

1. An extended metadata for the metadata communication protocol (PMCP) program, comprising: a channel metadata to provide system information of the data events that constitute a data transmission program; a metadata for the data events of the system and program information protocol (PSIP) to provide the identification information and program guide of the event data and a data service metadata (ACAP) of the system committee of advanced television to provide the coding information that includes the signaling information and the information of the transmission protocol of the contents of the data transmission corresponding to the event data.

2. The extended PMCP metadata according to claim 1, wherein the metadata of the PSIP data events includes: a metadata for the identification of the data events to provide the identification information of a data event; a metadata for identifying the content of data transmission to provide information identifying the contents that constitute a data event; a metadata of the data event title to provide a data event title expressed in multi-languages, a data event description metadata to provide supplementary information of a data event, a metadata of the information received from the data transmission to provide predetermined information to a data transmission receiver to transmit a corresponding data event, a private information metadata of the data event table (DET) to record the user-defined private information between the schemes DET-related defaults and a DET descriptor metadata to describe the information of the DET descriptor and including a descriptor tag number and the contents of the descriptor.

3. The extended PMCP metadata according to claim 1, wherein the metadata of the ACAP data service includes: a metadata of the application information table (AIT) to describe the signaling information for the applications defined in an information table of application (AIT) of advanced common application platform (ACAP); an object carousel metadata to describe the information about an object carousel that is a protocol for transmitting an ACAP application and an ACAP private information metadata to describe the user-defined private information for an ACAP data service.

4. The extended PMCP metadata according to claim 1, wherein the channel metadata further provides information of the descriptor of a program map table (PMT) for an ACAP data transmission.

5. The extended PMCP metadata according to claim 1, further comprising a PSIP event metadata having the data event program guide as an attribute, wherein the PSIP event metadata includes: an event identification metadata to provide the identification information of the audio and video (AV) events that constitute a transmission program composed of audio and video; a content identification metadata that provides identification information of the composite contents of an AV event; a metadata for identifying the ACAP data transmission content to provide the identification information of the data transmission contents that constitute a data event; a special program metadata to provide the special program information that constitutes an AV event; a private information metadata of the event information table (EIT) to record an individually defined private information together with the predetermined schemes related to the EIT that constitutes the audio / video transmission program; a metadata of the EIT descriptor to provide information of the EIT descriptor and a private information metadata to provide private information defined by the user for the events that constitute an audio / video transmission program.

6. A device for generating the data stream comprising: an analyzer for storing the system information, the program guide and the encoding information in a memory with the contents of the data transmission by analyzing an extended metadata of the protocol program of metadata communication (PMCP) transmitted from a control device of the broadcast transmission; a programmer to obtain the program guide of a data event from the memory and inspect a time of transmission of the corresponding data transmission contents of the data events in accordance with the obtained program guide and an encoder to obtain the contents of the transmission of programmed data to be emitted from the memory, coding the information and the system information thereof.

7. The data flow generation device according to claim 6, wherein the PMCP extended metadata includes: a channel metadata to provide the system information of the data events constituting a data transmission program; a metadata of the data events for the system and program information protocol (PSIP) to provide the identification information and the program guide of the data events and a data service metadata (ACAP) of the system committee Advanced television to provide encoding information including signaling information and transmission protocol information of the contents of the data transmission corresponding to the data events.

8. The data flow generation device according to claim 7, wherein the PSIP data event metadata includes: a data event identification metadata to provide the identification information of a data event; a metadata for the identification of the data transmission content to provide the identification information of the contents that constitute a data event; a metadata of the data event title to provide a data event title expressed in multi-languages; a metadata of the description of the data event to provide supplementary information of a data event; a metadata for the information of the reception of the data transmission to provide the predetermined information to a receiver of the data transmission to receive a corresponding data event; a private information metadata of the data event table (DET) to record the private information defined by the user next to the DET-related default schemas and a DET descriptor metadata to describe the DET descriptor information and including a number of the descriptor label and the contents of the descriptor.

9. The data flow generation device according to claim 7, wherein the ACAP data service metadata includes: a metadata of the application information table (ACAP) to describe the signaling information for the applications defined in a Application Information Table (AIT) of the Advanced Common Application Platform (ACAP); an object carousel metadata to describe the information about an object carousel that is a protocol for transmitting an ACAP application and an ACAP private information metadata to describe the user-defined private information for an ACAP data service.

