KR101181777B1 - Broadcasting system and method - Google Patents

Abstract

The present invention relates to a broadcast system and method for transmitting and receiving mobile broadcast. In particular, the present invention transmits the middleware control information that can control the access to the mobile broadcast service in the form of a transport stream together with the mobile broadcast service, so that the receiver receives the corresponding middleware based application according to the middleware control information transmitted in the form of a transport stream. By controlling the execution of, it is possible to control the access of broadcast content.

Middleware, section, PMT

Description

Broadcasting system and method

1 is a diagram of the present invention showing an example of a DMB system structure for explaining the MPEG-4 system;

2 is a diagram of the present invention showing an example of a PAT syntax structure;

3 is a diagram of the present invention showing an example of a PMT syntax structure;

4A to 4C illustrate examples of an IOD field, a stream type field, and a stream map table in the PMT syntax of FIG. 3.

5 illustrates a data structure of a section including middleware control information according to an embodiment of the present invention.

FIG. 6 illustrates an embodiment of a middleware control information descriptor included in the section of FIG. 5. FIG.

7 is a flowchart illustrating an operation of extracting middleware control information according to the present invention.

The present invention relates to a broadcast system, and more particularly, to an apparatus and method for transmitting / receiving a mobile broadcast.

Digitalization of broadcasting is progressing rapidly through existing media such as terrestrial, satellite, and cable broadcasting, and is revolutionizing the environment of the broadcasting industry. A new medium that has emerged due to such environmental changes is mobile broadcasting.

The mobile broadcast is a very attractive broadcast service in that it provides convenience of movement in addition to the advantages of the existing digital TV broadcast.

That is, there are various types of mobile broadcasts for providing high quality voice and video services anytime, anywhere, even while driving or walking, depending on the compression method, transmission method, and applied technical standards. For example, satellite DMB (Digital Multimedia Broadcasting) Terrestrial DMB, Digital Video Broadcasting-Handheld (DVB-H), media flow, and ISDB-Tsb. In addition to a dedicated terminal, a receiver capable of receiving the mobile broadcast includes a terminal coupled with a product such as a mobile phone, a PDA, a PMP, a notebook computer, a vehicle terminal, and the like. Therefore, the user can use not only the broadcasting but also the service combined with the functions of the terminal.

In the case of the terrestrial DMB, Eureka-147 Digital Audio Broadcasting (DAB) adopted as a European terrestrial radio standard is adopted as a transmission standard. In addition, the terrestrial DMB adopts MPEG-4 AVC as a video encoding standard, MPEG-4 BSAC as an audio encoding standard, MPEG-2 as a multiplexing standard, and MPEG-4 as a video / audio synchronization standard.

When such terrestrial DMB service is activated, through a broadcast receiver capable of receiving terrestrial DMB service, not only CD audio quality digital audio service but also mobile TV, traffic broadcasting service (TPEG), web service (BWS), DMB-Commerce Various data services such as this can be provided

Terrestrial DMB middleware is being developed in order to shorten the development period of the contents provided to such a terrestrial DMB service and to facilitate the contents development and to be widely used in various DMB terminals.

The terrestrial DMB middleware refers to additional dedicated software existing in system software of a broadcast receiver capable of receiving terrestrial DMB services. In this case, the additional-only software exists in the form of supporting a user and a provider service rather than a general application, and is composed of numerous application programming interfaces (APIs) and execution engines. The terrestrial DMB middleware is expected to be used as a platform for two-way broadcast communication service in combination with mobile phones in the future, and according to the relevant standardization direction, it will have a significant impact on broadcast / mobile communication receiving terminal and application industry of broadcast communication.

In the terrestrial DMB middleware, an application refers to software that operates using the API and its execution engine.

One of the applications that can be executed on the terrestrial DMB middleware is a personal video recorder (PVR) application. In other words, the DMB terminal is provided with a storage device such as a memory card or a disk (HDD), and records a broadcast content provided by a transmitter by using any one of a reservation and an immediate recording, and reproduces it at a desired time.

The DMB terminal executes a PVR application on the middleware to easily record the transmitted broadcast content and play it back at a time desired by the user.

