KR100910996B1 - Method of Providing Three-Dimensional Video Service in Digital Multimedia Broadcasting System - Google Patents

Abstract

The present invention relates to a 3D video service providing method in a digital multimedia broadcasting system. In order to provide a 3D video service in a digital multimedia broadcasting, a transmitter inserts a 3D video stream and signaling information thereof into a user application type. The receiving side analyzes the 3D video stream obtained from the broadcast stream and signaling information thereof, and decodes the video stream based on a result of determining whether the 3D video service is a 3D video service, thereby providing a 3D video service through the existing DMB. An object of the present invention is to provide a 3D video service providing method in a digital multimedia broadcasting system.

To this end, a three-dimensional video service transmission method in a digital multimedia broadcasting system, comprising: a stream encoding step of encoding a three-dimensional video stream; Inserting the encoded 3D video stream into a main service channel, inserting signaling information about the inserted 3D video stream into a fast information channel, and then ensembling an ensemble frame including the main service channel and the fast information channel. Generating an ensemble frame; And a transmission step of modulating and transmitting the generated ensemble frame to the terrestrial DMB standard.

Terrestrial DMB, 3D Video Service, Signaling

Description

Method of Providing 3D Video Service in Digital Multimedia Broadcasting System {Method of Providing Three-Dimensional Video Service in Digital Multimedia Broadcasting System}

The present invention relates to a method for providing a 3D video service in a digital multimedia broadcasting system. More particularly, in order to provide a 3D video service in a digital multimedia broadcasting system, a transmitting side transmits a 3D video stream and signaling information thereof to a user application. The receiver inserts and transmits the video stream based on a result of determining whether it is a 3D video service by analyzing the 3D video stream obtained from the broadcast stream and signaling information thereof. The present invention relates to a 3D video service providing method in a digital multimedia broadcasting system that can use a 3D video service.

The present invention is derived from the research conducted as part of the next generation core technology development project of the Ministry of Information and Communication and the Ministry of Information and Communication Research and Development. [Task Management Number: 2005-S-403-02, Title: Intelligent Integrated Information Broadcasting (SmaR TV) ) Technology Development].

Terrestrial DMB refers to a broadcast standard that adds a video service based on the European-style Eureka-147 Digital Audio Broadcasting (DAB), which was the center of audio services in the mobile state. Since video services in terrestrial DMB are provided on the go, users can use video broadcasting services anytime and anywhere, and the spread of video services is accelerating. Thus, as the terrestrial DMB service is activated and the number of users increases, the form of the video service due to the needs of users is diversified.

As such, a variety of high-quality services have emerged for video services that are the mainstay of terrestrial DMB services. In particular, 3D video broadcasting service through a personal portable terminal among video services is emerging as a new video service. At the time when interest in 3D video services is increasing, terrestrial DMB systems require definitions for providing 3D video services, and signaling methods related to 3D video services are urgently required according to these definitions.

Meanwhile, the terrestrial DMB system for video service multiplexes a stream encoded with an MPEG-4 encoder into a Moving Picture Experts Group-2 (MPEG-2) transport stream, and then reconstructs the MPEG-2 TS into a DAB system. It has a structure to insert in.

In this structure, the conventional 3D video service providing technology provides a stream for 3D video service when multiplexing to MPEG-2 TS. This conventional technology is characterized by adding a three-dimensional video stream to the structure of the transport stream MPEG-2 TS to provide three-dimensional video service in the terrestrial DMB, not limited to the terrestrial DMB system. Since the conventional technology does not deal with terrestrial DMB systems, it cannot be said to be a method of providing 3D video services in terrestrial DMB. Such a conventional technology has a problem in that a 3D video service is defined in a terrestrial DMB system in order to provide a 3D video service, and there is no signaling part for the defined 3D video service.

Therefore, the above-described conventional technology defines a 3D video service in a terrestrial DMB system in order to provide a 3D video service, and there is no signaling part for the defined 3D video service, which makes it difficult to apply it to a terrestrial DMB system. And, to solve this problem is a problem of the present invention.

Therefore, in order to provide a 3D video service in digital multimedia broadcasting, a transmitter inserts and transmits a 3D video stream and signaling information thereof into a user application type, and a receiver receives a 3D video stream obtained from a broadcast stream. Providing a 3D video service in a digital multimedia broadcasting system capable of using the 3D video service through a conventional DMB by analyzing the signaling information thereof and decoding and providing a video stream based on a result of determining whether the service is a 3D video service. The purpose is to provide a method.

