KR101360264B1 - Method for broadcasting service - Google Patents

Abstract

The present invention relates to a broadcast service method and an apparatus thereof.

In the present invention, the broadcast service apparatus on the transmitting side receives the broadcast mode indicator in the program map table corresponding to the control information of the transport stream and receives whether the transmitted transport stream corresponds to a 2D broadcast program or a 3D broadcast program. Inform on the side. Accordingly, the broadcast service apparatus on the receiving side extracts broadcast mode information of the transport stream from the received transport stream, and automatically controls the decoding method and the parallax barrier of the transport stream according to the extracted broadcast mode information.

Broadcast Service, 3D, Parallax Barrier, 3D Broadcast

Description

Broadcast service method {Method for broadcasting service}

The present invention relates to a broadcast service method and an apparatus thereof. In particular, the present invention relates to a broadcast service method and apparatus for providing a two-dimensional (2D) and three-dimensional (3D) broadcast program mixedly on a digital multimedia broadcasting base.

The present invention is derived from the research conducted as part of the IT new growth engine core technology development project of the Ministry of Information and Communication and the Ministry of Information and Telecommunications Research and Development. Technology development].

In a conventional broadcast service, a user sets a broadcast service device on a receiving side separately to directly switch a broadcast program providing mode, and adds a recognition code of a 3D broadcast program to a specific position in the image data of the 3D broadcast program on the transmitting side. When inserted and provided, it is possible to provide a 3D broadcast program to the user through a method of converting the broadcast service device on the receiving side into a 3D broadcast program providing mode by analyzing it.

However, when a user directly inputs a broadcast program providing mode switch, the user may arbitrarily select a providing mode irrespective of the providing mode of the service program, which is inefficient and causes inconvenience to the user. In addition, the method of inserting the recognition code of the 3D broadcast program into the image data requires adding a separate module to the broadcast service device due to the complexity of extracting the recognition code from the image data and analyzing the recognition code. There is a problem that the complexity of the broadcast service device increases.

The present invention has been made in an effort to provide a low complexity broadcast service method and apparatus for a broadcast service providing a mixture of 2D and 3D broadcast images.

A broadcast service method of a broadcast side broadcast service apparatus according to a feature of the present invention for achieving the above object,

Acquiring broadcast mode information indicating whether the input broadcast program corresponds to a 2D broadcast program or a 3D broadcast program; Encoding media data of the broadcast program into an encoded stream; And generating a transport stream including the program map table including the broadcast mode information and the encoded stream.

In addition, the broadcast service method of the receiving-side broadcast service device according to another aspect of the present invention,

Extracting broadcast mode information from control information of the received transport stream; Extracting an encoded stream from the transport stream; Generating first media data by decoding the encoded stream; Generating second media data using the first media data if the broadcast mode information corresponds to a 3D broadcast program; And playing one of the first media data and the second media data with a broadcast program.

In addition, the broadcast service apparatus according to another feature of the present invention,

A program scheduler configured to output media data of a broadcast program and broadcast mode information indicating a broadcast providing mode of the broadcast program according to a broadcast service order; An encoder for encoding the media data based on the broadcast mode information and outputting at least one of a first stream and a second stream; And a multiplexer for generating control information including the broadcast mode information and a transport stream including at least one of the first stream and the second stream.

According to another aspect of the present invention, a broadcast service apparatus includes: a demultiplexer for extracting broadcast mode information from control information of a received transport stream and extracting an encoded stream from the transport stream; Decoding the encoded stream to generate first media data, and generating second media data from the first media data when the broadcast mode information corresponds to a 3D broadcast program; And an output unit configured to control the parallax barrier based on the broadcast mode information to reproduce at least one of the first media data and the second media data as a broadcast program.

According to an embodiment of the present invention, the broadcast service device on the receiving side can simply check the broadcast mode of the corresponding transport stream through the broadcast mode indicator included in the received transport stream, thereby reducing the complexity of the broadcast service device on the receiving side. There is.

In addition, the broadcast service device on the receiving side automatically changes the decoding method and the parallax barrier according to the broadcast mode without the user input, so that the user can conveniently mix the 2D broadcast program and the 3D broadcast program. Can be provided.

In addition, a service provider that provides a broadcast service may generate additional profits by mixing a 2D broadcast program and a 3D broadcast program by inserting a 3D advertisement at a specific time or a specific scene among the 2D broadcast programs.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise. Also, the terms " part, "" module," and " module ", etc. in the specification mean a unit for processing at least one function or operation and may be implemented by hardware or software or a combination of hardware and software have.