However, when the broadcast receiver can easily access the broadcast content, there is a problem that the broadcast content can be recorded or reproduced without permission. In particular, a free broadcast service such as terrestrial DMB can easily record broadcast content and play it back at a convenient time, but there is a problem that the copyright of the broadcast content cannot be protected.

Therefore, in this case, the middleware control information for controlling the execution of the PVR application running on the middleware is required for copyright protection of the broadcast content.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an apparatus and method for transmitting / receiving middleware control information for controlling execution of a specific application running on middleware.

Another object of the present invention is to provide an apparatus and method for protecting copyright of broadcast content in a broadcast receiver having a storage medium.

In order to achieve the above object, the transmission method according to the present invention comprises the steps of generating middleware control information for controlling the execution of the middleware-based application; Multiplexing and converting the middleware control information and the mobile broadcast service into transport stream (TS) packets having a packet-specific number for each stream; And transmitting the multiplexed data through a main service channel.

The middleware control information is generated in a table structure including at least one section.

The section structure of the middleware control information is a private section structure.

The unique number (PID) of the transport stream (TS) packet including the middleware control information is included in the program map table (PMT).

The middleware control information may include authority information for setting at least one right in the mobile broadcast service.

The rights information may include at least one of recording, playback, and copy related rights information.

According to the present invention, there is provided a transmission system comprising: an MPEG-4 system which compresses and encodes a mobile broadcast service by a corresponding compression algorithm and packetizes it into an MPEG-4 SL (Sync Layer); Create middleware control information for controlling the execution of middleware-based applications in a section structure, control the middleware of the section structure after packetizing a mobile broadcast service packetized to SL in a packetized elementary stream (PES) in the MPEG-4 system An MPEG-2 system for converting multiplexing information and a mobile broadcast service of a PES packet into transport stream (TS) packets, respectively; And an Eureka system for transmitting the multiplexed data through the main service channel in the MPEG-2 system.

The receiving method according to the present invention comprises: filtering transport stream (TS) packets having a unique number (PID) of middleware control information for controlling execution of a middleware based application from the multiplexed transport stream (TS); Collecting the filtered transport stream (TS) packets to form a middleware section including middleware control information; And extracting and storing middleware control information by analyzing the middleware section.

According to an aspect of the present invention, there is provided a reception system including: a broadcast reception unit for demodulating data received through a main service channel and outputting the data in a transport stream (TS) form; And a middleware control information extractor for extracting middleware control information by filtering transport stream (TS) packets having a unique number (PID) of middleware control information for controlling execution of a middleware-based application from the transport stream (TS). Characterized in that it comprises a.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments taken in conjunction with the accompanying drawings.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. At this time, the configuration and operation of the present invention shown in the drawings and described by it will be described as at least one embodiment, by which the technical spirit of the present invention and its core configuration and operation is not limited. .

In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the description thereof will be omitted.

In addition, the terminology used in the present invention is a general term that is currently widely used as much as possible, but in some cases, the term is arbitrarily selected by the applicant. It is intended that the present invention be understood as the meaning of the term rather than the name.

There are many types of applications that usually run on middleware. For example, there is a music information application, a URL-linked application, an EPG application, and a PVR application. There is a need for middleware control information that can control the execution of such applications. For example, in the case of a PVR application, middleware control information for protecting copyright of broadcast content is required.

The present invention is to transmit and receive such middleware control information through the main service channel in the DMB transmission frame.

In particular, the present invention is to multiplex the middleware control information in the form of MPEG-2 transport stream (TS) in the MPEG-2 system to transmit and receive through the main service channel in the DMB transmission frame.

In the present invention, a process of transmitting and receiving middleware control information for controlling execution of a PVR application will be described as an embodiment.

At this time, since the application running on the middleware and the middleware control information necessary for each application may be added afterwards, the present invention will not be limited to the above embodiments.

1 illustrates an example of a structure of a DMB system for transmitting / receiving middleware control information according to the present invention, and includes an MPEG-4 system, an MPEG-2 system, and an Eureka system. In the DMB system, if the arrow direction is shown in FIG. 1, the broadcast transmitter is used. If the arrow direction is reversed, the broadcast receiver is used.