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 above 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.

In order to solve the problem, the present invention provides a 3D video service in digital multimedia broadcasting, and transmits the 3D video stream and its signaling information by inserting it into a user application type and transmits the received 3D video service. The 3D video stream and signaling information thereof are analyzed to decode and provide the video stream based on a result of determining whether the 3D video stream is a 3D video service.

More specifically, the present invention provides a method for transmitting a 3D video service in a digital multimedia broadcasting system, comprising: a stream encoding step of encoding a 3D video stream; Inserting the encoded 3D video stream into a main service channel, inserting signaling information about the inserted 3D video stream into a fast information channel, and then ensembling an ensemble frame including the main service channel and the fast information channel. Generating an ensemble frame; And a transmission step of modulating and transmitting the generated ensemble frame to the terrestrial DMB standard.

In addition, the present invention provides a 3D video service receiving method in a digital multimedia broadcasting system, comprising: a demultiplexing step of demultiplexing a received ensemble frame into a main service channel and a fast information channel; A high speed information channel analysis step of determining whether the corresponding video stream is a 3D video service by analyzing the high speed information channel divided in the demultiplexing step; And providing a stream to a user by decoding and synchronizing the corresponding video stream based on the determination result in the service analysis step.

As described above, the present invention proposes a configuration of a terrestrial DMB transmission system capable of a new three-dimensional video service in a terrestrial DMB system, and defines signaling information of a three-dimensional video service in a corresponding section so that such a service is possible in a real system. By inserting, there is an effect that can provide a three-dimensional video service through the existing terrestrial DMB.

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 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.

1 is a configuration diagram of an embodiment of a terrestrial DMB transmission system to which the present invention is applied.

As shown in FIG. 1, a terrestrial DMB transmission system to which the present invention is applied includes a masking pattern adapted universal sub-band integrated coding and multiplexing (MUSICAM) 101 and a DAB data service unit. (102), two-dimensional DMB video service unit 103, three-dimensional DMB video service unit 104 for a new three-dimensional video service, Ensemble multiplexer 110, Coded Orthogonal Frequency Division Multiplexing (COFDM) encoder 120, and transmitter 130.

The DAB audio service unit 101, the DAB data service unit 102, the two-dimensional DMB video service unit 103, and the three-dimensional DMB video service unit 104 are terrestrial waves according to the Digital Multimedia Broadcasting (DMB) standard. A DAB audio source, a DAB data source, a 2D DMB video source, and a 3D DMB video source, which are DMB contents, are encoded and transmitted to the ensemble multiplexer 400, respectively.

The ensemble multiplexer 400 generates an ensemble frame by multiplexing each encoded DAB audio, DAB data, 2D DMB video, and 3D DMB video source transmitted from each service unit 101 to 104.

The COFDM encoder 120 modulates the ensemble frame transmitted from the ensemble multiplexer 400 by the COFDM method and transmits the ensemble frame to the transmitter 130, and the transmitter 130 transmits the COFDM signal transmitted from the COFDM encoder 120. Transmit through DMB dedicated network.

2 is a diagram illustrating an embodiment of an ensemble frame structure for providing a 3D video service applied to the present invention.

As described above, the terrestrial DMB transmission system transmits using a frame structure called an ensemble for various broadcast services. The ensemble frame has a main service channel (MSC) including a synchronization signal for synchronizing frames, a fast information channel (FIC) for providing configuration information and service information of a broadcast program, and a stream of a broadcast program actually provided. Main Service Channel) is included.

The 3D DMB video service unit 104 inserts the 3D video stream corresponding to the 3D video service in the ensemble frame into the main service channel section, and inserts configuration information about the 3D video service stream into the high speed information channel section. . In this case, since the 3D video service through the terrestrial DMB does not exist in the related art, in order to enable such a service, the 3D video service must be defined first.

3 is a structural diagram of a data service component type in a fast information channel for providing a 3D video service according to the present invention.

As shown in FIG. 3, data service component types in a high-speed information channel for providing 3D video service according to the present invention include paging, TDC (Transparent Data Channel), DMB (Digital Multimedia Broadcasting), and embedded IP packet (Embedded). IP Packet), MOT (Multimedia Object Transfer), and the like.

