KR100871841B1 - Conditional Access Processing Method of respective Objects of Data Broadcasting Service Contents, and DMB Conditional Access Processing System of respective Objects of BIFS Service and MOT service - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a method for processing a conditional reception of data broadcasting service contents by an object, and a system for processing a conditional reception of a DMB for object reception of a BIFS service and a MOT service using the same.

2. The technical problem to be solved by the invention

The present invention provides a data broadcasting service content which enables limited reception individually for each object in the content in a data broadcasting service, in particular, a service transmitted in a BIFS (Binary Format for Scene) service and a multimedia object transfer (MOT) mode. The purpose of the present invention is to provide a method for processing a conditional reception for each object, and a system for receiving a DMB conditional reception system for the conditional reception of a BIFS service and a MOT service using the same.

3. Summary of Solution to Invention

According to the present invention, in a method for processing limited reception for each object of data broadcasting service content, content required for a predetermined data broadcasting service is authored as a separate file for each object, and content for setting object editing information for each of the authored objects. Mastication step; An encoding step of performing encoding according to a corresponding data broadcasting service standard while mapping the edited object file to the edited object file for each authored object file; And a conditional access processing step of performing a limit reception process for each object on the encoded object using the object mapping information set in the encoding step.

4. Important uses of the invention

The present invention is used for the DMB CA system.

DMB, CA, scrambler, descrambler, BIFS, MOT, object, object, object edit information, object mapping information

Description

Conditional Access Processing Method for Objects of Data Broadcasting Service Contents and DMX Conditional Access Processing System for Object-Received Objects of WIP Service and MOT Service Using It Processing System of respective Objects of BIFS Service and MOT service}

1 is a configuration diagram of an embodiment of a terrestrial DMB CA system for scrambling per object of a BIFS service according to the present invention;

2 is a block diagram of an embodiment of a terrestrial DMB CA system for object-based scrambling of a MOT service according to the present invention;

3A and 3B are explanatory diagrams of an example of applying an object-based scrambling and descrambling method according to the present invention.

* Explanation of symbols on the main parts of the drawing

11: Content authoring tool for BIFS service 12: BIFS encoder management and GUI input

13: BIFS Encoder 14: DMB Encoder

15: MPEG-1 Stream Multiplexer 16, 24: CA

17, 25: CAC 21: BWS Content Authoring Tool (author)

22: MOT encoder management and GUI input unit 23: MOT encoder

The present invention provides a method for processing a conditional reception of data broadcasting service contents by object, and a digital multimedia broadcasting (DMB) system for conditional reception of a BIFS (Binary Format for Scene) service and a multimedia object transfer (MOT) service. In more detail, in the data broadcasting service, in particular, the BIFS service and the service transmitted in the MOT mode, each object in the content can be individually received, respectively, subject to the conditional reception processing of the data broadcasting service content The present invention relates to a DMB conditional access processing system for object-based reception of BIFS service and MOT service using the method.

Conditional Access System (CAS) refers to a system that enables a desired program to be received only by legitimate subscribers who have permission to use content for a paid service of T-DMB. Therefore, CAS can scramble data broadcast programs as well as video and audio, thereby providing selective paid services for each program and content.

Currently in Korea, the standardization of terrestrial DMB CAS is progressing. The contents are as follows. In terrestrial DMB, several program data are hierarchically multiplexed and finally, multiplexed in one ensemble data format and transmitted. To apply CA to a specific program, one of three scrambling modes: subchannel mode, data group mode, and multimedia object transfer (MOT) mode, depending on the hierarchy and characteristics of the program. Restricted reception should be applied by selecting.

The 'subchannel mode' scrambles the entire subchannel to which CA is to be applied from among audio subchannels including program associated data (PAD), packet mode data subchannels, and stream mode data subchannels such as DMB video. That's the way.

Meanwhile, the 'data group mode' is used when program data used for IP tunneling, MOT, and transparent data channel (TDC) services are grouped and used as a main service channel (MSC) data group. This is a method of scrambling all or some data groups of a service component.

Finally, 'MOT mode' is a method of scrambling at a MOT level for a file transmitted using a directory mode MOT rather than a header mode MOT.

However, among the above three modes, there is currently no way to scramble BIFS only in DMB video service corresponding to 'sub channel mode'.

In addition, although a scrambling method for a service transmitted to the MOT has been proposed, there is no method for identifying and scrambling information on each object for each content. That is, in the case of the MOT service, although scrambling of some or all of the MOT objects contained in the directory structure of the directory mode is possible, the authoring tool and the authored object for the objectization of the contents that may be required in the commercial service are provided. There is no way to scramble each object individually.

