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    INTERACTIVE LATENCY MEASUREMENT
    25.
    发明申请
    INTERACTIVE LATENCY MEASUREMENT 有权

    公开(公告)号：US20210252394A1

    公开(公告)日：2021-08-19

    申请号：US16793282

    申请日：2020-02-18

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

    Inventor： Michael Hwang ,  Sannan Tariq ,  Christopher Rath ,  Rittwik Jana ,  Shu Shi

    IPC: A63F13/335 ,  A63F13/355

    Abstract: The described technology is generally directed towards techniques to measure interaction latency. Interaction latency can be measured at a client device by measuring time intervals between user inputs and corresponding feedback, such as video frames responsive to the user inputs. Feedback can comprise communication bursts received at the client device. The communication bursts can be detected and correlated with user inputs in order to measure interaction latency. Feedback can also comprise video response features which are responsive to the user inputs. Received video frames can be analyzed to discover response features, and video frames including the response features can be correlated with user inputs in order to measure interaction latency.

    Data-driven event detection for compressed video
    26.
    发明授权
    Data-driven event detection for compressed video 有权

    公开(公告)号：US10970555B2

    公开(公告)日：2021-04-06

    申请号：US16552443

    申请日：2019-08-27

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

    Inventor： Tarek Elgamal ,  Shu Shi ,  Varun Gupta ,  John Murray ,  Rittwik Jana

    IPC: G06K9/00 ,  G06N3/08 ,  G06K9/62 ,  H04N19/87 ,  H04N5/232 ,  H04N7/18 ,  H04N19/114

    Abstract: A system can obtain a labelled data set, including historic video data and labelled events. The system can divide the labelled data set into historic training/testing data sets. The system can determine, using the historic training data set, a plurality of different parameter configurations to be used by a video encoder to encode a video that includes a plurality of video frames. Each parameter configuration can include a group of pictures (“GOP”) size and a scenecut threshold. The system can calculate an accuracy of event detection (“ACC”) and a filtering rate (“FR”) for each parameter configuration. The system can calculate, for each parameter configuration of the plurality of different parameter configurations, a harmonic mean between the ACC and the FR. The system can then select a best parameter configuration of the plurality of different parameter configurations based upon the parameter configuration that has the highest harmonic mean.

    TRANSCODING ULTRA-HIGH-DEFINITION PANORAMIC VIDEOS
    27.
    发明申请
    TRANSCODING ULTRA-HIGH-DEFINITION PANORAMIC VIDEOS 有权

    公开(公告)号：US20210092418A1

    公开(公告)日：2021-03-25

    申请号：US16581047

    申请日：2019-09-24

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

    Inventor： Bo Han ,  Zhengye Liu ,  Shu Shi

    IPC: H04N19/40 ,  G06T3/00 ,  H04N19/597

    Abstract: In one example, a processing system including at least one processor may obtain viewport information of a mobile computing device associated with a panoramic video, map the viewport information to a plurality of blocks of a frame of the panoramic video in accordance with a cube map projection of the frame, encode the plurality of blocks into a projected frame, and transmit the projected frame to the mobile computing device. In another example, a processing system of a mobile computing device including at least one processor may obtain viewport information of the device associated with a panoramic video, transmit to a server the viewport information, obtain from the server a projected frame of the panoramic video comprising a plurality of blocks of a frame of the panoramic video that are associated with the viewport information in accordance with a cube map projection of the frame, and buffer the projected frame.

    MULTI-USER VIEWPORT-ADAPTIVE IMMERSIVE VISUAL STREAMING
    28.
    发明申请
    MULTI-USER VIEWPORT-ADAPTIVE IMMERSIVE VISUAL STREAMING 有权

    公开(公告)号：US20210092347A1

    公开(公告)日：2021-03-25

    申请号：US16581097

    申请日：2019-09-24

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

    Inventor： Bo Han ,  Shu Shi ,  Rittwik Jana

    IPC: H04N13/282 ,  H04N13/194 ,  H04N13/122

    Abstract: In one example, a processing system including at least one processor may obtain predicted viewports of a plurality of mobile computing devices for an immersive visual stream, determine at least a first tile of the immersive visual stream that is within the predicted viewports of at least two mobile computing devices of the plurality of mobile computing devices, select a first mobile computing device of the at least two mobile computing devices to transmit the first tile, and transmit to the first mobile computing device, the first tile and at least one identification of at least one other mobile computing device of the at least two mobile computing devices to which the first mobile computing device is to forward the first tile.

    METHODS, DEVICES, AND SYSTEMS FOR UPDATING STREAMING PANORAMIC VIDEO CONTENT DUE TO A CHANGE IN USER VIEWPOINT
    29.
    发明申请
    METHODS, DEVICES, AND SYSTEMS FOR UPDATING STREAMING PANORAMIC VIDEO CONTENT DUE TO A CHANGE IN USER VIEWPOINT 审中-公开

    公开(公告)号：US20200162766A1

    公开(公告)日：2020-05-21

    申请号：US16196803

    申请日：2018-11-20

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

    Inventor： Shu Shi ,  Varun Gupta ,  Rittwik Jana ,  John F. Murray ,  Michael Hwang

    IPC: H04N21/2343 ,  H04N21/442 ,  H04N21/433 ,  H04N5/232

    Abstract: Aspects of the subject disclosure may include, for example, embodiments comprising obtaining a plurality of original frames for video content, receiving a first viewpoint from a mobile device, and processing the plurality of original frames according to the first viewpoint generating a plurality of first viewpoint frames. Further embodiments include providing the plurality of first viewpoint frames to the mobile device, generating a group of delta frames in response to receiving a change in viewpoint from the mobile device, and providing the group of delta frames to the mobile device. The mobile device processes a portion of the plurality of first viewpoint frames according to the group of delta frames to generate a group of second viewpoint frames and the mobile device presents the group of second viewpoint frames. Other embodiments are disclosed.

    METHODS, DEVICES, AND SYSTEMS FOR PROVIDING PANORAMIC VIDEO CONTENT TO A MOBILE DEVICE FROM AN EDGE SERVER
    30.
    发明申请
    METHODS, DEVICES, AND SYSTEMS FOR PROVIDING PANORAMIC VIDEO CONTENT TO A MOBILE DEVICE FROM AN EDGE SERVER 审中-公开

    公开(公告)号：US20200077124A1

    公开(公告)日：2020-03-05

    申请号：US16119652

    申请日：2018-08-31

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

    Inventor： Shu Shi ,  John F. Murray ,  Michael Hwang ,  Rittwik Jana ,  Varun Gupta

    IPC: H04N21/238 ,  H04N21/414 ,  H04N21/24 ,  H04N21/222 ,  H04N21/218

    Abstract: Aspects of the subject disclosure may include, for example, embodiments for determining a first motion-to-update latency of a mobile device in relation to receiving a video content update provided by a video content server. Further embodiments include, responsive to determining that the first motion-to-update latency exceeds a threshold: determining a motion-to-update latency of the mobile device in relation to receiving video content updates from a plurality of edge servers resulting in a plurality of motion-to-update latencies, identifying a second motion-to-update latency from the plurality of motion-to-update latencies that is below the threshold, identifying an edge server associated with the second motion-to-update latency, and transmitting video content to the edge server to mitigate the first motion-to-update latency. The edge server provides a portion of the video content at different time intervals to the mobile device and the video content comprises panoramic video content. Other embodiments are disclosed.

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