WO2014142409A1 - Appareil d'affichage d'images, et procédé correspondant de gestion de flux vidéo - Google Patents

Appareil d'affichage d'images, et procédé correspondant de gestion de flux vidéo Download PDF

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Publication number
WO2014142409A1
WO2014142409A1 PCT/KR2013/008650 KR2013008650W WO2014142409A1 WO 2014142409 A1 WO2014142409 A1 WO 2014142409A1 KR 2013008650 W KR2013008650 W KR 2013008650W WO 2014142409 A1 WO2014142409 A1 WO 2014142409A1
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Prior art keywords
video stream
channel
view image
image
stream corresponding
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PCT/KR2013/008650
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English (en)
Korean (ko)
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황보상규
고시은
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엘지전자 주식회사
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Publication of WO2014142409A1 publication Critical patent/WO2014142409A1/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]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • H04N21/4622—Retrieving content or additional data from different sources, e.g. from a broadcast channel and the Internet
    • 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
    • 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]
    • H04N21/20—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
    • H04N21/235—Processing of additional data, e.g. scrambling of additional data or processing content descriptors
    • H04N21/2353—Processing of additional data, e.g. scrambling of additional data or processing content descriptors specifically adapted to content descriptors, e.g. coding, compressing or processing of metadata
    • 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
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • 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
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/845—Structuring of content, e.g. decomposing content into time segments
    • H04N21/8455—Structuring of content, e.g. decomposing content into time segments involving pointers to the content, e.g. pointers to the I-frames of the video stream

Definitions

  • the present invention relates to a video display device and a video stream control method thereof, and more particularly, to a video display device and a video stream control method thereof for enabling a stereoscopic image display.
  • the basic principle of the stereoscopic method is to separate and input images arranged to be orthogonal to each other in the left and right eyes of a person, and to input stereoscopic images by combining the input images of the left and right eyes in the human brain.
  • the images arranged to be orthogonal to each other become a left view image and a right view image, respectively.
  • the left eye and right eye images are viewed from the left eye and the right eye through polarized glasses or the display device itself, the user perceives a stereoscopic effect.
  • both the left eye image and the right eye image for receiving a stereoscopic image are received through one transmitting side, for example, a broadcasting network. Accordingly, it is difficult to receive a large amount of data in the video display device due to limitations such as the transmission speed of the data transmitted from the broadcasting network to the video display device and the capacity of data transmission. Therefore, in addition to one transmitting side, is a method of receiving data for a stereoscopic image service through a plurality of transmitting sides being considered? Furthermore, in the case where data for the left eye image and the right eye image are received through a plurality of transmitters, a method of effectively processing the received data is considered in order to effectively implement a 3D image service using the image display apparatus. Can be.
  • an image display apparatus capable of providing a stereoscopic image more quickly in response to a channel for providing a stereoscopic image selected using the same; It provides a video stream control method thereof.
  • a method of controlling a video stream for implementing a stereoscopic image in the image display apparatus in response to the image display device is switched to the operation mode, Searching for a channel providing an image, receiving a video stream corresponding to a first view image from a first transmitter corresponding to the searched channel, and performing buffering on the video stream corresponding to the first view image And if the searched channel is selected, a video stream corresponding to the buffered first view image and a video stream corresponding to a second view image received from a second transmitting side using a different network from the first transmitting side. It characterized in that it comprises a step of implementing a three-dimensional image by using.
  • the buffering may include pre-buffering in which buffering is performed even before a channel for outputting a stereoscopic image corresponding to the video stream corresponding to the first view image is selected. This is characterized in that it is performed.
  • the pre-buffering of the video stream corresponding to the first view image may be performed until the process before synchronizing with the video stream corresponding to the second view image to implement a stereoscopic image. It is characterized by.
  • the searched channel may be a hybrid channel that receives a video stream corresponding to the first view image and a video stream corresponding to the second view image through different transmitting sides, respectively.
  • buffering is performed on a video stream corresponding to a first view image corresponding to at least one channel based on a preset priority. It features.
  • the preset priority may be set to at least one of a proximity between a currently selected channel and a hybrid channel, a user preference for the plurality of hybrid channels, and a start time of a broadcast program corresponding to the plurality of hybrid channels, respectively. It is characterized in that determined on the basis of.
  • the plurality of hybrid channels may include first and second channels, and the priority of the first channel is higher than that of the second channel, and corresponds to the first channel.
