KR20120040641A - Method and apparatus for non-real time stereoscopic video service - Google Patents

Abstract

PURPOSE: A method for non real time stereoscopic video service and a device thereof are provided to synchronize a reference video and an additional video when time information of a target playing video frame is not acquired. CONSTITUTION: A broadcasting receiving device extracts a PAT(Program Association Table) in a received MPEG-2 TS(Transport Stream)(S210). The device extracts a PMT corresponding to a selected program from the MPEG-2 TS(S220). The device extracts a stereoscopic service descriptor from the extracted PMT. The device analyzes information analyzed by the stereoscopic service descriptor(S230). The device generates a playing video frame and time information(S240). The device acquires additional information corresponding to a reference information form a storage device(S250).

Description

Non-real time stereoscopic video service method and apparatus {Method And Apparatus For Non-Real Time Stereoscopic Video Service}

The present invention relates to a broadcast transmission / reception method and a broadcast transmission / reception system, and more particularly, to a broadcast transmission / reception method and a broadcast transmission / reception system for providing 3D stereoscopic broadcasting in non real time.

Stereoscopic video services provide stereoscopic images to viewers through video images of left and right views. Since stereoscopic video is provided to the viewer through images of left and right views, a stereoscopic video service needs to transmit more data than a monoscopic video service.

Meanwhile, a multiplexing of a reference video (reference video, reference data) and an additional video (additional video, additional data) together for a stereoscopic service is called a real time stereoscopic service. However, as described above, in order to provide a stereoscopic video service, a large amount of data transmission is required, and in order to transmit data of a reference video and additional video data in real time, there are difficulties such as a limitation of a data rate.

An object of the present invention is to propose a method for stably providing a non-real time stereoscopic video service.

The present invention provides a method for synchronizing the base view video with the additional view even when the time map information of the video frame to be reproduced is not obtained, for example, when the program map table is not received or the time stamp information on the frame is not received. For the purpose of

According to an embodiment of the present invention, a non-real time stereoscopic video service method performed by a transmitting apparatus includes: configuring a program association table including information on a program map table and a program map table; and a program map table and the program association. Transmitting a transport stream (TS) signal comprising a table, wherein the program map table includes a stereoscopic service descriptor for a program corresponding to the program map table, wherein the stereoscopic service descriptor is a stereoscopic video for the program. It includes information on a timestamp of starting a service and information on an access unit (AU) number from a stereoscopic video service start to a currently transmitted video image for a program.

In this case, the stereoscopic service descriptor may be included in the descriptor loop of the program map table.

In this case, the start of the stereoscopic video service may be started by a non real time (NRT) marker.

In this case, the information about the AU number from the start of the stereoscopic video service for the program to the currently transmitted video image may be an AU number of the 3D video image.

In this case, the stereoscopic service descriptor may further include image characteristic information indicating whether a transmitted image is a left image or a right image.

In this case, the image characteristic information may be described in the name of the content as identification information for distinguishing the case where the transmitted image is the left image and the case where the transmitted image is the right image.

According to another embodiment of the present invention, a non-real time stereoscopic video service method performed by a transmitting apparatus includes: configuring a stereoscopic video service descriptor, configuring a program map table and a program related table, and a program map table and a program related Transmitting a TS signal comprising a table, wherein configuring the stereoscopic video service descriptor comprises: specifying an initial timestamp value of a non-real-time stereoscopic service corresponding to the stereoscopic video service descriptor and a stereoscopic Configuring counting information of an access unit (AU) packet transmitted from the time point at which the non-real time stereoscopic service corresponding to the video service descriptor is started to the present, wherein the stereoscopic video service descriptor indicates the program. It is included in the table.

According to another embodiment of the present invention, a non-real time stereoscopic video service method performed by a receiving apparatus may include extracting and analyzing a program association table from a received TS, and a program map corresponding to a program selected by a user from the program association table. Extracting and analyzing a table; extracting and analyzing a stereoscopic video service descriptor from a program map table; generating frame and / or time information of an image to be reproduced by analyzing the stereoscopic video service descriptor; Reproducing the image by synchronizing the base image and the additional image based on the frame and / or time information, and generating the frame and / or time information of the image to be reproduced, wherein timestamp information of the image to be reproduced is lost. To determine whether If it is determined that the step and timestamp information are lost, the information on the timestamp of the start of the stereoscopic video service included in the stereoscopic video service descriptor and the access unit (AU) of the video image transmitted until the start of the stereoscopic video service are present. Generate frame and / or time information based on the information about the number.

