KR101171312B1 - Method for transmitting and receiving broadcasting signal - Google Patents

Abstract

The present invention relates to a method for transmitting and receiving broadcast signals. The present invention includes the steps of receiving a broadcast signal including the authority information for controlling the authority for the broadcast content of the application; Decoding the received broadcast signal to obtain authority information; And expressing a control function for the received broadcast content according to the obtained authority information. According to the present invention, it is possible to control whether a broadcast receiving device accesses a broadcast content received through a broadcast transmission signal.

Broadcast, authority, channel, FIC, FIG

Description

Method for transmitting and receiving broadcasting signal

1 is a conceptual diagram illustrating a process of receiving an application by a broadcast receiving device;

2 is a hierarchical diagram illustrating a concept of allowing a broadcast signal transmission / reception method to store broadcast content through an application;

3 is a diagram illustrating an example of a descriptor for parsing authorization information that can be transmitted and received according to an embodiment of a broadcast signal transmission and reception method according to the present invention.

4 (a) and 4 (b) are views showing the positions of the authority information transmitted and received by the broadcast signal transmission and reception method according to the present invention, respectively.

5 is a block diagram showing an embodiment of a broadcast signal transmission method according to the present invention.

6 is a block diagram showing an embodiment of a broadcast signal receiving method according to the present invention.

The present invention relates to a broadcast signal transmission and reception method, and more particularly, to provide a broadcast signal transmission and reception method which can be controlled to protect digital broadcast contents.

The digital broadcasting system may transmit various multimedia services in addition to broadcast contents. In addition, as shown in the examples of terrestrial digital multimedia broadcasting (DMB) or satellite DMB, digital broadcasting is a basis for providing convenience of mobile reception.

Digital multimedia broadcasting based on DAB (Digital Audio Broadcasting) is defined to enable various data broadcasting services. In particular, the terrestrial DMB broadcasting is aimed at a free service unlike the satellite DMB broadcasting so that anyone who owns the receiving terminal can easily receive the broadcasting.

 In addition to the broadcast transmission terminal, a user may use a terrestrial DMB service using a mobile phone, a portable multimedia player (PMP), a personal digital assistant (PDA), or the like.

When the broadcast service is provided, the receiving terminal may receive an application related to the broadcast service, and store or play the broadcast content received through the application.

In the case of a broadcast service that aims for a free service, such as a terrestrial DMB service, a receiving terminal can easily record a received broadcast service and play it at a time desired by a user.

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

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 a broadcast signal transmission / reception method capable of controlling access to broadcast content received by a broadcast reception terminal through a broadcast signal.

In order to achieve the above object, the present invention comprises the steps of generating the right information that the application can control the broadcast content; Forming a broadcast data format for multiplexing a synchronization channel, fast channel information including the generated authority information, and broadcast raw data; And transmitting the broadcast data formed in the forming step.

The authority information may be set in a fast information channel (FIC).

The fast information channel (FIC) includes a service identifier to which the application is transmitted, an ensemble identifier to which the broadcast content is transmitted, a service identifier to which the broadcast content is transmitted, and authority information for the application to control the broadcast content. It may include.

The authority information includes reservation recording authority information of the broadcast content, metadata authority information stored by the application, authority related to storage of the broadcast content, authority related to reproduction of the broadcast content, and authority related to deletion of the broadcast content. It may include at least one of the information.

In another aspect, the present invention includes the steps of receiving a broadcast signal including the right information for controlling the right to the broadcast content of the application; Decoding the received broadcast signal to obtain authority information; And expressing a control function for the received broadcast content according to the obtained authority information.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention that can specifically realize the above object will be described with reference to the accompanying drawings.

When the broadcast transmitting end transmits the broadcast content, the broadcast receiving device may reproduce the broadcast content through an application in which the broadcast receiving device can drive the content. 1 is a conceptual diagram illustrating a process in which a broadcast receiving device receives an application.

An embodiment of a broadcast signal receiving method according to the present invention will be described with reference to FIG. 1.

The broadcast reception device may receive an application from a broadcast transmission end or a signal transmission end of a communication network. The broadcast reception device may have a separate application.

The broadcast reception device may express broadcast content from a broadcast transmission end received through an application, and store or reproduce broadcast content through the application.

2 is a hierarchical diagram illustrating a concept of allowing a broadcast signal transmission / reception method to store broadcast content through an application. An embodiment of a broadcast signal transmission and reception method will be described with reference to FIG. 2.

When the broadcast receiving device receives the broadcast content together with the application, the broadcast receiving device processes the broadcast content received through the internal functional blocks (layer c).

The tuner of the broadcast reception device may receive broadcast content through the selected channel, and the broadcast decoder may decode the received broadcast content (layer c).

The decoded broadcast content may be expressed to the user through the application interface (layer a).

The user may transmit a control command for playing or recording the decoded broadcast content through an application interface (layer a and b).