In other words, MPEG-4 was developed for mobile reception to ensure high quality program reception in fixed and mobile reception environments, and can be delivered through mobile terminals (eg, vehicle terminals, mobile phones, PDAs). It can serve as a medium for providing mobile broadcasting services. That is, when the mobile terminal is equipped with a DMB receiver or a DMB receiving pack, the mobile terminal can decode and display the MPEG-4 encoded video. Then, the user can receive various multimedia services through a mobile phone or a PDA.

In the MPEG-4 scheme, a video signal is encoded based on contents of a video. That is, the MPEG-4 method uses a content representation method based on content, and processes the screen into video objects having attributes of shape information, motion information, and texture information. The content-based image presentation method establishes the interrelationships between objects in various multimedia applications to facilitate their access and manipulation. In other words, the object-oriented interactive function in MPEG-4 handles the object elements of the picture or sound independently in multimedia data access, and combines them by linking with each other, allowing the user to freely configure the picture or sound. For example, processing such as replacing only the main character with the background on the screen previously possible only in the production stage, but in the MPEG-4 user stage.

To this end, as shown in FIG. 1, the transmitting side compresses and encodes various DMB services in the MPEG-4 system and then transmits the metadata to the MPEG-2 system together with the meta information. That is, in the MPEG-4 system, video is compressed and encoded using MPEG-4 / AVC (Advanced Video Coding) (MPEG-4 Part 10), and then packetized into MPEG-4 SL (Sync Layer), and audio is MPEG. After compression coding using -4 / BSAC (Bit Sliced Arithmetic Coding), packetization is performed using MPEG-4 SL. In addition, MPEG-4 BIFS (Binary Format for Scenes) interactive content is packetized in MPEG-4 SL to support object-oriented interactive functions.

In the MPEG-2 TS multiplexer of the MPEG-2 system, the input MPEG-4 data is packetized into a PES format and then divided into a plurality of MPEG-2 TSs having a fixed length. After additional error correction coding is performed in the Forward Error Correction (FEC), the Eureka-147 system transmits the stream through a Main Service Channel (MSC).

In addition, since the MPEG-2 TS transmits a plurality of video and audio individual bit streams, information on which program is to be taken from among a plurality of programs, which packet is to be taken, and how to decode them is required. In other words, in decoding MPEG-2 TS, one of a plurality of programs must be selected and the packet recognition number (PID) of the transport packet of the individual bit stream required for decoding the program must be known. After that, it is necessary to know parameter information or association information of these individual bit streams. For this multi-step operation, a plurality of additional information (PSI) tables are required.

Accordingly, the transmitting side generates program specific information (PSI) such as a program association table (PAT) and a program map table (PMT) of the MPEG-2 TS, and multiplexes the PES packet in the MPEG-2 TS multiplexer.

The PAT is special information transmitted by a packet with PID = 0. That is, the PAT describes the components of the program for each program number, which indicates the PID of the transport packet that transmits the PMT.

In this case, an Initial Object Descriptor (IOD) of the MPEG-4 system standard is included in the PMT.

According to an embodiment of the present invention, the middleware control information is transmitted in the form of MPEG-2 TS packet in the MPEG-2 system. In this case, PID information of the MPEG-2 TS packet including the middleware control information is included in the PMT.

The following describes a process for transmitting and receiving middleware control information of the present invention.

2 illustrates an example of a PAT syntax structure, and provides PID information of a TS packet including information of a program. The PAT is special information transmitted by a packet whose PID is 0, and describes each component of the program for each program number, and indicates a PID of a transport packet that transmits a program map table (PMT).

That is, the program number and the PID of the PMT are found by parsing a PAT table having a PID of 0. In FIG. 2, the program number is 0x0001 and the PID of PMT is 0x0100.

In addition, the PMT obtained from the PAT provides a correlation between components constituting the program as shown in FIG. 3. The PMT describes the program identification number and the PID list and accessory information of the transport packet to which individual bit streams such as video and audio constituting the program are transmitted. That is, the role of the PMT in the MPEG-2 TS is to transmit information about which PIDs are transmitted to the ESs (elementary streams) required to configure one program.

In this case, since terrestrial DMB is transmitted with MPEG-4 content, IOD is included in PMT. That is, when packetizing MPEG-4 compressed and encoded multimedia into MPEG-2 TS, the above-described PMT syntax includes IOD and SL (Sync Layer) descriptor defined in MPEG-4. At this time, the IOD is included in the descriptor () region of the first loop and the SL descriptor is included in the descriptor () region of the second loop.