In this case, the stereoscopic service descriptor may be included in the descriptor loop of the program map table.

In this case, the start of the stereoscopic video service may be started by a non real time (NRT) marker.

In this case, the information on the AU number of the video image transmitted to the present after the start of the stereoscopic video service for the program may be the AU number of the 3D video image.

In this case, the stereoscopic service descriptor may further include image characteristic information indicating whether the transmitted image is a left image or a right image, and in the image reproducing step, the received image according to the image characteristic information is used as the left image or the right image. Can play.

In this case, when it is determined that the time stamp information of the video to be reproduced is not lost, the reference video and the additional video may be synchronously reproduced based on the time stamp.

In this case, in the reproducing of the image, the additional image corresponding to the frame and / or time information generated from the previously stored additional images may be acquired and reproduced in synchronization with the reference image received in real time.

According to another embodiment of the present invention, a non-real time stereoscopic video service method performed by a receiving apparatus may include extracting and analyzing a program association table from a received TS, and a program map corresponding to a program selected by a user from the program association table. Extracting and analyzing a table; extracting and analyzing a stereoscopic video service descriptor from a program map table; generating time information of an image to be reproduced by analysis of the stereoscopic video service descriptor; and generating frames and / or And reproducing the image by synchronizing the base image and the additional image based on the time information, and generating the frame and / or time information of the image to be reproduced, determining whether timestamp information of the image to be reproduced is lost. Steps and times If it is determined that the dump information is lost, the AU (Access) of the video image transmitted to the present time after the start of the stereoscopic video service included in the stereoscopic video service descriptor is determined from the stereoscopic video service start time information included in the stereoscopic video service descriptor. Unit) calculates the counting number to calculate the synchronization time.

In this case, the playing of the image may be performed by synchronizing with the reference image received in real time by acquiring an additional image corresponding to the calculated synchronization time from the previously stored additional images.

According to the present invention, it is possible to stably provide a non-real time stereoscopic video service smoothly.

According to the present invention, even when time information of a video frame to be reproduced is not obtained, such as failing to receive a program map table or receiving time stamp information on a frame, the reference video and the additional video can be synchronized.

1 is a flowchart schematically illustrating an operation of a broadcast transmitting device in a system according to the present invention.
2 is a flowchart schematically illustrating an operation of a broadcast reception device in a system according to the present invention.
FIG. 3 is a flowchart illustrating an operation of generating a reproduced video frame and time information and reproducing a reference video and an additional video in FIG. 2.
4 is a block diagram schematically illustrating a transmitting device and a receiving device of a stereoscopic video service system according to the present invention.

The present invention relates to a non-real time stereoscopic video service. In the present invention, time information and frame information are described in a transport stream (TS) that is transmitted in real time, so that a packet error may not be received. Even when is generated, a signaling method through complementation between time information and frame information is provided.

In the real-time stereoscopic video service, a reference video (reference video, reference data) and an additional video (additional video, additional data) for a stereoscopic service are multiplexed together and transmitted.

On the contrary, in the non-real time stereoscopic video service, the additional video among the reference video and the additional video for the stereoscopic service is stored in advance in the receiving apparatus, and then the reference video transmitted is processed together with the additional video stored in advance for the stereoscopic video. Provide service.

In the non-real time stereoscopic video service, the reception apparatus may acquire an additional image in advance, that is, in non real time in various ways.

For example, the receiving device may download the additional video in the form of a file using a multimedia object transfer (MOT) protocol. In addition, the additional image may be downloaded through a high-speed wired Internet in the form of a file and transferred to a receiving device through a portable storage device. In addition, when the receiving apparatus supports the portable Internet, the additional video may be downloaded in advance in the form of a file through the portable internet.

1 is a flowchart schematically illustrating an operation of a broadcast transmitting device in a system according to the present invention.

In order to provide a stereoscopic video service, a transmitting side configures a stereoscopic service descriptor (Stereoscopic Service_descriptor: SS_descriptor) (S110).

