WO2013058455A1 - Appareil et procédé pour ajouter des informations de synchronisation à un espace de données auxiliaire dans un signal vidéo et synchroniser une vidéo - Google Patents

Appareil et procédé pour ajouter des informations de synchronisation à un espace de données auxiliaire dans un signal vidéo et synchroniser une vidéo Download PDF

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Publication number
WO2013058455A1
WO2013058455A1 PCT/KR2012/003837 KR2012003837W WO2013058455A1 WO 2013058455 A1 WO2013058455 A1 WO 2013058455A1 KR 2012003837 W KR2012003837 W KR 2012003837W WO 2013058455 A1 WO2013058455 A1 WO 2013058455A1
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Prior art keywords
synchronization information
video signal
encoding
bitstream
information
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PCT/KR2012/003837
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English (en)
Korean (ko)
Inventor
조숙희
정세윤
김종호
김성훈
최진수
김진웅
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한국전자통신연구원
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Priority claimed from KR1020120044609A external-priority patent/KR101853504B1/ko
Application filed by 한국전자통신연구원 filed Critical 한국전자통신연구원
Priority to US14/352,892 priority Critical patent/US9723259B2/en
Publication of WO2013058455A1 publication Critical patent/WO2013058455A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/10—Processing, recording or transmission of stereoscopic or multi-view image signals
    • H04N13/106—Processing image signals
    • H04N13/167—Synchronising or controlling image signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/10—Processing, recording or transmission of stereoscopic or multi-view image signals
    • H04N13/106—Processing image signals
    • H04N13/172—Processing image signals image signals comprising non-image signal components, e.g. headers or format information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
    • H04N13/10—Processing, recording or transmission of stereoscopic or multi-view image signals
    • H04N13/194—Transmission of image signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
    • H04N21/4345—Extraction or processing of SI, e.g. extracting service information from an MPEG stream
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/81—Monomedia components thereof
    • H04N21/8146—Monomedia components thereof involving graphical data, e.g. 3D object, 2D graphics
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/85—Assembly of content; Generation of multimedia applications
    • H04N21/854—Content authoring
    • H04N21/8547—Content authoring involving timestamps for synchronizing content

Definitions

  • the present invention relates to an apparatus and a method for synchronizing an image by adding synchronization information to an auxiliary data space of a video signal, and more specifically, by adding synchronization information to an auxiliary data space included in the video signal.
  • the present invention relates to an apparatus and method for adding synchronization information for transmitting a signal or for synchronizing images corresponding to a video signal without a separate synchronization process.
  • Images related to each other are stored, encoded, and decoded, such as a 3D image, a free view image, a multiview image, and an ultra high resolution image corresponding to 4 to 16 times HD, divided into HD, etc.
  • Images should be synchronized frame by frame. Therefore, when acquiring a plurality of images related to each other, by connecting a synchronization signal output from a separate synchronization signal generator to the equipment associated with the image, by synchronizing the synchronization signal of each device, the image output from each device is synchronized Genlock technology is used.
  • the present invention provides an apparatus and method for transmitting a separate sync signal or for allowing a decoding apparatus to synchronize images corresponding to a video signal without a separate synchronization process.
  • the present invention also provides an apparatus and method capable of synchronizing and reproducing a plurality of bitstreams by a terminal receiving the bitstreams without synchronizing and multiplexing bitstreams.
  • the present invention also provides an apparatus and method capable of synchronizing without simultaneously receiving the bitstreams to be synchronized.
  • Synchronization information adding apparatus includes a synchronization information generating unit for generating synchronization information; And a synchronization information adding unit for adding synchronization information to the auxiliary data space of the video signal.
  • An encoding system includes a synchronization information adding device for adding synchronization information to an auxiliary data space of a video signal; And an encoding device for encoding the video signal to which the synchronization information is added to generate a bitstream to which the synchronization information is added.
  • An encoding apparatus of an encoding system may identify synchronization information in an auxiliary data space of a video signal and add the identified synchronization information to a user data syntax among syntaxes of a bitstream.