The IOD informs the profile and level information of the MPEG-4 content transmitted as shown in FIG. 4A. It also includes the ES (Elementary Stream) ID of the OD stream and the ES ID information of the Scene Description (SD) stream.

That is, information about the OD stream and information about the SD stream is described in the ES_descriptor field of the IOD. The IOD serves as a pointer connecting the BIFS and the OD of the SD.

Middleware control information according to the present invention is included in the second loop of the PMT.

Referring to the second loop as shown in FIG. 4B, a stream_type field for identifying whether a stream to be transmitted is transmitted in a packetized elementary stream (PES) type or a section type, a PID (elementary_PID) field of each stream, and a corresponding PID Contains ES ID information.

Therefore, when the PMT information is interpreted, the information of all the programs transmitted to the TS can be obtained.

In other words, the PMT table having a PID of 0x0100 is parsed to find an IOD, and a stream map table (SMT) is generated as shown in FIG. 4C using Elementary_PID and ES_ID of FIG. 4B.

According to an embodiment of the present invention, the middleware control information is transmitted in a section type. In particular, according to an embodiment of the present invention, the middleware control information is transmitted in the form of a private section in order to transmit the middleware control information to the MPEG-2 TS layer.

To this end, as shown in FIG. 4B, a stream type (stream_type) of the middleware control information is assigned a section type and an elementary_PID is assigned an 0x114. That is, the stream type of the section constituting the middleware control information allocates the same value as the private section, that is, 0x05.

Then, the receiving side can find the elementary_PID having the stream type value of 0x05 from the PMT and filter the MPEG-2 TS to obtain middleware control information.

In this case, when transmitting the middleware control information, the SL descriptor is not used.

5 illustrates an example of a syntax structure when transmitting middleware control information in a section format, particularly a private section format, of the MPEG-2 system according to the present invention.

That is, the data structure middleware_section for transmitting middleware control information according to the present invention follows the general private section syntax defined in ISO / IEC 13818-1. In other words, if the middleware control information is to be transmitted in a TS packet having a PID value determined by the PMT in the PAT, a private section must be used. The private section may transmit data in a minimal structure that allows the decoder to analyze the stream. And private tables can consist of multiple private sections that all have the same table_id.

Here, the middleware control information is transmitted in the form of MPEG-2 Transport Stream (TS) packet having a corresponding PID (packet identifier) value. The PID of the middleware control information can be found in the PMT, and the PID of the middleware control information included in the PMT in FIG. 4 is assumed to be 0x0114.

In FIG. 5, 8 bits are allocated to the table_id field, and a unique ID for recognizing that the information transmitted to the table is middleware control information is stored. That is, the table_id field indicates a value indicating that the table to which this section belongs is a table for middleware control information. For example, the table_id field has one of user private values (0x80 to 0xFF).

The section_syntax_indicator field is allocated one bit. At this time, if the value of the section_syntax_indicator field is '1', all tables commonly follow the section structure, and an extension type comes immediately after the private_section_length field. If section_syntax_indicator is '0', only a part of the section structure is followed, and the rest may be changed according to a user's decision.

The private_indicator field is assigned with 1 bit and indicates whether user-defined information is stored in the section middleware_section for the middleware control information, and the private_section_length field is assigned with 12 bits, and after the private_section_length field, the number of bytes remaining until the end of the middleware_section Indicates. The maximum size should not exceed 4093.

When the section_syntax_indicator is '1', 16 bits are allocated to the table_id_extension field following the private_section_length field and can be used by the user.

The version_number field is incremented by 1 from 0 to 31 when there is a change in the information used in the middleware_section.

The current_next_indicator field is assigned with 1 bit. If the field value is '1', the version number field is applied to the current middleware_section, and if '0', the version number is applied to next middleware_section.

The section_number field is allocated 8 bits. The section_number field must be 0 first. The section_number field is incremented by 1 for each additional section.

The last_section_number field is allocated 8 bits and indicates the number of the last section, and the CRC_32 field is an error correction code code (CRC).

In FIG. 5, if the section_syntax_indicator is '0', the middleware_data_byte field including middleware control information comes after the private_section_length field, and if '1', the middleware_data_byte field including middleware control information comes after the last_section_number field.

