KR101414684B1 - An apparatus and method for inserting multimedia data in multimedia system - Google Patents

Abstract

The present invention relates to a method and an apparatus for inserting and providing contents at a point in time that is unsynchronized when switching from two-dimensional multimedia data to three-dimensional multimedia data or from three-dimensional multimedia data to two-dimensional multimedia data in a multimedia system in which two- To a multimedia receiving apparatus and method.
A method of receiving multimedia data according to an exemplary embodiment of the present invention includes the steps of storing content for synchronization in advance, receiving two-dimensional or three-dimensional multimedia data, receiving the multimedia data as the three- The method comprising the steps of: demultiplexing the first and second images into a first image and a second image; and when the display of the 3D multimedia data is requested during the display of the 2D multimedia data, Dimensional multimedia data, the method comprising the steps of: if the synchronization of the first video and the second video is not matched, / RTI >

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus and a method for receiving multimedia data in a multimedia system,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for receiving multimedia data in a multimedia system, and more particularly, to an apparatus and method for receiving multimedia data in a multimedia system in which two-dimensional and three-dimensional multimedia data are mixed.

Currently, the broadcasting system is a mixture of analog broadcasting system and digital broadcasting system. The analog broadcasting system has made a lot of progress from the broadcasting based on the initial black and white to the broadcasting based on the color. However, interest in digital broadcasting systems is increasing due to the difficulties of transmission / reception of analog broadcasting systems, the drawbacks of noise effects, and the demand for more services by users.

Therefore, although the existing analog broadcasting system and the digital broadcasting system coexist in the present broadcasting system, due to the disadvantage of the analog broadcasting system and the demands of the user's more services, the analog broadcasting system gradually changes to the digital broadcasting system .

A digital broadcasting system is a broadcasting system that processes all broadcasting, including production, editing, transmission, and reception, as digital signals, and is entering the era of three-dimensional stereoscopic broadcasting (3DTV), which provides a stereoscopic effect beyond high-definition HDTV. The 3DTV includes a stereoscopic 3DTV service and a multi-view TV service. The stereoscopic 3DTV service is a service for providing stereoscopic effect at a single view using a left eye image and a right eye image, and a multi-view TV service is a service for providing a stereoscopic feeling in various directions using images photographed through one or more cameras .

In the case of stereoscopic 3DTV service, compatibility with existing 2D multimedia data is generally regarded as the most important requirement. If two-dimensional multimedia data and three-dimensional multimedia data are used in combination on the receiving side, the transmitting side transmits signaling information to the two-dimensional multimedia data and the three-dimensional multimedia data in order to distinguish the two- And transmits it to the receiving side. Then, the receiving side can automatically convert the viewing mode from the two-dimensional multimedia data to the three-dimensional multimedia data or from the three-dimensional multimedia data to the two-dimensional multimedia data using the signaling information.

In addition, the user can request the viewing mode to the terminal using an input interface, for example, a remote controller, and the terminal can receive 3D multimedia data from 2D multimedia data or 3D multimedia data from 3D multimedia data, To switch the viewing mode.

However, when the left eye image and the right eye image are synchronized in order to switch the viewing mode from two-dimensional multimedia data to three-dimensional multimedia data or from three-dimensional multimedia data to two-dimensional multimedia data, The buffering units of the left eye image and the right eye image are different, and discontinuous points may occur in the synchronization process. In addition, a phenomenon may occur that the screen is not smoothly switched when the viewing mode is switched at the terminal.

Accordingly, an object of the present invention is to provide an apparatus and method for receiving multimedia data in a multimedia system.

It is another object of the present invention to provide a method and apparatus for converting 2D multimedia data to 3D multimedia data in a multimedia system in which 2D and 3D multimedia data are mixed, And an apparatus and method for receiving multimedia data by inserting and broadcasting contents.

According to an aspect of the present invention, there is provided a multimedia data receiving apparatus including a storage unit for storing content for synchronization in advance, a display unit for displaying 3D multimedia data while displaying 2D multimedia data, And a control unit for controlling the content to be synchronized beforehand stored in the storage unit during a discontinuity interval occurring in a synchronization interval of the 3D multimedia data.