  • the encoding system may further include a multiplexing device for synchronizing a plurality of bitstreams based on the synchronization information included in the bitstream and multiplexing the synchronized bitstreams.
  • the multiplexing apparatus of the encoding system may determine the interval for checking the synchronization information according to the user data syntax to which the synchronization information is added, and check the synchronization information at each determined interval to synchronize the plurality of bitstreams. have.
  • An encoding system includes a caption information adding apparatus for adding caption information including synchronization information to an auxiliary data space of a video signal; An encoding device for encoding a video signal added with caption information to generate a bitstream; And a multiplexing apparatus for synchronizing and multiplexing the plurality of bitstreams based on the synchronization information included in the subtitle information of the bitstream.
  • the encoding apparatus of the encoding system may identify sync information included in the caption information and add the identified sync information to a syntax related to the caption data in the bitstream.
  • Synchronization information addition method comprises the steps of generating the synchronization information; And adding synchronization information to the auxiliary data space of the video signal.
  • An encoding method includes adding synchronization information to an auxiliary data space of a video signal; And encoding the video signal to which the synchronization information is added to generate a bitstream to which the synchronization information is added.
  • An encoding method includes adding caption information including synchronization information to an auxiliary data space of a video signal; Generating a bitstream by encoding a video signal to which subtitle information is added; And synchronizing and multiplexing the plurality of bitstreams based on the synchronization information included in the subtitle information of the bitstream.
  • a separate synchronization signal is transmitted or the decoding apparatus synchronizes images corresponding to the video signal without a separate synchronization process. can do.
  • the plurality of terminal in the bitstream received can be synchronized and played back.
  • the bit stream to be synchronized is searched and synchronized with the synchronization information included in the bit stream, the bit stream to be synchronized is searched among the first received bit streams without receiving the bit streams to be synchronized at the same time. Can be synchronized.
  • FIG. 1 is a diagram illustrating a relationship between a device for adding synchronization information and another device according to an embodiment of the present invention.
  • FIG. 2 is a block diagram illustrating an apparatus for adding synchronization information according to an embodiment of the present invention.
  • 3 is an example of an auxiliary data space to which synchronization information adding device according to an embodiment of the present invention adds synchronization information.
  • FIG. 4 is an example of a system for encoding a video signal generated according to an embodiment of the present invention.
  • 5 is an example of an encoding system including an apparatus for adding synchronization information according to an embodiment of the present invention.
  • 6 is an example of the most significant syntax of a bitstream generated by an encoding apparatus according to an embodiment of the present invention.
  • FIG. 7 is an example of a syntax capable of inserting auxiliary information in a bitstream generated by an encoding apparatus according to an embodiment of the present invention.
  • 8 is an example of user data syntax related to subtitles in a bitstream generated by an encoding apparatus according to an embodiment of the present invention.
  • FIG. 9 is an example of a binocular 3DTV transmission system including an apparatus for adding synchronization information according to an embodiment of the present invention.
  • FIG. 10 is a flowchart illustrating a method of adding synchronization information according to an embodiment of the present invention.
  • the synchronization information adding method according to an embodiment of the present invention may be performed by the synchronization information adding apparatus.
  • FIG. 1 is a diagram illustrating an image acquisition system including an apparatus for adding synchronization information according to an embodiment of the present invention.
  • the image acquisition system includes a synchronization information adding apparatus 100, a left camera 110, a left image recording medium 115, a right camera 120, and a right image recording medium. 125, and a signal generator 130.
  • the left camera 110 may capture a left image of a photographing target to generate a first video signal which is a video signal of the left image, and transmit the generated first video signal to the synchronization information adding apparatus 100.
  • the right camera 120 may capture a right image of a photographing target to generate a second video signal that is a video signal of the right image, and transmit the generated second video signal to the synchronization information adding apparatus 100.
  • the left camera 120 and the right camera 120 are genlocked by the signal generator 130, and the first camera signal and the second video signal are generated according to the synchronization signal of the signal generator 130. Can transmit at the same time.