Therefore, in order to satisfy various requirements for contents of users as DMB is activated today, a method that can be scrambled for such a service and an object-specific control method for authored contents are needed.

The present invention has been proposed to solve the above problems, and in the data broadcasting service, in particular, the BIFS service and the service transmitted in the MOT mode, each of the objects in the content can be individually limited reception of the data broadcasting service content, It is an object of the present invention to provide a method for processing a conditional reception for each object, and a system for receiving a DMB conditional reception for object reception of a BIFS service and a MOT service using the same.

That is, according to the present invention, each object in the content using object editing information and mapping information (information representing the correspondence between the object and the object editing information) in the data broadcasting service, particularly the BIFS service and the service transmitted in the MOT mode The purpose of the present invention is to provide a method for processing the conditional reception of the contents of the data broadcasting service content, which enables the individual reception of the DMB, and the DMB conditional access processing system for the object-based reception of the BIFS service and the MOT service using the same. .

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

In order to achieve the above object, the present invention provides a method for processing a conditional reception of data broadcasting service content by object, wherein content required for a predetermined data broadcasting service is authored in a separate file for each object, and an object for each of the created objects. A content authoring step of setting the editing information; An encoding step of performing encoding according to a corresponding data broadcasting service standard while mapping the edited object file to the edited object file for each authored object file; And a conditional access processing step of performing a conditional reception process for each object on the encoded object using the object mapping information set in the encoding step.

On the other hand, the present invention, in the DMB conditional access processing system for the object-specific reception of the BIFS service, authoring the content required for the BIFS service in the form of files for each object and setting the object editing information for each of the authored object Content authoring means for; DMB AV encoding means for encoding the DMB audio / video source according to the DMB standard; BIFS encoding means for generating object identification information for each object with respect to the authored object file, and encoding the object file according to the BIFS service standard while mapping the generated object identification information to the object edit information; BIFS encoding management means for controlling the BIFS encoding means by using the object editing information and delivering object mapping information set by the BIFS encoding means to CAs; output from the DMB AV encoding means and the BIFS encoding means. TS multiplexing means for multiplexing the transport stream TS; And the conditional access processing means for scrambling the stream output from the TS multiplexing means for each object using the object mapping information according to a user's request.

On the other hand, the present invention, in the DMB conditional access processing system for the object-specific reception of the MOT service, authoring the content required for the MOT service in the form of files for each object and setting the object editing information for each of the authored object Content authoring means for; MOT encoding means for encoding the authored object file according to the MOT service standard while mapping the edited object file to the object edit information; MOT encoding management means for controlling the MOT encoding means by using the object editing information, and for transmitting the object mapping information set in the MOT encoding means to the conditional access processing means; And the conditional access processing means for scrambling the object stream output from the MOT encoding means for each object using the object mapping information according to a user's request.

In the present invention, in the DMB conditional access method, in particular, in the DMB conditional access method, it is possible to set up conditional reception for each object of BIFS service and services transmitted to the MOT.

That is, the present invention can individually scramble for each object by using the editing information and the mapping information for the object in the encoding process and the ensemble multiplexing related to CAs for the object authored for the terrestrial DMB service. Make sure

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

First, the method for processing the conditional reception of the object according to the present invention, which can be applied to a general data broadcasting service, includes (1) a content authoring process, (2) an encoding process, and (3) a conditional reception process for each object. . First, the 'content authoring process' is a process of authoring content required for a predetermined data broadcasting service in a separate file for each object and setting object editing information for each of the authored objects. Second, the 'encoding process' Encoding is performed according to the data broadcasting service standard while mapping to the object edit information for each authored object file. Third, the "restriction reception process for each object" is encoded using the object mapping information set in the encoding step. This is the process of performing conditional reception for each object.

(1) Terrestrial DMB CA system for object-based scrambling of BIFS service, and (2) object-based scrambling of MOT service Implementing a terrestrial DMB CA system, as shown in FIGS. 1 and 2, will be described below.

1 is a diagram illustrating an embodiment of a terrestrial DMB CA system for object-based scrambling of a BIFS service according to the present invention.

Terrestrial DMB CA system according to the present invention, as shown in Figure 1, BIFS service content authoring tool (authoring unit) 11, BIFS encoder management and GUI input unit 12, BIFS encoder 13, DMB An encoder 14, an MPEG-1 stream multiplexer 15, a conditional access processor 16, and a conditional access system (CAS) 17 are included. Each component will be described below.