A method of receiving multimedia data according to an exemplary embodiment of the present invention includes the steps of storing content for synchronization in advance, receiving two-dimensional or three-dimensional multimedia data, receiving the multimedia data as the three- The method comprising the steps of: demultiplexing the first and second images into a first image and a second image; and when the display of the 3D multimedia data is requested during the display of the 2D multimedia data, Dimensional multimedia data in a discontinuous period occurring in a synchronization interval of the 3D multimedia data when the synchronization between the first video and the second video is not matched, The method comprising the steps of:

The present invention relates to a method and system for inserting contents at a time point that is not synchronized when switching from two-dimensional multimedia data to three-dimensional multimedia data or from three-dimensional multimedia data to two-dimensional multimedia data in a multimedia system in which two- It is possible to prevent the screen from being disconnected to the user by broadcasting, and to provide guidance on multimedia data conversion or to generate profit through advertisement video.

1 is a schematic view illustrating an internal structure of a multimedia data receiving apparatus in a multimedia system according to an embodiment of the present invention;
2 illustrates a process of displaying contents stored in the storage unit 107 at a discontinuity point generated when two-dimensional multimedia data and three-dimensional multimedia data are synchronized in a data receiving apparatus of a multimedia system according to an embodiment of the present invention drawing,
3 is a diagram schematically illustrating a process of receiving multimedia data in a multimedia system according to an embodiment of the present invention.

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the present invention, in a multimedia system in which two-dimensional and three-dimensional multimedia data are mixed, a content is inserted and provided at a point in time when the two-dimensional multimedia data is converted into three-dimensional multimedia data or when three- An apparatus and method for receiving multimedia data are proposed.

Hereinafter, the transmission of multimedia data will be schematically described before describing the present invention. Unlike the transmission of analog broadcasting, transmission of digital broadcasting can convert all broadcasting such as production, editing, transmission, and reception into digital, thereby providing broadcasting with high image quality compared with analog broadcasting.

Generally, the digital broadcast is transmitted by wire or wireless. A typical method for transmitting digital broadcasting using a wired line is IPTV (Internet Protocol Television). On the other hand, there are various methods of transmitting digital broadcasting using radio. In general, a broadcasting station can transmit digital broadcasting directly or via a repeater using air waves. In addition, digital broadcasting can be transmitted to a set-top box in the house using a satellite.

In the above description, a method of transmitting digital broadcasting using wired and wireless has been described. In addition to the above method, a digital broadcasting can also be transmitted. The receiving apparatus of the present invention according to the conversion from the two-dimensional multimedia data to the three-dimensional multimedia data receives the broadcast multimedia data transmitted through the wired / wireless transmission process as described above.

Hereinafter, the internal structure of the multimedia data receiving apparatus in the multimedia system according to the embodiment of the present invention will be described in more detail with reference to FIG.

1 is a diagram schematically illustrating an internal structure of a multimedia data receiving apparatus in a multimedia system according to an embodiment of the present invention. 1 is a diagram illustrating a structure having a receiver when multimedia data is wirelessly transmitted. When the multimedia data is transmitted through the wire, it does not have an antenna, and the internal structure of the receiver can be changed to a structure for receiving wired data.

1, the multimedia data receiving apparatus includes a receiving unit 101, a demultiplexing unit 102, a synchronizing unit 103, an inserting unit 104, a display unit 105, a control unit 106, 107, an input unit 108, and a content providing unit 109. The synchronization unit 103 includes a first buffer 113 and a second buffer 123.

The receiving unit 101 receives the multimedia data wirelessly transmitted from the broadcasting station. The demultiplexer 102 outputs the multimedia data received from the receiver 101 under the control of the controller 106, or demultiplexes the multimedia data into a first image and a second image. Here, when the multimedia data received from the receiving unit 101 is directly output, it may be the case that the received multimedia data provides only two-dimensional multimedia data. That is, when only two-dimensional multimedia data is provided, since different image data are not received, the demultiplexer 102 provides only a bypass path.

On the other hand, when the multimedia data received from the receiver 101 is demultiplexed into a first image and a second image under the control of the control unit 106, the received multimedia data provides three-dimensional multimedia data It can be the case. The first image and the second image output from the demultiplexer may be different according to a method of providing 3D multimedia data. First, a case where three-dimensional multimedia data is provided using a left eye image and a right eye image will be described as an example.

The left eye image and the right eye image may be encoded or received by different heterogeneous codecs or may be received as different types of data in different frames or in the same frame. Accordingly, the demultiplexing unit 102 demultiplexes the left eye image and the right eye image, and outputs the result. The processing of the different images, i.e., the left eye image and the right eye image, will be further described in the synchronization unit 103 described later.

