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WO2017193576A1 - Procédé et appareil d'adaptation de résolution de vidéo, et terminal de réalité virtuelle - Google Patents

Procédé et appareil d'adaptation de résolution de vidéo, et terminal de réalité virtuelle Download PDF

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Publication number
WO2017193576A1
WO2017193576A1 PCT/CN2016/109555 CN2016109555W WO2017193576A1 WO 2017193576 A1 WO2017193576 A1 WO 2017193576A1 CN 2016109555 W CN2016109555 W CN 2016109555W WO 2017193576 A1 WO2017193576 A1 WO 2017193576A1
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WO
WIPO (PCT)
Prior art keywords
video
display screen
virtual reality
effective display
size
Prior art date
Application number
PCT/CN2016/109555
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English (en)
Chinese (zh)
Inventor
许小飞
Original Assignee
乐视控股（北京）有限公司
乐视致新电子科技（天津）有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 乐视控股（北京）有限公司, 乐视致新电子科技（天津）有限公司 filed Critical 乐视控股（北京）有限公司
Publication of WO2017193576A1 publication Critical patent/WO2017193576A1/fr

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Classifications

    • 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
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
    • H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • 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
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
    • H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • H04N21/234363—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by altering the spatial resolution, e.g. for clients with a lower screen resolution
    • 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
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
    • 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
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
    • H04N21/440263—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by altering the spatial resolution, e.g. for displaying on a connected PDA