The stereoscopic video service may provide only stereoscopic video or may be provided together with a service providing monoscopic video. Thus, a stereoscopic service descriptor is defined to signal information about a non-real time stereoscopic service.

The stereoscopic service descriptor may be included in a descriptor loop in a program map table (PMT), which is one of program specification information (PSI) of TS layers such as MPEG-2 and MPEG-4. In addition, the descriptor loop may be located after program_info_length in the PMT. Details of the stereoscopic service descriptor configured according to the present invention will be described later.

The transmitting side configures the PMT and the PAT to be transmitted (S120).

The PMT includes a stereoscopic service descriptor. Accordingly, a PMT corresponding to a program selected from a PAT (Program Association Table) may be extracted, and a stereoscopic service descriptor may be extracted from descriptors of the extracted PMT.

By using the extracted stereoscopic service descriptor, in the present invention, the reference video and the additional video can be accurately synchronized as described below.

The configured PMT, PAT, etc. are transmitted to the receiver as an MPEG-2 TS (Transport Stream) signal (S130).

On the other hand, the stereoscopic service descriptor may be variously configured to include information necessary to provide a stereoscopic service. As an example, the stereoscopic service descriptor may be configured to extend the SDS_descriptor defined in the standard of the Digital Multimedia Broadcasting (DMB) video linked stereoscopic data service in a compatible manner, or may use the same descriptor tag.

Table 1 is an example of a stereoscopic service descriptor (SS_descriptor) configured according to the present invention.

As shown in Table 1, the stereoscopic service descriptor may be included in a descriptor loop in the PMT, and may include the following information.

StereoMono_serviceFlag: This syntax indicates in 1 bit whether a stereoscopic video service or a monoscopic video service is provided. In the case of a stereoscopic video service, a value of 1 may be indicated using a value of 0 in the case of a monoscopic video service. The receiver may turn on / off the stereoscopic playback device according to the value of StereoMono_serviceFlag.

ServiceType: This syntax indicates the type of stereoscopic video service provided. For example, in the case of a stereoscopic video service provided by terrestrial DMB, if the value of ServiceType is (000), the terrestrial DMB corresponds to a non-real-time multimedia object transfer (MOT) / stream mode stereoscopic video service. It corresponds to a non-real time MOT / stream mode video linked stereoscopic data service, and in case of 010, it may correspond to a terrestrial DMB non-real time repeating content stereoscopic video service. Also, values such as (011) to (111) may be reserved for future stereoscopic video services, may be used for non-standard stereoscopic video services, and the syntax is extended. It can also be reserved for.

CompositionType: This syntax indicates the composition type of the stereoscopic data received (transmitting). For example, in the case of a stereoscopic video service provided in terrestrial DMB, the value of CompositionType corresponds to a basic format (e.g., left and right image equal resolution) in case of (0001), and in case of 010, an optional format (e.g. The resolution may correspond to 1/2, etc. in the horizontal direction relative to the reference image. In the case of (000), (011), (100) to (111), it may be reserved or correspond to a format other than the standard.

 LR_first: This syntax indicates whether the reference picture is the left picture or the right picture. For example, '0' may be used when the reference image is the right image, and '1' may be used when the reference image is the left image. In this case, the reference video may be multiplexed image data transmitted in real time through a transport stream.

is_Left: This syntax is image characteristic information indicating whether a transmitted image is a left image or a right image. When the video is a left video, the content name may be displayed by appending "_L", and when the video is the right video, it may be displayed by attaching "_R" to the content name.

NRT_Marker: A Non-Real Time (NRT) Marker (NRT_Marker) indicates a start position for synchronizing the left and right images, that is, the base image and the additional image. For example, in the case of a stereoscopic video service provided in terrestrial DMB, when the value of NRT_Marker is (01), the TS packet whose payload_unit_start_indicator is 1 among the video TS packets following the PMT is the last AU (non-real time stereoscopic video stream). If the value of NRT_Marker is (10), NRT_Markers of PMT transmitted between PMT with NRT_Marker 01 and PMT with NRT_Marker 11 are set to this value. If the value is (11), it is possible to indicate that the TS packet whose payload_unit_start_indicator is 1 among the video TS packets following this PMT is the packet from which the first AU of the non-real time stereoscopic video stream starts. Also, a value of (00) may be reserved.