As another example, in the case where the depth information of the two-dimensional image and the two-dimensional image are received, the degree of depth of the two-dimensional image and the two-dimensional image may be encoded by different codecs different from each other, They can be received as different kinds of data in the same frame. Therefore, the demultiplexing unit 102 demultiplexes and outputs the depth information of the two-dimensional image and the two-dimensional image as described above.

The synchronization unit 103 includes the first buffer 113 and the second buffer 123 therein. Accordingly, when the multimedia data received from the receiver 101 is two-dimensional multimedia data, the image can be stored in one buffer of the first buffer 113 or the second buffer 123. [

If the multimedia data received from the receiver 101 is two-dimensional multimedia data, the synchronization unit 103 may directly output the two-dimensional multimedia data without buffering. In the case of providing only two-dimensional multimedia data, buffering is not necessary since different images are not received. Therefore, the synchronization unit 103 may directly output the two-dimensional multimedia data without buffering.

On the other hand, if the multimedia data received from the receiver 101 is 3D multimedia data, it may require buffering. This is because, if the multimedia data received from the receiver 101 is 3D multimedia data, two different images are received to provide 3D multimedia data. For example, when a three-dimensional image is received by receiving a left-eye image and a right-eye image, data sizes of the left eye image and the right eye image may differ from each other when the different types of codecs are rendered different from each other.

Therefore, in this case, it is only necessary to synchronize the left eye image and the right eye image to provide a three-dimensional image. Therefore, if the left eye image is stored in the first buffer 113 to provide three-dimensional multimedia data, the right eye image is stored in the second buffer 123. Here, the storage positions of the left eye image and the right eye image may be mutually different.

As another example, when receiving depth information together with a two-dimensional image, the size of the two-dimensional image and the depth information may be different. Accordingly, if the two-dimensional image is to be stored in the first buffer 113, the depth information is stored in the second buffer 123. As described above, the synchronization unit 103 stores the two-dimensional image and the depth image in the first buffer 113 and the second buffer 123, respectively, and adjusts the mutual synchronization.

The control unit 106 can determine whether the multimedia data received from the receiving unit 101 is two-dimensional multimedia data or three-dimensional multimedia data. Accordingly, when the multimedia data received from the receiving unit 101 is two-dimensional multimedia data, the control unit 106 sets the two-dimensional multimedia data in the demultiplexing unit 102 not to be demultiplexed. This is because there is no data to be demultiplexed in the case of two-dimensional image data.

When the multimedia data received from the receiving unit 101 is two-dimensional multimedia data, the controller 106 transmits only the multimedia data to the buffer of either the first buffer 113 or the second buffer 123 of the synchronization unit 103 Or to prevent buffering of the multimedia data.

If the multimedia data received from the receiving unit 101 is three-dimensional multimedia data, the controller 106 may check a preset image providing mode by the user. The image providing mode may be detected through a value stored in a memory (not shown in FIG. 1) included in the control unit 106 or an external separate memory. The image providing mode may be received from a user using a mouse, keyboard, remote control, voice, etc., and may be stored in a memory included in the controller 106 or in a separate external memory.

If the multimedia data received from the receiving unit 101 is three-dimensional multimedia data, if the user sets a preset image providing mode to provide the two-dimensional multimedia data as a basis, the control unit 106 controls the multimedia And controls so that the data can only be two-dimensional multimedia data.

On the other hand, when the multimedia data received from the receiving unit 101 is two-dimensional multimedia data, if the user sets a preset image providing mode to provide the three-dimensional multimedia data first, When data is changed from two-dimensional multimedia data to three-dimensional multimedia data, control for providing three-dimensional multimedia data must be performed. The storage unit 107 and the inserting unit 104, which will be described later, will be described below.

On the other hand, when the multimedia data received from the receiving unit 101 is set to provide three-dimensional multimedia data or the image providing mode preset by the user to provide the two-dimensional multimedia data, there are two cases. First, the first and second images are received by the synchronization unit 103 and are buffered in the first buffer 113 and the second buffer 123, respectively.

In this case, the synchronization unit 103 synchronizes the first image and the second image with the first buffer 113 and the second buffer 123, respectively. Therefore, the synchronization unit 103 always synchronizes the two-dimensional multimedia data with the three- It is possible to switch. Therefore, when the synchronization unit 103 receives both the first image and the second image and stores the first image and the second image in the first buffer 113 and the second buffer 123, the control unit 106 outputs the 3D multimedia data The input unit 108 can immediately provide the 3D multimedia data even when the user is requested to switch to the 3D multimedia data.

