KR101191498B1 - System and Method for synchronization of 3D broadcasting service using real-time broadcasting and non-real time additional broadcasting data - Google Patents

Abstract

A method of generating a synchronization signal for a stereoscopic video broadcasting service by interworking real-time broadcasting and non-real-time additional broadcasting data, wherein the video source including at least one stereoscopic video broadcasting program including reference video data and additional video data is stored in a storage unit. Maintained; The frame information generator of the transmitting server generates N frame order information constituting the reference video data, information about a start frame of the N frames, and an identifier of the broadcast program data, and the frame information generator generates the N frames. Outputting sequence information, start frame information, and identifiers of broadcast program data to an encoder; Encoding, by the encoder, the broadcast data according to a preset encoding standard, and adding a PTS or a DTS to each frame according to a frame order of the broadcast data to a header of an encoded frame; The synchronization signal generator generates a start_PTS value, which is a PTS (Presentation Time Stamp) value or a start_DTS value, which is a Decoding Time Stamp (DTS) value, for the start frame of the encoded reference video data, and generates the start_PTS value or the start_DTS value and the broadcast program. Inserting an identifier of data into a PMT descriptor or a header of the encoded frame, and packing the encoded broadcast program data and the PMT descriptor to generate a TS; And transmitting, by the broadcast transmission device, the generated TS to a receiver through a first communication network, wherein the additional video data of the program data is for playing 3D video through a second communication network before real-time broadcasting of the broadcast program. To the receiver.

Description

System and method for synchronization of 3D broadcasting service using real-time broadcasting and non-real time additional broadcasting data}

The present invention relates to a stereoscopic image broadcasting service, and more particularly, to a method and system for generating a synchronization signal for providing a stereoscopic image broadcasting service through interworking of real-time broadcasting and additional broadcasting data.

In order to provide a 3D image service, a 2D reference image (eg, a left image) and additional information (eg, right image) required for the 3D image of the reference image are required. That is, the receiving terminal may generate the 3D image only when both the reference image and the additional information are present. In the conventional method of providing a 3D broadcast service, in transmitting a reference video and an additional video constituting a 3D video, the 3D broadcast service is simultaneously transmitted through a single broadcast network for the convenience of multiplexing, synchronization, and management.

However, when the left image and the right image constituting the 3D image received through the same network are separately received, information for synchronization of the respective images may not be included.

Therefore, when the left image and the right image are received separately, the two images cannot be synthesized unless there is a frame-based synchronization signal that can find the correct frame position on the display device receiving the image.

An object of the present invention is to provide a method and system for generating a synchronization signal capable of providing a stereoscopic image broadcasting service through interworking of real-time broadcasting and non-real-time additional broadcasting data.

In addition, the present invention is to separate and send the left image and the right image constituting the three-dimensional stereoscopic image, to reduce the transmission load when transmitting the three-dimensional stereoscopic image to the same network.

The present invention relates to a method for generating a synchronization signal for a stereoscopic video broadcasting service through interworking real-time broadcasting and non-real-time additional broadcasting data, wherein the video source includes at least one stereoscopic video broadcasting program including reference video data and additional video data. Held in storage; The frame information generator of the transmitting server generates N frame order information constituting the reference video data, information about a start frame of the N frames, and an identifier of the broadcast program data, and the frame information generator generates the N frames. Outputting sequence information, start frame information, and identifiers of broadcast program data to an encoder; Encoding, by the encoder, the broadcast data according to a preset encoding standard, and adding a PTS or a DTS to each frame according to a frame order of the broadcast data to a header of an encoded frame; The synchronization signal generator generates a start_PTS value, which is a PTS (Presentation Time Stamp) value or a start_DTS value which is a Decoding Time Stamp (DTS) value, for the start frame of the encoded reference video data, and generates the start_PTS value or the start_DTS and the broadcast program data. Inserting an identifier into a PMT descriptor or a header of the encoded frame, and packing the encoded broadcast program data and the PMT descriptor to generate a TS; And transmitting, by the broadcast transmitting device, the generated TS to a receiver through a first communication network, wherein the additional video data of the program data is for playing 3D video through a second communication network before real-time broadcasting of the broadcast program. To the receiver.