ContentNameLength: This syntax indicates the length of the content name in bytes.

ContentName: In the non-real time stereoscopic video service, data for an additional video is first downloaded and stored, and then processed together with data of a reference video transmitted in real time. The ContentName syntax indicates information for forming a file name of a video required at this time. For example, in the case of the terrestrial DMB non-real-time MOT / stream mode stereoscopic service, the ContentName may be stored as a file name including an additional video elementary stream (ES) stored in the receiving device. In addition, in case of a terrestrial DMB non-real-time repeating content stereoscopic video service, ContentName may be used to designate a file including an additional video ES stored in the terrestrial DMB receiving device, and store the reference video ES as a file in the receiving device. Can also be used.

ExpireDate: This statement represents the recommended retention period for an ES to save as a file on the storage device. For example, in the case of terrestrial DMB non-real-time repeating content stereoscopic video service, the terrestrial DMB transmitting device recommends a retention period recommended for the ES to be stored as a file in the storage device.

FileSize: This syntax specifies the recommended minimum storage capacity for the ES to store as a file on the storage device. For example, in the case of terrestrial DMB non-real-time repeating content stereoscopic video service, the terrestrial DMB transmitting apparatus indicates a required memory capacity for an ES to be stored as a file in the terrestrial DMB receiving apparatus.

FirstAUTimeStamp: Records the service start time stamp started by NRT_Marker.

LastAUNumber: Records the AU number of the 3D video transmitted from the start of the service by the NRT_Marker to the present.

As described above, the is_Left flag of Table 1 indicates whether a currently transmitted video is a left video or a right video and is used for content storage and signaling. If is_Left is 0, the left image can be specified. If is_Left is 1, the right image can be specified. On the contrary, if is_Left is 0, the right image is displayed. If is_Left is 1, the left image is displayed. You can also specify to display an image. Therefore, the non-real time stereoscopic video service checks the is_Left flag of a stream transmitted in real time and determines whether the received stream is a left image or a right image, thereby making it suitable for composing a stereoscopic video image among stored left and right images. Can be loaded.

In addition, FirstAUTimeStamp and LastAUNumber in Table 1 may be used to synchronize the base view video and the additional view video.

FirstAUTimeStamp records a timestamp at the start time of a non-real time stereoscopic video service and provides it as synchronization information.

LastAUNumber describes the number of frames since the start of the non-real time stereoscopic video service and provides it as synchronization information.

A method of synchronizing the base view video with the additional view video using the information of FirstAUTimeStamp and LastAUNumber will be described in more detail.

In general, in the transmission standard used for broadcasting, since a frame for second value used for broadcasting is determined in advance, PES (Packetized Elementary Stream) based on PMT transmitted in real time from a TS file stored in a receiving apparatus PTS (Presentation Time Stamp) value can be calculated. Therefore, even if the PMT information is lost, it is possible to synchronize the frame of the currently transmitted video with the stored non-real time stereoscopic additional video file using the PMT transmitted later.

For example, if the number of frames per second specified in the transmission standard of the current broadcast is 30 and the value of LastAUNumber is 90, the frame of the image to be currently provided is the image provided three seconds after the non-real time stereoscopic video service is executed. Can be calculated In this case, the time at which the non-real time stereoscopic video service is executed may be determined by the FirstAUTimeStamp.

Therefore, even if the time stamp information of the stream transmitted in real time is lost, the reference video and the additional video can be synchronized using the PMT information immediately transmitted.

2 is a flowchart schematically illustrating an operation of a broadcast reception device in a system according to the present invention.

The broadcast reception device extracts a PAT included in the received MPEG-2 TS (S210). The present invention can be applied to various non-real time stereoscopic video services using MPEG-2, MPEG-4, and the like. Here, a case of serving through an MPEG-2 transport stream will be described as an example for convenience of description.

The receiving device extracts a PMT corresponding to a program selected by the user from the extracted PAT from the MPEG-2 TS (S220). The extracted PMT includes a stereoscopic service descriptor (SS_descriptor) corresponding to the selected program.