The terrestrial DMB system defines a video service in a high-speed information channel in order to provide a video service in a DAB system, which was mainly an audio service, and thus provides a video service. That is, the DMB service is inserted such that the 3D video service is defined in the data service component type (DSCTy) in the fast information channel.

Here, although the defined DMB service is for 2D video service, there is no mention of 2D video service or 3D video service.

Accordingly, in the present invention, the definition of the DMB video service is used as it is in the data service component type, and the classification of the 2D video service or the 3D video service is defined by the user application type in the high speed information channel. I would like to. In view of the various types of services and classification schemes, it is desirable to define a video service in a data service component type and to define a 2D video service or a 3D video service in a user application type.

Next, the user application type in the high speed information channel for providing 3D video service will be described.

4 is a structural diagram of a user application type in a fast information channel for providing a 3D video service according to the present invention.

As shown in FIG. 4, when looking at field values for dividing a 2D video service or a 3D video service in a user application type, the user application types include TPEG (Transport Protocol Experts Group), DGPS (Differential Global Positioning System), DMB (2D), DMB (3D) for additional video, and DMB (3D) for additional 3D image information are included. Field values are defined for various services in the user application type, so that the terrestrial DMB terminal can access each service.

In particular, a user application type in a fast information channel for providing a 3D video service according to the present invention defines a field value for distinguishing a 2D video service or a 3D video service from field values not previously used.

A method of providing a 3D video service is divided into a method of providing different 2D images and a method of providing 3D image information related to one 2D image and 3D video service as follows.

First, a method of providing different 2D images is basically to provide one 2D image and another 2D image to the main service channel.

Second, a method of providing 3D image information related to one 2D image and 3D video service includes one 2D image and 3D image information for providing 3D service using the 2D image. To provide.

The signaling method of 3D video service defines 2D video service in user application type. According to an embodiment of providing a 3D video service, the signaling method of the 3D video service inserts signaling information of an additional video into a user application type or inserts signaling information of the additional 3D image information into a user application type. It is. Here, the parts defined for the 3D video service are values pre-allocated for the future new service in the terrestrial DMB standard.

5 is a configuration diagram of an embodiment of a terrestrial DMB receiving system to which the present invention is applied.

As shown in FIG. 5, a terrestrial DMB reception system for providing a 3D video service according to the present invention includes a receiver 510, a COFDM decoder 520, a demultiplexer 530, and an FIC analyzer 540. , A video service determination unit 550, a decoding and synchronization unit 560, and a display unit 570.

The receiver 510 receives a terrestrial DMB signal transmitted from the terrestrial DMB transmission system shown in FIG. 1. The receiver 510 transmits the received terrestrial DMB signal to the COFDM decoder 520. Subsequently, the COFDM decoder 520 COFDM decodes the terrestrial DMB signal transmitted from the receiver 510 and delivers the decoded signal to the demultiplexer 530.

The demultiplexer 530 demultiplexes the COFDM decoded signal (ensemble frame) by the COFDM decoder 520 to divide high-speed information channel (FIC) information including a video stream and broadcast configuration and service information. do. That is, the demultiplexer 530 divides the ensemble frame into a main service channel and a fast information channel, obtains a video stream from the main service channel, and obtains FIC information from the fast information channel. Thereafter, the video stream divided by the demultiplexing unit 530 is transferred to the decoding and synchronization unit 560, and the FIC information is transferred to the FIC analyzer 540.

The FIC analyzer 540 analyzes the data service component type information and the user application type included in the FIC information transmitted from the demultiplexer 530, and transmits the analyzed result to the video service determination unit 550. .

The video service determination unit 550 determines whether the video service is a general 2D video service or a 3D video service based on the result analyzed by the FIC analysis unit 540, and transmits the determined result to the decoding and synchronization unit 560. do.

The decoding and synchronization unit 560 decodes and synchronizes the video stream transmitted from the demultiplexer 530 based on the result determined by the video service determination unit 550. That is, when the video stream delivered from the demultiplexer 530 is an additional 3D video for a new 3D video service, the decoding and synchronization unit 560 decodes and synchronizes the video stream according to the additional 3D video. Transfer to display unit 570. In addition, when the transmitted video stream is additional 3D information for a new 3D video service, the decoding and synchronization unit 560 decodes the video stream according to the additional 3D information, synchronizes with the 2D video image, and displays the same. Transfer to section 570. On the other hand, the decoder and synchronizer 560 decodes the video stream transmitted from the demultiplexer 530 by the conventional method when the video stream is a general two-dimensional video service.