  • the apparatus 100 for adding synchronization information may generate synchronization information and add synchronization information to the auxiliary data space of the first video signal and the auxiliary data spaces of the second video signal.
  • the synchronization information may be information necessary for synchronizing the left image and the right image, such as a time code.
  • the auxiliary data space may be one of a vertical data space (VANC) or a data space transmitted in a vertical blanking interval (VBI) located between video frames of a video signal.
  • VANC vertical data space
  • VBI vertical blanking interval
  • the apparatus 100 for adding synchronization information may transmit and store the first video signal and the second video signal including the synchronization information to the left image recording medium 115 and the right image recording medium 125, respectively.
  • the apparatus 100 for adding synchronization information generates synchronization information with a predetermined number or more bits such as a time code including time, minute, and second data, such that the same synchronization signal overlaps in one video content or a connected video sequence. Can be prevented from being added.
  • the apparatus 100 for adding synchronization information generates and adds synchronization information to an auxiliary data space of a plurality of video signals in all interface standards related to broadcast and video as well as 3D video video signals. Can be made available when needed.
  • the plurality of video signals to which the synchronization information adding apparatus 100 adds synchronization information are videos of images that need to be synchronized with each other, such as divided images of 3D image, free view image, multiview image, and ultra high resolution image. May be signals.
  • the apparatus 100 for adding synchronization information adds synchronization information to an auxiliary data space included in the video signal so as to transmit a separate synchronization signal or the decoding apparatus to the video signal without a separate synchronization process.
  • Corresponding images may be synchronized.
  • FIG. 2 is a block diagram illustrating an apparatus 100 for adding synchronization information according to an embodiment of the present invention.
  • the apparatus 100 for adding synchronization information may include a synchronization information generating unit 210 and a synchronization information adding unit 220.
  • the synchronization information generator 210 may generate synchronization information including a time code based on a reception time of a video signal or a reproduction time of a video frame.
  • the synchronization information generation unit 210 generates the synchronization information using a predetermined number or more bits, such as a time code including time, minute, and second data, such that the same synchronization signal is overlapped in one video content or a connected video sequence. Can be prevented from being added.
  • the sync information adder 220 may add sync information generated by the sync information generator 210 to the auxiliary data space of the video signal.
  • the synchronization information adding unit 220 transmits data in a vertical data space (VANC) or a vertical blanking interval (VBI) and video in NTSC, SD-SDI, and HD-SDI standards.
  • VANC vertical data space
  • VBI vertical blanking interval
  • One of the auxiliary data spaces positioned between the video frames of the signal may be determined as an auxiliary data space, and synchronization information may be added to the data space determined as the auxiliary data space.
  • 3 is an example of an auxiliary data space to which synchronization information adding device according to an embodiment of the present invention adds synchronization information.
  • the video display device After displaying one screen, the video display device needs time to reset or set the video display function in order to display the next screen. In this case, since the image display apparatus cannot use the image display function, the data received at this point is not displayed on the screen.
  • the video signal 300 of the image is not displayed on the screen between the video frame 310 for displaying one screen and the video frame 320 for displaying the next screen as shown in FIG. 3.
  • the apparatus 100 for adding synchronization information adds synchronization information to the auxiliary data space 330 included in the video signal 300, thereby providing a video signal without additional synchronization signal or additional information transmission. You can send information to synchronize.
  • FIG. 4 is an example of a system for encoding a video signal generated according to an embodiment of the present invention.
  • the encoding device 410 receives a first video signal to which synchronization information is added from the left image recording medium 115, and receives a second video signal to which synchronization information is added from the right image recording medium 125, on a frame-by-frame basis. Can be encoded.
  • the encoding apparatus 410 may identify synchronization information in the auxiliary data space of the video signal, and may divide the video signal into frame units.
  • the encoding device 410 may generate a bitstream by encoding the video signal divided by the frame unit together with the synchronization information corresponding to the frame.
  • the encoding apparatus 410 may store synchronization information in an elementary stream (ES) of the bitstream.
  • the encoding apparatus 410 may further define flag information indicating whether synchronization information is present in a TS (transport stream) syntax, so that the multiplexing apparatus 420 may easily identify the presence of synchronization information.