In addition, the synchronization signal generation method for the three-dimensional image broadcasting service through the interworking of the real-time broadcasting and non-real-time additional broadcast data is the reference image data provided to the frame information generation unit in the frame information generation unit for each frame order, start frame and Inserting program identifier information into metadata of the reference image data; Detecting, by the synchronization signal generation unit, information inserted into the metadata and inserting a start_PTS value or start_DTS and a program identifier of a currently input image into a PMT descriptor; Packing the PMT descriptor into which the start_PTS value or start_DTS and the program identifier are inserted; .

Inserting, by the frame information generator, frame order, start frame, and program identifier information of the reference image into audio or video data of the reference image data as a watermark or a Quick Response code; Detecting, by the synchronization signal generator, frame order, start frame, and program identifier information embedded in the watermark, and inserting a start_PTS value or start_DTS and a program identifier of the currently input image into the PMT descriptor; Packing the PMT descriptor in which the start_PTS value or the start_DTS and the program identifier are inserted.

The reference image data of the broadcast program data to be the selected real-time broadcasting target is transmitted to the encoder through SDI (Serial Digital Interface) or IP (Internet Protocol) communication.

 In addition, the present invention is a method of generating a synchronization signal for a stereoscopic image broadcasting service through the interworking of real-time broadcasting and non-real-time additional broadcasting data, comprising N frames including the reference image data and the additional image data constituting the stereoscopic image Maintaining a video source including at least one broadcast program data stored in TS units; Selecting broadcast program data to be a real-time broadcast target among the video sources, and depacking the selected broadcast program data; Reading a start frame PTS or DTS from the depacked TS data; Inserting a start_PTS value or a start_DTS value and a program identifier of an image into a PMT descriptor of a TS; Repacking a TS into which the start_PTS value or the start_DTS value and the program identifier of the video are inserted; And transmitting, by the broadcast transmission device, the repacked TS to a stereoscopic video broadcast receiver through a first communication network, wherein the additional video data of the broadcast program data is before a real-time broadcast of the reference video of the broadcast program data. It is provided in advance to a stereoscopic video broadcasting receiver through a communication network.

 In addition, the present invention provides a synchronization signal generation system for a stereoscopic video broadcasting service through the interworking of real-time broadcasting and non-real-time additional broadcasting data, N frame order information constituting the reference video data of the stereoscopic video broadcasting program, the N frames A transmission server generating information on a start frame among the frames and an identifier of the broadcast program data; An encoder for encoding the broadcast program data according to a preset encoding standard and adding a PTS or a DTS to a header of the encoded frame in each frame according to a frame order of the broadcast program data; A start_PTS value or start_DTS value, which is a Presentation Time Stamp (PTS) or Decoding Time Stamp (DTS) value for a start frame of the reference image data, is generated, and the start_PTS value or start_DTS value and an identifier of the broadcast program data are PMT descriptors. Or a synchronization signal generation unit inserted into a header of the encoded frame and packing the encoded broadcast program data and the PMT descriptor to generate a TS; And a broadcast transmitting device for transmitting the generated TS to a receiver through a first communication network.

The additional video data corresponding to the reference video of the stereoscopic video broadcasting program is provided to a receiver for stereoscopic video reproduction through a second communication network before real-time broadcasting of the broadcasting program.

The transmitting server includes a frame information generation unit for generating N frame order information constituting the reference video data, information on a start frame of the N frames, and an identifier of the broadcast program data. Each frame order, start frame, and program identifier information of the reference image are inserted into the metadata of the reference image data.

The transmitting server includes a frame information generation unit for generating N frame order information constituting the reference video data, information on a start frame of the N frames, and an identifier of the broadcast program data. The frame order, the start frame, and the program identifier information of the reference video are inserted into the audio or video data of the reference video data as a watermark or a QR code (Quick Response code).

The sync signal generator may include: a detector configured to detect the N frame order information, information on a start frame of the N frames, and an identifier of the broadcast program data; Inserting a start_PTS value or start_DTS value, which is a Presentation Time Stamp (PTS) or Decoding Time Stamp (DTS) value for the start frame of the reference video data, and an identifier of the broadcast program data into a PMT descriptor or a header of the encoded frame A synchronization signal inserting unit; And a TS packing unit for packing the encoded broadcast program data and the PMT descriptor.