'Content authoring tool for BIFS service (author)' (11) authors the contents required for BIFS service in separate files for each object so that operators can scramble according to the desired content composition, and for each authored object Editing information for each object (editing information for each object arbitrarily set by the user) is set and transmitted to the BIFS encoder management and GUI input unit 12.

The BIFS encoder 13 receives objects authored by the content authoring tool 11 for the BIFS service in the form of an MPEG-4 file and the like, based on the object for each object according to the control signal of the BIFS encoder management and the GUI input unit 12. After assigning a stream identifier (ES_ID) and generating a PID (Packet Identifier) in the same way as the given ES_ID, encoding the object file according to the BIFS service specification while mapping the generated PID to object edit information (object name). do. Here, the object mapping information defines a correspondence relationship between the PID and the object editing information.

The BIFS encoder management and GUI input unit 12 receives the editing information (object editing information) for each object arbitrarily set by the user in the content authoring tool 11 for BIFS service, and then inputs the BIFS encoder ( In step 13), the ES_ID and the PID are generated for each object (that is, the BIFS encoder is controlled using the received object edit information). In addition, the BIFS encoder management and GUI input unit 12 transmits the object mapping information (corresponding relationship between the PID and the edit information for each object) set in the encoding process of the BIFS encoder 13 to the system control and GUI input unit 164.

Meanwhile, the DMB AV encoder 14 receives a source for DMB and encodes it according to the DMB standard. The MPEG-2 stream multiplexer 15 then multiplexes the MPEG-2 streams output from the DMB AV encoder 14 and the BIFS encoder 13.

Next, the conditional access processor 16 selectively scrambles the stream related to the object among the streams output from the MPEG-2 stream multiplexer 15 and then multiplexes with the conditional access messages (ECM, EMM). In detail, it includes an MPEG-2 stream analyzer 161, a scrambler 162, an ensemble multiplexer 163, a system control and a GUI input unit 164. Hereinafter, each will be described.

The MPEG-2 stream analyzer 161 analyzes the MPEG-2 stream input through the MPEG-2 stream multiplexer 15 and outputs the scrambler 162 according to the control signal of the system control and GUI input unit 164. .

The system control and GUI input unit 164 controls scrambling by selecting streams (streams related to objects) for each object using 'object mapping information' received from the BIFS encoder management and GUI input unit 12, and also receives a limited reception service. Dragon Ensemble Controls the general operation of the multiplexer. Here, the system control and GUI input unit 164 receives information about a specific object requesting limited reception from the user through the GUI input unit, and controls scrambling for each object based on the information.

The scrambler 162 scrambles the 'input stream' using a control word (CW) provided by the CA 17 in accordance with the system control and the control of the GUI input unit 164. That is, the scrambler 162 scrambles only some objects that the user requests limited reception under the control of the system and the GUI input unit 164.

The ensemble multiplexer 163 is configured to receive each CA coded message (ECM: Entitlement Control Message) and entitlement management message (EMM), which are input through a control signal from the CA 17. Management message), and each stream inputted from the scrambler 162 is multiplexed to form and output a new ensemble.

The conditional access system (CAS) 17 generates a control word (CW) and outputs it to the scrambler 162, and encodes and outputs the messages ECM and EMM related to the conditional reception to the ensemble multiplexer 163.

2 is a diagram illustrating an embodiment of a terrestrial DMB CA system for object-based scrambling of a MOT service according to the present invention.

Terrestrial DMB CA system according to the present invention, as shown in Figure 2, BWS content authoring tool (author) 21, MOT encoder management and GUI input unit 22, MOT encoder 23, CA It includes a processing unit 24, and a conditional access system (CAS) 25, each component will be described as follows.

The BWS content authoring tool (author) 21 freely authors the content required for the MOT service as a separate file for each object and transmits it to the MOT encoder 23, and edits the object for each of the authored objects. The information (editing information for each object set by the user) is set and transmitted to the MOT encoder management and GUI input unit 22.

The MOT encoder 23 receives each object from the BWS content authoring tool 21 in the form of a file, etc., and encodes the MOT type according to the control signal of the MOT encoder management and the GUI input unit 22 (encoded according to the MOT service). do). That is, the MOT encoder 23 maps the received object file to object edit information and encodes the data according to the MOT service standard.