  • next-generation digital broadcasting such as 3DTV, free-view broadcasting, multi-view broadcasting and ultra-high definition TV must be compatible with existing DTV broadcasting.
  • the encoding apparatus 410 may maintain compatibility with the existing DTV broadcast only when a bitstream of at least one video signal of the plurality of video signals is generated according to the ATSC digital broadcast standard used in the existing DTV.
  • a method in which the encoding device 410 adds synchronization information to a bitstream according to the ATSC digital broadcasting standard will be described in detail with reference to FIGS. 6 to 8.
  • the encoding device 410 may transmit the generated bitstream to the multiplexing device 420.
  • the encoding device 410 generates a bitstream by encoding synchronization information included in a video signal together with a video signal, thereby receiving the bitstream without synchronizing and multiplexing the bitstreams with the multiplexing device 420.
  • the plurality of bitstreams can be synchronized and played back. For example, even if the left video signal and the right video signal are separately transmitted without being multiplexed, such as non-real time (NRT) 3D broadcasting, the terminal receiving the signal uses the synchronization information included in the signals to compare with the left video signal. The right video signal can be synchronized and played back.
  • NRT non-real time
  • the multiplexing device 420 may synchronize and multiplex the plurality of bitstreams based on the synchronization information included in the bitstream received from the encoding device 410.
  • the multiplexing apparatus 420 may identify the synchronization information of each frame by analyzing the syntax of the ES of the bitstream received from the encoding apparatus 410.
  • the multiplexing device 420 may search for a frame of another bitstream having the same sync information as the identified sync information.
  • the multiplexing apparatus 420 may synchronize a frame of the retrieved bitstream and a frame of the received bitstream according to the synchronization information.
  • the multiplexing device 420 may multiplex and output the synchronized bitstreams.
  • the conventional multiplexer 420 Since the conventional multiplexer 420 must simultaneously receive the bitstreams to be synchronized and multiplexed, as many encoding devices as the number of bitstreams to be multiplexed are necessary. For example, in order to multiplex the bitstreams encoding the left and right images as shown in FIG. 4, the left and right images are simultaneously encoded using two encoding apparatuses, and the bitstream and the right side of the left image are encoded from the two encoding apparatuses. It was necessary to simultaneously receive and multiplex a video bitstream.
  • the multiplexing apparatus 420 since the multiplexing apparatus 420 according to the present invention searches and synchronizes the bitstreams to be synchronized with the synchronization information included in the bitstream, the multiplexing apparatus 420 has the same synchronization information among the first received bitstreams without having to simultaneously receive the bitstreams to be synchronized. Bitstreams can be searched and multiplexed. Accordingly, the multiplexing device 420 according to the present invention may synchronize and multiplex a plurality of bitstreams regardless of the number of encoding devices.
  • the multiplexing apparatus 420 generates a plurality of bitstreams by sequentially encoding a plurality of video signals with one encoding apparatus 410 as shown in FIG. 4, and encoding apparatus 410. After the encoding of all images is completed, the plurality of stored bitstreams may be synchronized using synchronization information included in the stored plurality of bitstreams.
  • the decoding apparatus may decode the received bitstream and synchronize the decoded bitstream by the same method as the multiplexing apparatus 420.
  • the decoding apparatus may identify the synchronization information of each frame by analyzing the syntax of the ES of the decoded bitstream.
  • the decoding apparatus may search for a frame of another bitstream having the same sync information as the identified sync information.
  • the decoding apparatus may synchronize the frame of the retrieved bitstream with the frame of the received bitstream according to the synchronization information.
  • 5 is an example of an encoding system including an apparatus for adding synchronization information according to an embodiment of the present invention.
  • 5 is an example of an encoding system that directly encodes a video signal obtained through a camera without storing the image signal in an image storage medium.
  • the encoding system includes the synchronization information adding apparatus 100, the left camera 110, the right camera 120, the signal generator 130, and the first encoding device 510. ), A second encoding device 520, and a multiplexing device 530.