The middleware_data_byte field is an area that can be defined and used by a user, and includes middleware control information in the present invention.

6 is a syntax structure illustrating an example of a descriptor mate_permission_descriptor () including rights information for copyright protection among middleware control information according to the present invention.

That is, if N sections or private_section_length-9 sections are collected in FIG. 5, the descriptor mate_permission_descriptor () shown in FIG. 6 may be configured.

The descriptor of FIG. 6 includes a descriptor_tag field, a descriptor_length field, a broadcaster_loop_length field, and a loop that repeats as much as the broadcaster_loop_length field value.

In FIG. 6, the descriptor_tag field is assigned with 8 bits, and the information transmitted to the descriptor indicates a unique ID for recognizing the right information for copyright protection.

The descriptor_length field indicates the length information of the current descriptor, and the broadcaster_loop_length field is assigned the number of repetitions of the following loop.

The loop following the broadcaster_loop_length field is repeated by the value of the broadcaster_loop_length field to authorize the broadcast content in units including at least one of a corresponding ensemble, a service, and a service component.

The loop includes a broadcaster_id field indicating a unique number (ID) for identifying broadcast content to be authorized and a permission setting field for setting one or more rights to broadcast content corresponding to the broadcaster_id field value. .

The broadcaster_id field is configured to display an ensemble unique number (ID), a service unique number (ID), and a service component unique number (ID). For example, 64 bits may be allocated.

In this case, a value displayed in the broadcaster_id field may be determined depending on whether the authorization is granted to the entire content range, for example, the entire ensemble, only the specific service in the ensemble, or only the specific service component in the service. Can vary.

For example, if you want to authorize the entire ensemble, only the ensemble ID is displayed in the broadcaster_id field, and a null value is padded at the position where the service ID and the service component ID are displayed. In this case, the rights set in the right setting field following the broadcaster_id field are equally applied to all broadcast content having the ensemble ID.

If only the service within a specific ensemble is authorized, the corresponding ensemble ID and service ID may be displayed in the broadcaster_id field, and a null value may be padded at a position indicating the service component ID. In this case, all broadcast contents having the ensemble ID and service ID have the same authority set in the authority setting field following the broadcaster_id field. That is, even if the ensemble ID is the same, the content set in the authority setting field is not applied to content having a service ID different from the service ID.

The null value may be 0 or F or any value determined by the appointment.

The permission setting field following the broadcaster_id field may include a reserved recording permission setting field, a metadata related permission setting field, an instant recording permission setting field, a normal playback related permission setting field, a delete related permission setting field, a replication related permission setting field, and a trick. And at least one of a mode related permission setting field and a time shift related permission setting field.

In this case, the scheduled recording related authority setting field, the instant recording related authority setting field, and the time shift related authority setting field may be divided into recording related authority, the metadata related authority setting field, the normal playback related authority setting field, the deletion related authority setting field, The trick mode related permission setting field may be divided into a playback related right.

The scheduled recording related authority setting field includes at least one of a scheduled_application_recording_flag field, a read_application_recording_flag field, a modify_application_recording_flag field, and a delete_application_recording_flag field.

The scheduled_application_recording_flag field indicates whether scheduled recording of content corresponding to the broadcaster_id field value is possible.

The read_application_recording_flag field indicates whether reading of previously reserved recording information is possible.

The modify_application_recording_flag field indicates whether modification of previously reserved recording information is possible.

The delete_application_recording_flag field indicates whether the previously reserved recording information can be deleted.

The metadata related permission setting field includes a read_metadata_flag field, and the read_metadata_flag field indicates whether the metadata stored by the application can be viewed.

The immediate recording related right setting field includes at least one of a read_user_recordings_flag field, a read_application_recordings_flag field, a user_record_now_flag field, and an application_record_now_flag field.

The read_user_recordings_flag field indicates whether the content information recorded by the user can be referred to in the recorded content list.

The read_application_recordings_flag field indicates whether the content information recorded by the application can be referred to in the recorded content list.

The user_record_now_flag field indicates whether the content corresponding to the broadcaster_id field value can be immediately recorded by the user.

The application_record_now_flag field indicates whether content corresponding to the broadcaster_id field value can be immediately recorded by an application.

The normal play related permission setting field includes at least one of a play_user_flag field, a play_application_flag field, a preview_user_flag field, and a preview_application_flag field.