  • a start time is later than a start time of a broadcast program corresponding to the second channel, buffering of a video stream corresponding to a first view image corresponding to the second channel having a lower priority than the first channel is performed. It is characterized by.
  • the second channel is received.
  • the buffering of the video stream corresponding to the first view image corresponding to the first image is stopped, and the buffering of the video stream corresponding to the first view image corresponding to the first channel is performed.
  • the information corresponding to the user preference may include at least one of pre-stored preferred channel information, user's viewing trend information on the plurality of hybrid channels, and channel information set by the user.
  • spaces other than one of the plurality of buffering spaces may correspond to first view images of the plurality of hybrid channels.
  • the video streams are each buffered.
  • one of the plurality of buffering spaces may be a buffering space for a video stream associated with the switched channel and corresponding to a first view image that is not buffered at the time of channel switching.
  • the video stream corresponding to the first view image may be received through an internet network, and the video stream corresponding to the second view image may be received through a broadcasting network.
  • the video stream corresponding to the second view image may be a video stream corresponding to a reference view image.
  • the video stream corresponding to the first view image may be received earlier by an amount of data corresponding to a preset criterion than the video stream corresponding to the second view image.
  • the time point at which the video stream corresponding to the first view image is buffered may be determined based on whether a broadcast program of a video stream corresponding to the first view image is started.
  • an image display apparatus for implementing a stereoscopic image includes a search unit for searching for a channel for providing a stereoscopic image in response to the image display apparatus being switched to an operation mode, and an image corresponding to the searched channel.
  • the buffering of the video stream corresponding to the extended view image may be performed even before the searched channel is selected.
  • Control a buffering unit, and if the searched channel is selected, Chapter by using a video stream corresponding to the video stream and the reference point corresponding to the point image is characterized in that a control unit for implementing a three-dimensional image.
  • the searched channel may be a hybrid channel for receiving a video stream corresponding to the extended view image and a video stream corresponding to the reference view image through different transmitting sides, respectively.
  • buffering is performed on a video stream corresponding to an extended view image corresponding to at least one channel based on a preset priority.
  • the video stream corresponding to the extended view image may be received through an internet network, and the video stream corresponding to the reference view image may be received through a broadcast network.
  • the time point at which the video stream corresponding to the extended view image is buffered may be determined based on whether a broadcast program of a video stream corresponding to the extended view image is started.
  • the present invention even if a channel for providing a stereoscopic image is not selected, at least one of the video streams received using different communication networks is buffered, so that when a channel for providing a stereoscopic image is selected, the stereoscopic image is selected.
  • Sync for multiple video streams that implement Therefore it is possible to reduce the time until the stereoscopic image is substantially implemented, so that the user can be provided with the stereoscopic image immediately when the channel is switched.
  • a plurality of channels for providing a stereoscopic image may be buffered according to priority, and thus a channel to be buffered may be flexibly selected according to a user's preference and a start time of a program.
  • FIG. 1 is a conceptual diagram illustrating an image display device according to an exemplary embodiment.
  • FIG. 2 is a flowchart illustrating a control method of an image display device according to an exemplary embodiment.
  • FIG. 3 is a conceptual diagram illustrating the control method described with reference to FIG. 2.
  • FIG. 4 is a flowchart illustrating a control method for a plurality of channels in an image display device according to an exemplary embodiment.
  • 5, 6, and 7 are conceptual views illustrating priorities related to a plurality of channels in an image display device according to an exemplary embodiment.
  • FIG. 8 is a conceptual diagram illustrating buffering for a video stream in an image display device according to an exemplary embodiment.
  • 9A, 9B, 9C, 9D, 9E, 10A, 10B, 10C, 10D, and 10E are conceptual diagrams for describing syntax for providing information about a video stream.
  • 3-D or 3D is used to describe a visual expression or display technique that attempts to reproduce a stereoscopic image (hereinafter referred to as a '3D image') having an optical illusion of depth.
  • a '3D image' a stereoscopic image having an optical illusion of depth.
  • the observer's visual cortex interprets the two images into a single 3D image.
  • the three-dimensional (3D) display technology adopts the technology of 3D image processing and representation for a device capable of 3D image display.
  • a device capable of displaying 3D images may require the use of a special viewing device to effectively provide the viewer with three-dimensional images.
