KR100534596B1 - Data broadcasting apparatus and its method of supporting a forward compatibility - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a data broadcast receiving apparatus, a method of supporting forward compatibility thereof, and a computer-readable recording medium having recorded thereon a program for realizing the method.

2. The technical problem to be solved by the invention

The present invention relates to a digital broadcast receiver capable of upgrading the software of a receiver at any time in accordance with various service types that may occur in a data broadcast service, a method of supporting backward compatibility thereof, and a computer program recording a program for realizing the method. To provide a record medium.

3. Summary of Solution to Invention

According to an aspect of the present invention, there is provided a method of supporting forward compatibility applied to a data broadcasting receiver, the method comprising: monitoring, by a forward compatibility processor, whether a download data information descriptor exists in a received broadcast stream to determine download data; Confirming, by the forward compatibility processor, identification information of a data format from the download data information descriptor, and determining whether to download according to the type and state of the download data; And an upgrade step of downloading, by the forward compatibility processor, the upgrade software for which the download decision is made, and upgrading according to the type of downloaded software.

4. Important uses of the invention

The present invention is used for data broadcasting services.

Description

Data broadcasting apparatus and its method of supporting a forward compatibility}

The present invention provides a data broadcasting receiver and a method for supporting backward compatibility thereof for downloading and installing upgrade software transmitted through a broadcasting network at any time during data broadcasting, regardless of terrestrial or satellite broadcasting network. The present invention relates to a computer-readable recording medium having recorded thereon a program.

In the digital broadcasting era, various standards are used according to media such as terrestrial, satellite, and wired or different regions, and according to user's convenience or operator's demand, the standard will be gradually developed while adopting new technology. For example, there are various standards for digital broadcasting standards such as Advanced Television Systems Committee (ATSC), Digital Video Broadcasting (DVB) in Europe, and OpenCable (OpenCable). These standards need to accommodate these technologies with the emergence of new standards such as MPEG-4, MPEG-7 and MPEG-21.

However, the digital broadcast receiver requires a very long time to be distributed once. Therefore, if a user additionally needs to purchase a broadcast receiving apparatus having a function every time a new service is introduced, the service introduction speed may be too slow to deteriorate the business performance and may impose an economic burden on the user.

In order to overcome this disadvantage, the software to be added due to a new service to the broadcast receiving apparatus should be able to be upgraded after downloading through a broadcasting network or a communication network.

The digital broadcast receiver having such a software downloadable structure is not only advantageous for introducing a new service, but also easily adaptable to various media and regions using the same platform. As a result, consumers do not need to purchase a separate broadcast receiver according to the medium or region, thereby reducing the burden of additional costs, and as a provider, a new service can be provided based on large broadcast receivers. This is reinforced.

In this regard, there are receivers for digital broadcasting that provide basic digital A / V (Audio / Video) processing and provide upgrade functions by software download. However, these receivers support various multimedia data processing or improve performance. There is a problem that an additional upgrade is not easy.

In summary, in recent years, digital broadcasting receivers have been actively researched as digital broadcasting receivers are able to process high-quality AV programs and data broadcasting providing various multimedia contents. In this regard, as the emergence of new technologies and services in a data broadcasting environment in which various standards exist according to a broadcasting medium and a method, there is a need for a new receiver capable of accommodating them. However, in general, since a digital receiving apparatus once distributed in a home is not easily upgraded, even if a new broadcasting service is provided, it cannot be actively accommodated.

Therefore, in the current technical field, there is a need for a data broadcast receiving apparatus that can process various multimedia data and can easily accommodate new broadcasting technologies and services. In particular, there is an urgent need for a method of downloading and installing software for upgrading the performance and function of a data broadcasting receiver through a terrestrial broadcasting network.

The present invention has been proposed to meet the above-mentioned requirements, and a digital broadcast receiver and a forward compatibility support method thereof capable of upgrading software of a receiver at any time in accordance with various service types that may occur in a data broadcast service. Another object of the present invention is to provide a computer-readable recording medium having recorded thereon a program for realizing the above method.