At this time, an application platform such as an application manager, an electronic program guide (EPG), a channel navigator, or the like receives a user control command such as playing or recording broadcast content from the user through an application interface, and broadcast content according to the control command. Run the application sent with.

Hereinafter, for convenience, a hardware and software platform for receiving a user control command through an application interface and allowing an application to execute the user control command is referred to as middleware.

In the broadcast signal transmission method according to the present invention, the broadcast signal may include permission information for authorizing an application to perform storage, reproduction, and the like, in the broadcast signal. Then, the broadcast reception device may receive the authority information and display the authority information through an interface of an application driven by the middleware.

FIG. 3 is a diagram illustrating an example of a descriptor for parsing right information that is included and transmitted by a method of transmitting and receiving broadcast signals according to the present invention. An embodiment of a broadcast signal transmission and reception method according to the present invention will be described with reference to FIG. 3.

The application right information transmitted and received by the broadcast signal transmission / reception method according to the present invention includes basic information on authority, information defining reserved recording rights of broadcast content, metadata information of broadcast content, information defining rights related to content storage, content The information may include at least one of information defining a reproduction related right, information defining a content deleting related right, information defining a right about a trick mode for playing a content, and information defining a time shift right.

The order, authority value, position, and meaning of the authority information shown in the example of FIG. 3 may be easily changed by those skilled in the art.

First, the basic information about the authority information transmitted by the embodiment of the present invention will be described.

1) Basic Information

The descriptor_tag represents a synchronization byte (0x7B) of the current descriptor.

descriptor_length represents length information of the current descriptor.

this_broadcaster_id represents a broadcast ensemble ID (32 bit) and a service ID (32 bit).

other_broadcaster_id represents an identifier (32bit) and a broadcast service identifier (32bit) of an ensemble different from the currently displayed ensemble.

2) Scheduled recording permission

scheduled_application_initiated_recording represents scheduled recording information.

read_application_initiated_recording represents information for viewing a previously recorded reservation recording.

modify_application_initiated_recording is information that can previously modify a scheduled recording.

delete_application_initiated_recording is information for deleting a reserved recording previously.

3) Metadata related permission information

read_metadata is information indicating that metadata stored by an application can be viewed.

4) Save related permission information

read_user_initiated_recordings is information indicating that a user can refer to the information of the content from the stored content list.

read_application_initiated_recordings is information indicating that an application can refer to stored content information in a stored content list.

user_initiated_record_now Information indicating that the content can be immediately stored by the user.

application_initiated_record_now is information indicating that content can be immediately stored by an application.

5) Play Information

play_user_initiated is information indicating that a user can play stored content.

play_application_initiated is information indicating that stored content can be played by an application.

preview_user_initiated is information indicating that a user can use a stored content preview function.

preview_application_initiated is information indicating that the application can preview the stored content.

6) Delete permission information

delete_user_initiated_recordings is information indicating that a user can delete stored content.

delete_application_initiated_recordings is information indicating that stored content can be deleted by an application.

In addition, when the application plays the content, the authority information of the application may be set and transmitted in the broadcast signal so that the application may have a trick play or time shift function.

Here, the application may be driven in association with the application interface in the execution environment defined by the middleware. Therefore, other applications may receive a user's control command through a similar application interface according to the execution environment defined in the middleware.

4 (a) and 4 (b) are diagrams showing positions on broadcast signals and positions of respective authority information when the above-described authority information is transmitted and received by the broadcast signal transmission / reception method according to the present invention. Referring to Figures 4 (a) and 4 (b) will be described in the broadcast signal transmission and reception method according to the present invention.

In DAB-based digital broadcasting, one ensemble includes one or more services, and a service includes one or more service components.

The Eureka-147 scheme repeatedly transmits a unit structure called a frame. The transmission frame may include a synchronization channel, a fast information channel (FIC), and a main service channel (MSC).

The FIC has fast channel information (hereinafter, used in the same sense) to quickly recognize the structure of data transmitted to the MSC's Common Interleaved Frame (CIF), and each CIF includes video data and audio data. Raw data may be included.

The FIC may include a plurality of fast information blocks (FIBs), and the FIB may include a plurality of fast information groups (FIGs). FIG means a transport channel information package used for one application in the FIC.

In the broadcast signal transmission / reception method according to the present invention, in order to transmit the above authority information, the authority information for the application may be included and transmitted in FIG (Fast Information Group).

FIG includes a FIG header and a FIG data field. The FIG header has FIG type and length information. Therefore, the embodiment of FIG. 4 illustrates the case in which extension 15 of FIG type 0 is added to transmit the authority information, but the authority information is not necessarily transmitted to the extension 15 of FIG type 0.

The FIG data field is a C / N field indicating the current configuration, the next array, an OE field indicating whether the information is related to the current ensemble, whether the service identifiers (SIds) are 16 bits or 32 bits. Contains the P / D fields to define.