  • Examples of 3D image processing and representation include stereoscopic image / video capture, multi-view image / video capture using multiple cameras, and processing of two-dimensional image and depth information.
  • Examples of display devices capable of displaying 3D images include liquid crystal displays (LCDs), digital TV screens, and computer monitors having appropriate hardware and / or software supporting 3D image display technology.
  • Examples of special observation devices include specialized glasses, goggles, headgear, eyewear, and the like.
  • 3D image display technology includes anaglyph stereoscopic images (commonly used with passive red blue glasses), polarized stereoscopic images (commonly used with passive polarized glasses), and alternating-frame sequencing. (Typically used with active shutter eyeglasses / headgear), autostereoscopic displays using lenticular or barrier screens, and the like.
  • anaglyph stereoscopic images commonly used with passive red blue glasses
  • polarized stereoscopic images commonly used with passive polarized glasses
  • alternating-frame sequencing typically used with active shutter eyeglasses / headgear
  • autostereoscopic displays using lenticular or barrier screens and the like.
  • Some 3D image display technologies may use rotating or alternating optical devices, for example segmented polarizers attached to a color filter wheel, which requires synchronization with each other.
  • Another 3D image display technology is a digital light processor based on a digital micromirror device (DMD) using a rotatable microscopic mirror, arranged in a rectangular array corresponding to the pixels of the image to be displayed.
  • DMD digital micromirror device
  • DLP digital light processor
  • Stereoscopic image coding and stereoscopic distribution formatting include color analysis, pixel sub-sampling (side-by-side, checkerboard, quincunx, etc.). ), And enhanced video coding (2D + Delta, 2D + Metadata, 2D with depth information).
  • color analysis side-by-side, checkerboard, quincunx, etc.
  • enhanced video coding (2D + Delta, 2D + Metadata, 2D with depth information).
  • 3D image display technology described in terms of image reproduction and display environments for digital images or 3D TVs.
  • the details are not intended to limit the various features described herein and are applicable to other types of display technologies and devices.
  • 3D TV technology can be applied not only to TV broadcasting but also to Blu-rayTM, console games, cables, and IPTV transmissions, mobile phone content delivery, and so on.
  • Blu-ray devices eg, Blu-ray TM Disk (BD) players
  • DVD players e.g, DVD players, and TV content distributors.
  • stereoscopic image / video capture is referred to as a stereo image method considering two viewpoints, and multi-view image / video capture using multiple cameras considers three or more viewpoints. It is referred to as a multiview image system.
  • the stereo image method uses a pair of left and right images obtained by photographing the same subject with a left camera and a right camera spaced apart by a certain distance.
  • the multi-view image method uses three or more images obtained by photographing from three or more cameras having a constant distance or angle.
  • two images among the images are designated as a left view image and a right view image, thereby enabling to implement a stereoscopic image.
  • the present invention is not necessarily limited thereto, and it is also possible to implement another stereoscopic method using three or more images (for example, an integrated imaging method).
  • the stereo image or the multi-view image may be compressed and transmitted by various methods including a moving picture expert group (MPEG).
  • MPEG moving picture expert group
  • a stereo image or a multiview image may be compressed and transmitted by using an H.264 / AVC (Advanced Video Coding) method.
  • the reception system may obtain a 3D image by decoding the received image in the inverse of the H.264 / AVC coding scheme.
  • one of the stereo image or the multi-view image is assigned to the base layer image, the remaining image is extended layer (extended layer or extension layer) image, the base layer image in the same manner as the monoscopic image
  • the image of the enhancement layer may be encoded and transmitted only with respect to the relationship information between the base layer and the image of the enhancement layer.
  • Examples of the compression incubation method for the base layer image may be JPEG, MPEG-2, MPEG-4, H.264 / AVC method, and the compression encoding method for the image of the extended layer is H.264 / MV (Multi -view Video Coding) method may be used.
  • the video display device and the video stream control method of the video display device capable of outputting such a three-dimensional image is different transmission using a different communication network video stream corresponding to the base layer image and video stream corresponding to the enhancement layer image It is possible to receive from the side. Furthermore, in the video display device and the video stream control method of the video display device according to the present invention, a channel for providing a stereoscopic image implemented using a video stream corresponding to a base layer image and a video stream corresponding to an extended layer image is selected. Even before it is possible, it is possible to first perform buffering on at least one of the video streams.