  • the left camera 110, the right camera 120, and the signal generator 130 perform the same operations as those of FIG. 1, a detailed description thereof will be omitted.
  • the synchronization information adding apparatus 100 may generate synchronization information, add synchronization information to the auxiliary data space of the first video signal received from the left camera 110, and transmit the synchronization information to the first encoding apparatus 510.
  • the synchronization information adding apparatus 100 may add synchronization information to the auxiliary data spaces of the second video signal received from the right camera 120 and transmit the synchronization information to the second encoding apparatus 520.
  • the first encoding apparatus 510 may generate a first bitstream by encoding the first video signal received from the synchronization information adding apparatus 100 in units of frames. In this case, the first encoding apparatus 510 may identify synchronization information in the auxiliary data space of the first video signal and add the identified synchronization information to the user data syntax among the syntaxes of the first bitstream. In addition, the first encoding apparatus 510 may transmit the first bitstream to which the synchronization information is added, to the multiplexing apparatus 530.
  • the second encoding apparatus 520 may generate a second bitstream by encoding the second video signal received from the synchronization information adding apparatus 100 in units of frames.
  • the second encoding apparatus 520 may identify synchronization information in the auxiliary data space of the second video signal, and add the identified synchronization information to the user data syntax among the syntaxes of the second bitstream.
  • the second encoding device 510 may transmit the second bitstream to which the synchronization information is added, to the multiplexing device 530.
  • the multiplexing apparatus 530 may synchronize and multiplex a frame to which the same synchronization information is added in the first bitstream and the second bitstream based on the synchronization information included in the first bitstream and the second bitstream.
  • 6 is an example of the most significant syntax of a bitstream generated by an encoding apparatus according to an embodiment of the present invention.
  • the ATSC digital broadcasting standard encodes a video signal using the MPEG-2 video coding standard.
  • the video sequence () syntax which is the highest syntax of the MPEG-2 bitstream generated by the encoding apparatus 410 according to the ATSC digital broadcasting standard, may use the extension_and_user_data (2) syntax (610) as shown in FIG. It may include.
  • the encoding apparatus 410 may include the extension_and_user_data (1) syntax in the video sequence () syntax instead of the extension_and_user_data (2) syntax 610.
  • the extension_and_user_data (1) syntax is a syntax for inserting auxiliary information in a group of pictures (GOP) unit
  • the extension_and_user_data (2) syntax is a syntax for inserting auxiliary information in a picture unit in an encoded bitstream.
  • the GOP unit may be an independent coding unit that is composed of a plurality of encoded pictures and may be randomly accessed
  • the picture may be an image in which each video frame is encoded.
  • the plurality of frames corresponding to the GOP unit may be frames from one key frame to the next key frame.
  • the extension_and_user_data (1) syntax or the extension_and_user_data (2) syntax may include a user_data () syntax 710 as shown in FIG. 7. In this case, i may be either 1 or 2 in FIG. 7.
  • the encoding apparatus 410 may store synchronization information in the user_data () syntax 710 included in the extension_and_user_data (1) syntax or the extension_and_user_data (2) syntax.
  • the encoding apparatus 410 may use the SMPTE 334-2: Caption Distribution packet definition standard. Based on the time code syntax, synchronization information may be stored in the user_data () statement 710 in the form shown in Table 1.
  • Synchronization information stored in the user_data () syntax 710 may be synchronized.
  • the multiplexing apparatus 420 may determine an interval for checking the synchronization information according to the user data syntax to which the synchronization information is added, and synchronize the plurality of bitstreams by checking the synchronization information at each determined interval. For example, when the synchronization information is stored in the user_data () syntax 710 of the extension_and_user_data (1) syntax, the multiplexing apparatus 420 may perform the multiplexing by checking the synchronization information for each GOP unit. In addition, when the synchronization information is stored in the user_data () syntax 710 of the extension_and_user_data (2) syntax, the multiplexing apparatus 420 may perform the multiplexing by checking the synchronization information for each picture unit.
