KR100979445B1 - Method for providing three dimensional data service based on dmb and method for receiving it - Google Patents

Abstract

The present invention relates to a digital broadcasting based 3D data service providing method and a method of receiving the same. The digital broadcasting based 3D data service providing method according to the present invention is directed to a specific data content targeted for 3D data service. Generating data and additional data; Generating signaling information including dimension identification information indicating a dimension of the specific data content and channel identification information indicating channel information separately allocated to the main data and the additional data; And generating a broadcast stream including the main data and the additional data to which the separate channel is allocated, and the signaling information, and receiving the digital broadcasting based 3D data service according to the present invention. The method can provide a 3D data service in a more efficient and simple manner while maintaining backward compatibility with digital broadcasting that provides a conventional 2D data service.

DMB, 3D data service, main data, additional data

Description

DMB-based 3D data service providing method and receiving method {METHOD FOR PROVIDING THREE DIMENSIONAL DATA SERVICE BASED ON DMB AND METHOD FOR RECEIVING IT}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to digital multimedia broadcasting (DMB) technology, and more particularly, to a method for providing a 3D data service based on DMB and a method for receiving a 3D data service based on DMB. The present invention is derived from the research conducted as part of the IT source technology development project of the Ministry of Knowledge Economy. [Task unique number: 2008-F-011-01, Task name: Development of next generation DTV core technology-Development of personal glasses-free 3D broadcasting technology ].

In DMB, a data service is generally provided to a DMB terminal by the following process. That is, when the transmitting side transmits various data contents such as images and texts in the form of a carousel, the DMB terminal which wants to receive the data service is downloaded and interpreted by the application decoder and reproduced for viewing by the user. . In this case, it is called a 3D data service that allows a 3D data to be reproduced in a reproduced image or text.

Meanwhile, the three-dimensional data content, for example, the three-dimensional stereoscopic image is composed of a main image and various three-dimensional additional images, and the two images are converted into left and right images, respectively, and then reproduced on a three-dimensional display to make a stereoscopic feeling. Here, the 3D additional image may be a half of vertical (horizontal) right image, a full right image, a depth image, or the like. As an example, when the 3D additional image is a vertical 1/2 right image, the main image and the 3D additional image are converted into an image having only odd line image data and even line image data, respectively. In addition, the left and right field images are simultaneously played on the 3D display at the same position in the scene.

Therefore, in order to provide the 3D data service, it is necessary to be able to transmit and receive additional data (hereinafter, additional data) for the 3D service together with general data (hereinafter, the main data) for the 2D service.

In the transmission and reception of such main data and additional data, the conventional DMB-based data service focused on two-dimensional services, and thus, three-dimensional data services developed to be compatible with the main data and additional data are separately encoded and transmitted. In addition, the receiving side requires a separate application decoder to separately decode two types of data transmitted separately.

However, the transmission / reception scheme for separately processing the main data and the additional data has a problem of requiring supplementation of digital video standards or development of a more complicated system. In particular, power consumption, terminal hardware / software resources such as mobile multimedia broadcasting environment are required. There is a problem that is not suitable for the environment that is constrained to use.

The present invention has been proposed to solve the above problems of the prior art, DMB-based to provide a three-dimensional data service in a more efficient and simple way while maintaining backward compatibility with the existing DMB providing a two-dimensional data service An object of the present invention is to provide a 3D data service providing method and a receiving method thereof.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

The present invention relates to a method for providing a digital broadcast-based three-dimensional data service, comprising: a main data for a specific data content that is a target of a three-dimensional data service, a header of the main data and additional data, and a header of the main data. Generating a header of said additional data comprising a trigger time delayed by a decoding time rather than a defined trigger time and an expiration time equal to an expiration time defined in a header of said main data; Generating signaling information including dimension identification information indicating a dimension of the specific data content and channel identification information indicating channel information separately allocated to the main data and the additional data; Generating a broadcast stream including the main data, the header of the main data, the additional data and the header of the additional data, and the signaling information to which the separate channel is allocated.