In order to achieve the above object, the present invention provides a data broadcast receiving apparatus for receiving and tuning / demodulating a terrestrial radio frequency (RF) signal, and for classifying each bitstream into audio, video, content, and download data. Tuning / demultiplexing means; Storage means for storing audio, video, content and download data separated from the RF tuning / demultiplexing means; Control means for controlling each module of the apparatus and for processing the content separated by the RF tuning / demultiplexing means; MPEG A / V decoding means for decoding MPEG audio / video (A / V) data separated by the RF tuning / demultiplexing means; Audio output means for outputting MPEG audio data decoded by the MPEG A / V decoding means; Video output means for synthesizing the MPEG video data decoded by the MPEG A / V decoding means and the content data processed by the control means; Graphic processing means for graphic processing the data stored in the storage means through the control means; Forward compatible processing means for determining a software module to be upgraded through the download data and for performing an upgrade according to the state of each module; And peripheral control means for controlling an input device or a device for external connection.

In addition, the present invention provides a method for supporting backward compatibility applied to a data broadcasting receiver, comprising: monitoring, by a forward compatibility processor, whether a download data information descriptor exists in a received broadcast stream to determine download data; Confirming, by the forward compatibility processor, identification information of a data format from the download data information descriptor, and determining whether to download according to the type and state of the download data; And an upgrade step of downloading the upgrade software determined by the forward compatibility processor to upgrade according to the downloaded software.

On the other hand, the present invention provides a data broadcast receiving apparatus having a processor for supporting forward compatibility, the function of monitoring the presence or absence of a download data information descriptor in the received broadcast stream to determine the download data; Checking identification information on a data format from the download data information descriptor to determine whether to download according to the type and state of the download data; And a computer-readable recording medium having recorded thereon a program for realizing a function of downloading and upgrading the downloaded upgraded upgrade software according to the type of downloaded software.

The present invention intends to download and install the transmitted software regardless of the terrestrial or satellite broadcasting network in order to upgrade the performance and function of the data broadcasting receiving apparatus at any time. In other words, the data broadcasting middleware, the plug-in, and the receiver system software will be upgraded at any time while the data broadcasting is being viewed.

To this end, the present invention first receives the terrestrial RF signal from the RF tuner / demultiplexer, performs a tuning and demodulation process, and classifies each bitstream into audio, video, content, and download data. At this time, the classified video / audio is output through the video output unit and the audio output unit through the MPEG-2 A / V decoder, and the content is processed by the processor (software operation unit) to output the graphic processor, the video output unit, and the audio output. Is output via negative. Finally, the forward compatibility processor determines the software modules to be upgraded based on the download data and performs the upgrade process according to the state of each module.

According to the present invention, the software of the receiving apparatus can be upgraded according to various service types that may occur in the data broadcasting service.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of an embodiment of a data broadcast receiving apparatus supporting forward compatibility according to the present invention.

As shown in FIG. 1, a data broadcast receiver supporting forward compatibility according to the present invention receives and tunes / demodulates a terrestrial radio frequency (RF) signal, and performs audio and video for each bitstream. , An RF tuner / demultiplexer 12 for classifying content and download data, and a storage unit 14 for storing audio, video, content, and download data separated from the RF tuner / demultiplexer 12. And a processor unit (software operation unit) 11 for controlling each module of the receiving device and processing the content separated by the RF tuner / demultiplexer 12, and the RF tuner / demultiplexer 12 MPEG-2 A / V decoding unit 13 for decoding separated MPEG-2 audio / video (A / V) data and MPEG-2 audio data decoded in MPEG-2 A / V decoding unit 13 Audio output section 17 and MPEG-2 A / V decoding section 13 for outputting The video output unit 16 for synthesizing the decoded MPEG-2 video data and the content data processed by the processor unit 11 and outputs the data stored in the storage unit 14 through the processor unit 11 A graphic processor 15 for processing, a software module to be upgraded through download data, a forward compatible processor 19 for performing an upgrade according to the state of each module, and an input device such as a keyboard, a mouse and a remote controller And a peripheral unit 18 for controlling a device for external connection via a modem, LAN, or the like.