In the second case, the information on the 3D multimedia data is received. However, since the preset image providing mode is set as the 2D multimedia data by the user, the synchronizing unit 103 synchronizes the first image or the second image Or buffering of image data is not performed. In such a case, when the user is requested to switch from the input unit 108 to the 3D multimedia data while outputting the 2D multimedia data, the control unit 106 can not immediately provide the 3D multimedia data.

In order to output 3D multimedia data according to a user's request, the controller 106 controls the demultiplexer 102 to demultiplex the 3D multimedia data into a first video and a second video and output the 3D video data. Here, the first image and the second image that are demultiplexed and outputted according to a method of providing 3D multimedia data may be different, and a detailed description thereof will be made with reference to the demultiplexing unit 102, .

The control unit 106 stores the demultiplexed first and second images in the first buffer 113 and the second buffer 123, respectively, and controls them to synchronize with each other. For example, the controller 106 controls the first buffer 113 and the second buffer 123 to synchronize the first and second images stored in the first buffer 113 and the second buffer 123, respectively, using multimedia data switching information (program switching information) Can be controlled.

The program switching information is information for switching from two-dimensional multimedia data to three-dimensional multimedia data or switching from three-dimensional multimedia data to two-dimensional multimedia data. The control unit 106 controls the first buffer 113 and the second buffer 123 ), And controls to output the 3D multimedia data according to a user's request by comparing the program switching information.

Hereinafter, the program switching information will be described in more detail with reference to Table 1 below, taking the stereoscopic program descriptor system as an example. Table 1 below is a stereoscopic program descriptor. The transmitting side defines a stereoscopic program descriptor, inserts the program switching information into a PMT (Program Map Table), and transmits it to the receiving unit 101 via wire / wireless. In addition, in the case of an Internet TV, a cable TV, or an Internet Protocol Television (IPTV), the program switching information may be provided to the receiving unit 101 through a bidirectional connection.

The stereoscopic program descriptor includes a descriptor tag, a descriptor length, a 3D flag (3D_flag), and the like. The descriptor tag may have the value "OxC0" as the identification tag value of the stereoscopic program descriptor. The descriptor length includes length information of the stereoscopic program descriptor. The 3D flag is discrimination information for discriminating whether the program currently being played is two-dimensional multimedia data or three-dimensional multimedia data.

As another example, the controller 106 may control the images stored in the first buffer 113 and the second buffer 123 to be synchronized using the PTS and the DTS. The PTS includes an actual reproduction start time after decoding the video data, restoring the screen projection start time and the audio data, and the DTS includes a time at which the video data is restored.

The controller 106 may control the first and second images stored in the first buffer 113 and the second buffer 123 to be synchronized with each other using the post-decoding information included in the PTS and the DTS. In addition, the control unit 106 can control the discontinuous points when the first and second images stored in the first buffer 113 and the second buffer 123 are not synchronized, respectively.

If the discontinuity occurs, the user may temporarily stop or flicker due to the synchronization delay when switching from the two-dimensional multimedia data to the three-dimensional multimedia data. In order to solve such a problem, the control unit 106 controls the display unit 105 to display content stored in the storage unit 107, for example, advertisement text, image, video, As shown in FIG. The display unit 105 may be a liquid crystal display (LCD), a monitor, a television, and the like.

The control unit 106 controls the content stored in the storage unit 107 to be displayed at a discontinuous point and then determines whether the first video and the second video are synchronized with each other in the first buffer 113 and the second buffer 123 . If the first image and the second image stored in the first buffer 113 and the second buffer 123 are not synchronized with each other, the control unit 106 displays the contents stored in the storage unit 107 at the discontinuous point, Respectively.

The control unit 106 repeats the process of controlling the contents to be displayed at the discontinuous points until the first video and the second video are synchronized with the first buffer 113 and the second buffer 123, respectively. The storage unit 107 receives various types of information edited and manufactured by a broadcasting station, various information providers, and users by wire or wireless, and stores the received information.

Hereinafter, the process of converting the 2D multimedia data to the 3D multimedia data in the multimedia data receiving apparatus of the multimedia system according to the embodiment of the present invention will be described in more detail with reference to FIG.

2 is a diagram schematically illustrating a process of converting a 2D multimedia data to a 3D multimedia data in a multimedia data receiving apparatus of a multimedia system according to an embodiment of the present invention.

Referring to FIG. 2, the receiving unit 101 receives multimedia data transmitted from a broadcasting station in a wireless manner. The demultiplexer 102 outputs the multimedia data received from the receiver 101 under the control of the controller 106, or demultiplexes the multimedia data into a first image and a second image.