In addition, the present invention is a synchronization signal generation system for a three-dimensional image broadcasting service through the interworking of real-time broadcasting and non-real-time additional broadcast data, stored in TS units including N frames constituting the reference image data of the three-dimensional image broadcasting program A dispatch server for depacking the broadcast program data and detecting a PTS or DTS value of a start frame; A synchronization signal generator for inserting a start_PTS or start_DTS value, which is a PTS (Decoding Time Stamp) or a Decoding Time Stamp (DTS) value, and a program identifier for the detected start frame into a PMT descriptor and repacking the TS; And a broadcast transmitting device for transmitting the repacked TS to a receiver through a first communication network.

The sync signal generator may include a detector configured to detect information about a start frame and a program data identifier from the depacked TS; A synchronization signal insertion unit for inserting start_PTS or start_DTS, which is a PTS or DTS value for the start frame, and an identifier of the broadcast program data into a PMT descriptor; And a TS packing unit for repacking the broadcast program data and the PMT descriptor.

As described above, the present invention separates the reference video and the additional video constituting the stereoscopic image and transmits them through different networks. There is an effect that can provide a high-quality three-dimensional image broadcasting service through the broadcasting network.

1 is a diagram illustrating a network providing a 3D stereoscopic broadcasting service according to an exemplary embodiment of the present invention.
2 is a detailed block diagram of a network providing a 3D stereoscopic broadcasting service according to an exemplary embodiment of the present invention.
3 is a block diagram of a transmitter for providing a 3D stereoscopic broadcast service according to an exemplary embodiment of the present invention.
4 is a block diagram of a receiver for providing a 3D stereoscopic broadcasting service according to an exemplary embodiment of the present invention.
5 is an exemplary diagram for describing an operation of synchronizing an image at a stereoscopic image data receiving end according to an exemplary embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a network providing a stereoscopic image broadcasting service according to an exemplary embodiment of the present invention.

The stereoscopic image broadcasting service system according to an exemplary embodiment of the present invention receives stereoscopic image broadcasting data through the stereoscopic image broadcasting transmitting apparatus 100 and the first communication network 200 and the second communication network 300 as shown in FIG. 1. It is configured to include a receiving device 400. The base image and the additional image constituting the stereoscopic image may be separately transmitted through the first communication network 200 and the second communication network 300. In an embodiment of the present invention, the first communication network may be a broadcast network. In addition to the Internet network, the second communication network may be a non-real time (NRT) or a communication network. The receiving side integrates them and synchronizes them to provide a stereoscopic image broadcasting service.

In the exemplary embodiment of the present invention, the reference image is described as the left image and the additional image as the right image, for example. Also, the reference image and the additional image transmitted separately are images having a constant disparity obtained from a 3D camera.

2 is a detailed block diagram of a network providing a 3D stereoscopic broadcasting service according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the stereoscopic image broadcasting data transmitting terminal 100 separately transmits a reference image and an additional image through the first communication network 200 and the second communication network 300. That is, any one of the reference video and the additional video is transmitted to and stored in the receiving terminal 400 through the second communication network 300, and the other is transmitted through the first communication network 200.

In this case, the reference image and the additional image may include various information in order to synchronize images received through different networks at different points in time at the receiving end 400.

That is, in order for the program XR image previously transmitted and stored to the receiver to be matched with the program XL image received to the receiver through the first communication network, synchronization information capable of matching the left and right images of the program X is provided. need. Therefore, the left image and the right image should include synchronization information. Here, the R image is used to refer to the right image data and the L image to refer to the left image data.

Description of information extraction and insertion for synchronizing the left image and the right image will be described in detail with reference to FIG. 3.

The program data output from the transmission server 110 for transmitting the reference video and the additional video and the information of the program data are output to the encoder 120.

In an exemplary embodiment of the present invention, an encoder for encoding a base view video and an additional view has been described as an MPEG encoder, for example. However, an MPEG encoder for encoding the base view video and the additional view may be provided.

The MPEG encoder 120 for encoding the reference video may encode a broadcast signal using the MPGE-2 codec.