Hereinafter, a broadcast service method and apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a structural diagram showing a broadcast service device 100 according to an embodiment of the present invention, which shows a broadcast service device on a transmitting side for transmitting broadcast service data.

Referring to FIG. 1, the broadcast service apparatus 100 of the transmitting side may include a program scheduler 110, a storage 120, an encoder 130, and a multiplexer 140. It includes.

The program scheduler 110 outputs media data, time information, and broadcast mode information of each broadcast program sequentially arranged according to the order in which the broadcast program is serviced. To this end, the program scheduler 110 schedules the order in which the broadcast programs are serviced based on the broadcast type of each broadcast program, the broadcast time of each program, etc. input from the image capturing apparatus 200. When the service order is determined, the program scheduler 110 sequentially outputs media data of each broadcast program according to the service order.

In this case, the program scheduler 110 outputs time information including scheduling information of each broadcast program and broadcast mode information indicating a broadcast providing method of each broadcast program together with the media data. Here, the media data includes image data and audio data, and in the case of a 3D broadcast program, further includes additional data necessary for generating a 3D image such as a 3D image type and depth information of the 3D broadcast program. The broadcast mode information is information indicating whether the broadcast program is a 2D broadcast or a 3D broadcast. When the broadcast program is a 2D broadcast program, the broadcast mode information is “2D”. Is set to "3D".

Meanwhile, the program scheduler 110 also stores the media data, time information, and broadcast mode information of each broadcast program sequentially arranged in the storage 120. Therefore, the encoder 130 and the multiplexer 140 described later may use the media data, time information, and broadcast mode information output from the program scheduler 110 as inputs, and the media data and time information from the storage 120. It is also possible to read and use broadcast information as input. This can be selected differently according to the real time of the broadcast program.

The encoder 130 encodes media data of each broadcast program and outputs an encoded stream. In this case, the encoded stream includes an encoded video data stream and an audio data stream. In the case of a 3D broadcast program, the encoded stream further includes a 3D additional data stream encoding 3D additional data. can do.

On the other hand, the encoding method of the encoder 130 is selected differently according to the type of broadcast service. For example, in case of DMB (Digital Multimedia Broadcasting) service, in case of 2D broadcasting program, image data is encoded by AVC (Advanced Video Coding) method, and in case of 3D broadcasting program, image data is left and right while maintaining compatibility with AVC. Encoding is performed by using the correlation between them. In addition, in the DMB service, both the 2D broadcast program and the 3D broadcast program encode audio data according to a predetermined DMB standard.

Meanwhile, the encoder 130 outputs one independent stream in the case of a 2D broadcast program as an encoded stream resulting from the encoding, and one independent stream and one dependent stream or one independent stream in the case of a 3D broadcast program. Outputs In this case, the 3D additional data stream may be included in the dependent stream when one independent stream and one dependent stream are output as a result of encoding, and may be included in the independent stream when one independent stream is output.

The multiplexer 140 outputs a transport stream (TS) by performing a multiplexing process on the encoded stream output from the encoder 130 using broadcast mode information and time information of each broadcast program. Here, the transport stream further includes PSI (Program Specific Information) corresponding to the control information as well as the encoded stream. Here, the PSI includes a program map table (PMT), and the multiplexer 140 sets a broadcast mode indicator (2D / 3D_program_descriptor) of the PMT using the input broadcast mode information.

Table 1 below shows an example of a PMT (TS_program_map_section ()) according to an embodiment of the present invention.

[Table 1]

Referring to Table 1, a broadcast mode indicator (2D / 3D program_descriptor) is an indicator indicating broadcast mode information corresponding to a corresponding transport stream. In addition, the version information (version_number) is an indicator for notifying when a change in the PMT setting occurs, and serves to notify when the broadcast mode information is changed. Accordingly, the broadcast service apparatus on the receiving side can know in advance that the broadcast program is changed from 2D to 3D or from 3D to 2D, so that the user can be notified in advance of the start of the 3D broadcast program using a message or the like.

Meanwhile, the multiplexing process performed by the multiplexer 140 may be differently selected according to the type of broadcast service, similarly to the encoding process.

For example, when the type of broadcast service is a DMB service, the multiplexer 140 performs multiplexing based on the MPEG-2 system standard. According to the MPEG-2 system standard, an audio data stream and a video data stream of a broadcast program are each represented by one object and included in a transport stream. In addition, one object includes an object descriptor for each of the audio data stream and the image data stream.