The display unit 570 may display a video stream decoded and synchronized by the decoder and synchronizer 560 to provide a 3D video service in the terrestrial DMB.

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 configuration diagram of an embodiment of a terrestrial DMB transmission system to which the present invention is applied;

FIG. 2 is a diagram for explaining an ensemble frame structure for providing a 3D video service according to the present invention; FIG.

3 is a structural diagram of a data service component type in a fast information channel for providing a 3D video service according to the present invention;

4 is a structural diagram of a user application type in a fast information channel for providing a 3D video service according to the present invention.

5 is a configuration diagram of an embodiment of a terrestrial DMB receiving system to which the present invention is applied.

* Explanation of symbols on the main parts of the drawing

101: DAB audio service unit 102: DAB data service unit

103: DMB video service unit 104: DMB video service unit

110: ensemble multiplexer 120: COFDM encoder

Claims (9)

In the 3D video service transmission method in a digital multimedia broadcasting system, A stream encoding step of encoding a three-dimensional video stream; Inserting the encoded 3D video stream into a main service channel, inserting signaling information about the inserted 3D video stream into a fast information channel, and then ensembling an ensemble frame including the main service channel and the fast information channel. Generating an ensemble frame; And A transmission step of modulating and transmitting the generated ensemble frame to a terrestrial DMB standard 3D video service transmission method in a digital multimedia broadcasting system comprising a. The method of claim 1, The ensemble frame generation step, Inserting DMB video service information into a data service component type of the fast information channel, and inserting signaling information of the inserted 3D video stream into a user application type of the fast information channel; 3D video service transmission method. The method according to claim 1 or 2, The ensemble frame generation step, When the 3D video stream includes a 2D video image and an additional 2D video image different from the 2D video image, the 2D video image and the additional video for the user application type of the fast information channel section. 3D video service transmission method in a digital multimedia broadcasting system, characterized in that the signaling information is inserted. The method according to claim 1 or 2, The ensemble frame generation step, When the 3D video stream includes a 2D video image and additional 3D video information for 3D video, the 2D video image and the additional 3D video information are included in the user application type of the fast information channel section. 3D video service transmission method in a digital multimedia broadcasting system, characterized in that for inserting signaling information for. A method for receiving a 3D video service in a digital multimedia broadcasting system, A demultiplexing step of demultiplexing the received ensemble frame into a main service channel and a fast information channel; A high speed information channel analysis step of determining whether a serviced video stream is a 3D video service by analyzing the high speed information channel divided in the demultiplexing step; And As a result of the determination in the service analysis step, if the video stream received is a 3D video service, the video streams corresponding to the 3D video service are selected based on the information included in the fast information channel, and the selected video streams are decoded and Steps to provide streams to users by performing synchronization 3D video service receiving method in a digital multimedia broadcasting system comprising a. The method of claim 5, wherein The demultiplexing step, 3D video in the digital multimedia broadcasting system, characterized in that to obtain a three-dimensional video stream from the main service channel of the received ensemble frame, the signaling information for the three-dimensional video stream from the high-speed information channel of the ensemble frame. How to receive service. The method according to claim 5 or 6, The high speed information channel analysis step, Digital multimedia characterized in that it is determined whether the corresponding video stream is a three-dimensional video service by analyzing the data service component type information and the user application type included in the fast information channel information of the fast information channel divided in the demultiplexing step. 3D video service receiving method in a broadcasting system. The method of claim 7, wherein The stream providing step, When the obtained three-dimensional video stream includes a two-dimensional video video, and the additional two-dimensional video other than the two-dimensional video video, characterized in that for decoding the three-dimensional video stream according to the additional two-dimensional video 3D video service receiving method in digital multimedia broadcasting system. The method of claim 7, wherein The stream providing step, When the obtained three-dimensional video stream includes a two-dimensional video video and additional three-dimensional video information for the three-dimensional video, characterized in that for decoding the three-dimensional video stream according to the additional three-dimensional video information 3D video service receiving method in digital multimedia broadcasting system.

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