In addition, the present invention, in the method for receiving a digital broadcast-based three-dimensional data service, the main data and additional data for the specific data content that is the target of the three-dimensional data service, the header and the main data of the main data A header of the additional data comprising a trigger time delayed by a decoding time rather than a trigger time defined in a header of the header and an expiration time equal to an expiration time defined in a header of the main data, and dimension identification information indicating a dimension of the specific data content. And receiving broadcast information including signaling information having channel identification information indicating information of a channel allocated to the main data and the additional data. Separating the main data and the additional data using the signaling information; Decoding the separated main data and the separated additional data based on the header of the main data and the header of the additional data; And reproducing the decoded main data and the decoded additional data.

The above-described method and method for providing a 3D data service based on digital broadcasting of the present invention provide a 3D data service in a more efficient and simple manner while maintaining backward compatibility with digital broadcasting that provides a conventional 2D data service. Can provide.

The above objects, features, and advantages will become more apparent from the following detailed description with reference to the accompanying drawings, and accordingly, those skilled in the art to which the present invention pertains may have the technical idea of the present invention. It will be easy to implement. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a transmission apparatus for providing a digital broadcast based 3D data service according to an embodiment of the present invention.

As shown in FIG. 1, the transmission apparatus 100 according to an embodiment of the present invention includes a data generator 110, a signaling information encoder 120, a main data encoder 130, an additional data encoder 140, and The broadcast stream generator 150 is included.

Here, the data generating unit 110 generates the main data and the supplementary data for the specific data content that is the target of the 3D data service.

The main data encoder 130 encodes the main data generated by the data generator 110 according to a predetermined encoding format.

The additional data encoder 140 encodes the additional data generated by the data generator 110 according to a predetermined encoding format.

The broadcast stream generator 150 separates a separate channel (hereinafter, referred to as a main data channel and an additional data channel) from the main data encoded by the main data encoder 130 and the additional data encoded by the additional data encoder 140. The broadcast stream is generated by assigning and multiplexing them.

The signaling information encoder 120 may include information indicating that the specific data content is three-dimensional data, that is, information indicating that the specific data content includes main data and additional data (hereinafter, referred to as dimension information), and the main data. Signaling information is inserted into the broadcast stream by encoding signaling information including information (hereinafter, channel identification information) indicating which data channel is allocated to data and the additional data to the broadcast stream generation unit 150. To be.

The resultant broadcast stream includes main data and additional data for the 3D data service, and signaling information including the dimension identification information and the channel identification information.

As such, by including signaling information in the broadcast stream and indicating that the data content is capable of 3D data service, the main data and the additional data are transmitted through different channels, so that the receiving terminal may transmit both the main data and the additional data through one broadcast stream. It is possible to identify the dimension of the specific data content received and whether it is main data or additional data for the specific data content (signaling information will be described in more detail with reference to FIG. 3 below).

Meanwhile, in order to three-dimensionally reproduce the specific data content in the receiving terminal, information indicating the relationship between the main data and the additional data for the specific data content is required together with the signaling information. In the present invention, the relationship between the main data and the additional data corresponding to each other is shown by using information included in the header of the main data and the header of the additional data, which will be described in more detail with reference to FIG. 2 below.

FIG. 2 is a diagram illustrating a relationship between main data and additional data corresponding to each other in order to provide a digital broadcast based 3D data service according to an embodiment of the present invention. In particular, (a) of FIG. (B) is a diagram for comparing a series of times when main data and additional data are transmitted to a receiving side and reproduction is completed.

As shown in Fig. 2A, the main data and additional data are each composed of a data file object consisting of a data header and a data body.

The header of the main data includes a content name, a trigger time (Tr1) indicating when the main data starts to be played on the receiving terminal, an expiration time (Te1) indicating when the reproduction of the main data expires, and the like. The information is included and the body of the main data contains the actual main data file. In addition, in the header of the additional data, information indicating whether the additional data is for the left image or the right image, together with the content name, the trigger time Tr2 of the additional data, and the expiration time Te2 of the additional data, L / R indication) and the like, and a substantial additional data file is included in the body of the additional data.