Here, when the multimedia data received from the receiving unit 101 is directly output, it may be the case that the received multimedia data provides only two-dimensional multimedia data. This is because, if only two-dimensional multimedia data is provided, different image data is not received, so that the demultiplexer 102 provides only a bypass path.

On the other hand, when the multimedia data received from the receiver 101 is demultiplexed into the first image and the second image under the control of the control unit 106 and the received multimedia data provides the 3D multimedia data .

The synchronization unit 103 includes the first buffer 113 and the second buffer 123 therein. Accordingly, when the multimedia data received from the receiver 101 is two-dimensional multimedia data, the image can be stored in one buffer of the first buffer 113 or the second buffer 123. [

On the other hand, if the multimedia data received from the receiver 101 is three-dimensional multimedia data, it may require buffering. This is because if the multimedia data received from the receiver 101 is 3D multimedia data, two different data are received in order to provide 3D multimedia data.

Here, the case where the multimedia data received from the receiving unit 101 is set to provide the 3D multimedia data or the image providing mode first provides the 2D multimedia data will be described. Since the multimedia data received by the receiving unit 101 receives the 3D multimedia data but provides the 2D multimedia data from the time t0 to the time t1, the synchronization unit 103 stores the image in only one buffer Dimensional multimedia data without buffering.

Assume that the 3D multimedia data conversion request of the user is inputted from the input unit 108 at time t1 while outputting the two-dimensional multimedia data as described above. However, when the receiving unit 101 receives the 3D multimedia data but the image providing mode preset by the user is set as the 2D multimedia data, the synchronizing unit 103 stores the image data in only one buffer, Since the buffering of the data is not performed, the controller 106 can immediately provide the 3D multimedia data when the 3D multimedia data conversion request of the user is inputted from the input unit 108 while outputting the 2D multimedia data none.

Accordingly, the controller 106 controls the demultiplexer 102 so that the demultiplexer 102 demultiplexes the received 3D multimedia data and outputs the 3D multimedia data in order to output the 3D multimedia data according to the user's request. The control unit 106 stores the demultiplexed first and second images in the first buffer 113 and the second buffer 123, respectively, and controls them to synchronize with each other.

At this time, when some of the two-dimensional images are buffered in the synchronization unit 103, the two-dimensional multimedia data is provided from the time t1 to the time t2. Also, it is assumed that it takes time from the time t1 to the time t3 in order to receive and synchronize all the three-dimensional multimedia data.

At this time, the time point of t2 and the time point of t3 may be the same in the receiver. That is, a discontinuous section may not exist. However, in general, since it takes a long time to receive data to switch from 2D multimedia data to 3D multimedia data, a discontinuous interval exists. Therefore, it is assumed here that the time t2 and the time t3 are not the same time.

Thus, a discontinuous section occurs until the time t3 after the provision of the two-dimensional image buffered until the time t2 is completed, which may result in a gumbling of the screen or a state of no signal for a few seconds in severe cases. Therefore, in the present invention, specific contents are provided at this time.

That is, the control unit 106 outputs the data stored in the storage unit 107 to the inserting unit 104 at the time of t2 so that the display is continuously performed. At this time, the provided content is provided from the time t2 to the time t3, and when the synchronization of the three-dimensional image is completed, the input / output path of the insertion unit 104 is switched to display the three-dimensional multimedia data again.

The process described above can be applied to a case where a two-dimensional image is provided and then an image is converted into a three-dimensional image, and the three-dimensional image is preferentially provided in the receiver. Hereinafter, the process of receiving multimedia data in the multimedia system according to the embodiment of the present invention will be described in more detail with reference to FIG.

3 is a diagram schematically illustrating a process of receiving multimedia data in a multimedia system according to an embodiment of the present invention.

Referring to FIG. 3, in step 301, the receiving unit 101 receives multimedia data transmitted from a broadcasting station in a wireless manner. In step 302, the controller 106 determines whether the multimedia data received from the receiver 101 is two-dimensional multimedia data or three-dimensional multimedia data.

If the multimedia data received from the receiving unit 101 is determined to be two-dimensional multimedia data in step 302, the demultiplexing unit 102 sets the two-dimensional multimedia data not to be demultiplexed, In the case where the multimedia data is two-dimensional multimedia data, the multimedia data is stored only in the buffer of one of the first buffer 113 and the second buffer 123 of the synchronization unit 103, or the multimedia data is not controlled to be buffered can do.