The MOT encoder management and GUI input unit 22 controls the MOT encoder 23 using object editing information (object name) received from the BWS content authoring tool (author) 21, and encodes the MOT encoder 23. The object mapping information (information on the correspondence relationship between the object file information and the object editing information) set in the process is transmitted to the system control and GUI input unit 244. That is, the MOT encoder management and GUI input unit 22 receives the edit information for each object from the BWS content authoring tool 21, and controls the MOT encoder 23 to encode the MOT type according to the edit information for each object. In addition, the system control and GUI input unit 244 informs the object mapping information that defines the correspondence between the file information and the object editing information for each object.

Next, the conditional access processing unit 24 scrambling the MOT encoded object stream output from the MOT encoder 23 for each object according to a user's request using object mapping information, and then multiplexes with the conditional access message. In detail, the input stream analysis unit 241 includes a input stream analyzer 241, a scrambler 242, an ensemble multiplexer 243, a system control and a GUI input unit 244. Each will be described.

The input stream analyzer 241 analyzes the stream input from the MOT encoder 23 and outputs it to the scrambler 242 according to the system control and the control signal of the GUI input unit 244.

The system control and GUI input unit 244 controls scrambling by selecting streams (streams related to objects) for each object by using the MOT encoder management and the object mapping information received from the GUI input unit 22, and also performs an ensemble for CA. Control the general operation of the multiplexer.

The scrambler 242 scrambles the 'input stream' using the control word CW provided by the CA 25 according to the system control and the control of the GUI input unit 244. That is, the scrambler 242 only scrambles a part of the object that the user requests limited reception under the control of the system and the GUI input unit 244.

The ensemble multiplexer 243 multiplexes each conditional coded message (ECM, EMM) input from the conditional access system (CAS) 25 through a control signal, and each stream input from the scrambler 242, Construct and output a new ensemble.

The CA 25 generates and outputs a control word CW to the scrambler 242. The CA 25 encodes the messages ECM and EMM related to CA and outputs them to the ensemble multiplexer 25.

3A and 3B are explanatory diagrams of an example of applying an object-based scrambling and descrambling method according to the present invention.

Each of the objects (Object 1 to Object 10) shown in FIGS. 3A (sending side) and 3B (receiving side) are objects used in a BIFS or BWS (Broadcasting Web Site) service.

If the receiving user does not have the receiving right, each object on the receiving side may or may not be displayed in the scene 'depending on whether it has been scrambled per object'.

For example, if each object is represented as Object 3 (Presenter), Object 4 (Presenter Clothes), Object 5 (Shoes), etc., the user applies scrambling to Object 4 (Presenter Clothes), Object 5 (Shoes). Then, only the object 3 (presenter) except the objects 4 and 5 will be displayed on the receiving side without receiving permission to the objects 4 and 5.

Here, the information on the PID and the file number generated during encoding in each encoder described with reference to FIGS. 1 and 2 indicates' objects 1, 2, 3 ', and' presenter ',' presenter's clothes' and 'shoes' are' Object edit information '. Therefore, the mapping between these two pieces of information (the correspondence between the object and the object editing information) is defined as 'mapping information'. This information enables the scrambling of each object accurately to the user's point of view when multiplexing.

In addition, the object editing information may be used by using a Content Classification Descriptor when using an object content information (OCI) descriptor in the MPEG-4 system for object-based scrambling of the BIFS service. It is also possible to transmit.

Meanwhile, another embodiment of the present invention will be described.

In general, when scrambling is applied to the object 8 (computer) 301 of the transmitting side, the "computer" does not appear on the screen unless the object 8 (computer) is descrambled (311).

Alternatively, if the object 9 (the globe) and the object 10 (the object edited the globe shape) of the sender shown in Fig. 3a are looked at, the same object as the object 10 (the object edited the globe shape) authored in the authoring tool is displayed. Place the object of the same color as the background of the globe '302' at the position of object 9 (the globe) (invisible to the object 10 in the drawing), and then only object 10 (the object whose globe shape has been edited) In the case of scrambled transmission, it can be seen that the hidden object 9 (the globe) 312 does not appear on the reception screen unless the object 10 (the object whose globe shape has been edited) is descrambled on the reception side screen.

As described above, according to the present invention, the object-based scrambling can be performed in various ways according to the method of authoring each object information.

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

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

As described above, the present invention has an effect of allowing limited reception for each object desired by the user in the DMB BIFS service and the MOT service.

Accordingly, by providing various service applications through the limited reception method of the present invention, it is possible to provide a broadcaster with a high value-added paid broadcasting service as part of a business model, while providing a more diverse and useful high quality data service to consumers. There is an effect that can be provided.