  • buffering is performed on at least one of the plurality of video streams for implementing the stereoscopic image in advance, so that the plurality of video streams when the stereoscopic image is implemented. Sync between them faster. Therefore, when the channel of the image display device is switched to a channel for providing a stereoscopic image, it is possible to immediately provide a stereoscopic image.
  • FIG. 1 is a conceptual diagram illustrating an image display device according to an exemplary embodiment.
  • the video display device 100 includes a tuner 101 for receiving a digital broadcast signal. ) And an Ethernet unit (Ethernet) 102.
  • the tuner 101 may receive a digital broadcast signal through a broadcast room (RF)
  • the Ethernet unit 102 may receive a digital broadcast signal through an internet network.
  • Such an internet network may serve to deliver a video stream transmitted from a network to the Ethernet unit 102.
  • digital broadcast signals may be received through different networks.
  • the digital broadcast signals received by the tuner 101 and the Ethernet unit 102 may include video streams corresponding to different viewpoint images. That is, the video stream included in the digital broadcast signal received through the tuner 101 is a video stream corresponding to the second view image, and the video stream included in the digital broadcast signal received through the Ethernet unit 102 is The video stream may correspond to a first view image different from the second view image.
  • the video stream corresponding to the second view image included in the digital broadcast signal received through the broadcasting room RF may be a video stream corresponding to the reference view image (or the base layer image and the left eye image).
  • the video stream corresponding to the first view image included in the digital broadcast signal received through the internet network may be a video stream corresponding to the extended view image (or the extended layer image or the right eye image).
  • the tuner 101 may select only one channel desired by the user from various broadcast channel signals transmitted from a broadcasting station to exclude a disturbance signal and convert the video signal into an audio and video signal.
  • the image display apparatus 100 may include a storage 103, first and second video decoders 104a and 104b, an audio decoder 105, and a sync unit 106.
  • the apparatus may further include first and second display engines 107a and 107b, a 3D processing unit 108, an amplifier 109, and a 3D display panel 110.
  • the storage unit 103 may include at least one of internal and external storage devices, and the external storage device may include a USB, an external hard drive, or the like.
  • the storage unit 103 may store a broadcast signal received through the Ethernet unit 102.
  • decoding may be performed on the video stream corresponding to the second view image
  • decoding may be performed on the video stream corresponding to the second view image.
  • the first and second video decoders 104a and 104b may decode video streams using different decoders.
  • the MPEG-2 decoder is used to decode the video stream corresponding to the second view image
  • the AVC / H.264 decoder is used to decode the second video stream.
  • the video stream corresponding to the viewpoint image may be decoded.
  • the first and second video decoders 104a and 104b decode the video stream or the signal compressed in a specific manner, and use the video display device (for example, 3D TV) according to the present invention. It can serve to convert the video signal form.
  • the audio decoder 105 may play a role of deciphering the audio signal compressed in a specific manner and converting the audio signal into an audio signal type used in a video display device (for example, 3D TV) according to the present invention. .
  • the sink unit 106 implements a stereoscopic image by using the video stream corresponding to the second view image and the second view image and the first view image corresponding to the video stream corresponding to the first view image
  • the second view image is implemented.
  • the output timing of the view image and the first view image may be adjusted.
  • 'adjusting the output timing of the second view image and the first view image' may also be expressed as 'matching the sync'. That is, the sink unit 106 may adjust an output time point of the second view image and the first view image so that a stereoscopic image may be realized through the second view image and the first view image captured at the same view.
  • the sink unit 106 may synchronize with reference to time information (or timing information) of the video stream corresponding to the second view image and the video stream corresponding to the first view image.
  • the timing information may be included in at least one of a video stream corresponding to the second view image and a video stream corresponding to the first view image.
  • the sink unit 106 may be configured such that the second view image decoded by the first and second video decoders 104a and 104b and the signal corresponding to the first view image are output timing (or synchro) corrected. To the output of video decoders 104a and 104b.
  • the image quality of the second viewpoint image and the first viewpoint image may be improved, and the image size may be adjusted.
  • the 3D processing unit 108 may serve to convert the stereoscopic image (or 3D data) so that the stereoscopic image is appropriately output to the 3D display panel.
  • the amplifier 109 may amplify the decoded audio signal, and the 3D display panel 110 may serve to display a stereoscopic image.