The play_user_flag field indicates whether playback of content recorded by a user is possible.

The play_application_flag field indicates whether playback of content recorded by an application is possible.

The preview_user_flag field indicates whether a preview of content recorded by a user is possible.

The preview_application_flag field indicates whether the preview of content recorded by the application is possible.

The deletion-related permission setting field includes at least one of a delete_user_recordings_flag field and a delete_application_recordings_flag field.

The delete_user_recordings_flag field indicates whether the content recorded by the user can be deleted.

The delete_application_recordings_flag field indicates whether the content recorded by the application can be deleted.

The replication related permission setting field includes at least one of a copy_user_recordings_flag field and a copy_application_recordings_flag field.

The copy_user_recordings_flag field indicates whether copying of content recorded by a user is possible.

The copy_application_recordings_flag field indicates whether copying of content recorded by the application is possible.

The trick mode related permission setting field includes at least one of a trickplay_user_flag field and a trickplay_application_flag field.

The trickplay_user_flag field indicates whether trick play of content recorded by a user is possible.

The trickplay_application_flag field indicates whether trick play of content recorded by an application is possible.

The time shift related permission setting field includes at least one of a timeshift_user_flag field and a timeshift_application_flag field.

The timeshift_user_flag field indicates whether content corresponding to the broadcaster_id field value is time shifted by a user.

The timeshift_application_flag field indicates whether content corresponding to the broadcaster_id field value is time shifted by an application. The difference between scheduled recording and instant recording and time shift here depends largely on the time of playback and whether or not it remains on the storage medium for the content being played. That is, the scheduled recording and the instant recording are reproduced from the start position of the storage medium or the position designated by the user, and the reproduced contents are continuously stored in the storage medium. On the other hand, when the time shift end key is input, the time shift is automatically played from the time when the time shift start key is input, and the reproduced contents are automatically deleted from the storage medium.

Each authority flag field described so far is assigned one bit except for the trickplay_user_flag field and the trickplay_application_flag field. At this time, whether to allow the flag field of the 1-bit is '1' or '0'. In the present invention, if the flag field value is '1', the corresponding authority is allowed, and if the flag field is '0', the corresponding authority is denied.

If the trickplay_user_flag field and the trickplay_application_flag field are '0', denying the trick play is allowed. If a value other than '0' is set, the trick play corresponding to the value is possible. Alternatively, if a value other than '0' is set, the value may be set to the maximum speed to enable trick play at a speed lower than that speed. Since this is a designer's option, the present invention will not be limited to the above examples. According to the embodiment of the present invention, the trickplay_user_flag field and the trickplay_application_flag field are allocated 2 bits.

In FIG. 6, the order, location, meaning, and number of additionally allocated fields of each authority flag field may be easily changed by those skilled in the art, and thus the present invention is not limited to the above example.

As such, the middleware control information is included in the PMT having the corresponding PID (packet identifier) value in the form of private section and transmitted through the main service channel (MSC) in the form of MPEG-2 TS.

The middleware control information extraction unit (not shown) for extracting the middleware control information transmitted in the MPEG-2 TS form as described above may be included in the broadcast receiver. The middleware control information extracting unit may be configured only by hardware, only by software, or may be configured by a mixture of hardware and software. In addition, the broadcast receiver includes a receiver for demodulating data received through a main service channel and outputting the data in the form of a transport stream (TS).

7 is a flowchart illustrating an embodiment of a process of extracting middleware control information from the middleware control information extractor.

That is, the middleware control information extracting unit first finds a TS packet including a PAT in the broadcast stream to obtain middleware control information, and interprets the PAT to obtain a PID of the PMT of the corresponding program (step 701). Subsequently, the TST having the PID of the PMT obtained in step 701 is found and the PMT is interpreted (step 702). After the PID of the TS packet including the middleware control information is extracted through the PMT analysis (step 703), the TS packets having the PID value are filtered and collected to analyze the middleware_section (step 704). Subsequently, the middleware_data_byte field included in the middleware_section is interpreted, middleware control information is extracted, and stored in the storage means for use in the corresponding application (step 705).