The receiving device extracts a stereoscopic service descriptor among descriptors corresponding to a program selected by a user from the extracted PMT, and analyzes information defined in the extracted stereoscopic service descriptor (S230). For example, the ServiceType information may be checked and a reference video included in the received MPEG-2 TS may be extracted based on ContentName.

The reproduced video frame and time information are generated using the received time stamp information and / or FirstAUTimeStamp and LastAUNumber flags (S240).

Based on the generated playback image frame and time information, additional information corresponding to the reference image is obtained from the storage device, and the stereoscopic image is reproduced (S250).

3 is a flowchart illustrating a process of generating a reproduced video frame and time information (S240) and reproducing a reference video and an additional video (S250) in FIG. 2.

The receiving device analyzing the information defined in the stereoscopic service descriptor determines whether time stamp information is lost (S260).

In the stereoscopic video service, left and right image synchronization means inputting a corresponding left image and a right image (a reference image and an additional image) simultaneously to a stereoscopic display.

In the non-real time stereoscopic video service, the reference video is transmitted in real time through the transport stream TS, but the additional video is transmitted in advance and stored in a storage unit (memory) of the receiving device. Therefore, in order to read and synchronize an additional image corresponding to the reference image transmitted in real time from the storage unit, information that is a temporal reference between the reference image and the additional image is required.

Information on the start time of the stereoscopic video service is carried by the NRT_Marker. That is, the position of the first frame at which the stereoscopic video service is started may be signaled by the NRT_Marker value in the stereoscopic service descriptor. NRT_Marker informs the start time of the stereoscopic video service, changes the value to indicate that the stereoscopic video service is currently provided, and changes the value to indicate that the stereoscopic video service ends.

That is, the NRT_Marker indicating the start time of the stereoscopic video service is reference information necessary for configuring the first frame of the left and right images in pairs. Therefore, the receiving device that is powered on or switched channel after NRT_Marker indicating the start time of the stereoscopic video service is stored in the memory even though the stream corresponding to the reference video of the stereoscopic content is being received. It is difficult to know which part of the additional video file to read and match the left and right images. In other words, when receiving the NRT_Marker indicating the start time of the stereoscopic video service from the beginning and synchronizing the left and right images from the first frame, it is difficult to know when the stereoscopic video service is started even if the NRT_Marker is received later. It is difficult to provide a stereoscopic video service by synchronizing the video with the additional video. However, even in this case, if two flags, FirstAUTimeStamp and LastAUNumber, are used as described above, the reference video and the additional video can be accurately synchronized.

That is, even if the NRT_Marker indicating the start time of the stereoscopic video service is not received from the beginning or lost in the middle (for example, the PMT is not received), the FirstAUTimeStamp defined in the stereoscopic service descriptor in the newly received PMT And the LastAUNumber can be used to synchronize the base view video with the additional view video. That is, FirstAUTimeStamp describes information (timestamp) relating to the service start time by NRT_Marker, and LastAUNumber describes information on which 3D image is the current 3D image after the start of service. Therefore, based on an image processing rule such as a predetermined number of frames per second, the synchronization time of the current image to be reproduced can be calculated.

The receiving device may provide a stereoscopic video service by reading an additional video corresponding to the calculated synchronization time from a storage unit (memory) of the receiving device and inputting the corresponding video to the stereoscopic display simultaneously with the corresponding reference video.

Therefore, after determining whether the timestamp information of the current image to be reproduced is lost (S260), the receiving apparatus may take a method of effectively providing a stereoscopic video service according to the determination result.

If it is determined that the timestamp information of the video to be played back is not lost, that is, if the NRT_Marker is received from the beginning indicating the start time of the stereoscopic video service, and the information on the synchronization time has not been lost since then, the current timestamp In operation S270, the reference video and the additional video may be synchronized with each other.

If it is determined that timestamp information of a video to be reproduced at present is lost, that is, when the NRT_Marker indicating the start time of the stereoscopic video service is not received at first, or the information on the synchronization time is subsequently lost, Likewise, frame information and time information may be generated using FirstAUTimeStamp and LastAUNumber (S280).

The receiving device may synchronize and reproduce the base view video and the additional view video based on frame information and time information generated using FirstAUTimeStamp and LastAUNumber (S290).