  • the buffer unit 120 may be located between the Ethernet unit 102 and the storage unit 103.
  • the buffer unit 120 may perform buffering on the first view video stream included in the digital broadcast signal received from the Ethernet unit 102.
  • the buffer unit 120 stores the video stream corresponding to the received first view image in the storage unit 103 so as to be stored in the storage unit 103. It may serve to push a video stream corresponding to the image. That is, the buffer unit 120 may buffer the video stream corresponding to the first view image even before a channel associated with the video stream corresponding to the first view image is selected. As such, the buffering is performed before the channel is selected may be expressed as 'pre-burffering'. Meanwhile, hereinafter, even though the terms 'buffering' and 'pre-buffering' are used interchangeably, it may be understood that buffering is performed before the channel is selected as 'pre-buffering'.
  • the buffer unit 120 selects a video stream corresponding to the first view image stored in the storage unit 120 to a second decoder ( The storage unit 120 may push the video stream corresponding to the stored first view image to be transferred to 104b).
  • the buffer unit 120 performs buffering so that the video stream corresponding to the received first view image is stored in the storage unit 103, and then the first view point.
  • the video stream corresponding to the first view image stored by the second decoder 104b may be delivered to the second decoder 104b. Therefore, in a communication environment having a slow communication speed, after buffering a predetermined amount of the video stream corresponding to the first view image, when the corresponding channel is selected, the buffered video stream and the second received in response to the selection of the channel.
  • the video stream corresponding to the viewpoint image may be decoded and synchronized to synchronize the stereoscopic image.
  • the transmitting side of the video stream corresponding to the first view image received in the communication environment having a slow communication speed may transmit the video stream a predetermined time before the transmitting side of the video stream corresponding to the second view image.
  • the buffer unit 120 when the buffer unit 120 is provided, even if the reception speed of the video stream received through the Ethernet unit 102 through the Internet network is slow, the video stream received by the tuner 101 through the broadcast network is previously received. If the video stream received through the Ethernet unit 102 is received, even if the corresponding channel is selected, it is possible to quickly implement a stereoscopic image without delay.
  • the buffered video stream stored in the storage unit 103 may be delivered to the second decoder 104b in response to selecting a channel corresponding to the buffered video stream.
  • another buffer unit may be located between the tuner 101 and the first video decoder 104a.
  • the other buffer unit may perform buffering on a video stream corresponding to the second view image included in the digital broadcast signal received through the broadcasting network.
  • the image display apparatus and its control method buffer the video stream even before a channel is selected, and thus, when a corresponding channel is selected, a stereoscopic image is faster. It is possible to implement
  • FIG. 2 is a flowchart illustrating a control method of an image display apparatus according to an exemplary embodiment
  • FIG. 3 is a conceptual diagram illustrating the control method described with reference to FIG. 2.
  • the image display apparatus switches to the operation mode or enters the operation mode (S210).
  • the operation mode of the video display device refers to a case in which power is applied to the video display device, that is, the video display device is powered on.
  • the operation mode corresponding to when the power is applied to the video display device or the power is turned on may mean that the video display device is controlled such that an image is displayed on the video display device. In the standby mode opposite to the operation mode, the image may not be displayed on the image display device.
  • the image display apparatus searches for a channel (S220).
  • a channel is found in the searching, it is determined whether the channel is a hybrid channel that receives a video stream corresponding to the first view image and a video stream corresponding to the second view image through different transmitting sides.
  • the process proceeds (S230).
  • the steps S220 and S230 may be made of one step of searching for the 'hybrid channel'.
  • the first transmitting side may be a network server transmitting a video stream corresponding to the first view image through the internet network.
  • the first transmitting side can transmit the video stream even before the broadcast program starts. Therefore, in the video display device according to the present invention, it is possible to perform pre-buffering by receiving a video stream in advance before the broadcast program starts.
  • the search for the channel may be continued.
  • the video stream corresponding to the first view image is based on at least one of a start time, whether to start or not, and the progress of the broadcast program of the video stream corresponding to the received first view image.
  • the buffering time of may be determined.
  • the video stream corresponding to the first view image buffered corresponding to the started broadcast program may be changed. For example, the first five minutes of the video stream may be buffered before the broadcast program starts.
  • the video stream corresponding to the first view image may be continuously buffered by changing a buffered time point by a preset amount until the corresponding broadcast program ends.