Meanwhile, according to an exemplary embodiment of the present invention, an object descriptor structure for an image data stream is differently set according to broadcast mode information. In the case of a two-dimensional broadcast program, an object descriptor structure of the conventional MPEG-4 system standard is used, and in the case of a three-dimensional broadcast program, it is set differently according to the output of the encoder 130. That is, when an encoded stream divided into independent and dependent streams is output to the output of the encoder 130, one object descriptor includes an elementary stream descriptor (ESD) and a dependent elementary stream descriptor. When one independent stream is output to the output of the encoder 130, the object descriptor structure is set to include one independent elementary stream descriptor.

Meanwhile, in the embodiment of the present invention, a case in which the broadcast service is a DMB service has been described as an example. However, the present invention may be applied to other broadcast services that provide a mixture of a 2D broadcast program and a 3D broadcast program. When the present invention is applied to other broadcast services, encoding and multiplexing are performed according to the standard of the corresponding broadcast service.

2 illustrates a broadcast service device 300 according to an exemplary embodiment of the present invention, and illustrates a broadcast service device on a receiving side for receiving broadcast service data.

Referring to FIG. 2, the broadcast service device 300 on the receiving side includes a demultiplexer 310, a decoder 320, and an output unit 330.

The demultiplexer 310 extracts the encoded stream and broadcast mode information by analyzing the transport stream input through the demultiplexing process. Here, the broadcast mode information is extracted through PSI analysis included in the transport stream. PSI is control information necessary to perform demultiplexing and includes a PMT including a broadcast mode indicator. On the other hand, the encoded stream includes an encoded image data stream and an audio data stream, and further includes an encoded three-dimensional additional data stream when the transport stream corresponds to a three-dimensional broadcast program. Meanwhile, the demultiplexer 310 extracts version information from the PMT, and when the extracted version information indicates that the broadcast mode is changed, the demultiplexer 310 provides a broadcast to the user in the form of a message through the output unit 330 that the broadcast providing mode is changed. It further includes a function for notifying a mode change in advance.

The decoder 320 includes a decoding module 321 and a 3D image generating module 322. The decoding module 321 decodes the encoded video data stream and audio stream and outputs media data. In this case, the media data includes audio data and 2D image data, and when the encoded stream corresponds to a 3D broadcast program, further includes 3D additional data obtained by decoding the encoded 3D additional data stream.

When the extracted broadcast mode information corresponds to a 3D broadcast program, the 3D image generation module 322 outputs 3D media data including 3D image data using the media data output from the decoding module 321. do. On the other hand, when the broadcast mode information corresponds to the 2D broadcast program, the output of the decoding module 321 is directly transmitted to the output unit 330.

Meanwhile, the broadcast service device 300 may change a broadcast providing mode arbitrarily by a user. In this case, when the broadcast providing mode of the broadcast service device 300 is switched to the 3D broadcast mode by the user, the output of the decoding module 321 is output through the 3D image generating module 322, but the broadcast mode information is In the case of a two-dimensional broadcast program, only the output of the decoding module 321 to the output unit 330 is performed without a separate operation.

Meanwhile, the 3D image generating module 322 further includes a function of adjusting and outputting a 3D effect when generating 3D media data based on the 3D control information received from the user.

The output unit 330 plays a media data or 3D media data output from the decoder 320 and delivers a 2D broadcast program or 3D broadcast program to a user. Meanwhile, the output unit 330 includes a parallax barrier for displaying a 3D broadcast program and automatically controls the parallax barrier based on the extracted broadcast mode information. That is, when the broadcast mode information corresponds to the 3D broadcast program, the parallax barrier is turned on, and when the broadcast mode information corresponds to the 2D broadcast program, the parallax barrier is automatically turned off.

3 is a flowchart illustrating a broadcast service method according to an exemplary embodiment of the present invention, and illustrates a method in which the broadcast service apparatus 100 of a transmitting side provides a broadcast service.

Referring to FIG. 3, when a broadcast program is input (S101), the broadcast service device 100 analyzes a broadcast program input through the program scheduler 110 to obtain broadcast mode information of a corresponding broadcast program (S102).

Thereafter, the broadcast service device 100 encodes media data of a broadcast program input through the encoder 130 to generate an encoded stream (S103). Here, the media data includes image data and audio data, and further includes three-dimensional additional data when the broadcast program is a three-dimensional broadcast program. Therefore, the encoded stream includes a video data stream encoding video data and an audio data stream encoding audio data. When the broadcast program is a 3D broadcast program, the encoded stream includes a 3D additional data stream encoding 3D additional data. It includes more. Accordingly, the encoder 130 outputs one independent stream as the encoding result of the 2D broadcast program, and the dependent stream including the independent stream and the encoded 3D additional data stream as the encoding result of the 3D broadcast program. Output the stream.