Definitions

  • the embodiments of the present invention belong to the field of image processing, and in particular, to a method and device for adapting video resolution and a virtual reality terminal.
  • Virtual Reality is a virtual world that uses computers to simulate three-dimensional space, allowing users to experience interactive and immersive experiences through vision and hearing.
  • Virtual reality technology is computer graphics. A comprehensive technology that intersects in the fields of human-computer interaction and sensing technology. With the rapid development of computer hardware and network environment, virtual reality technology has developed rapidly and many mature virtual reality systems have emerged. They have wide applications in virtual simulation, geographic information system, user social, game entertainment and so on. .
  • the visual system is the most important perceptual channel of VR.
  • the perceptibility of virtual scene is also a prerequisite for human-computer interaction in the virtual environment. Therefore, the scene display mode and its equipment are the basic components of human-computer interaction in VR system.
  • the commonly used scene display modes are helmet type, desktop type, projection type, hand-held type and free stereoscopic display mode, and each display mode includes multiple types of screen sizes.
  • the video content needs to be presented in high resolution, which makes the video file large, usually more than 1 GB capacity, and if it is rendered after downloading, the loading on the terminal device is too slow, and it is expensive and complicated.
  • the terminal device which is the first factor that affects the experience, so consider streaming to the end user via network streaming.
  • the video is compressed and encoded and stored on the server. It has multiple compression formats and resolution differences, such as SD, HD, and Ultra Clear. In order to be able to present the video streaming media comfortably and smoothly to the user, Video needs to be played in a variety of screen sizes and multiple resolutions. Therefore, there is a need for a method and apparatus for adapting video resolution in a virtual reality terminal.
  • the embodiments of the present invention provide a method, a device, and a virtual reality terminal for adapting video resolution, so that the user can perform virtual reality video playback online in a comfortable and smooth manner.
  • An embodiment of the present invention provides a method for adapting video resolution in a virtual reality terminal, which is applied to an electronic terminal, and includes:
  • the playback size of the video to be played is scaled to adapt the target resolution of the video playback to the effective display screen size based on the target resolution of the video playback and the effective display screen size of the display in the virtual reality terminal.
  • the effective display screen size of the display in the virtual reality terminal is represented by a long and wide pixel value of the effective display screen of the display in the virtual reality terminal.
  • obtaining the target resolution of the video playback comprises: selecting a video resolution from the candidate plurality of video resolutions as the target resolution according to the transmission speed and the available bandwidth.
  • obtaining the target resolution of the video playback comprises: capturing an operation event of the user, and selecting a fixed video resolution from the plurality of video resolutions as the target resolution according to the captured operation event. rate.
  • the playing size of the video to be played is scaled to distinguish the target of the video playing.
  • the rate adaptation to the effective display screen size includes:
  • An embodiment of the present invention provides an apparatus for adapting video resolution in a virtual reality terminal, including:
  • Obtaining a module obtaining an effective display screen size of the display in the virtual reality terminal and obtaining a target resolution of the video playing;
  • a video scaling module configured to scale a play size of the video to be played according to a target resolution of the video play and an effective display screen size of the display in the virtual reality terminal, so that the target resolution of the video play is adapted to the effective display screen size.
  • the effective display screen size of the display in the virtual reality terminal is represented by a long and wide pixel value of the effective display screen of the display in the virtual reality terminal.
  • the acquiring module is further configured to adaptively select a video resolution as the target resolution from the candidate multiple video resolutions according to the transmission speed and the available bandwidth.
  • the obtaining module is further configured to capture an operation event of the user, and select a fixed video resolution as the target resolution from the plurality of video resolutions according to the captured operation event.
  • the video scaling module is further configured to calculate a scaling ratio of a play size of the video according to a target resolution of the video playing and an effective display screen size of the display in the virtual reality terminal. a playback size of the scaled video relative to the effective display screen size in a one-side fill amount in the length direction or a one-side fill amount in the width direction; and scaling the play size of the video to be played according to the calculated zoom ratio And performing, according to the calculated one-side filling amount, a double-side filling in the longitudinal direction or a double-side filling in the width direction on the area where the video content is not played on the effective display screen.
  • Embodiments of the present invention provide a virtual reality terminal, which includes a display, a processor, and a processor. Obtaining an effective display screen size of the display in the virtual reality terminal and obtaining a target resolution of the video playing, and playing the video to be played according to the target resolution of the video playing and the effective display screen size of the display in the virtual reality terminal The size is scaled to adapt the target resolution of the video playback to the effective display screen size.
  • the embodiment of the present invention provides a non-transitory computer readable storage medium, where the non-transitory computer readable storage medium stores program instructions for executing, when the terminal is the program instruction,
  • the playback size of the video to be played is scaled to adapt the target resolution of the video playback to the effective display screen size based on the target resolution of the video playback and the effective display screen size of the display in the virtual reality terminal.
  • An embodiment of the present invention provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions, when the program instructions are executed by the terminal, The terminal performs the above method.
  • the video to be played is scaled to adapt the target resolution of the video playback to the effective display screen size, thereby being adaptively presented on the screens of various sizes of virtual reality terminal devices according to the user's requirements for video resolution, so that the user is comfortable. Smooth viewing.
  • FIG. 1 is a schematic flowchart of a method for adapting video resolution in a virtual reality terminal according to an embodiment of the present invention
  • FIG. 2 is a schematic flow chart of selecting one-side filling according to Embodiment 2 of the present invention.
  • FIG. 3 is a schematic flowchart of adaptively selecting a video resolution as a target resolution from an alternative multiple video resolution according to Embodiment 3 of the present invention
  • FIG. 4 is a schematic flowchart of performing video adjustment according to Embodiment 4 of the present invention.
  • FIG. 5 is a schematic structural diagram of a video multi-resolution adaptive device in a virtual reality terminal according to Embodiment 5 of the present invention.
  • FIG. 6 is a schematic structural diagram of a virtual reality terminal according to Embodiment 6 of the present invention.
  • the effective display screen size of the display in the virtual reality terminal and obtaining the target resolution of the video playback; and scaling the video to be played according to the target resolution of the video playback and the effective display screen size of the display in the virtual reality terminal
  • the user can adaptively present on the screen of the virtual reality terminal device of various sizes according to the user's requirement for the video resolution, so that the user can obtain a comfortable and smooth viewing effect.
  • Any technical solution of implementing the embodiments of the present invention necessarily does not necessarily need to achieve all the above advantages at the same time.
  • the present invention provides a method and device for adapting video resolution in a virtual reality terminal, which is generally applied to a virtual reality video on demand network. If the resolution of the video matches the size of the effective display screen, the video is directly played; if not, Then, the technical solutions of the following embodiments are executed.
