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    SPATIAL-TEMPORAL MOTION VECTOR PREDICTION
    2.
    发明申请
    SPATIAL-TEMPORAL MOTION VECTOR PREDICTION 审中-公开

    公开(公告)号：WO2021129685A1

    公开(公告)日：2021-07-01

    申请号：PCT/CN2020/138701

    申请日：2020-12-23

    Applicant: BEIJING BYTEDANCE NETWORK TECHNOLOGY CO., LTD. ,  BYTEDANCE INC.

    Inventor： ZHANG, Na ,  LIU, Hongbin ,  ZHANG, Li ,  ZHANG, Kai ,  WANG, Yue

    IPC: H04N19/17 ,  H04N19/50 ,  H04N19/517

    Abstract: Spatial-temporal motion vector prediction is described. One example method of video processing includes constructing, for a conversion between a current block of a video and a bitstream of the video, a merge candidate list for the current block, wherein a spatial-temporal motion vector prediction (STMVP) candidate associated with the current block are added to the merge candidate list, and the STMVP candidate is derived as an averaging candidate of M spatial neighboring motion candidates and/or N temporal neighboring motion candidates, M and N being positive integers; and performing the conversion based on the merge candidate list.

    INTER PREDICTION MEMORY ACCESS BANDWIDTH REDUCTION METHOD WITH OPTICAL FLOW COMPENSATION
    3.
    发明申请
    INTER PREDICTION MEMORY ACCESS BANDWIDTH REDUCTION METHOD WITH OPTICAL FLOW COMPENSATION 审中-公开

    公开(公告)号：WO2020190853A1

    公开(公告)日：2020-09-24

    申请号：PCT/US2020/022945

    申请日：2020-03-16

    Applicant: VID SCALE, INC.

    Inventor： LUO, Jiancong ,  HE, Yuwen ,  CHEN, Wei

    IPC: H04N19/517 ,  H04N19/523

    Abstract: Systems and methods are described for video coding. In some embodiments, inter prediction of a sample in a current block is performed by rounding an initial motion vector and determining a rounding error vector caused by the rounding. An unrefined prediction of the sample is generated using the rounded motion vector. Unrefined predictions are similarly generated for other samples in the current block. Based on the unrefined predictions, a spatial gradient is determined for each sample position in the block. A refined prediction is generated for each sample position by adding, to the unrefined prediction, a scalar product between the spatial gradient and the rounding error vector at the sample position. Example methods can reduce the number of reference pixels used to predict a current block and thus may reduce memory access bandwidth.

    视频图像预测方法及装置
    4.
    发明申请
    视频图像预测方法及装置 审中-公开

    公开(公告)号：WO2020181476A1

    公开(公告)日：2020-09-17

    申请号：PCT/CN2019/077726

    申请日：2019-03-11

    Applicant: 华为技术有限公司

    Inventor： 陈旭 ,  郑建铧

    IPC: H04N19/513 ,  H04N19/517

    Abstract: 本申请提供一种视频图像预测方法及装置，用以一定程度上解决现有技术中存在的预测准确度较低的问题。本申请实施例中采用MMVD方式结合运动矢量精细化的方法(即基于MMVD的DMVR方法)进行帧间预测，针对MMVD存在双向预测过程的情况，对双向预测过程进行优化实现后再结合MVD信息进行解码，这样的话，可以充分利用第一参考图像与第二参考图像之间(即前后向预测图像间)的匹配关系，较传统的方法来说，一定程度上降低了冗余，从而预测准确度相对得以提高。

    解码方法、编码方法、装置、设备及存储介质
    7.
    发明申请
    解码方法、编码方法、装置、设备及存储介质 审中-公开

    公开(公告)号：WO2022194103A1

    公开(公告)日：2022-09-22

    申请号：PCT/CN2022/080697

    申请日：2022-03-14

    Applicant: 杭州海康威视数字技术股份有限公司

    Inventor： 曹小强 ,  孙煜程 ,  陈方栋

    IPC: H04N19/517

    Abstract: 本申请提供一种解码方法、编码方法、装置、设备及存储介质。该解码方法包括：获取当前编码单元的增强时域运动矢量预测模式标志位的取值和增强时域运动矢量预测模式索引值；当所述增强时域运动矢量预测模式标志位的取值为第一数值时：根据所述当前编码单元的坐标信息，确定所述当前编码单元的初始匹配编码单元的坐标信息；根据所述初始匹配编码单元的坐标信息，构建增强时域候选列表；根据所述增强时域运动矢量预测模式索引值，确定目标匹配编码单元的坐标信息；根据所述目标匹配编码单元的坐标信息，确定所述当前编码单元内对应位置的子块的运动信息。该方法可以提高编解码性能。

    SIGNALING OF SUBPICTURE LEVEL AND BUFFERING INFORMATION
    8.
    发明申请
    SIGNALING OF SUBPICTURE LEVEL AND BUFFERING INFORMATION 审中-公开

    公开(公告)号：WO2021252546A1

    公开(公告)日：2021-12-16

    申请号：PCT/US2021/036491

    申请日：2021-06-08

    Applicant: BYTEDANCE INC.

    Inventor： WANG, Ye-kui

    IPC: H04N19/46 ,  H04N19/52 ,  H04N19/517 ,  H04N19/70 ,  H04N19/31 ,  H04N19/33 ,  H04N19/174 ,  H04N19/119 ,  H04L29/06 ,  H04N13/00 ,  H04N19/30 ,  H04N19/433

    Abstract: Examples of video encoding methods and apparatus and video decoding methods and apparatus are described. An example method of video processing includes performing a conversion between a video and a bitstream of the video, wherein the bitstream comprises one or more output layer sets comprising one or more video layers according to a rule, wherein the rule specifies a particular decoding order between a subpicture level information (SLI) supplemental enhancement information (SEI) message and a buffering period (BP) SEI message that apply to a particular output layer set, responsive to a condition that the SLI SEI message and the BP SEI message are included in an access unit.

    EXTENDED MOTION INFORMATION COMPARISON
    10.
    发明申请
    EXTENDED MOTION INFORMATION COMPARISON 审中-公开

    公开(公告)号：WO2021058498A1

    公开(公告)日：2021-04-01

    申请号：PCT/EP2020/076460

    申请日：2020-09-23

    Applicant: INTERDIGITAL VC HOLDINGS FRANCE, SAS

    Inventor： ROBERT, Antoine ,  LELEANNEC, Fabrice ,  BORDES, Philippe ,  POIRIER, Tangi

    IPC: H04N19/517 ,  H04N19/52 ,  H04N19/523

    Abstract: In some coding modes, such as the merge mode, a list of motion candidates is generated using spatial or temporal neighboring blocks or constructed ones, and one of the motion candidates is inherited by the current block. When constructing the list of motion candidates, motion information of a candidate to be added is checked to limit the redundancy in the constructed list. In one implementation, the switchable interpolation filter, the IFindex becomes part of the motion information to be used in comparison since it can modify the resulting prediction. Furthermore, the GBiIdx indicating the weights used in bi-prediction can also be part of the motion information to be compared and could also be taken into account in the redundancy check. In general, all or part of motion information that causes different prediction can be used in redundancy check.

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