10. The data stream generating device according to claim 7, wherein the channel metadata further provides a descriptor information of the program map table (PMT) for an ACAP data transmission.

11. The data stream generation device according to claim 7, wherein the PSIP event metadata includes: an event identification metadata to provide the identification information of the audio and video (AV) events that constitute a program of transmission composed of audio and video; a content identification metadata that provides the identification information of the composite contents of an AV event; a metadata for identifying the ACAP data transmission content to provide the information identifying the contents of the data transmission that constitutes a data event; a special program metadata to provide the information of the special program that constitutes an AV event; a private information metadata of the event information table (EIT) to record individually recorded private information together with predetermined schemes related to the EIT that constitutes an audio / video transmission program; a metadata of the EIT descriptor to provide the information of the EIT descriptor and a metadata of the private information to provide the private information defined by the user for the events that constitute an audio / video transmission program.

12. The data flow generation device according to claim 6, wherein the analyzer obtains the program guide of the PSIP data event metadata property, obtains the data encoding information from the ACAP data service metadata and obtains information of the channel metadata system using the data event identification information.

13. The data flow generating device according to claim 6, wherein the programmer obtains the program guide of a memory data event using the identification information of the data events transmitted from the analyzer.

14. The data flow generation device according to claim 6, wherein the encoder obtains the transmission content encoding the information and system information that is programmed to be issued from the memory using the identification information of the data transmitted from the programmer.

15. A digital data transmission emission system comprising: a device that controls the transmission of broadcasting to create and update an extended PMCP metadata that has system information, program guide and encodes the information of a data transmission program and controlling a transport stream of a data transmission program to be broadcast in accordance with the program guide and a device that generates the data flow to generate a data flow in accordance with the system information, the program guide and the encoding information of the data events described in the extended PMCP metadata received from the control device of the broadcasting transmission.

16. The digital data transmission emission system according to claim 15, wherein the data flow generating device includes: an analyzer for storing the system information, the program guide and the encoding information in a memory with data transmission contents by analyzing an extended metadata of the metadata communication protocol (PMCP) program transmitted from a broadcast transmission control device; a programmer to obtain the program guide of a data event from the memory and inspect a time of transmission of the corresponding data transmission contents of the data events in accordance with the obtained program guide and an encoder to obtain the contents of data transmission programmed to be issued from the memory, coding the information and the system information thereof.

17. The digital data transmission emission system according to claim 15, wherein the extended PMCP metadata includes: a channel metadata to provide the system information of the data events constituting a data transmission program; a data event metadata of the system and program information protocol (PSIP) to provide the identification information and the program guide of the data events and a data service metadata (ACAP) of the advanced television system committee to provide the coding information that includes the signaling information and the information of the transmission protocol of the contents of the transmission of data corresponding to the data events.

18. The digital data transmission emission system according to claim 17, wherein the PSIP data event metadata includes: a data event identification metadata to provide the identification information of a data event; a metadata for identifying the content of data transmission to provide information identifying the contents that constitute a data event; a data event title metadata to provide a title of a data event expressed in multi-languages; a metadata of the description of data events to provide supplementary information of a data event; a metadata of the information for the reception of the data transmission to provide predetermined information for a data transmission receiver to receive a corresponding data event; a metadata of the private information of the data event table (DET) to record the private information defined by the user together with the predetermined schemas related to the DET and a DET metadata descriptor to describe the descriptor information of the DET and including a label number of the descriptor and the contents of the descriptor.

19. The digital data transmission emission system according to claim 17, wherein the ACAP data service metadata includes: a metadata of the request information table (AIT) to describe the signaling information of the defined applications in an application information table (AIT) of the Advanced Common Application Platform (ACAP), a metadata of the object carousel to describe information about an object carousel that is a protocol for transmitting an ACAP application and a metadata for ACAP private information to describe the private information defined by the user for an ACAP data service.

20. The digital data transmission emission system according to claim 17, wherein the metadata of the channel further provides the descriptor information of a program map table (PMT) for an ACAP data transmission.

