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    Proxy Assisted Panoramic Video Streaming at Mobile Edge
    1.
    发明申请
    Proxy Assisted Panoramic Video Streaming at Mobile Edge 有权

    公开(公告)号：US20220353557A1

    公开(公告)日：2022-11-03

    申请号：US17859107

    申请日：2022-07-07

    Applicant: AT&T Intellectual Property I, L.P.

    Inventor： Bo Han ,  Vijay Gopalakrishnan ,  Rittwik Jana

    IPC: H04N21/231 ,  H04N21/222 ,  H04N21/234 ,  H04N21/258 ,  H04N21/218

    Abstract: Aspects of the subject disclosure may include, for example, system for tile-based video streaming using a proxy executing at a mobile edge cloud, which adaptively offloads decoding and merging of video tiles from mobile devices to the mobile edge cloud. A processing system including the proxy communicates with a video server and a client device. The proxy receives a request for video content from a client device; the request includes historical field of view (FoV) information. The proxy predicts a client FoV, requests video tiles from the server, downloads the tiles from the server, generates a video chunk by decoding and merging the downloaded tiles, and delivers the video chunk to the client device. The client device performs local decoding and rendering of the generated video chunk. Other embodiments are disclosed.

    VIEWPORT-BASED TRANSCODING FOR IMMERSIVE VISUAL STREAMS
    2.
    发明申请
    VIEWPORT-BASED TRANSCODING FOR IMMERSIVE VISUAL STREAMS 有权

    公开(公告)号：US20220337831A1

    公开(公告)日：2022-10-20

    申请号：US17810636

    申请日：2022-07-04

    Applicant: AT&T Intellectual Property I, L.P.

    Inventor： Bo Han ,  Tan Xu ,  Zhengye Liu

    IPC: H04N19/119 ,  H04N19/20 ,  H04N19/597 ,  G06N20/00 ,  H04N19/176 ,  G06N5/04 ,  H04N19/162

    Abstract: In one example, a processing system including at least one processor may obtain a predicted viewport of a mobile computing device for an immersive visual stream, identify a first plurality of blocks of a frame of the immersive visual stream that are associated with the predicted viewport, encode the first plurality of blocks at a first encoding quality level, and encode a second plurality of blocks of the frame at a second encoding quality level, where the second encoding quality level is associated with a lesser visual quality as compared to the first encoding quality level and where the second plurality of blocks are outside of the predicted viewport. The processing system may then transmit the frame having the first plurality of blocks encoded at the first encoding quality level and the second plurality of blocks encoded at the second encoding quality level to the mobile computing device.

    Adaptive field of view prediction
    3.
    发明授权
    Adaptive field of view prediction 有权

    公开(公告)号：US11470360B2

    公开(公告)日：2022-10-11

    申请号：US17301719

    申请日：2021-04-12

    Applicant: AT&T Intellectual Property I, L.P.

    Inventor： Bo Han ,  Vijay Gopalakrishnan ,  Tan Xu

    IPC: H04N21/218 ,  G06F3/01 ,  G06F3/04815 ,  H04N19/597 ,  G06N20/20 ,  H04N19/17

    Abstract: A method for streaming a 360 degree video over a communications network, wherein the video is streamed in a plurality of chunks, includes selecting a prediction window during which to predict a field of view within the video, the field of view is expected to be visible by a viewer at a time of playback of a next chunk of the video, wherein a duration of the prediction window is based on at least one condition within the communications network, selecting a machine learning algorithm to predict the field of view based on a head movement of the viewer, wherein the machine learning algorithm is selected based on the duration of the prediction window, predicting the field of view based on the head movement of the viewer and the machine learning algorithm, identifying a tile of the next chunk that corresponds to the field of view, and downloading the tile.

    EXTENDED REALITY ANCHOR CACHING BASED ON VIEWPORT PREDICTION
    4.
    发明申请
    EXTENDED REALITY ANCHOR CACHING BASED ON VIEWPORT PREDICTION 有权

    公开(公告)号：US20220254113A1

    公开(公告)日：2022-08-11

    申请号：US17660620

    申请日：2022-04-25

    Applicant: AT&T Intellectual Property I, L.P.

    Inventor： Tan Xu ,  David Crawford Gibbon ,  Bo Han ,  Eric Zavesky

    IPC: G06T19/00 ,  G06F3/01 ,  G02B27/01 ,  G06V20/20

    Abstract: A processing system of a mobile device may determine the device's predicted viewport, which defines a portion of a real world environment that is expected to be visible to the device's user at a future time. The processing system may determine a set of extended reality anchors that are present in the real world environment, where each anchor stores a digital object that, when rendered by the device and presented to the user simultaneously with the real world environment, creates extended reality media. The processing system may remove a first subset anchors from the set, where locations of anchors in the first subset fall outside a threshold distance from the predicted viewport. The removing results in a second subset of anchors remaining in the set. The processing system may download a digital object from a second device, where the digital object is stored by an anchor of the second subset.

    Viewport-based transcoding for immersive visual streams
    5.
    发明授权
    Viewport-based transcoding for immersive visual streams 有权

    公开(公告)号：US11381817B2

    公开(公告)日：2022-07-05

    申请号：US16580903

    申请日：2019-09-24

    Applicant: AT&T Intellectual Property I, L.P.

    Inventor： Bo Han ,  Tan Xu ,  Zhengye Liu

    IPC: H04N19/597 ,  H04N19/167 ,  H04N19/119 ,  H04N19/20 ,  G06N20/00 ,  H04N19/176 ,  G06N5/04 ,  H04N19/162

    Abstract: In one example, a processing system including at least one processor may obtain a predicted viewport of a mobile computing device for an immersive visual stream, identify a first plurality of blocks of a frame of the immersive visual stream that are associated with the predicted viewport, encode the first plurality of blocks at a first encoding quality level, and encode a second plurality of blocks of the frame at a second encoding quality level, where the second encoding quality level is associated with a lesser visual quality as compared to the first encoding quality level and where the second plurality of blocks are outside of the predicted viewport. The processing system may then transmit the frame having the first plurality of blocks encoded at the first encoding quality level and the second plurality of blocks encoded at the second encoding quality level to the mobile computing device.

    System and method of enabling adaptive bitrate streaming for volumetric videos
    10.
    发明授权
    System and method of enabling adaptive bitrate streaming for volumetric videos 有权

    公开(公告)号：US11190771B2

    公开(公告)日：2021-11-30

    申请号：US16820080

    申请日：2020-03-16

    Applicant: AT&T Intellectual Property I, L.P.

    Inventor： Bo Han ,  Cheuk Yiu Ip ,  Jackson Jarrell Pair

    IPC: H04N19/132 ,  H04N19/184 ,  H04N19/30 ,  H04N19/146

    Abstract: Aspects of the subject disclosure may include, for example, a device that has a processing system including a processor; and a memory that stores executable instructions that, when executed by the processing system, facilitate performance of operations including selecting a downsampling technique for removing points from a point cloud in a volumetric video; selecting a data reduction percentage for a target bitrate for streaming the volumetric video; downsampling the point cloud in each frame of the volumetric video for the target bitrate using the downsampling technique and data reduction percentage selected, thereby creating a downsampled volumetric video; and compressing and encoding the downsampled volumetric video, thereby creating an encoded volumetric video. Other embodiments are disclosed.

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