In addition, video compression can be performed using the H.264 codec to encode additional video. An encoder using the H.264 codec compresses video that requires improved picture quality over the same bandwidth. Therefore, since the additional video is a non-real time video transmission, the H.264 codec is used to increase the compression rate and the high quality video can be transmitted rather than the encoding using the MPEG-2 codec for real time transmission as the reference video.

However, a codec used to encode an image constituting an actual stereoscopic image is not limited to the type and method disclosed in the embodiment of the present invention.

The broadcast program data encoded by the encoder 120 of the transmitter 100 is input to the synchronization signal generator 130. The reference image and the additional image including the synchronization information generated by the synchronization signal generation unit 130 are transmitted to the receiver 400 through the first communication network and the second communication network, respectively.

In this case, the synchronization information may include information indicating that the transmitted broadcast data is a 3D video broadcast service using real-time broadcast and non-real-time additional broadcast data.

The receiver 400 preferentially stores the additional image received through the second communication network and the additional information corresponding thereto in a storage unit. In this case, the additional video and the additional information received by the receiving terminal 400 through the second communication network may be referred to as "added broadcast data". When the reference image is received through the first communication network, the stereoscopic image is provided through the display unit by comparing the synchronization information of the received reference image with the synchronization information of the pre-stored additional image.

3 is a block diagram of a transmitter for providing a 3D stereoscopic broadcast service according to an exemplary embodiment of the present invention.

Referring to FIG. 3, an extraction and insertion operation of synchronization information added when an image is transmitted for a stereoscopic broadcast service in a transmission apparatus will be described in detail.

As described above, the transmitting end 100 may include a transmitting server 110, an encoder 120, a synchronization signal generating unit 130, and a transmitting device 150.

In the embodiment of the present invention, a description will be given of an operation of transmitting a reference video transmitted through a broadcasting network.

The transmission server 110 stores the left image data and the right image data acquired from the stereoscopic image camera in the storage 111.

Frame information generation unit for selecting the left image data which is the broadcast program data that is the target of the real-time broadcasting of the image data stored in the storage 111 to generate the synchronization information for synchronization with the right image transmitted through the second communication network Output to (112). The storage unit and the frame information generation unit 112 may transmit and receive data using SDI (Serial Digital Interface) or IP (Internet Protocol) communication.

The frame information generation unit 112 may insert synchronization information using frame-by-frame metadata, or insert information into video or audio using a watermark or a QR code.

The frame information generation unit 112 generates sequence information on N frames constituting broadcast program data, information on a start frame among the N frames, and an identifier (ID) of the broadcast program data to generate metadata or video / Insert into audio data.

In addition, the frame information generation unit 112 may generate stereoscopic image service information indicating that the broadcast program data is a stereoscopic image broadcasting service using real-time broadcasting and non-real-time additional broadcasting data. The generated stereoscopic image service information may be inserted into metadata or video / audio data together with the frame order information, start frame information, and program data identifier information.

The encoder 120 encodes the broadcast program data according to a preset encoding standard. The encoder 120 adds a PTS or a DTS to the header of the encoded frame in each frame according to the frame order of the broadcast program data.

The synchronization signal generator 130 may include a detector 131 and a program map table (PMT) descriptor for detecting information inserted into the video / audio data using metadata, a watermark, a QR code, or the like in the frame information generator. ) Is composed of a synchronization signal insertion unit 132 and a TS packing unit 133.

The information detector 131 detects the synchronization information generated by the frame information generator 112.

The synchronization signal inserting unit 132 inserts information indicating the progress from the starting point of the image that is the reference for frame-by-frame synchronization. The synchronization signal inserter 132 generates a start_PTS value or a start_DTS value, which is a PTS (Presentation Time Stamp) or a DTS (Decoding Time Stamp) value for a start frame of broadcast program data. In addition, the synchronization signal inserting unit 132 inserts the start_PTS value or the start_DTS value and the program data identifier and frame order information detected by the information detector 131 into the PMT descriptor or the header of the encoded frame. In this case, metadata may also be inserted in the header of the PMT descriptor or the encoded frame.

The TS packing unit 133 generates a transport stream (TS) by packetizing the encoded broadcast program data and the PMT descriptor.