21. The digital data transmission emission system according to claim 17, wherein the PSIP event metadata includes: an event identification metadata to provide audio and video event identification information (AV) constituting the composite program of audio and video, a content identification metadata that provides content identification information composing an AV event, a metadata for identifying the ACAP data transmission content to provide the identification information of the data transmission contents constituting an event of data; a special program metadata to provide special program information constituting an AV event, a private information metadata of the event information table (EIT) to record an individually defined private information along with the predetermined schemes related to the EIT that constitutes a audio / video transmission program; a metadata of the EIT descriptor to provide the information of the EIT descriptor and a private information metadata to provide the user-defined private information for the events that constitute an audio / video transmission program.

22. A method of transmitting digital data comprising the steps of: a) storing the system information, the program guide and the encoding information of the data events with the contents of the data transmission by analyzing an extended metadata PMCP transmitted from a data transmission control device; b) obtain the program guide of a data event from the memory and inspect an emission time corresponding to the data transmission contents of the data events in accordance with the obtained program guide and c) obtain the transmission data of data programmed to be issued from the memory, the coding information and the system information thereof.

23. The method of transmitting digital data in accordance with claim 22, wherein the PMCP extended metadata includes: a channel metadata to provide the system information of the data events constituting a data transmission program; a data event metadata of the system and program information protocol (PSIP) to provide identification information and the program guide of the data events and a data service metadata of the Advanced Television System Committee (ACAP) to provide the encoding information that includes the signaling information and the transmission protocol information of the data transmission contents corresponding to the data events.

21. The method of transmitting digital data in accordance with claim 23, wherein the metadata of the PSIP data event includes: a data event identification metadata to provide the identification information of a data event; a metadata for identifying the content of data transmission to provide information identifying the contents that constitute a data event; a data event title metadata to provide a title of a data event expressed in multi-languages; a data event description metadata to provide supplementary information of a data event; an information metadata for receiving the data transmission to provide the predetermined information for a data transmission receiver to receive a corresponding data event; a private information metadata of the data event table (DET) to record the private information defined by the user together with the predetermined schemas related to the DET and a metadata of the DET descriptor to describe the information of the DET descriptor and including a tag number of the descriptor and the contents of the descpptor, where the metadata of the PSIP event has the program guide of the data event as a property.

25. The digital data transmission emission method according to claim 23, wherein the ACAP data service metadata includes: a metadata from the application information table (AIT) to describe the signaling information for the defined applications in an application information table (AIT) of the common advanced application platform (ACAP); an object carousel metadata to describe the information about an object carousel that is a protocol for transmitting an ACAP application and an ACAP private information metadata to describe the user-defined private information for an ACAP data service.

26. The method of transmitting digital data in accordance with claim 23, wherein the channel metadata further provides information of the descriptor of a program map table (PMT) for an ACAP data transmission.

27. The method of issuing the digital data transmission according to claim 23, wherein the PSIP event metadata includes: an event identification metadata to provide the audio and video event identification (AV) information constituting a program of audio and video composite transmission, a content identification metadata that provides information identifying the contents that make up an AV event; a metadata for identifying the ACAP data transmission content to provide the identification information of the data transmission contents that constitute a data event; a special program metadata to provide the special program information that constitutes an AV event; a private information metadata of the event information table (EIT) to record an individually defined private information together with the predetermined schemes related to the EIT that constitutes an audio / video transmission program; a metadata of the EIT descriptor to provide the information of the EIT descriptor and a private information metadata to provide the private information defined by the user for the events that constitute an audio / video transmission program.

28. A computer-readable record means for storing a program for executing a digital data transmission method, the method comprising the steps of: a) storing the system information, the program guide and the event coding information data with the contents of the data transmission by analyzing an extended PMCP metadata transmitted from a broadcast transmission control device, where the PMCP extended metadata includes a channel metadata to provide system information of the data events constituting a data broadcast program, a metadata of the program data event and the system information protocol (PSIP) to provide the identification information and the program guide of the data events and a data service metadata of the committee Advanced television system (ACAP) to provide the encoding information that i ncludes the signaling information and the information of the transmission protocol of the data transmission contents corresponding to the data events; b) obtain the program guide of a data event from the memory and inspect a transmission time corresponding to the data transmission contents of the data events in accordance with the program guide obtained and c) obtain the contents of the transmission of data programmed to be emitted from the memory, coding the information and the information of the same system.