Claims (14)

In the method of processing the conditional reception of data broadcasting service contents by object, A content authoring step of authoring content required for a predetermined data broadcasting service in a separate file for each object and setting object editing information for each of the authored objects; An encoding step of performing encoding according to a corresponding data broadcasting service standard while mapping the edited object file to the edited object file for each authored object file; And Conditional reception processing step of performing a conditional reception process for each object on the encoded object using the object mapping information set in the encoding step. Restricted reception processing method for each object of the data broadcasting service content comprising a. The method of claim 1, The encoding step, When the data broadcasting service is a BIFS (Binary Format for Scene) service, a PID (Packet Identifier) is generated for each object of the authored object file, and the corresponding PID is mapped to the object edit information while mapping the generated PID to the object edit information. And receiving according to the object of the data broadcasting service content, characterized in that the encoding according to the BIFS service standard. The method of claim 2, The object mapping information, And a method for receiving limited reception for each object of the data broadcasting service content, wherein the PID and the object edit information indicate a corresponding relationship. The method of claim 1, The encoding step, When the data broadcasting service is a multimedia object transfer (MOT) service, the limited reception process for each object of the data broadcasting service contents is encoded according to the MOT service standard while mapping the authored object file to the object edit information. Way. The method of claim 4, wherein The object mapping information, The method of claim 1, wherein the object broadcasting information of the object broadcasting information corresponds to the information of the object file. The method according to any one of claims 1 to 5, The limited reception process step, The method of claim 1, wherein the scrambling is performed on only some of the encoded objects for which the user has requested CA. In the DMB CA system for CA BSS, Content authoring means for authoring content required for a BIFS service in a file format for each object and for setting object editing information for each authored object; DMB AV encoding means for encoding the DMB audio / video source according to the DMB standard; BIFS encoding means for generating object identification information for each object with respect to the authored object file, and encoding the object file according to the BIFS service standard while mapping the generated object identification information to the object edit information; BIFS encoding management means for controlling the BIFS encoding means by using the object editing information and delivering the object mapping information set in the BIFS encoding means to the conditional access processing means; TS multiplexing means for multiplexing the transport stream (TS) output from said DMB AV encoding means and said BIFS encoding means; And The conditional reception processing means for scrambling the stream output from the TS multiplexing means for each object using the object mapping information according to a user's request DMB CA system for conditional reception of objects in the BIFS service, including. The method of claim 7, wherein The object identification information, DMB conditional access processing system for object-based conditional reception of a BIFS service, characterized in that the PID (Packet Identifier). The method of claim 8, The BIFS encoding means, And a base stream identifier (ES_ID) for each object of the authored object file, and generates a PID in the same manner as the ES_ID. The method of claim 7, wherein The limited reception processing means, Transport stream analyzing means for analyzing a transport stream output from the TS multiplexing means; System control / input means for controlling the scrambling means to be scrambled only for some objects requested by the user by using the object mapping information received from the BIFS encoding management means; And The scrambling means for scrambling the transport stream output from the transport stream analyzing means for each object according to the control of the system control / input means; DMB CA system for conditional reception of objects in the BIFS service, including. The method of claim 10, Ensemble multiplexing means for generating a DMB ensemble by multiplexing the stream output from the scrambling means and the conditional access message DMB limited reception processing system for the object-specific reception of the BIFS service further comprising. In the DMB CA system for conditional reception for each object of a multimedia object transfer (MOT) service, Content authoring means for authoring content required for a MOT service in a file format for each object and setting object editing information for each authored object; MOT encoding means for encoding the authored object file according to the MOT service standard while mapping the edited object file to the object edit information; MOT encoding management means for controlling the MOT encoding means by using the object editing information, and for transmitting the object mapping information set in the MOT encoding means to the conditional access processing means; And The conditional reception processing means for scrambling the object stream output from the MOT encoding means for each object using the object mapping information according to a user's request DMB conditional access processing system for the object-based limited reception of the MOT service including. The method of claim 12, The limited reception processing means, Input stream analyzing means for analyzing a transport stream output from the MOT encoding means; System control / input means for controlling the scrambling means to be scrambled only for some objects requested by the user by using the object mapping information received from the MOT encoding management means; And The scrambling means for scrambling the transport stream output from the input stream analyzing means for each object according to the control of the system control / input means; DMB conditional access processing system for the object-based limited reception of the MOT service including. The method of claim 13, Ensemble multiplexing means for generating a DMB ensemble by multiplexing the stream and the conditionally received message output from the scrambling means DMB conditional access processing system for the object-based limited reception of the MOT service further comprising.

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