Here, the content name of the data header is used to indicate that the main data and the additional data correspond to each other, that is, a pair for specific data content that is the object of the 3D data service. For example, the main data and the supplementary data may be set in such a manner that the content name of the supplementary data header is the same as the content name of the corresponding main data header or has a specific content name indicating that the supplementary data is the supplementary data of the corresponding main data. This may indicate a mutually corresponding relationship.

By indicating that the main data and the additional data correspond to each other as described above, the receiving terminal can simultaneously play the main data and the additional data to receive a three-dimensional data service.

In addition, the trigger time and the expiration time of the data header are used to enable the main terminal and the additional data to use one application decoder at the receiving terminal. This will be described in more detail with reference to FIG. 2B as follows.

As shown in FIG. 2B, the decoding time Td of the main data is compared to the trigger time Tr2 of the additional data included in the additional data header compared to the trigger time Tr1 of the main data included in the main data header. Set to a value delayed by). Here, the decoding time Td of the main data means a time when it is expected that the main data will be decoded in the application decoder of the receiving terminal.

As described above, if the trigger time Tr2 of the additional data is delayed by the decoding time Td of the main data, the additional data will be sequentially decoded after the decoding of the main data is completed. The decoding is advantageous in that a separate application decoder for each of the main data and the additional data is not required as in the prior art.

However, in this case, since only the main data is reproduced during the time (부가 Td) when the additional data is decoded after the completion of the decoding of the main data, the data may be seen in two dimensions. It is expected to be no problem since it is very short compared with the time.

Even in this case, the expiration time Te2 of the additional data included in the additional data header is set to the same value as the expiration time Te1 of the main data included in the main data header. This is because when the expiration time is not the same, it may overlap with the reproduction of the main data and / or additional data of other data contents, resulting in an unnatural stereoscopic effect.

3 is a diagram for describing signaling information for providing a DMB-based three-dimensional data service according to an embodiment of the present invention. In particular, this figure describes how to define signaling information in terrestrial DMB as an example.

In general, terrestrial DMB transmits user application information through FIG. 13 (hereinafter FIG. 0/13) in FIG. 0 (Fast Information Group) format 0 so that application services can be exactly matched to a corresponding decoder. do. In this case, the type of application service is defined by a user application type. In the present invention, as an example, information indicating that the specific data content transmitted in the terrestrial DMB method using the user application information is three-dimensional data (see the dimension identification information in FIG. 1) and the three-dimensional specific data content Channel information (channel identification information of FIG. 1) of data and additional data will be defined.

More specifically, as shown in FIG. 3, FIG 0/13 includes user application information for defining an existing two-dimensional data service (see User Application Information k) and user application information for defining a three-dimensional data service. (See User Application Information) is defined. Here, the user application information for defining the existing two-dimensional data service indicates the application service type (ie, two-dimensional data service) of the data transmitted through the main data channel through the user application type, and defines the three-dimensional data service. User application information for this purpose also indicates an application service type (ie, 3D data service) of data transmitted through an additional data channel through a user application type.

As described above, when a pair of user application information is defined in FIG 0/13, whether the pair of user application information correspond to each other for providing one 3D data service (that is, providing 3D data content). In addition, information is required, which also relates to which of the primary data channels and which of the additional data channels. Therefore, SId (Service Identifier) and SCIdS (Service Component Identifier within the Servic) of user application information are defined as follows.

First, the SIds of a pair of user application information coincide with each other to indicate that a pair of user application information corresponds to each other.

In addition, the primary data channel and the additional data channel are identified through extension 2 (hereinafter, FIG 0/2) in FIG type 0 of the SCId linked to the SCIdS. That is, the SCId of the user application information for defining the existing secondary data service indicates the primary data channel and simultaneously sets the P / S (Primary / Secondary) to 1 and the user for defining the 3D data service. The SCId of the application information indicates the additional data channel and simultaneously sets the P / S to zero.