The FIG data field for transmitting the authority information may include an extension field 01111 indicating an extension 15 and a type 0 field.

If the extension field is 01111, the type 0 field may include authorization information of an application that may be transmitted by one or more services. Alternatively, authorization information of an application that may be transmitted by the service component may be inserted.

Application authority information according to each service may include the authority information described above with reference to FIG. 3.

The application authority information according to the service includes a first field indicating service identifier information, a second field indicating an identifier of an ensemble in which a service that can be controlled by the application's authority information is included, and a third service identifier included in the ensemble. Field, and a fourth field (hereinafter, referred to as an authorization information field) indicating authorization information for an application.

The authority information described with reference to FIG. 2 is included in the authority information field which is the fourth field of the type 0 field of the FIG data field.

The authority information field may transmit authority information by assigning one bit, and the example of FIG. 4 (b) shows that the authority information shown in FIG. 2 can be set to one bit.

When the authorization information is transmitted in service units, the authorization information may be set for all programs in the service. However, as described above, the authority information of the application may be transmitted according to the service component as well as each service unit.

Assuming that authorization information is provided for each service as shown in FIG. 4 (a), the identifier of a service to which an application is transmitted may be set to 16 bits or 32 bits.

The ensemble identifier is transmitted in the second field and the service identifier in the ensemble in the third field to determine the service through which the broadcast content that can restrict the authority of the application included in the service is transmitted.

The authority information of the application is set in the fourth field and transmitted.

Accordingly, the application transmitted through the service of the first field may play, record, and delete broadcast content transmitted through the service of the third field in the ensemble of the second field with the authority transmitted in the authority information field.

As described above, the information about the service component may be transmitted in the first and third fields.

5 and 6 are flowcharts each showing an embodiment of a broadcast signal transmission and reception method according to the present invention. First, an embodiment of a broadcast signal transmission and reception method according to the present invention will be described with reference to FIG. 5.

The application may include the authority information for controlling the broadcast content in the quick channel information of the broadcast signal (S10). In this case, the application is preferably received together with the broadcast content to execute the broadcast content.

The broadcast data format may be formed by multiplexing a synchronization channel, the generated fast channel information and broadcast raw data (S20), and transmit the broadcast data (S30).

An embodiment of a broadcast signal transmission and reception method according to the present invention will be described with reference to FIG. 6.

The application and the broadcast signal including the authority information on whether the application can control the broadcast content in the fast channel information are received (S50). Authorization information may be obtained by decoding the received broadcast signal (S60). The application may express a control function of the received broadcast content to the outside according to the obtained authority information (S70).

In this way, if the authorization information is provided for each service or service component, an application implemented in the middleware can access the broadcast content according to the authorization information of the service or service component, and thus, broadcast content cannot be reproduced or recorded without permission.

It is easy for a person skilled in the art to change or modify the present invention from the present specification. Although an embodiment of the present invention has been described above clearly, various modifications thereof should be made without departing from the spirit and the scope of the present invention.

The effects of the broadcast signal transmission and reception method according to the present invention described above are as follows. According to the broadcast signal transmission and reception method according to the present invention, it is possible to control whether a broadcast reception device accesses broadcast content received through a broadcast transmission signal.

Claims (8)

Generating rights information on broadcast content and whether an application related to execution of the broadcast content can control the broadcast content; Forming a broadcast data format for multiplexing a synchronization channel, fast channel information including the generated authority information, and broadcast raw data; And And transmitting the broadcast data formed in the forming step. The method of claim 1, The authority information is set in a fast information channel (FIC). 3. The method of claim 2, The fast information channel (FIC) is a service identifier to which the application is transmitted, an ensemble identifier to which the broadcast content is transmitted, a service identifier to which the broadcast content is transmitted, and authority information for the application to control the broadcast content. Broadcast signal transmission method comprising at least one of. The method of claim 1, The authority information may include reservation recording authority information of the broadcast content, metadata authority information stored by the application, authority related to storage of the broadcast content, authority related to reproduction of the broadcast content, and authority related to deletion of the broadcast content. Broadcast signal transmission method comprising at least one information. Receiving a broadcast signal including broadcast information and authority information on whether an application related to executing the broadcast content can control the broadcast content; Decoding the received broadcast signal to obtain authority information; And And displaying a control function for the received broadcast content according to the obtained authority information. 6. The method of claim 5, The authority information is set in a fast information channel (FIC). The method according to claim 6, The fast information channel (FIC) includes a service identifier to which the application is transmitted, an ensemble identifier to which the broadcast content is transmitted, a service identifier to which the broadcast content is transmitted, and a right for the application to control the broadcast content. Broadcast signal receiving method comprising at least one of the information 6. The method of claim 5, The authority information may include reservation recording authority information of the broadcast content, metadata authority information stored by the application, authority related to storage of the broadcast content, authority related to reproduction of the broadcast content, and authority related to deletion of the broadcast content. Broadcast signal reception method comprising at least one information.

Images