  • the searched channel is selected (or the searched hybrid channel is selected) (S260).
  • the buffer unit 120 may deliver a video stream corresponding to the buffered first view image to the second decoder 104b.
  • the tuner 101 may receive a video stream corresponding to the second view image and deliver the video stream to the first decoder 104a.
  • the sink 106 may adjust the sync of the image signals decoded through the first and second decoders 104a and 104b. That is, the sink unit 106 can take out video signals decoded by the first and second decoders 104a and 104b from the first and second decoders 104a and 104b in synchronization with each other. In this way, the image signal with the adjusted sync may be finally output as a 3D image through the 3D display panel 110.
  • the video stream 310 corresponding to the first view image received through the Internet network is more time than the video stream 320 corresponding to the second view image received through the broadcasting network. 't' can be received in advance and buffered.
  • the video stream 320 corresponding to the two-view video may be received in advance by 't' and buffered.
  • the video display device and the video stream control method thereof by receiving at least one of a plurality of video streams for implementing a stereoscopic image in advance, and buffering it, thereby implementing a stereoscopic image It is possible to quickly and stably sync to decoded video streams.
  • FIGS. 5, 6, and 7 are views illustrating an image display apparatus according to an embodiment of the present invention. It is a conceptual diagram for explaining the priority associated with a plurality of channels.
  • the buffer unit 120 when a plurality of hybrid channels are searched through a search for a channel (S210) and a determination of a hybrid channel (S230), the buffer unit 120 provides a plurality of hybrid channels. If both include enough buffers to perform buffering, the plurality of hybrid channels may be buffered. In this case, the buffer unit 120 may not perform buffering on at least one buffer. That is, the buffer unit 120 may leave at least one buffer as a preliminary buffer and use the buffering space for the unbuffered hybrid channel when it is selected.
  • the video display device may give priority to the plurality of channels and perform pre-buffering in the order of high priority.
  • the priority of selecting at least one hybrid channel in consideration of the priority of the plurality of hybrid channels is determined in operation 231 and the priority of the plurality of hybrid channels. It may be further embodied in the step (S232) to determine.
  • step 231 if there is a plurality of searched hybrid channels, if there is only one hybrid channel, step S240 described with reference to FIG. 2 may be performed.
  • priorities of the plurality of hybrid channels may include a proximity between the currently selected channel and the plurality of hybrid channels, a user preference for the plurality of hybrid channels, and a start time of a broadcast program corresponding to the plurality of hybrid channels, respectively. It may be determined based on at least one.
  • the information corresponding to the user preference may include at least one of pre-stored preferred channel information, user's viewing trend information on the plurality of hybrid channels, and channel information directly set to be pre-buffered by the user. have.
  • the start time information of the broadcast program may be obtained through an event information table (EIT) or an electronic program guide (EPG).
  • the factors considered for determining the priority of the hybrid channel will be described in more detail.
  • the viewing time of the plurality of channels is monitored. By doing this, it is possible to determine the priority.
  • the video display device displays the channel (or the cumulative viewing) that has the longest viewing time at a predetermined time interval (for example, every 5 minutes). After prioritizing by the channel with the longest time, it can be tabled. Such a table may be updated periodically (eg, once every two weeks).
  • the viewing time for each channel may mean a time when a video stream corresponding to the second view image is played in the corresponding channel, that is, a time when the 3D image is actually output through the corresponding channel.
  • Ranking may be given. For example, if ch 3, ch 4, ch 5, and ch 6 are present and the channel currently being watched is ch 4 and priority is not determined for ch 3 and ch 6, ch 3 is closer to ch 4. This may have a higher priority than ch6. That is, this is to naturally implement stereoscopic image switching in the channel switching operation.
  • the start time of the program may be further considered in the priority determination.
  • the priority of the first channel is higher than the priority of the second channel
  • the start time of the broadcast program corresponding to the first channel is If it is later than the start time of the broadcast program corresponding to the second channel, pre-buffering for the video stream corresponding to the second channel may be performed first. That is, in the video display device according to the present invention, pre-buffering for a channel having a low priority may be performed based on a start time of a broadcast program. In this case, when the start time of the broadcast program corresponding to the first channel arrives while buffering the video stream corresponding to the first view image corresponding to the second channel, the second channel corresponds to the second channel.