After the above process, the process moves to step 307 to display the 2D multimedia data. However, if the multimedia data received from the receiving unit 101 in step 302 is 3D multimedia data, the flow proceeds to step 303, where it is determined whether the image providing mode preset by the user is 2D multimedia data or 3D multimedia data.

The image providing mode can be detected through a value stored in a memory included in the control unit 106 or in an external separate memory or the like. If it is determined in step 303 that the image providing mode is set to provide two-dimensional first, step 307 is performed to display the two-dimensional multimedia data.

However, if the image providing mode is set to provide the 3D multimedia data in step 303, the controller 106 displays the 3D multimedia data in step 304 in order to output the 3D multimedia data according to the user's request. Multiplexes the demultiplexed first and second images into the first buffer 113 and the second buffer 123, respectively, and controls them to synchronize with each other Then, it is judged whether or not a discontinuity point has occurred.

 If it is determined in step 304 that a discontinuity point has not occurred, the flow advances to step 307 to display the 3D multimedia data. However, if it is determined in step 304 that a discontinuity has occurred, the control unit 106 controls the insertion unit 104 to transmit content stored in the storage unit 107, for example, an advertisement text, an image, And controls the display unit 105 to display a discontinuous point (discontinuous section).

Then, in step 306, the controller 106 determines whether the first and second images stored in the first and second buffers 113 and 123 are synchronized with each other. If the first and second images stored in the first buffer 113 and the second buffer 123 are synchronized with each other in step 306, the flow advances to step 307 to display the 3D multimedia data.

However, if the first and second images stored in the first buffer 113 and the second buffer 123 are not synchronized with each other in step 306, the control unit 106 controls the first buffer 113 and the second buffer 123, Images, video, and the like stored in the storage unit 107 until the first and second images stored in the second buffer 123 are synchronized with each other through the inserting unit 104, On the display unit 105. [0043] FIG.

The present invention has been described above with reference to preferred embodiments thereof. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. The disclosed embodiments should, therefore, be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

101: Receiving unit 102: Demultiplexing unit
103: synchronization unit 113: first buffer
123: second buffer 104:
105: display unit 106:
107: storage unit 108: input unit
109: Content provider

Claims (8)

A multimedia data receiving apparatus comprising:
A storage unit for storing contents for synchronization in advance,
When a display of three-dimensional multimedia data is required during the display of the two-dimensional multimedia data, control is performed to provide content for synchronization, which is stored in advance in the storage section during a discontinuity section generated in the synchronization section of the three-
And transmitting the multimedia data.
The method according to claim 1,
A receiving unit for receiving and outputting the two-dimensional or three-dimensional multimedia data;
A demultiplexer for demultiplexing the first and second images when receiving the 3D multimedia data from the receiver,
A synchronization unit for detecting and outputting synchronization between the first image and the second image and outputting the first image and the second image in synchronization with each other;
Further comprising an insertion unit for outputting an output of the synchronization unit or one of contents for synchronization stored in advance in the storage unit,
Wherein,
And controls the content to be provided during a discontinuous interval occurring in a synchronization interval of the 3D multimedia data.
The method of claim 1,
A broadcast station, an information provider, or a user device, and is received through at least one of a broadcast signal, the Internet, and an infrared ray.
3. The apparatus of claim 2, wherein the first image and the second image are <
A left eye image and a right eye image, or a two-dimensional image and depth information.
A method for receiving multimedia data,
Storing content for synchronization in advance;
Receiving two-dimensional or three-dimensional multimedia data;
Demultiplexing the received multimedia data into a first image and a second image when the received multimedia data is the 3D multimedia data,
Detecting whether the first image and the second image are synchronized when display of the 3D multimedia data is requested during displaying the 2D multimedia data,
And displaying content for synchronization, which is stored in advance in a storage unit during a discontinuous interval occurring in a synchronization interval of the 3D multimedia data when the synchronization between the first video and the second video is not matched
And transmitting the multimedia data.
6. The method of claim 5,
When the display of the two-dimensional multimedia data is requested while displaying the three-dimensional multimedia data, controlling to provide the two-dimensional multimedia data
And transmitting the multimedia data.
6. The method according to claim 5,
A broadcast station, an information provider, or a user device, and is received through at least one of a broadcast signal, the Internet, and an infrared ray.
6. The method of claim 5, wherein the first image and the second image are <
A left eye image and a right eye image, or a two-dimensional image and depth information.

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