The copyright-related rights information shown in FIG. 6 provided to the broadcast content in units including at least one of an ensemble, a service, and a service component among the middleware control information may be used for recording, reproducing, and copying operations executed in a middleware-based PVR application. By controlling the copyright of the broadcast content can be protected. That is, the PVR application performs recording, playback, copying, etc. using a middleware engine, for example, an application programming interface (API) operating based on middleware, according to copyright-related authority information granted to broadcast content.

The present invention is not limited to the above-described embodiments, and as can be seen in the appended claims, modifications can be made by those skilled in the art to which the invention pertains, and such modifications are within the scope of the present invention.

According to the broadcast system and method according to the present invention described above, the broadcast receiver can control the access of the broadcast content by receiving the middleware control information transmitted in the TS form and controlling the execution of the corresponding middleware-based application.

In particular, the broadcast receiver of the present invention receives copyright-related rights information among the middleware control information received in the form of TS and records or reproduces the data on the storage medium through an application implemented in the middleware, and copies the data to another storage medium or another broadcast receiver. To determine. By doing so, it is possible to control the recording, reproduction, copying, and the like of broadcast content for which copyright protection is desired.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

Claims (20)

Generating middleware control information for controlling execution of the middleware based application; Multiplexing and converting the middleware control information and the mobile broadcast service into transport stream (TS) packets having a packet unique number for each stream; And Transmitting the multiplexed data through a main service channel. The method of claim 1, The middleware control information is generated in a table structure including at least one section. The method of claim 1, And wherein the section structure of the middleware control information is a private section structure. The method of claim 1, And a unique number (PID) of a transport stream (TS) packet including the middleware control information is included in a program map table (PMT). The method of claim 4, wherein The stream type field in the program map table (PMT) indicates that the transport stream including the middleware control information is in the form of a private section. The method of claim 1, wherein the multiplexing step Compressing and encoding a mobile broadcast service using a corresponding compression algorithm and packetizing the mobile broadcast service into an MPEG-4 sync layer (SL); And And transmitting the packetized mobile broadcast service packetized to the SL into a packetized elementary stream (PES) and outputting the multiplexed packet for multiplexing. The method of claim 1, The middleware control information includes authority information for setting at least one right in the mobile broadcast service. The method of claim 7, wherein The rights information includes at least one of recording, playback, and copy related rights information. 9. The method of claim 8, The recording related authority information includes at least one of scheduled recording, instant recording, and time shift related authority information. 9. The method of claim 8, The play-related authority information includes at least one of normal play and trick play-related rights information. An MPEG-4 system which compresses and encodes a mobile broadcast service using a corresponding compression algorithm and packetizes it into an MPEG-4 SL (Sync Layer); Create middleware control information for controlling the execution of middleware-based applications in a section structure, control the middleware of the section structure after packetizing a mobile broadcast service packetized to SL in a packetized elementary stream (PES) in the MPEG-4 system An MPEG-2 system for converting multiplexing information and a mobile broadcast service of a PES packet into transport stream (TS) packets, respectively; And And a Eureka system for transmitting the multiplexed data through the main service channel in the MPEG-2 system. The method of claim 11, wherein The section structure of the middleware control information is a private section structure. The method of claim 11, wherein The middleware control information includes authority information for setting at least one right in the mobile broadcast service. The method of claim 13, The authority information includes at least one of recording, playback, and copy related rights information. Filtering transport stream (TS) packets having a unique number (PID) of middleware control information for controlling the execution of the middleware based application from the multiplexed transport stream (TS); Collecting the filtered transport stream (TS) packets to form a middleware section including middleware control information; And And analyzing the middleware section to extract and store middleware control information. 16. The method of claim 15, The middleware control information PID is extracted from the program map table (PMT) received in the main service channel. 16. The method of claim 15, The middleware control information includes rights information for setting at least one right in a mobile broadcast service. The method of claim 17, The rights information includes at least one of recording, playback, and copy related rights information. A broadcast receiver for demodulating data received through a main service channel and outputting the demodulated data in the form of a transport stream (TS); And A middleware control information extraction unit for extracting middleware control information by filtering transport stream (TS) packets having a unique number (PID) of middleware control information for controlling execution of a middleware-based application from the transport stream (TS) Receiving system, characterized in that configured to. 20. The method of claim 19, The middleware control information extractor extracts the middleware control information PID from a program map table (PMT) received through the main service channel.

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