The operation of the data broadcast receiving apparatus supporting forward compatibility according to the present invention having the above configuration will now be described.

First, the RF tuner / demultiplexer 12 receives a terrestrial RF signal, undergoes tuning and demodulation, and performs audio, video, content, and download for each bitstream. Classify as (download) data. At this time, the classified video / audio is output through the video output unit 16 and the audio output unit 17 through the MPEG-2 A / V decoder 13, respectively. In addition, the content is processed through the processor unit (software operation unit) 11 and provided for the data broadcasting service via the graphic processor 15, the video output unit 16, and the audio output unit 17. Finally, through the download data, the forward compatibility processor 19 determines the software modules to be upgraded and performs the upgrade process according to the state of each module.

The download data may be classified into three types as shown in Table 1 below. Accordingly, the upgrade process may be performed by differently operating the forward compatibility processor 19.

division Download data type  Middleware upgrade  Middleware module  Middleware plug-in  Plug-in software  OS upgrade  Operating system modules

That is, a receiver supporting forward compatibility downloads software necessary for upgrading performance and functions through a broadcasting network. In this case, the upgrade software includes software for improving the middleware performance of the receiving apparatus, plug-in software for adding new functions to the middleware, and software for upgrading a part of the operating system module including a device driver.

Receiving devices that support this forward compatibility can download software necessary to upgrade performance and functions through the wired and wireless Internet as well as the broadcasting network.If the power is turned on after the power is turned off, It can be downloaded continuously from the downloaded part.

In the case of using an ATSC (Advanced Television Systems Committee) based broadcasting network, the operation of the forward compatible processor 19 will be described in detail as follows.

First, the forward compatibility processor 19 performs a PMT (Program Map Table) in an MPEG-2 format broadcast stream received through a broadcast network to determine whether data received by the receiver is download software for forward compatibility processing. Check it. According to the MPEG-2 system standard (ISO 13818-1), PMT is defined as shown in Table 2 below.

This is to check whether there is a data service table (DST) in the broadcast stream. The inspection of the existence of the DST in the PMT can be performed as follows according to the A / 90 Data broadcasting Specification, which is an ATSC standard. NO. Of Table 2 above. If stream_type of 2 has a value of 0x95, we can see that DST exists. In addition, through elementary_PID, the section in which the actual DST exists can be found to obtain information on the download software.

If there is no DST, define and use a decriptor that can inspect it in the PMT itself. In the present invention, the descriptor used when there is no DST is defined and used as DSMCC_DownloadSoftware_descriptor in [Table 3] below. The position of this descriptor is set to NO. It is located at 9. At this time, according to the MPEG-2 system standard (ISO 13818-1), stream_type uses a value indicating a DSM-CC section in which download software is loaded.

In Table 3, "descriptorTag" has a unique value that can distinguish DSMCC_DownloadSoftware_descriptor in a received broadcast stream.

In addition, "descriptorLength" has a value for indicating the length of information shown below.

In addition, "OUI" represents a value for indicating the unique information of the agency as defined in IEEE 802-1990, which has a unique value that can distinguish the terminal manufacturer.

In addition, "Update_version" has a version information value of the received download software.

In addition, the "DownloadSoftware_Type" has a value that can distinguish the type of the received download software, this value may be used as shown in Table 4 below.

In addition, if there is information related to the DST in the PMT, the receiver finds the DST and uses the information to determine and install the download software.

The method first references the application_id_description field in the DST. If there is download software in the received broadcast stream, this field distinguishes the download software by setting a value between 0x8000 and 0xFFFF, which is a user-defined part in [Table 5] below.

Next, the action_type field of the information in the DST is referred to to identify the type of download software. This field is identified through user defined values in [Table 6] below. This user defined value is divided into the above [Table 4].