  • extension_and_user_data (1) syntax or the extension_and_user_data (2) syntax is a syntax for storing auxiliary information, not image information. Accordingly, even if the decoding device that receives and decodes the signal output by the multiplexing device 420 cannot interpret the synchronization information stored in the extension_and_user_data (1) syntax or the user_data () syntax 710 of the extension_and_user_data (2) syntax, the image information may not be interpreted.
  • the syntax of encoding may be decoded to reconstruct an image.
  • the image of the coded signal according to the present invention can be reconstructed, so that the encoding system according to the present invention is compatible with the conventional decoding apparatus.
  • 8 is an example of user data syntax related to subtitles in a bitstream generated by an encoding apparatus according to an embodiment of the present invention.
  • the ATSC digital broadcasting standard defines a picture user data syntax indicating closed caption data or bar data in the user_data () syntax of the MPEG-2 video encoding bitstream.
  • the encoding apparatus 410 transmits this synchronization information through the ATSC digital broadcasting standard by adding the time code () syntax 810 as shown in Table 1 to the picture user data syntax of the user_data () syntax 710. It becomes possible.
  • the syntax 820 related to user_data_type_code is one of ATSC_reserved_user_data, and may be a condition syntax for identifying the time code () syntax 810.
  • FIG 9 is an example of a binocular 3DTV transmission system including an apparatus for adding caption information according to an embodiment of the present invention.
  • FIG. 9 is an embodiment in which a synchronization information addition function according to an embodiment of the present invention is added to an apparatus for adding caption information of a binocular 3DTV transmission system based on a conventional MPEG-2 encoding apparatus and a heterogeneous codec encoding apparatus.
  • a synchronization information addition function according to an embodiment of the present invention is added to an apparatus for adding caption information of a binocular 3DTV transmission system based on a conventional MPEG-2 encoding apparatus and a heterogeneous codec encoding apparatus.
  • the left camera 110, the right camera 120, and the signal generator 130 perform the same operations as those of FIG. 1, a detailed description thereof will be omitted.
  • the caption information adding apparatus 900 generates caption information related to the synchronization information and the images captured by the left camera 110 and the right camera 120, and stores the auxiliary data space of the first video signal and the auxiliary data of the second video signal. Subtitle information including synchronization information may be added to the spaces.
  • the caption information adding apparatus 900 uses closed caption information using SMPTE 333M or SMPTE 334M, which are standards for EIA-608 (analog and SD-SDI closed captioning) and EIA-708 (HD-SDI closed captioning). ) Can be created.
  • the MPEG-2 encoding apparatus 910 may encode caption information together with a video signal and output the encoded subtitle information to the MPEG-2 TS.
  • the MPEG-2 encoding apparatus 910 cannot generate the bitstream by inserting synchronization information into user_data () in extension_and_user_data (1) or extension_and_user_data (2). Accordingly, the MPEG-2 encoding apparatus 910 may store synchronization information by adding a time code () syntax 810 to a cc_data () syntax indicating a location of a caption broadcasting information pair.
  • the video encoding apparatus 920 may encode caption information together with a video signal and output the MPEG-2 TS like the MPEG-2 encoding apparatus 910.
  • the video encoding apparatus 920 may store the synchronization information by adding a time code () syntax 810 to the cc_data () syntax.
  • the video encoding apparatus 920 may generate a bitstream by encoding caption information in units of frames.
  • the video encoding apparatus 920 may identify synchronization information in the auxiliary data space of the second video signal, and add the identified synchronization information to the user data syntax among the syntaxes of the second bitstream.
  • the video encoding apparatus 920 may transmit the bitstream to which the synchronization information is added to the multiplexing apparatus 930.
  • the multiplexer 930 checks the cc_data () syntax of the MPEG-2 TS (Transport Stream) received by the MPEG-2 encoding apparatus 910 and the user_data () syntax of the bitstream received by the video encoding apparatus 920. By identifying the synchronization information of each frame and synchronizing and multiplexing the MPEG-2 TS (Transport Stream) received by the MPEG-2 encoding apparatus 910 and the bitstream received by the video encoding apparatus 920 using the identified synchronization information. , MPEG-2 3DTV TS signal for 3DTV broadcast content can be generated and output.