  • FIG. 1 is a schematic flowchart of a method for adapting video resolution in a virtual reality terminal according to an embodiment of the present invention, which may include:
  • Step S1 Obtain an effective display screen size of the display in the virtual reality terminal and obtain a target resolution of the video playback.
  • the common resolution will vary depending on the ratio (aspect ratio) displayed on the display, as detailed below:
  • the resolution is also related to video clarity.
  • the definitions are standard definition, ultra clear, high definition, broadcast TV and cinema movies. The corresponding resolution is shown in Table 2:
  • Step S2 according to the target resolution of the video playing and the effective display screen size of the display in the virtual reality terminal, the playing size of the video to be played is scaled to adapt the target resolution of the video playing to the effective display screen size.
  • step S2 the flow chart of selecting length filling or width filling according to the second embodiment of the present invention. As shown, it includes:
  • Step S201 Calculate a play size scaling ratio of the video and a play size of the scaled video relative to the effective display screen size according to the target resolution of the video play and the effective display screen size of the display in the virtual reality terminal.
  • Step S202 scaling the play size of the video to be played according to the calculated zoom ratio, and performing double-side filling in the length direction on the area on the effective display screen where no video content is played according to the calculated one-side fill amount. Or double-sided filling in the width direction.
  • FIG. 3 is a schematic flowchart of adaptively selecting a resolution as a target resolution from an alternative multiple video resolution according to Embodiment 3 of the present invention; in this embodiment, when obtaining a target resolution of video playback A video resolution is adaptively selected from the alternative multiple video resolutions as the target resolution based on the transmission speed and the available bandwidth.
  • a plurality of resolutions a/b/c may be corresponding, and a specific code rate that can be used is calculated according to the transmission speed and the available bandwidth, and one of the alternative video resolutions is selected according to the specific code rate value.
  • Video target resolution which increases or decreases the amount of data transferred. For example, if the network bandwidth is sufficient, the code rate value is large, and the video file with high resolution is used to provide more realistic virtual reality video; if the network bandwidth is decreased, the code rate value is small, and the video file with low resolution is used to reduce the data delay. Reduce discomfort such as dizziness caused by virtual reality video delay.
  • the target resolution may also be determined according to user selection, that is, the user's operation event is captured when the target resolution of the video playback is obtained in step S1, and a fixed one of the plurality of video resolutions is selected according to the captured operation event.
  • the video resolution is used as the target resolution. For example, there are multiple video target resolution options on the display interface for the user to select, and details are not described in detail.
  • the effective display screen size of the display in the virtual reality terminal is obtained in step S1
  • the effective display screen size is represented by the long and wide pixel values of the effective display screen of the display in the virtual reality terminal.
  • step S2 may include steps S401-S404 in FIG. 4, see FIG. A schematic flowchart of performing video adjustment according to Embodiment 4 of the present invention; as shown in FIG. 4, the method includes:
  • Step S402 determining a size relationship between Sw and Y;
  • step S403 is performed; if Sw is greater than Y, step S404 is performed; if Sw is equal to Y, the resolution of the video is considered to match the effective display screen size, and no scaling and filling are required;
  • Step S403 performing double-sided filling in the width direction on the area where the video content is not played on the effective display screen, and the current adjustment process ends;
  • Step S404 Perform double-side filling in the length direction on the area where the video content is not played on the effective display screen, and the current adjustment process ends.
  • FIG. 5 is a schematic structural diagram of a video multi-resolution adaptive device in a virtual reality terminal according to a fifth embodiment of the present invention, which includes: an acquisition module 501 and a video scaling module 502 coupled to each other, wherein:
  • the obtaining module 501 is configured to obtain an effective display screen size of the display in the virtual reality terminal and obtain a target resolution of the video playing;
  • the video scaling module 502 is configured to scale the play size of the video to be played according to the target resolution of the video play and the effective display screen size of the display in the virtual reality terminal to adapt the target resolution of the video play to the effective Display screen size.
  • the effective display screen size of the display in the virtual reality terminal is represented by a long and wide pixel value of the effective display screen of the display in the virtual reality terminal.
  • the acquiring module 501 is further configured to adaptively select a video resolution as the target resolution from the candidate multiple video resolutions according to the transmission speed and the available bandwidth.
  • the obtaining module 501 is further configured to capture an operation event of the user, and select a fixed video resolution from the plurality of video resolutions as the target resolution according to the captured operation event. rate.
  • the video scaling module is further used according to the Determining the target resolution of the video playback and the effective display screen size of the display in the virtual reality terminal, calculating the playback size scaling of the video and the playback size of the scaled video, and the one-side padding in the length direction relative to the effective display screen size a quantity or a one-side fill amount in the width direction; and scaling the play size of the video to be played according to the calculated zoom ratio, and playing no video content on the effective display screen according to the calculated one-side fill amount
  • the area is double-sided in the length direction or double-sided in the width direction.
  • FIG. 6 is a schematic structural diagram of a virtual reality terminal according to a sixth embodiment of the present invention.
  • the display unit 601 includes a processor 602, and the processor 602 is configured to obtain an effective display screen size of the display in the virtual reality terminal and obtain a video.
  • the target resolution of the playback, and the playback size of the video to be played is scaled according to the target resolution of the video playback and the effective display screen size of the display in the virtual reality terminal to adapt the target resolution of the video playback to the effective Display screen size.
  • the effective display screen size of the display in the virtual reality terminal is characterized by a long and wide pixel value of an effective display screen of the display in the virtual reality terminal.
  • the processor 602 is further configured to adaptively select a video resolution from the candidate multiple video resolutions as the target resolution according to the transmission speed and the available bandwidth.
  • the processor 602 is further configured to capture an operation event of the user, and select a fixed video resolution from the plurality of video resolutions as the target resolution according to the captured operation event. rate.
  • the processor 602 is further configured to calculate a scaling ratio of a play size of the video according to a target resolution of the video playing and an effective display screen size of the display in the virtual reality terminal. And a playback amount of the scaled video relative to the effective display screen size in a one-side fill amount in the length direction or a one-side fill amount in the width direction; and a playback scale of the video to be played according to the calculated zoom ratio Scaling, and one side based on calculation
  • the filling amount is a double-side filling in the longitudinal direction or a double-side filling in the width direction on the area where the video content is not played on the effective display screen.
  • the virtual reality terminal may be a virtual reality helmet or a virtual reality glasses, and the virtual reality terminal may include one display or two displays.
  • embodiments of the present invention can be provided as a method, apparatus (device), or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • a computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the instruction device implements the functions specified in one or more blocks of the flowchart or in a flow or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