In the present invention, a method of transmitting download software uses an asynchronous data carousel based on the DSM-CC download protocol, which is an ATSC download protocol.

Finally, according to the analysis contents of the forward compatible processing unit 19, the download software is stored in the storage unit 14 after processing the DSM-CC section. The stored download software is then processed by the forward compatibility processor 19.

Then, when the download software is received, look at how the forward compatibility process is performed in the receiving device as follows.

First, the forward compatibility processor 19 continuously monitors the DST of the broadcast stream, and searches for the contents if there is download software information. Basic download software information in the present invention is described in DSMCC_DownlaodSoftware_Descriptor in PMT when DST does not exist and application_id_descriptor, action_type, protocol_encapsulation in DST when DST exists.

For example, if there is no information on the DST in the PMT, the DescriptorTag of DSMCC_DownloadSoftware_Descriptor shows that the download software is loaded on the DSMCC. If application_id_descriptor is 0x8001, this application is recognized as download software, and the type of download software is determined according to action_type.

In Table 4, values are determined according to the type of download software.

If DownloadSoftware_Type or action_type is 0x41 and the download software is a middleware module, the version information of the existing middleware module is checked.

As a result of the check, if the middleware module to be downloaded is the same version as the existing middleware module, the download process is stopped.

As a result of the inspection, when the version of the middleware module to be downloaded is higher than the version of the existing middleware module, the middleware module is extracted from the broadcast stream and stored in the storage unit 14. At this time, the forward compatibility processor 19 installs the middleware module if there is no application running on the middleware, and if there is an application to be executed, suspends the application and installs the middleware module. After the middleware installation is completed, the application state is checked and the application is restarted when the application is in a paused state.

On the other hand, if the DownloadSoftware_Type or action_type is 0x42 and the download software is middleware plug-in data, the Multipurpose Internet Mail Extensions (MIME) format is compared with the list of MIME types in the forward compatibility processor 19 to indicate the type of application data to be used for the plug-in data. do.

As a result of the comparison, when the download software is registered in the existing list, the plug-in process is stopped. In contrast, when the download software has a new MIME format, data for the middleware plug-in is extracted from the broadcast stream and stored in the storage unit 14. Thereafter, the forward compatibility processor 19 installs the plug-in software, registers with the new MIME type, and returns to the first step.

On the other hand, if DownloadSoftware_Type or action_type is 0x43, this means that the download software is an operating system module, and the forward compatibility processor 19 checks the version information of the operating system module.

As a result of the inspection, when the version of the download software is higher than the version of the operating system module, the operating system module is extracted from the broadcast stream and stored in the storage unit 14. Subsequently, the forward compatibility processor 19 determines whether the operating system is in the upgrade mode, and if not in the upgrade mode, switches the receiving device to the upgrade mode and installs the operating system module. After installation of the operating system module, restart the receiver.

Version information on the installed middleware and operating system modules and information on a receiver capable of processing the download software are described in a field of compatibility_descriptor format.

As described above, the backward compatible receiver may process various multimedia data received through a broadcast network through a plug-in function. In addition, the middleware or the operating system can be upgraded to easily accommodate the data broadcasting standard that can be changed.

Now, referring to FIG. 2, a process of interaction between the forward compatible processor 19 and the processor 11 performing upgrade for each download data is as follows.

In FIG. 2, the processor unit (software operation unit) 11 is divided into a middleware unit 21 and an operating system unit 22, and operates in conjunction with the forward compatibility processor 19.

The forward compatibility processor 19 receives the control signal 201 from the middleware unit 21 and transfers the module 202 for middleware upgrade from the memory and the software 203 for plug-in to the middleware unit 21. .

