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    Switching Cameras During a Video Conference of a Multi-Camera Mobile Device
    161.
    发明申请
    Switching Cameras During a Video Conference of a Multi-Camera Mobile Device 审中-公开
    在多机相机移动设备的视频会议期间切换相机

    公开(公告)号：US20130265378A1

    公开(公告)日：2013-10-10

    申请号：US13889261

    申请日：2013-05-07

    Applicant: APPLE INC.

    Inventor： Joe S. Abuan ,  David A. Eldred ,  Hyeonkuk Jeong ,  Roberto Garcia, JR. ,  Hsi-Jung Wu ,  Xiaosong Zhou ,  Elizabeth C. Cranfill ,  James O. Normile

    IPC: H04N7/14

    CPC classification number: H04N7/141 ,  G06F3/04817 ,  G06F3/04842 ,  G06F3/04886 ,  G06F9/451 ,  G09G5/14 ,  H04M1/72583 ,  H04N5/2258 ,  H04N5/2624 ,  H04N5/272 ,  H04N7/147 ,  H04N7/15

    Abstract: Some embodiments provide a method for conducting a video conference between a first mobile device and a second device. The first mobile device includes first and second cameras. The method selects the first camera for capturing images. The method transmits images captured by the first camera to the second device. The method receives selections of the second camera for capturing images during the video conference. The method terminates the transmission of images captured by the first camera and transmits images captured by the second camera of the first mobile device to the second device during the video conference.

    Abstract translation: 一些实施例提供了一种用于在第一移动设备和第二设备之间进行视频会议的方法。 第一移动设备包括第一和第二相机。 该方法选择用于捕获图像的第一相机。 该方法将由第一相机拍摄的图像发送到第二设备。 该方法在视频会议期间接收用于捕获图像的第二相机的选择。 该方法终止由第一相机拍摄的图像的传输，并且在视频会议期间将由第一移动设备的第二相机拍摄的图像发送到第二设备。

    Content adaptation for streaming
    164.
    发明授权
    Content adaptation for streaming 有权

    公开(公告)号：US12149699B2

    公开(公告)日：2024-11-19

    申请号：US17492789

    申请日：2021-10-04

    Applicant: Apple Inc.

    Inventor： Yeping Su ,  Xingyu Zhang ,  Chris Chung ,  Jun Xin ,  Hsi-Jung Wu

    IPC: H04N19/136 ,  G06N20/00 ,  H04N19/103 ,  H04N19/179 ,  H04N21/2343 ,  H04N21/845

    Abstract: Techniques are disclosed by which a coding parameter is determined to encode video data resulting in encoded video data possessing a highest possible video quality. Features may be extracted from an input video sequence. The extracted features may be compared to features described in a model of coding parameters generated by a machine learning algorithm from reviews of previously-coded videos, extracted features of the previously-coded videos, and coding parameters of the previously-coded videos. When a match is detected between the extracted features of the input video sequence and extracted features represented in the model, a determination may be made as to whether coding parameters that correspond to the matching extracted feature correspond to a tier of service to which the input video sequence is to be coded. When the coding parameters that correspond to the matching extracted feature correspond to the tier of service to which the input video sequence is to be coded, the input video sequence may be coded according to the coding parameters.

    JOINT MOTION VECTOR CODING
    165.
    发明公开
    JOINT MOTION VECTOR CODING 审中-公开

    公开(公告)号：US20240195978A1

    公开(公告)日：2024-06-13

    申请号：US18065220

    申请日：2022-12-13

    Applicant: Apple Inc.

    Inventor： Yeqing WU ,  Yunfei Zheng ,  Alexandros Tourapis ,  Yixin Du ,  Alican Nalci ,  Hilmi E. Egilmez ,  Guoxin Jin ,  Jun Xin ,  Hsi-Jung Wu

    IPC: H04N19/137 ,  H04N19/105 ,  H04N19/172 ,  H04N19/176

    CPC classification number: H04N19/137 ,  H04N19/105 ,  H04N19/172 ,  H04N19/176

    Abstract: The present disclosure describes techniques for efficient coding of motion vectors developed for multi-hypothesis coding applications. According to these techniques, when coding hypotheses are developed, each having a motion vector identifying a source of prediction for a current pixel block, a motion vector for a first one of the coding hypotheses may be predicted from the motion vector of a second coding hypothesis. The first motion vector may be represented by coding a motion vector residual, which represents a difference between the developed motion vector for the first coding hypothesis and the predicted motion vector for the first coding hypothesis, and outputting the coded residual to a channel. In another embodiment, a motion vector residual may be generated for a motion vector of a first coding hypothesis, and the first motion vector and the motion vector residual may be used to predict a second motion vector and a predicted motion vector residual. The second hypothesis's motion vector may be coded as a difference between the motion vector, the predicted second motion vector, and the predicted motion vector residual. In a further embodiment, a single motion vector residual may be output for the motion vectors of two coding hypotheses representing a difference between the motion vector of one of the hypotheses and a predicted motion vector for that hypothesis.

    Immersive video streaming using view-adaptive prefetching and buffer control
    169.
    发明授权
    Immersive video streaming using view-adaptive prefetching and buffer control 有权

    公开(公告)号：US11570417B2

    公开(公告)日：2023-01-31

    申请号：US17326204

    申请日：2021-05-20

    Applicant: Apple Inc.

    Inventor： Fanyi Duanmu ,  Jun Xin ,  Hsi-Jung Wu ,  Xiaosong Zhou

    IPC: H04N13/00 ,  H04N21/24 ,  H04N21/218 ,  H04N13/117 ,  H04N13/178

    Abstract: A system obtains a data set representing immersive video content for display at a display time, including first data representing the content according to a first level of detail, and second data representing the content according to a second higher level of detail. During one or more first times prior to the display time, the system causes at least a portion of the first data to be stored in a buffer. During one or more second times prior to the display time, the system generates a prediction of a viewport for displaying the content to a user at the display time, identifies a portion of the second data corresponding to the prediction of the viewport, and causes the identified portion of the second data to be stored in the video buffer. At the display time, the system causes the content to be displayed to the user using the video buffer.

    Techniques of multi-hypothesis motion compensation
    170.
    发明授权
    Techniques of multi-hypothesis motion compensation 有权

    公开(公告)号：US11463707B2

    公开(公告)日：2022-10-04

    申请号：US16879007

    申请日：2020-05-20

    Applicant: Apple Inc.

    Inventor： Alexandros Michael Tourapis ,  Yeping Su ,  David Singer ,  Hsi-Jung Wu

    IPC: H04N19/159 ,  H04N19/105 ,  H04N19/70 ,  H04N19/176 ,  H04N19/567 ,  H04N19/147 ,  H04N19/109 ,  H04N19/513

    Abstract: The present disclosure describes techniques for coding and decoding video in which a plurality of coding hypotheses are developed for an input pixel block of frame content. Each coding hypothesis may include generation of prediction data for the input pixel block according to a respective prediction search. The input pixel block may be coded with reference to a prediction block formed from prediction data derived according to plurality of hypotheses. Data of the coded pixel block may be transmitted to a decoder along with data identifying a number of the hypotheses used during the coding to a channel. At a decoder, an inverse process may be performed, which may include generation of a counterpart prediction block from prediction data derived according to the hypothesis identified with the coded pixel block data, then decoding of the coded pixel block according to the prediction data.

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