  • FIG. 10 is a flowchart illustrating a method of adding synchronization information according to an embodiment of the present invention.
  • the apparatus 100 for adding synchronization information may generate synchronization information including a time code based on a reception time of a video signal or a reproduction time of a video frame.
  • the apparatus 100 for adding synchronization information may add synchronization information generated in operation S1010 to the auxiliary data space of the video signal.
  • the encoding apparatus 410 may generate a bitstream by encoding the video signal to which synchronization information is added in units of frames in operation S1020.
  • the encoding apparatus 410 may identify sync information in the auxiliary data space of the video signal, and generate a bitstream by encoding the video signal divided in units of frames together with the sync information corresponding to the corresponding frame.
  • the multiplexing apparatus 420 may synchronize and multiplex the plurality of bitstreams based on the synchronization information included in the bitstream generated in operation S1030.
  • the multiplexing apparatus 420 may identify sync information of the bitstream in step S1030 and search for another bitstream having the same sync information as the identified sync information. Next, the multiplexing apparatus 420 may synchronize the multiplexed frames of the retrieved bitstream with the frames of the bitstream generated in step S1020 according to the synchronization information.
  • a separate synchronization signal may be transmitted or a decoding apparatus may synchronize images corresponding to the video signal without a separate synchronization process.
  • the terminal receiving the bitstream may synchronize and reproduce the plurality of bitstreams even when the plurality of bitstreams are transmitted without a synchronization process.
  • bitstreams to be synchronized are searched and synchronized with the synchronization information included in the bitstream, the bitstreams to be synchronized may be searched and synchronized among the received bitstreams without receiving the bitstreams to be synchronized at the same time.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Graphics (AREA)
  • Computer Security & Cryptography (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

La présente invention concerne un appareil et un procédé pour ajouter des informations de synchronisation à un espace de données auxiliaire dans un signal vidéo et synchroniser une vidéo. L'appareil d'ajout d'informations de synchronisation comprend : une unité de génération d'informations de synchronisation pour générer des informations de synchronisation ; et une unité d'ajout d'informations de synchronisation pour ajouter les informations de synchronisation à un espace de données auxiliaire dans un signal vidéo.
PCT/KR2012/003837 2011-10-18 2012-05-16 Appareil et procédé pour ajouter des informations de synchronisation à un espace de données auxiliaire dans un signal vidéo et synchroniser une vidéo WO2013058455A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/352,892 US9723259B2 (en) 2011-10-18 2012-05-16 Apparatus and method for adding synchronization information to an auxiliary data space in a video signal and synchronizing a video

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20110106544 2011-10-18
KR10-2011-0106544 2011-10-18
KR10-2012-0044609 2012-04-27
KR1020120044609A KR101853504B1 (ko) 2011-10-18 2012-04-27 비디오 신호의 보조 데이터 공간에 동기 정보를 추가하여 영상을 동기화하는 장치 및 방법

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WO2013058455A1 true WO2013058455A1 (fr) 2013-04-25

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003284010A (ja) * 2002-03-26 2003-10-03 Mitsubishi Electric Corp 符号化装置及びメディアデータ同期方法
JP2004040455A (ja) * 2002-07-03 2004-02-05 Nippon Television Network Corp 伝送再生方法、伝送方法、及びそのシステム
KR20050014945A (ko) * 2003-08-01 2005-02-21 (주)바이웍스 텔레비전 방송 프로그램과 연관된 데이터 서비스를제공하기 위한 시스템

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003284010A (ja) * 2002-03-26 2003-10-03 Mitsubishi Electric Corp 符号化装置及びメディアデータ同期方法
JP2004040455A (ja) * 2002-07-03 2004-02-05 Nippon Television Network Corp 伝送再生方法、伝送方法、及びそのシステム
KR20050014945A (ko) * 2003-08-01 2005-02-21 (주)바이웍스 텔레비전 방송 프로그램과 연관된 데이터 서비스를제공하기 위한 시스템

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