At this time, when upgrading the middleware unit 202, the forward compatibility processor 19 checks whether the middleware unit 21 is operating through the control signal 201. Thus, if the middleware unit 21 is in operation, it is suspended, and the middleware unit 21 sends a control signal 206 to the operating system unit 22 to suspend resources allocated for the operation by the middleware unit 22. . On the other hand, when the operating system unit 22 notifies the middleware unit 21 again through the control signal 206 of the idle state of the operating system resources, the middleware unit 21 is completely in the idle state. Then, the middleware unit 21 notifies the forward compatible processor 19 via the control signal 201, and the forward compatible processor 19 transfers the module 202 for the middleware upgrade to the middleware 21. To upgrade.

On the other hand, when transmission of the module 202 for middleware upgrade to the middleware unit 21 is finished, the forward compatibility processor 19 receives a signal for resuming the operation of the middleware unit 21 through the control signal 201. Send it.

In addition, when the plug_in software 203 for the middleware plug-in (plug_in) is installed, the forward compatibility processor 19 delivers the middleware plug_in irrespective of the state of the middleware unit 21, and the installation is performed by the middleware unit 21. Do it.

Finally, in the case of upgrading the operating system module, the forward compatibility processor 19 sends a control signal 204 to the operating system unit 22 to set the operating system to the upgrade mode, and receives the status of the operating system. Subsequently, when the operating system module 205 is transferred to the operating system unit 22 in the upgrade mode and the upgrade of the operating system unit 22 is completed, the control signal 204 to set the operating mode to the operating system unit 22. To send the operating system back to operation.

3 is a flowchart illustrating a method of supporting backward compatibility according to the present invention, and illustrates an operation procedure of the forward compatibility processor 19 for downloading and installing upgrade software transmitted through a broadcasting network to a data broadcasting receiver.

First, the forward compatibility processor 19 continuously monitors the broadcast stream (301), and if there is a downloadable data information descriptor (302), searches for the content (302).

Here, the download data information descriptor in the broadcast stream includes the program specific information (PSI) of the MPEG-2 system, the data service table (DST) of ATSC data broadcasting, and the AIT (DVB-MHP) of the multimedia home platform (ASI). Service Descriptor Table).

If the download data information descriptor does not exist (302), it returns to the broadcast stream monitoring step 301 again.

Search the download data information descriptor (303), check whether there is identification information about the data format of the download software (304), and if the identification information of the download data does not exist, return to the broadcast stream monitoring step 301 again, If the identification information exists, the information is stored in the storage unit 14 (305).

Thereafter, the type of download data is determined using the stored identification information (306).

As a result of the determination, when the download software is the middleware module, the version information of the middleware module that is previously installed is inspected (307).

As a result of the check, if the middleware module to be downloaded is the same as the version of the existing middleware module, the download process is stopped and the process returns to the broadcast stream monitoring step 301.

As a result of the check, if the version of the middleware module to be downloaded is not the same as the version of the existing middleware module (especially, if the version of the middleware module to be downloaded is higher than the version of the existing middleware module), the middleware module is extracted from the broadcast stream and the storage unit ( 14) (308).

Next, check whether there is an application that is running on the middleware (309), install the middleware module if there is no application (310), if there is an application to run and pause the application (311) after the middleware module Install (310).

When the middleware installation is completed (310), the state of the application is checked (312), if the application is in a pause state, the application is restarted (313), and then the broadcast stream monitoring step 301 is returned.

As a result of the determination, when the download software is an operating system module, version information of the operating system module is checked (314).

As a result of the check, if the version of the operating system module is the same as the version of the download software, the download process is stopped and the process returns to the broadcast stream monitoring step 301.

As a result of the inspection, when the version information of the operating system module and the download software version are different (especially, when the version of the download software is higher than the version of the operating system module), the operating system module is extracted from the broadcast stream and stored in the storage unit 14. (315).

Next, it is determined whether the receiver is in the operating system upgrade mode (316), and if not in the upgrade mode, the receiver is switched to the upgrade mode (317) and then the operating system module is installed (318). Install 318. When the installation of the operating system module is completed (318) after switching to the operating system mode (319) and returns to the broadcast stream monitoring step 301 again.

