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    MODIFIED ADAPTIVE LOOP FILTER TEMPORAL PREDICTION FOR TEMPORAL SCALABILITY SUPPORT
    71.
    发明申请
    MODIFIED ADAPTIVE LOOP FILTER TEMPORAL PREDICTION FOR TEMPORAL SCALABILITY SUPPORT 审中-公开

    公开(公告)号：US20180192050A1

    公开(公告)日：2018-07-05

    申请号：US15861165

    申请日：2018-01-03

    Applicant: QUALCOMM Incorporated

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

    IPC: H04N19/117 ,  H04N19/80

    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.

    MOTION VECTOR PREDICTION FOR AFFINE MOTION MODELS IN VIDEO CODING
    75.
    发明申请
    MOTION VECTOR PREDICTION FOR AFFINE MOTION MODELS IN VIDEO CODING 审中-公开

    公开(公告)号：US20180098063A1

    公开(公告)日：2018-04-05

    申请号：US15725052

    申请日：2017-10-04

    Applicant: QUALCOMM Incorporated

    Inventor： Yi-Wen Chen ,  Wei-Jung Chien ,  Li Zhang ,  Yu-Chen Sun ,  Jianle Chen ,  Marta Karczewicz

    IPC: H04N19/105 ,  H04N19/139 ,  H04N19/176

    CPC classification number: H04N19/105 ,  H04N19/139 ,  H04N19/176 ,  H04N19/52 ,  H04N19/537

    Abstract: A video decoder selects a source affine block. The source affine block is an affine-coded block that spatially neighbors a current block. Additionally, the video decoder extrapolates motion vectors of control points of the source affine block to determine motion vector predictors for control points of the current block. The video decoder inserts, into an affine motion vector predictor (MVP) set candidate list, an affine MVP set that includes the motion vector predictors for the control points of the current block. The video decoder also determines, based on an index signaled in a bitstream, a selected affine MVP set in the affine MVP set candidate list. The video decoder obtains, from the bitstream, motion vector differences (MVDs) that indicate differences between motion vectors of the control points of the current block and motion vector predictors in the selected affine MVP set.

    Two level last significant coefficient (LSC) position coding
    78.
    发明授权
    Two level last significant coefficient (LSC) position coding 有权
    两级最后有效系数（LSC）位置编码

    公开(公告)号：US09445132B2

    公开(公告)日：2016-09-13

    申请号：US14021589

    申请日：2013-09-09

    Applicant: QUALCOMM Incorporated

    Inventor： Liwei Guo ,  Marta Karczewicz ,  Joel Sole Rojals ,  Wei-Jung Chien ,  Rajan Laxman Joshi

    IPC: G06K9/72 ,  H04N19/91 ,  H04N19/60 ,  H04N19/13 ,  H04N19/129 ,  H04N19/18

    CPC classification number: H04N19/91 ,  H04N19/129 ,  H04N19/13 ,  H04N19/18 ,  H04N19/60

    Abstract: In some examples, a video coder employs a two-level technique to code information that identifies a position within the block of transform coefficients of one of the coefficients that is a last significant coefficient (LSC) for the block according to a scanning order associated with the block of transform coefficients. For example, a video coder may code a sub-block position that identifies a position of one of the sub-blocks that includes the LSC within the block, and code a coefficient position that identifies a position of the LSC within the sub-block that includes the LSC.

    Abstract translation: 在一些示例中，视频编码器采用两级技术来编码信息，该信息根据与该数据块相关联的扫描顺序来识别作为该块的最后有效系数（LSC）的一个系数的变换系数块内的位置 变换系数块。 例如，视频编码器可以对在块内标识包括LSC的子块之一的位置的子块位置进行编码，并对识别子块内的LSC的位置的系数位置进行编码， 包括LSC。

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