As such, when signaling information is defined in the terrestrial DMB, the terrestrial DMB terminal capable of receiving only the existing two-dimensional data service can interpret only the user application information for defining the existing two-dimensional data service. You will receive a two-dimensional data service. On the other hand, terrestrial DMB terminals capable of receiving 3D data services additionally analyze not only user application information for defining 2D data services but also user application information for defining 3D data services to access and transmit additional data channels. It can be determined that the data to be additional data.

4 is a diagram illustrating a receiving apparatus for receiving a digital broadcast based 3D data service according to an embodiment of the present invention.

As shown in FIG. 4, the reception apparatus 400 according to an exemplary embodiment of the present invention includes a broadcast stream receiver 410, a main data decoder 420, an additional data decoder 430, and a main data storage 440. And an additional data storage unit 450, a 3D data service control unit 460, an application decoder 470, and a 3D data reproduction unit 480.

Here, the broadcast stream receiving unit 410 receives a broadcast stream including main data and additional data for the 3D data service and signaling information including the dimension identification information and the channel identification information described above with reference to FIGS. 1 and 3. The main data and the additional data are separated using the signaling information.

The main data and the additional data separated by the broadcast stream receiving unit 410 are output to the main data decoder 420 and the additional data decoder 430, respectively, and the signaling information is output to the 3D data service control unit 460.

The main data decoder 420 decodes the input main data and stores the main data file in the main data storage 440.

The additional data decoder 430 stores the additional data file by decoding the input additional data only when the 3D data service controller 460 operates the additional data decoder 430 using the input signaling information. It is stored in the unit 450. If the signaling information (especially dimensional identification information) input to the 3D data service controller 460 indicates that a 2D data service is provided (that is, indicates that the received data content is 2D), then the 3D data service The controller 460 does not operate the additional data decoder 430.

When the additional data decoder 430 decodes the additional data by the above control, the 3D data service controller 460 determines the information included in the header of the additional data, that is, the content name, the additional data trigger time, and the additional data expiration time. Will output

After receiving the header information of the additional data, the 3D data service controller 460 receives the pre-stored main data file when a predetermined time set by the transmitter arrives or when user request information requesting data reproduction is received. The additional data file is output to the application decoder 470.

When the application decoder 470 decodes the received main data file and the additional data file and outputs them to the 3D data reproducing unit 480, the 3D data reproducing unit 480 reproduces them simultaneously, thereby adding a three-dimensional effect to the reproduced data. Make me feel.

In this case, when using one application decoder 470 as in the embodiment of the present invention, since the main data file and the additional data file must be shared, the additional data file must be decoded after the main data file is decoded. . To this end, setting the trigger time of the additional data included in the additional data header to a value delayed by the decoding time of the main data rather than the trigger time of the main data has been described above with reference to FIG. The operation of the application decoder 470 is controlled by using a trigger time among header information of the additional data.

That is, the 3D data service control unit 460 first receives the main data storage unit 440 and the application decoder 470 when a predetermined time set by the transmitting side arrives or when user request information requesting data reproduction is received. Connect to output the main data file stored in the main data storage unit 440 to the application decoder 470. Thereafter, when the decoding of the main data file is completed in the application decoder 470, that is, when the decoding time of the main data elapses and the trigger time of the additional data arrives, the 3D data service controller 460 next stores the additional data. The additional data file stored in the additional data storage unit 450 is output to the application decoder 470 by connecting the unit 450 and the application decoder 470. While the additional data file is decoded by the application decoder 470, the main data file which has already been decoded is reproduced by the 3D data reproducing unit 480, but the decoding time of the additional data file is shorter than the total reproduction time. Not already described in FIG. 2.

In this way, one application decoder can be used by sequentially outputting the main data file and the additional data file to the application decoder 470.

Furthermore, even in such a case, the 3D data service controller 460 causes the main data reproduction and the additional data reproduction in the 3D data reproducing unit 480 to expire at the same time using the expiration time of the header information of the additional data.