  • the buffering of the video stream corresponding to the first view image may be stopped, and the buffering of the video stream corresponding to the first view image corresponding to the first channel may be performed.
  • buffering for the second channel may also be continuously performed.
  • the buffer unit 120 has first, second and third buffers, and the third buffer is left as a preliminary space for performing buffering when a channel that is not pre-buffered is selected.
  • the pre-buffering order is performed. First, pre-buffering is performed on a broadcast program of channel A in the first buffer during the first time. Then, during the second time period, the first buffer continues to pre-buffer a broadcast program of channel A, and in the second buffer, pre-buffered to a broadcast program of B channel is performed. In addition, although a broadcast program of channel C starts at the third time, since the channel C has a lower priority than the channels A and B, pre-buffering is not performed, and in the first buffer, Pre-buffering of the broadcast program of channel A is performed, and pre-buffering of the broadcast program of channel B is performed in the second buffer. In this manner, the pre-buffering may be continuously performed until the broadcast program of the channel having the higher priority ends.
  • the a broadcast program of the C channel is pre-buffered in the first buffer, and the a broadcast program of the B channel is free in the second buffer. Can be buffered.
  • a broadcast program of channel B is terminated at the fifth time, only a broadcast program of channel C may be pre-buffered in the first buffer.
  • the broadcast program a of channel C may be continuously buffered in the first buffer, and the broadcast program b of channel B may be pre-buffered in the second buffer.
  • only the b broadcast program of the B channel may be pre-buffered in the second buffer.
  • the video display device when there are a plurality of hybrid channels, reasonably pre-buffering the plurality of hybrid channels based on a program start time, the number and priority of the pre-bufferable buffers. It is possible to carry out.
  • the video stream corresponding to the first view image may be received before the video stream corresponding to the second view image.
  • the image display apparatus according to the present invention as shown in FIG. 8, even when the video stream 810 corresponding to the first view image and the video stream 820 corresponding to the second view image are simultaneously received.
  • Pre-buffering may be simultaneously performed by the amount corresponding to the time 't'.
  • the object to which the pre-buffering is performed in this way it is possible to apply not only to the real-time broadcast, but also in the VOD service (video on demand).
  • FIGS. 9B, 9C, 9D, 9E, 10A, 10B, 10C, 10D, and 10E are conceptual diagrams for describing syntax for providing information about a video stream.
  • FIG. 9A is a block diagram illustrating syntax for providing information on a video stream for convenience of description, and details corresponding to each block are described in detail with reference to FIGS. 9B, 9C, 9D, and 9E. .
  • FIG. 9B the part corresponding to "a” of FIG. 9A is shown in FIG. 9B
  • the part corresponding to "b” of FIG. 9A is shown in FIG. 9C
  • the part corresponding to "c” of FIG. 9A 9D a portion corresponding to “d” of FIG. 9A is illustrated in FIG. 9E.
  • FIG. 9A the description of FIG. 9A will be understood with reference to all of FIGS. 9A, 9B, 9C, 9D, and 9E.
  • FIG. 9A illustrates a content access process for a real-time or non-real time hybrid 3DTV streaming broadcast service.
  • PID_PS (Private Section) has information of a sub picture media, and refers to information for synchronizing a base picture with a sub picture. There is PTS, ES level SMPTE timecode, and PES level media pairing information. The PES information is additionally referred to in PID_PD.
  • PID_PD Primary Data
  • Hybrid_service_current_next_indicator indicates whether a service is currently provided or future, and distinguishes real-time and non-real-time by linking with “hybrid_service_type”.
  • Hybrid_service_sync_type indicates PTS, SMPTE Timecode of ES level, and media pairing information of PES level.
  • Play_start_time represents start time information of an additional video file. In the case of a streaming service, this indicates the start time information of a program.
  • hybrid broadcast information may be obtained from the EIT as in the third syntax 930a.
  • the fourth syntax 940a uses the two pieces of information to synchronize the media pairing information at the PES level.
  • the fifth syntax 950a indicates a process of bringing the additional video to the streaming server to bring data.
  • FIG. 10A illustrates a content access process for a hybrid 3DTV download broadcast service.
  • FIG. 10A is a block diagram illustrating syntax for providing information on a video stream for convenience of description, and details corresponding to each block are described in detail with reference to FIGS. 10B, 10C, 10D, and 10E. .