The transmitting device 150 transmits the TS generated by the TS packing unit 133 through the first communication network.

As described above, when transmitting the reference image through the first communication network, the transmitting terminal 100 transmits the information including the information for synchronization with the additional video stored in the receiving terminal.

As described above, the synchronization information included in the reference image may include synchronization information by using frame-based metadata or insert synchronization information into a video or audio by using a watermark or a QR code. can do.

First, a case of inserting synchronization information into metadata on a frame basis will be described.

The metadata is data including additional information about broadcast data. That is, it is additional information that can describe broadcast data such as creation date and time of broadcast data and producer information reproduction time information.

Therefore, the transmission server 110 outputs the reference image obtained from the stereoscopic image photographing apparatus to the frame information generation unit 112 through a transmission protocol such as SDI or IP. The frame information generator 112 inserts the frame order information 11 of the broadcast program data, the start frame information 12 indicating the start of the program among the frames, and the identifier 13 of the corresponding program into the metadata.

The broadcast program data information inserted into the metadata is output to the synchronization signal generator 130. The synchronization signal generator 130 detects the information included in the embedded metadata and inserts the PTS value or the DTS value and the program identifier of the start point of the currently input image into the PMT descriptor.

Thereafter, the TS packing unit packetizes the encoded broadcast program data and the PMT descriptor to generate a TS and transmit the TS to the receiver through the transmitter 150.

Secondly, a case in which synchronization information is inserted into a video or audio using a watermark or a Quick Response Code is described.

The transmission server 110 outputs the reference image obtained from the 3D image photographing apparatus to the frame information generator 112 through a communication protocol such as SDI or IP.

The frame information generation unit inserts information such as the order of each frame, the start frame, the program identifier, and the like into the video or audio of the reference video through a watermark or a QR code and outputs the same to the encoder.

The synchronization signal generator 130 detects the information inserted into the video / audio using a watermark or QR code, inserts the starting point PTS value or DTS value and the program identifier of the currently input image into the PMT descriptor, and performs TS packing. .

At this time, the encoder inserts into the descriptor a flag indicating what information is inserted in the watermark or QR code. The flag inserted in the descriptor is for the receiver 400 to detect the watermark or the QR code, etc., so as to restore the order, start frame, and program identifier information of each frame.

Third, as described above, there is a method of inserting synchronization information into a reference image when encoding is not required, in addition to a method of inserting synchronization information using metadata or a watermark on a frame basis of a reference image.

If broadcast program data exists in a TS file state, no separate encoding is required. Therefore, the sending server 110 detects the PTS value or the DTS value of the start frame by depacking the TS file. Thereafter, the synchronization signal generator inserts the starting point PTS value or DTS value of the video and the program identifier into the descriptor of the TS to repack the depacked TS and transmits the depacked TS to the receiver through the transmitter 150. .

4 is a block diagram of a receiver for providing a 3D stereoscopic broadcasting service according to an exemplary embodiment of the present invention.

The receiver 400 includes a first communication network image receiving unit 410, a second communication network image receiving unit 420, a storage unit 430, a 3D stereoscopic image processing unit 440, and a display unit 450.

The first communication network image receiving unit 410 is a broadcasting network and receives a left image that is a reference image according to an embodiment of the present invention.

The second communication network image receiving unit 420 receives the right image, which is an additional image, according to an embodiment of the present invention as an internet network, an NRT, a communication network, or the like.

The storage unit 430 stores the additional image previously received through the second communication network image receiving unit 420 before the reference image is received through the first communication network. When the TS-encoded real-time broadcast program data is received through the first communication network image receiver 410, the storage unit 430 reads out the broadcast program data and outputs the same to the 3D stereoscopic image processor 440.

The 3D stereoscopic image processor 440 synchronizes the reference image and the additional image stored in the first communication network image receiver 410 and the storage 430 with reference to the synchronization information. The reference video encoded with TS and including synchronization information checks the PTS value or the DTS value of the current frame.

The descriptor in the PMT is checked to read start_PTS or start_DTS representing the first frame of the left image data, and the PTS value or DTS value of the current frame is compared with the start_PTS value or start_DTS value.