With such a receiving device, when the 3D data content is received, the 3D data content can be identified using signaling information, and the main data and the additional data can be separated and secured. At the same time, it is possible to receive a three-dimensional data service that is reproduced to give a sense of three-dimensionality to the data content. On the other hand, when the two-dimensional data content is received by the receiving device, the two-dimensional data service can be received by reproducing only the main data as in the prior art.

As a result, two-dimensional data, three-dimensional data, or data in which two and three dimensions are mixed can be expressed in the data reproduction region of the receiving apparatus (see FIG. 5).

5 is a diagram illustrating a data reproduction screen according to an embodiment of the present invention.

As shown in FIG. 5, the above-described technique of the present invention enables independent transmission and reception of data contents having different dimensions, thereby constructing a data reproduction screen in which two-dimensional data and three-dimensional data are mixed. Can be.

On the other hand, the method of the present invention as described above can be written in a computer program. And the code and code segments constituting the program can be easily inferred by a computer programmer in the art. In addition, the written program is stored in a computer-readable recording medium (information storage medium), and read and executed by a computer to implement the method of the present invention. The recording medium may include any type of computer readable recording medium.

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.

1 is a diagram illustrating a transmission apparatus for providing a digital broadcast based 3D data service according to an embodiment of the present invention.

2 is a diagram illustrating a relationship between main data and additional data corresponding to each other to provide a 3D data service based on digital broadcasting according to an embodiment of the present invention.

3 is a diagram for describing signaling information for providing a DMB-based three-dimensional data service according to an embodiment of the present invention.

4 is a diagram illustrating a receiving apparatus for receiving a digital broadcast based 3D data service according to an embodiment of the present invention.

5 is a diagram illustrating a data reproduction screen according to an embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

100: transmitting apparatus 110: data generating unit

120: signaling information encoder 130: main data encoder

140: additional data encoder 150; Broadcast stream generator

Claims (8)

In the method for providing a digital broadcast-based three-dimensional data service, Defined in the main data and the trigger time delayed by the decoding time than the trigger time defined in the header and the additional data and the header of the main data for the specific data content that is the target of the three-dimensional data service and the header of the main data Generating a header of the additional data including an expiration time equal to the expired expiration time; Generating signaling information including dimension identification information indicating a dimension of the specific data content and channel identification information indicating channel information separately allocated to the main data and the additional data; Generating a broadcast stream including the main data and the header of the main data, the header of the additional data and the additional data, and the signaling information to which the separate channel is allocated; Digital broadcasting based 3D data service providing method comprising a. The method of claim 1, The signaling information generating step, The pair of user application information corresponding to each other have the same service identifier (SId), define the dimension of the specific data content through the user application type, and define the primary data channel and the additional data channel through the service component identifier (SCId). Done in a way that defines 3D data service providing method based on digital broadcasting. delete delete In the method for receiving a digital broadcast-based three-dimensional data service, Main data and additional data for a specific data content targeted for a 3D data service, a trigger time delayed by a decoding time from a trigger time defined in a header of the main data and a header of the main data, and a header of the main data. A header of the additional data including an expiration time equal to a defined expiration time, dimension identification information indicating a dimension of the specific data content, and channel identification information indicating information of a channel allocated to the main data and the additional data; Receiving a broadcast stream including signaling information; Separating the main data and the additional data using the signaling information; Decoding the separated main data and the separated additional data based on the header of the main data and the header of the additional data; And Reproducing the decoded main data and the decoded additional data. Digital broadcast based 3D data service receiving method comprising a. delete The method of claim 5, The reproducing step may simultaneously expire reproduction of the main data and reproduction of the additional data based on expiration time information included in the additional data header. 3D data service receiving method based on digital broadcasting. The method of claim 5, The signaling information, Include a pair of user application information that The user application information may have the same service identifier (SId) and define a dimension of the specific data content through a user application type, and define a primary data channel and an additional data channel through a service component identifier (SCId). 3D data service receiving method based on digital broadcasting.

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