4 is a block diagram schematically illustrating a transmitting device and a receiving device of a stereoscopic video service system according to the present invention.

The transmitter 400 includes a transmitter 410, a storage 420, and a controller 430.

The transmitter 400 transmits a transport stream TS required for a video service through the transmitter 410. The transmitting device 400 may transmit a dedicated TS for a stereoscopic video service, or may transmit a TS that provides a stereoscopic video service together with the monoscopic video service. In this case, the transmitted TS includes a stereoscopic service descriptor for providing a stereoscopic video service.

The storage unit 420 stores various information necessary for transmitting data. For example, necessary information such as protocol information between the transmitting device and the receiving device, information about the reference video and the additional video, and information about the synchronization time can be stored.

The controller 430 is connected to the transmitter 410 and the storage 420 to control the transmitter 410 and the storage 420. The controller 430 configures data to be transmitted to the TS. The controller 430 may configure a PMT, a PAT, and transmit the same to a TS, and may configure a stereoscopic service descriptor for providing a stereoscopic video service. The stereoscopic service descriptor may be included in the PMT and transmitted through the transmitter 410.

The receiving device 440 includes a receiving unit 450, a storage unit 460, and a control unit 470.

The reception device 440 receives a transport stream TS required for a video service through the reception unit 450. The received transport stream may be a TS dedicated to the stereoscopic video service, or may be a TS that provides the stereoscopic video service together with the monoscopic video service. The received TS includes a stereoscopic service descriptor for providing a stereoscopic video service.

The storage unit 460 stores information necessary to provide an image together with information necessary to receive data. For example, the storage unit 460 may store an additional image received in advance, so that the additional image corresponding to the reference image may be used when it is required to be displayed together with the reference image received in real time.

The controller 470 is connected to the receiver 450 and the storage 460 to control the receiver 450 and the storage 460. The controller 470 provides a video service regarding a program selected by a user based on the received PAT and PMA in the TS. At this time, the controller 470 may start and end the stereoscopic service by the NRT_Marker described in the stereoscopic service descriptor. When the control unit 470 loses information on the NRT_Marker that starts the stereoscopic service or when time information on synchronization of the reference video and the additional video is lost, the control unit 470 and the FirstAUTimeStamp disclosed in the stereoscopic service descriptor as described above. Using LastAUNumber, the reference video and the additional video can be synchronized and played back. Meanwhile, the controller 470 checks information such as is_Left described in the stereoscopic service descriptor, and confirms whether the transmitted video, that is, the reference video is the left video or the right video, and displays the additional video along with the additional video accordingly. The image may be provided to the user.

So far, various examples have been described in order to facilitate understanding of the contents of the present invention, but the present invention is not limited to the above-described examples and may be variously implemented within the scope of the technical idea of the present invention. For example, although the transport method of the present invention has been described using a transport stream using MPEG-2 as an example, the present invention is not limited thereto and may be equally applied to MPEG-4. In addition, the present invention has been described using terrestrial DMB broadcasting as an example, but the present invention is not limited thereto, and the present invention may be equally applied to various services that provide a video service as a transport stream through the Internet or wired or wireless communication. .

In the present invention, the description "includes" a specific configuration does not exclude a configuration other than the configuration, it means that additional configuration may be included in the scope of the technical spirit of the present invention or the present invention.

In the exemplary system described above, the methods are described based on a flowchart as a series of steps or blocks, but the invention is not limited to the order of steps, and certain steps may occur in a different order or concurrently with other steps than those described above. Can be. In addition, those skilled in the art will appreciate that the steps shown in the flowcharts are not exclusive and that other steps may be included or one or more steps in the flowcharts may be deleted without affecting the scope of the present invention.

The above-described embodiments include examples of various aspects. While it is not possible to describe every possible combination for expressing various aspects, one of ordinary skill in the art will recognize that other combinations are possible. Accordingly, it is intended that the invention include all alternatives, modifications and variations that fall within the scope of the following claims.