Conformément à des modes de réalisation, la présente invention concerne un procédé et un appareil d'adaptation de résolution de vidéo, ainsi qu'un terminal de réalité virtuelle. Le procédé consiste : à obtenir la taille d'un écran d'affichage effectif d'un dispositif d'affichage dans un terminal de réalité virtuelle et obtenir une résolution cible d'une lecture de vidéo ; et à mettre à l'échelle la taille de lecture d'une vidéo à lire selon la résolution cible de la lecture de vidéo et la taille de l'écran d'affichage effectif du dispositif d'affichage du terminal de réalité virtuelle, de telle sorte que la résolution cible de la lecture de vidéo soit adaptée à la taille de l'écran d'affichage effectif. Les modes de réalisation de la présente invention peuvent mettre en œuvre une présentation adaptative sur les écrans de dispositifs terminaux de différentes tailles selon l'exigence de résolution de vidéo d'un utilisateur, de telle sorte que l'utilisateur obtient un effet de visualisation confortable et agréable.
PCT/CN2016/109555 2016-05-13 2016-12-13 Procédé et appareil d'adaptation de résolution de vidéo, et terminal de réalité virtuelle WO2017193576A1 (fr)

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CN201610319088.2 2016-05-13
CN201610319088.2A CN105933726A (zh) 2016-05-13 2016-05-13 虚拟现实终端及其视频分辨率的适应方法及装置

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