As a result of the determination, when the download software is middleware plug-in data, a list of format formats (eg, MIME (Multipurpose Internet Mail Extensions)) format described in order to indicate the type of application data to be used for the plug-in data (eg For example, MIME type list) is compared (320).

As a result of the comparison, if the download software is registered in the existing list, the plug-in process is terminated and the process returns to the broadcast stream inspection step 301.

As a result of the comparison, when the download software has a new MIME format, data for the middleware plug-in is extracted from the broadcast stream and stored in the storage unit 14 (321). Thereafter, the plug-in software is installed and registered in the new MIME type (322), and the process returns to the broadcast stream inspection step (301).

The method of the present invention as described above may be implemented as a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.).

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

The present invention as described above, by supporting the plug-in function in the data broadcast receiver can handle a variety of multimedia data received through the broadcast network, easily adapt to the data broadcast receiver specification that can be changed at any time by upgrading the middleware or operating system This has the effect of providing a function that supports forward compatibility. In addition, the present invention may have the following effects in three aspects of a user, a broadcaster, and a receiver operator in economic terms.

First, if the receiver is required to upgrade frequently, the user can obtain a reduction in purchase cost in the long term.

Second, if a broadcaster wants to improve the quality of broadcasting through various data broadcasting services, it can gain a lot of benefits by reducing the time loss of distributing a receiving device that supports it.

Third, in terms of the receiver operator, a lot of human resources can be saved for the maintenance and repair of the receiver.

1 is a block diagram of an embodiment of a data broadcast receiving apparatus supporting forward compatibility according to the present invention.

FIG. 2 is a diagram illustrating an embodiment of an interoperation process between the forward compatible processor and the processor of FIG. 1 according to the present invention; FIG.

3 is a flowchart illustrating an embodiment of a method for supporting forward compatibility according to the present invention;

* Explanation of symbols for the main parts of the drawings

11 processor 12 RF tuner / demultiplexer

13 MPEG-2 A / V Decoding Unit 14 Storage Unit

15 graphics processing unit 16 video output unit

17: audio output unit 18: peripheral unit

19: forward compatible processing unit

Claims (12)