The frame determines whether the current frame is the frame of the broadcast program data, and synchronizes a corresponding frame of the right image data corresponding to the current frame.

5 illustrates an example of synchronizing an image at a receiving end of a broadcasting system according to an exemplary embodiment of the present invention.

Referring to FIG. 5, for example, when a channel is changed after about 100 frames have passed since the start of broadcasting, the PTS of the current frame has an X + 100 value. Therefore, the progress of the video frame can be known as compared with start_PTS in the descriptor in the PMT.

Accordingly, a frame having frame order information equal to the elapsed frame may be searched and synchronized with respect to a corresponding frame of the additional image previously received and stored through the second communication network.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those of ordinary skill 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. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the equivalents of the claims, as well as the claims.

Claims (12)

A method of generating a synchronization signal for a stereoscopic image broadcasting service by interworking real time broadcasting with non-real time additional broadcasting data,
Maintaining a video source including at least one stereoscopic image broadcasting program including reference image data and additional image data in a storage unit;
The frame information generator of the transmitting server generates N frame order information constituting the reference video data, information about a start frame of the N frames, and an identifier of the broadcast program data, and the frame information generator generates the N frames. Outputting sequence information, start frame information, and identifiers of broadcast program data to an encoder;
The encoder encoding the broadcast program data according to a preset encoding standard and adding a PTS or a DTS to a header of an encoded frame according to a frame order of the broadcast data;
The sync signal generator generates a start_PTS value or a start_DTS value, which is a PTS (Presentation Time Stamp) or DTS (Decoding Time Stamp) value for the start frame of the encoded reference image data, and generates the start_PTS value or the start_DTS value and the broadcast program. Inserting an identifier of data into a PMT descriptor or a header of the encoded frame, and packing the encoded broadcast program data and the PMT descriptor to generate a TS;
And transmitting, by the broadcast transmitting device, the generated TS to a receiver through a first communication network, wherein the additional video data of the program data is for playing 3D video through a second communication network before real-time broadcasting of the broadcast program. Provided by the receiver
Synchronization signal generation method for stereoscopic image broadcasting service through real-time broadcasting and non-real-time additional broadcasting data. The method of claim 1,
The reference image data provided to the frame information generator is
Inserting, by the frame information generator, frame information, start frame, and program identifier information of the reference image into metadata of the reference image data;
Detecting, by the synchronization signal generation unit, information inserted into the metadata and inserting a start_PTS value or a start_DTS value and a program identifier of a currently input image into a PMT descriptor or a header of the encoded frame;
Packing the PMT descriptor into which the start_PTS value or the start_DTS value and a program identifier are inserted;
Method of generating a synchronization signal for a three-dimensional image broadcasting service through the interworking of real-time broadcasting and non-real-time additional broadcast data comprising a. The method of claim 1,
Inserting, by the frame information generator, frame order, start frame, and program identifier information of the reference image into audio or video data of the reference image data as a watermark or a Quick Response code;
The sync signal generator detects the frame order, start frame, and program identifier information embedded in the watermark or QR code, and stores the start_PTS value or start_DTS value and program identifier of the currently input image in the PMT descriptor or the header of the encoded frame. Inserting;
Packing the PMT descriptor into which the start_PTS value or the start_DTS value and a program identifier are inserted;
Method of generating a synchronization signal for a stereoscopic image broadcasting service through the interworking of real-time broadcasting and non-real-time additional broadcast data further comprising. The method of claim 1,
The reference image data is transmitted and received through SDI (Serial Digital Interface) or IP (Internet Protocol) communication.
Method of generating a synchronization signal for a stereoscopic video broadcasting service through the interworking of real-time broadcasting and non-real-time additional broadcasting data. A method of generating a synchronization signal for a stereoscopic image broadcasting service by interworking real time broadcasting with non-real time additional broadcasting data,
Maintaining a video source including N frames including reference video data and additional video data constituting a stereoscopic image, the video source including at least one broadcast program data stored in TS units;
Selecting broadcast program data to be a real-time broadcast target among the video sources, and depacking the selected broadcast program data;