Claims (16)

A non-real time stereoscopic video service method performed by a transmitting device,
Constructing a program association table that includes a program map table and information about the program map table; And
Transmitting a TS (Transport Stream) signal including the program map table and the program association table,
The program map table includes a stereoscopic service descriptor for a program corresponding to the program map table,
The stereoscopic service descriptor includes information on a timestamp regarding the start of a stereoscopic video service for the program and information about an access unit (AU) number from the start of the stereoscopic video service for the program to the currently transmitted video image. Service method characterized in that. The method of claim 1, wherein the stereoscopic service descriptor is included in a descriptor loop of a program map table. The method of claim 1, wherein the stereoscopic video service start is initiated by a non real time marker. The method of claim 1, wherein the information about the AU number from the start of the stereoscopic video service for the program to the currently transmitted video image is an AU number of the 3D video image. The method of claim 1, wherein the stereoscopic service descriptor further includes image characteristic information indicating whether a transmitted image is a left image or a right image. The service method as claimed in claim 5, wherein the image characteristic information is described in the name of the content as identification information for distinguishing a case in which the transmitted image is a left image and a case in which the transmitted image is a right image. A non-real time stereoscopic video service method performed by a transmitting device,
Configuring a stereoscopic video service descriptor;
Constructing a program map table and a program related table; And
Transmitting a TS signal including the program map table and a program related table;
Configuring the stereoscopic video service descriptor,
Designating an initial timestamp value of a non-real time stereoscopic service corresponding to the stereoscopic video service descriptor; And
Configuring counting information of an access unit (AU) packet transmitted from a time point at which a non-real time stereoscopic service corresponding to the stereoscopic video service descriptor is started to the present;
The stereoscopic video service descriptor is included in the program map table. A non-real time stereoscopic video service method performed by a receiver,
Extracting and analyzing a program association table from the received TS;
Extracting and analyzing a program map table corresponding to a program selected by a user from the program association table;
Extracting and analyzing a stereoscopic video service descriptor from the program map table;
Generating frame and / or time information of an image to be reproduced by analyzing the stereoscopic video service descriptor; And
Reproducing an image in synchronization with a reference image and an additional image based on the generated frame and / or time information;
The generating of frame and / or time information of the image to be reproduced may include:
Determining whether time stamp information of the video to be reproduced is lost; And
If it is determined that the timestamp information is lost, the information of the timestamp of the start of the stereoscopic video service included in the stereoscopic video service descriptor and the access unit (AU) of the video image transmitted to the present time after the start of the stereoscopic video service And generating the frame and / or time information based on the number information. 9. The method of claim 8, wherein the stereoscopic service descriptor is included in a descriptor loop of a program map table. 9. The method of claim 8, wherein the start of the stereoscopic video service is initiated by a non real time marker. The method of claim 8, wherein the information about the AU number of the video image transmitted to the present time after the start of the stereoscopic video service for the program is the AU number of the 3D video image. The method of claim 8, wherein the stereoscopic service descriptor further includes image characteristic information indicating whether a transmitted image is a left image or a right image,
In the video reproducing step, the received video is reproduced as a left video or a right video according to the video characteristic information. The service method of claim 8, wherein when it is determined that time stamp information of the video to be reproduced is not lost, the reference video and the additional video are reproduced synchronously based on the time stamp. The method of claim 8, wherein the playing of the image comprises: obtaining an additional image corresponding to the generated frame and / or time information from the previously stored additional images and synchronizing with the reference image received in real time. Featured service method. A non-real time stereoscopic video service method performed by a receiver,
Extracting and analyzing a program association table from the received TS;
Extracting and analyzing a program map table corresponding to a program selected by a user from the program association table;
Extracting and analyzing a stereoscopic video service descriptor from the program map table;
Generating time information of an image to be reproduced by analyzing the stereoscopic video service descriptor; And
Reproducing an image in synchronization with a reference image and an additional image based on the generated frame and / or time information;
The generating of frame and / or time information of the image to be reproduced may include:
Determining whether time stamp information of the video to be reproduced is lost; And
If it is determined that the timestamp information is lost, from the stereoscopic video service start time information included in the stereoscopic video service descriptor, the video image transmitted until the present after the start of the stereoscopic video service included in the stereoscopic video service descriptor. Calculating a synchronization time by calculating the number of access unit (AU) counts. The service of claim 15, wherein the playing of the video comprises: obtaining an additional video corresponding to the calculated synchronization time from among previously stored additional videos, and reproducing the additional video in synchronization with a reference video received in real time. Way.

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