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    Signaling of simplified depth coding (SDC) for depth intra- and inter-prediction modes in 3D video coding
    231.
    发明授权
    Signaling of simplified depth coding (SDC) for depth intra- and inter-prediction modes in 3D video coding 有权

    公开(公告)号：US11039129B2

    公开(公告)日：2021-06-15

    申请号：US15895815

    申请日：2018-02-13

    Applicant: QUALCOMM Incorporated

    Inventor： Li Zhang ,  Hongbin Liu ,  Ying Chen

    IPC: H04N19/107 ,  H04N19/597 ,  H04N19/70 ,  H04N19/463 ,  H04N19/159 ,  H04N19/182 ,  H04N19/91 ,  H04N7/12

    Abstract: This disclosure describes techniques for signaling and processing information indicating simplified depth coding (SDC) for depth intra-prediction and depth inter-prediction modes in a 3D video coding process, such as a process defined by the 3D-HEVC extension to HEVC. In some examples, the disclosure describes techniques for unifying the signaling of SDC for depth intra-prediction and depth inter-prediction modes in 3D video coding. The signaling of SDC can be unified so that a video encoder or video decoder uses the same syntax element for signaling SDC for both the depth intra-prediction mode and the depth inter-prediction mode. Also, in some examples, a video coder may signal and/or process a residual value generated in the SDC mode using the same syntax structure, or same type of syntax structure, for both the depth intra-prediction mode and depth inter-prediction mode.

    Modified adaptive loop filter temporal prediction for temporal scalability support
    233.
    发明授权
    Modified adaptive loop filter temporal prediction for temporal scalability support 有权

    公开(公告)号：US10855985B2

    公开(公告)日：2020-12-01

    申请号：US16671499

    申请日：2019-11-01

    Applicant: QUALCOMM Incorporated

    Inventor： Li Zhang ,  Wei-Jung Chien ,  Marta Karczewicz ,  Ye-Kui Wang

    IPC: H04N7/18 ,  H04N19/117 ,  H04N19/80 ,  H04N19/82 ,  H04N19/463 ,  H04N19/31 ,  H04N19/70 ,  H04N19/17

    Abstract: A video coder may reconstruct a current picture of video data. A current region of the current picture is associated with a temporal index indicating a temporal layer to which the current region belongs. Furthermore, for each respective array of a plurality of arrays that correspond to different temporal layers, the video coder may store, in the respective array, sets of adaptive loop filtering (ALF) parameters used in applying ALF filters to samples of regions of pictures of the video data that are decoded prior to the current region and that are in the temporal layer corresponding to the respective array or a lower temporal layer than the temporal layer corresponding to the respective array. The video coder determines, based on a selected set of ALF parameters in the array corresponding to the temporal layer to which the current region belongs, an applicable set of ALF parameters.

    LOW-COMPLEXITY DESIGN FOR FRUC
    234.
    发明申请
    LOW-COMPLEXITY DESIGN FOR FRUC 审中-公开

    公开(公告)号：US20200221110A1

    公开(公告)日：2020-07-09

    申请号：US16820152

    申请日：2020-03-16

    Applicant: QUALCOMM Incorporated

    Inventor： Wei-Jung Chien ,  Hsiao-Chiang Chuang ,  Xiang Li ,  Jianle Chen ,  Li Zhang ,  Marta Karczewicz

    IPC: H04N19/44 ,  H04N19/513 ,  H04N19/577 ,  H04N19/573 ,  H04N19/176 ,  H04N19/523 ,  H04N19/56 ,  H04N19/52

    Abstract: A method of decoding video data includes constructing, by a video decoder implemented in processing circuitry, a candidate list of motion vector information for a portion of a current frame. The method includes receiving, by the video decoder, signaling information indicating starting motion vector information of the candidate list of motion vector information, the starting motion vector information indicating an initial position in a reference frame. The method includes refining, by the video decoder, based on one or more of bilateral matching or template matching, the starting motion vector information to determine refined motion vector information indicating a refined position in the reference frame that is within a search range from the initial position. The method includes generating, by the video decoder, a predictive block based on the refined motion vector information and decoding, by the video decoder, the current frame based on the predictive block.

    Deblocking filter for video coding and processing
    235.
    发明授权
    Deblocking filter for video coding and processing 有权

    公开(公告)号：US10708592B2

    公开(公告)日：2020-07-07

    申请号：US16372180

    申请日：2019-04-01

    Applicant: QUALCOMM Incorporated

    Inventor： Jie Dong ,  Yung-Hsuan Chao ,  Wei-Jung Chien ,  Marta Karczewicz ,  Li Zhang

    IPC: H04N19/117 ,  H04N19/176 ,  G06K9/62 ,  H04N19/159

    Abstract: Deblocking is a step in video coding for removing distortions that may result from dividing a video frame into blocks, and encoding the video frame based on the blocks. Techniques described herein can include determining the activity in neighboring blocks along the boundary of the blocks, where the activity measures smoothness or complexity of pixels in the boundary area. An average of the activity can then be determined, as well a difference in the activity between the left block and the right block. The average activity and the difference in activity can then be used to determine a classification for the boundary area. The classification can further be used to select a filter to apply to the pixels in the boundary area. Once the filter have been applied, the blocks can be added to a reconstructed video frame.

    Merge candidates for motion vector prediction for video coding
    239.
    发明授权
    Merge candidates for motion vector prediction for video coding 有权

    公开(公告)号：US10560718B2

    公开(公告)日：2020-02-11

    申请号：US15591813

    申请日：2017-05-10

    Applicant: QUALCOMM Incorporated

    Inventor： Sungwon Lee ,  Wei-Jung Chien ,  Li Zhang ,  Marta Karczewicz

    IPC: H04N19/56 ,  H04N19/122 ,  H04N19/176

    Abstract: A method of decoding video data includes constructing a motion vector candidate list of merge candidates for the current block of video data based on motion information from a number of neighboring blocks relative to the current block, wherein the number of neighboring blocks considered for the motion vector candidate list is based on the size of the current block, and wherein the number of neighboring blocks is greater than 5. In some examples, the method includes deriving a histogram of motion vector information for the neighboring blocks, and constructing the motion vector candidate list based on the derived histogram.

    Implicit coding of reference line index used in intra prediction
    240.
    发明授权
    Implicit coding of reference line index used in intra prediction 有权

    公开(公告)号：US10484712B2

    公开(公告)日：2019-11-19

    申请号：US15616853

    申请日：2017-06-07

    Applicant: QUALCOMM Incorporated

    Inventor： Li Zhang ,  Xiang Li ,  Wei-Jung Chien ,  Jianle Chen ,  Xin Zhao ,  Marta Karczewicz

    IPC: H04N19/587 ,  H04N19/593 ,  H04N19/159 ,  H04N19/176 ,  H04N19/186 ,  H04N19/44

    Abstract: A device for decoding video data determines that a current block of video data is coded using a linear model prediction mode; for the luma component of the current block, determines reconstructed luma samples; based on luma samples in a luma component of one or more already decoded neighboring blocks and chroma samples in a chroma component of the one or more already decoded neighboring blocks, determines values for linear parameters, wherein the luma samples in the luma component of the one or more already decoded neighboring blocks comprise luma samples from a starting line in the luma component of the one or more already decoded neighboring blocks, wherein the starting line in the luma component of the one or more already decoded neighboring blocks is at least one line removed from a border line of the luma component of the current block.

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