Reading a start frame PTS or DTS from the depacked TS data;
Inserting a start_PTS value or a start_DTS value of a video and a program identifier into a PMT descriptor of a TS or a header of an encoded frame;
Repacking a TS into which the start_PTS value or the start_DTS value and the program identifier of the video are inserted;
Transmitting, by a broadcast transmitting device, the repacked TS to a stereoscopic video broadcasting receiver through a first communication network;
The additional video data of the broadcast program data is previously provided to the stereoscopic video broadcast receiver through a second communication network before real-time broadcast of the reference video of the broadcast program data.
Method of generating a synchronization signal for a stereoscopic video broadcasting service through the interworking of real-time broadcasting and non-real-time additional broadcasting data. A synchronization signal generation system for a stereoscopic video broadcasting service through interworking real-time broadcasting and non-real-time additional broadcasting data,
A transmission server for generating N frame order information constituting reference video data of a stereoscopic video broadcast program, information on a start frame of the N frames, and an identifier of the broadcast program data;
An encoder that encodes the broadcast program data according to a preset encoding standard and adds a PTS to each header of the encoded frame according to a frame order of the broadcast program data;
A start_PTS value or start_DTS value, which is a Presentation Time Stamp (PTS) or Decoding Time Stamp (DTS) value for the start frame of the reference image data, is generated, and the start_PTS value or start_DTS value and the identifier of the broadcast program data are PMT descriptors. Or a synchronization signal generation unit inserted into a header of the encoded frame and packing the encoded broadcast program data and the PMT descriptor to generate a TS; And
And a broadcast transmitting device for transmitting the generated TS to a receiver through a first communication network.
Synchronization signal generation system for 3D broadcasting service. The method of claim 6,
The additional video data corresponding to the reference video of the stereoscopic video broadcasting program is provided to a receiver for stereoscopic video reproduction through a second communication network prior to the real-time broadcasting of the broadcasting program.
Synchronization signal generation system for 3D broadcasting service. The method of claim 7, wherein
The transmitting server includes a frame information generation unit for generating N frame order information constituting the reference video data, information on a start frame of the N frames, and an identifier of the broadcast program data.
The frame information generation unit inserts each frame order, start frame, and program identifier information of the reference image into metadata of the reference image data.
Synchronization signal generation system for 3D broadcasting service. The method of claim 7, wherein
The transmitting server includes a frame information generation unit for generating N frame order information constituting the reference video data, information on a start frame of the N frames, and an identifier of the broadcast program data.
The frame information generation unit inserts the frame order, the start frame and the program identifier information of the reference image into audio or video data of the reference image data as a watermark or a QR code (Quick Response code).
Synchronization signal generation system for 3D broadcasting service. The method of claim 7, wherein
The sync signal generator,
A detector for detecting the N frame order information, information on a start frame of the N frames, and an identifier of the broadcast program data;
Inserting a start_PTS value which is a Presentation Time Stamp (PTS) value or a Start_DTS value which is a Decoding Time Stamp (DTS) value and an identifier of the broadcast program data into a PMT descriptor or a header of the encoded frame A synchronization signal inserting unit; And
A TS packing unit for packing the encoded broadcast program data and the PMT descriptor,
Synchronization signal generation system for 3D broadcasting service. A synchronization signal generation system for a stereoscopic video broadcasting service through interworking real-time broadcasting and non-real-time additional broadcasting data,
A delivery server for depacking broadcast program data stored in TS units including N frames constituting reference video data of a stereoscopic video broadcast program and detecting a PTS or DTS value of a start frame;
A synchronization signal generator for inserting a start_PTS or start_DTS value, which is a PTS (Decoding Time Stamp) or a Decoding Time Stamp (DTS) value, and a program identifier for the detected start frame into a PMT descriptor and repacking the TS; And
And a broadcast transmitting device for transmitting the repacked TS to a receiver through a first communication network.
Synchronization signal generation system for 3D broadcasting service. The method of claim 11,
The sync signal generator
A detector for detecting information about a start frame and a program data identifier from the depacked TS;
A synchronization signal insertion unit for inserting start_PTS or start_DTS, which is a PTS or DTS value for the start frame, and an identifier of the broadcast program data into a PMT descriptor; And
And a TS packing unit for repacking the broadcast program data and the PMT descriptor.
Synchronization signal generation system for 3D broadcasting service.

Images