  • FIG. 10B the part corresponding to "a” of FIG. 10A is shown in FIG. 10B
  • the part corresponding to "b” of FIG. 10A is shown in FIG. 10C
  • the part corresponding to "c” of FIG. 10A 10d a portion corresponding to “d” of FIG. 10a is illustrated in FIG. 10e.
  • FIG. 10A the description of FIG. 10A will be understood with reference to all of FIGS. 10A, 10B, 10C, 10D, and 10E.
  • PID_PS (Private Section) has information of a sub picture media, and refers to information for synchronizing a base picture with a sub picture. There is PTS, ES level SMPTE timecode, and PES level media pairing information. The PES information is additionally referred to in PID_PD.
  • PID_PD Primary Data
  • Hybrid_service_sync_type indicates PTS, SMPTE Timecode of ES level, and media pairing information of PES level.
  • Play_start_time represents start time information of an additional video file. In the case of a streaming service, this indicates the start time information of a program.
  • Expiration_time represents the effective time in the receiver of the additional video file.
  • Playtime_length_in_seconds represents play time information, and “Num_reference_media_files” represents the number of reference files.
  • hybrid broadcast information may be obtained from the EIT as in the third syntax 930b.
  • the fourth syntax 940b uses the two information to synchronize the media pairing information at the PES level.
  • the fifth syntax 950b is a process of bringing the additional video to the download server to bring data.
  • the present invention even if a channel providing a stereoscopic image is not selected, at least one of the video streams received using different communication networks is buffered, so that the channel providing the stereoscopic image is If selected, the synchronization of a plurality of video streams for implementing a stereoscopic image may be directly adjusted. Therefore, it is possible to reduce the time until the stereoscopic image is substantially implemented, so that the user can be provided with the stereoscopic image immediately when the channel is switched.
  • a plurality of channels for providing a stereoscopic image may be buffered according to priority, and thus a channel to be buffered may be flexibly selected according to a user's preference and a start time of a program.
  • a computer program (executed by a computer, a processor, a controller, etc.) stored in a computer-executable medium for implementing a method of receiving a stereoscopic image signal and a receiving apparatus of a stereoscopic image signal in digital broadcasting is It may include one or more program code sections for performing various tasks.
  • a software tool (executed by a computer, a processor, a controller, etc.) stored in a computer-executable medium for implementing a method of receiving a stereoscopic image signal and a receiving apparatus of the stereoscopic image signal in digital broadcasting, It can contain parts of program code that perform a variety of tasks.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Computer Graphics (AREA)
  • Library & Information Science (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

L'invention concerne un appareil d'affichage d'images et un procédé correspondant de gestion de flux vidéo, et plus particulièrement un appareil d'affichage d'images capable d'afficher une image stéréoscopique et un procédé correspondant de gestion de flux vidéo. Le procédé de gestion de flux vidéo conçu pour la mise en œuvre d'une image stéréoscopique par l'appareil d'affichage d'images selon un mode de réalisation de l'invention comprend les étapes qui consistent : à rechercher un canal fournissant une image stéréoscopique en réaction à la commutation sur un mode de fonctionnement par l'appareil d'affichage d'images ; à recevoir un flux vidéo correspondant à une première image de l'instant temporel en provenance d'un premier côté d'émission correspondant au canal découvert ; à ranger en mémoire tampon le flux vidéo correspondant à la première image de l'instant temporel ; et à mettre en œuvre l'image stéréoscopique au moyen, d'une part du flux vidéo rangé en mémoire tampon et correspondant à la première image de l'instant temporel, et d'autre part d'un flux vidéo correspondant à une deuxième image de l'instant temporel reçue en provenance d'un deuxième côté d'émission utilisant un réseau différent du réseau utilisé par le premier côté d'émission quand le canal découvert est choisi.
PCT/KR2013/008650 2013-03-12 2013-09-27 Appareil d'affichage d'images, et procédé correspondant de gestion de flux vidéo WO2014142409A1 (fr)

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KR1020130026337A KR20140111875A (ko) 2013-03-12 2013-03-12 영상 표시장치 및 그것의 비디오 스트림 제어방법
KR10-2013-0026337 2013-03-12

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KR20190136417A (ko) * 2018-05-30 2019-12-10 삼성전자주식회사 3차원 360도 영상 데이터의 전송 방법, 그에 따른 디스플레이 장치, 및 그에 따른 영상 저장 장치

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