After encoding, the broadcast service device 100 generates a transport stream by using the multiplexer 140 (S104). Here, the transport stream includes a PMT including a broadcast mode indicator indicating a broadcast mode of a corresponding broadcast program as well as an encoded stream.

4 is a flowchart illustrating a broadcast service method according to an exemplary embodiment of the present invention, and illustrates a method of providing a broadcast service by the broadcast service device 300 on the receiving side.

Referring to FIG. 4, when the transport stream is received (S201), the broadcast service device 300 on the receiving side extracts the encoded stream and broadcast mode information from the transport stream through the demultiplexer 310 (S202). The encoded stream includes an encoded image data stream and an audio data stream, and further includes an encoded three-dimensional additional data stream when the broadcast mode information corresponds to the three-dimensional broadcast program.

When the encoded stream is extracted, the broadcast service apparatus 300 decodes the encoded stream through the decoder 320 (S203) to generate media data including audio data and two-dimensional image data. In this case, when the encoded stream corresponds to a 3D broadcast program, the media data may further include 3D additional data obtained by decoding the 3D additional data stream by the decoder 320.

When the media data is generated by decoding, the broadcast service device 300 determines whether the transport stream corresponds to the 3D broadcast program based on the extracted broadcast mode information (S204). When the transport stream corresponds to the 3D broadcast program, the 3D image generation module 322 generates 3D media data from the media data (S205). The 3D media data includes 3D image data, and the 3D image data is generated using 2D image data and 3D additional data.

Thereafter, when the 3D media data is generated, the broadcast service device 300 turns on the parallax barrier of the output unit 330 (S206) to display the 3D broadcast program (S208). On the other hand, if the decoded media data corresponds to the 2D broadcast program, the broadcast service device 300 turns off the parallax barrier (S207) and displays the 2D broadcast program (S208).

As described above, the broadcast service method according to an embodiment of the present invention adjusts the decoding process according to the broadcast providing mode only by confirming the broadcast mode information included in the control information (PMT) in the broadcast service device 300 on the receiving side. And since the parallax barrier can be controlled, the complexity of the broadcast service device 300 on the receiving side can be reduced. In addition, a user who uses a broadcast service does not need to arbitrarily select a 2D broadcast mode or a 3D broadcast mode, and thus the operation is simple. For a service provider that provides a broadcast service, a specific time or a specific time is selected from a 2D broadcast program. By inserting a three-dimensional advertising, such as in the scene has the advantage of obtaining a high advertising effect.

The embodiments of the present invention described above are not only implemented by the apparatus and method but may be implemented through a program for realizing the function corresponding to the configuration of the embodiment of the present invention or a recording medium on which the program is recorded, The embodiments can be easily implemented by those skilled in the art from the description of the embodiments described above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

1 is a structural diagram showing a broadcast service apparatus on a transmitting side according to an embodiment of the present invention.

2 is a structural diagram showing a broadcast service apparatus on a receiving side according to an embodiment of the present invention.

3 is a flowchart illustrating a broadcast service method of a transmitter according to an embodiment of the present invention.

4 is a flowchart illustrating a broadcast service method of a receiver according to an embodiment of the present invention.

Claims (20)

delete delete delete delete delete delete delete In the broadcast service receiving method of a broadcast service device, Receiving a transport stream multiplexed with video data and signaling information of the video data, Here, when the broadcast program is a three-dimensional broadcast program, the transport streams each independently include an encoded base video stream and an additional video stream; Obtaining signaling information in the received transport stream; Here, the signaling information includes a program map table (PMT), and the program map table includes a broadcast indicating whether a type of a broadcast program is a 2D broadcast program or a 3D broadcast program according to the basic video stream and the additional video streams. Includes a descriptor containing mode information, The descriptor is located after the program_info_length field field in the PMT, and the descriptor includes information for allowing a decoder of a receiver to determine a resource necessary for supporting the broadcast service. Decoding the signaling information; And And obtaining the broadcast mode information from the decoded signaling information. delete delete delete 9. The method of claim 8, And providing the broadcast service to a user according to the obtained broadcast mode information. The method of claim 12, Providing to the user, If the broadcast mode information indicates a 2D broadcast service, turning off the parallax barrier to provide the broadcast service as a 2D broadcast service, and If the broadcast mode information indicates a 3D broadcast service, turning on the parallax barrier to provide the broadcast service as a 3D broadcast service Broadcast service receiving method comprising a. delete delete delete delete delete delete delete

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