In the forward compatibility support method applied to a data broadcast receiver, Monitoring, by the forward compatible processor, the presence or absence of a download data information descriptor in a received broadcast stream to determine download data; Confirming, by the forward compatibility processor, identification information of a data format from the download data information descriptor, and determining whether to download according to the type and state of the download data; And An upgrade step of downloading the upgrade software for which the forward compatibility processor is determined to download and upgrading according to the type of the downloaded software; Forward compatibility support method of a data broadcast receiving device comprising a. The method of claim 1, The forward compatible processor, In order to determine whether the data being received by the data broadcast receiving apparatus is download software for forward compatibility processing, the program map table (PMT) is examined in the video broadcast stream received through the broadcast network, and the data service table in the broadcast stream is checked. (DST) checks for the presence of If there is no information on the DST in the PMT, define a descriptor (DSMCC_DownloadSoftware_descriptor) that can check it in the PMT, and the download software is loaded on the Digital Broadcasting Standard (ATSC) Download Protocol (DSM-CC) as a DescriptorTag. You can determine the type of download software with DownloadSoftware_Type, When the DST is present in the PMT, when the protocol_encapsulation is 0x0D and the application_id_descriptor is 0x8001, the application is recognized as the download software, and the forward compatibility support of the data broadcasting receiver is determined according to the action_type. Way. The method according to claim 1 or 2, The upgrade step, If the data to download is a middleware module (that is, if the DownloadSoftware_Type or action_type is 0x41 and the download software is a middleware module), Checking version information of a middleware module that is previously installed; Stopping the download process if the version of the middleware module to be downloaded and the existing middleware module are the same, and extracting the middleware module from the broadcast stream if the versions are not the same; Checking whether there is an application running on the middleware, installing the middleware module if there is no application to be executed, and installing the middleware module after suspending the application if there is an application to be executed; And Checking the status of the application and restarting the application if the application is in a paused state Forward compatibility support method for a data receiving apparatus comprising a. The method according to claim 1 or 2, The upgrade step, If the data you are downloading is an operating system module (that is, if DownloadSoftware_Type or action_type is 0x43 and the download software is an operating system module), Checking version information of an operating system module; Stopping the downloading process if the version of the operating system module is the same as the version of the download software, and extracting the operating system module from the broadcast stream if the version is not the same; And Determining whether the receiving device is in the operating system upgrade mode, and if not in the upgrade mode, converts the receiving device to the upgrade mode and installs the operating system module, and in the upgrade mode, immediately installs the operating system module and then switches to the operating system mode. Forward compatibility support method of a data broadcast receiving device comprising a. The method according to claim 1 or 2, The upgrade step, If the data you download is a middleware plug-in module (that is, if DownloadSoftware_Type or action_type is 0x42 and the download software is middleware plug-in data), Comparing the described format format with a list of format formats in the receiving device to inform the application data type to be used for the plug-in data; Ending the plug-in process when the download software is registered in the existing list as a result of the comparison, and extracting data for the middleware plug-in from the broadcast stream when the download software has a new format; And Steps to install the plug-in software and register it in a new format Forward compatibility support method of a data broadcast receiving device comprising a. The method according to claim 1 or 2, The data broadcast receiver, When downloading the software through the broadcasting network, when the power is turned off (off), when the power is turned on (on), when the power is off, the forward compatibility support method of the data broadcast receiving apparatus characterized in that the download from the download portion. The method of claim 6, The data broadcast receiving apparatus, A method of supporting forward compatibility of a data broadcasting receiver, which can download software necessary for upgrading performance and functions through a wired or wireless Internet. In the data broadcast receiving apparatus, RF tuning / demultiplexing means for receiving terrestrial radio frequency (RF) signals to tune / demodulate and classify each bitstream into audio, video, content, and download data; Storage means for storing audio, video, content and download data separated from the RF tuning / demultiplexing means; Control means for controlling each module of the apparatus and for processing the content separated by the RF tuning / demultiplexing means; MPEG A / V decoding means for decoding MPEG audio / video (A / V) data separated by the RF tuning / demultiplexing means; Audio output means for outputting MPEG audio data decoded by the MPEG A / V decoding means; Video output means for synthesizing the MPEG video data decoded by the MPEG A / V decoding means and the content data processed by the control means; Graphic processing means for graphic processing the data stored in the storage means through the control means; Forward compatible processing means for determining a software module to be upgraded through the download data and for performing an upgrade according to the state of each module; And Peripheral control means for controlling input devices or devices for external connection Data broadcast receiver that supports forward compatibility including a. The method of claim 8, The control means, A middleware unit configured to process data broadcasting, exchange control signals and data with the forward compatible processor, and exchange control signals with an operating system unit; And An operating unit for operating the receiver, exchanging control signals and data with the forward compatible processing means, and exchanging control signals with the middleware unit; Data broadcast receiver supporting forward compatibility, including The method of claim 8, The download data, A data broadcasting receiver supporting forward compatibility, comprising an entire middleware or a part of a middleware module, a middleware plug-in module, and an operating system module including a device driver. The method according to any one of claims 8 to 10, The forward compatibility processing means, In order to determine the download data, the presence or absence of a download data information descriptor in the broadcast stream is monitored, and identification information on the data format is confirmed by the download data information descriptor, and the download or not is determined according to the type and state of the download data. And a data broadcasting receiver supporting forward compatibility, wherein the upgrade software is downloaded and upgraded according to the downloaded software. In order to support forward compatibility, to a data broadcast receiving apparatus having a processor, A function of monitoring the presence or absence of a download data information descriptor in a received broadcast stream to determine download data; Checking identification information on a data format from the download data information descriptor to determine whether to download according to the type and state of the download data; And A function of downloading the upgrade software determined by the download and upgrading according to the type of the downloaded software. A computer-readable recording medium having recorded thereon a program for realizing this.