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    Interaction between IBC and ATMVP
    181.
    发明授权
    Interaction between IBC and ATMVP 有权

    公开(公告)号：US11051031B2

    公开(公告)日：2021-06-29

    申请号：US17011131

    申请日：2020-09-03

    Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

    Inventor： Kai Zhang ,  Li Zhang ,  Hongbin Liu ,  Yue Wang

    IPC: H04N19/107 ,  H04N19/176 ,  H04N19/105 ,  H04N19/117 ,  H04N19/583 ,  H04N19/132 ,  H04N19/139 ,  H04N19/159 ,  H04N19/167 ,  H04N19/119

    Abstract: Devices, systems and methods for applying intra-block copy (IBC) in video coding are described. In general, methods for integrating IBC with existing motion compensation algorithms for video encoding and decoding are described. In a representative aspect, a method for video encoding using IBC includes determining whether a current block of the current picture is to be encoded using a motion compensation algorithm, and encoding, based on the determining, the current block by selectively applying an intra-block copy to the current block. In a representative aspect, another method for video encoding using IBC includes determining whether a current block of the current picture is to be encoded using an intra-block copy, and encoding, based on the determining, the current block by selectively applying a motion compensation algorithm to the current block.

    CLIPPING OF UPDATED MV OR DERIVED MV
    183.
    发明申请
    CLIPPING OF UPDATED MV OR DERIVED MV 有权

    公开(公告)号：US20210067783A1

    公开(公告)日：2021-03-04

    申请号：US17098962

    申请日：2020-11-16

    Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

    Inventor： Hongbin Liu ,  Li Zhang ,  Kai Zhang ,  Yue Wang

    IPC: H04N19/137 ,  H04N19/105 ,  H04N19/132 ,  H04N19/176

    Abstract: Devices, systems and methods for digital video coding, which includes motion prediction based on updated motion vectors generated using two-step inter-prediction, are described. Methods for clipping of updated MV or derived MV are described. An exemplary method for video coding includes: determining original motion information for a current block; updating original motion vectors of the original motion information for the current block based on a refining method; clipping the updated motion vectors to be within a range; and performing a conversion between the current block and a bitstream representation of a video including the current block, based on the clipped updated motion vectors.

    Coding of block vectors for intra block copy-coded blocks
    186.
    发明授权
    Coding of block vectors for intra block copy-coded blocks 有权

    公开(公告)号：US12219167B2

    公开(公告)日：2025-02-04

    申请号：US18158280

    申请日：2023-01-23

    Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

    Inventor： Li Zhang ,  Jizheng Xu ,  Kai Zhang ,  Hongbin Liu

    IPC: H04N19/52 ,  H04N19/105 ,  H04N19/139 ,  H04N19/159 ,  H04N19/176 ,  H04N19/70

    Abstract: Methods, devices and systems for intra-block coding based decoding or encoding of video while using block vector signaling and/or merge candidates are disclosed. An example method for video processing includes performing a conversion between a video region of a video and a bitstream representation of the video, wherein the bitstream representation selectively includes motion vector difference (MVD) related syntax elements for an intra block copy (IBC) advanced motion vector prediction (AMVP) mode based on a maximum number of a first type of IBC candidates used during the conversion of the video region, wherein, when an IBC mode is applied, samples of the video region are predicted from other samples in a video picture corresponding to the video region.

    Multi-HMVP for affine
    188.
    发明授权
    Multi-HMVP for affine 有权

    公开(公告)号：US12200244B2

    公开(公告)日：2025-01-14

    申请号：US17380310

    申请日：2021-07-20

    Applicant: Beijing Bytedance Network Technology Co., Ltd. ,  Bytedance Inc.

    Inventor： Kai Zhang ,  Li Zhang ,  Hongbin Liu ,  Jizheng Xu ,  Yue Wang

    IPC: H04N19/52 ,  H04N19/105 ,  H04N19/176 ,  H04N19/423

    Abstract: Multi-HMVP for affine is described. In an exemplary aspect, a method for video processing includes deriving, for a conversion between a current block of video and a bitstream representation of the current block, an affine model for the current block based on affine related information stored in at least one history motion vector prediction (HMVP) buffer of multiple HMVP buffers, the multiple HMVP buffers being used to store affine related information of blocks coded prior the current block in different categories; and performing the conversion by using the derived affine model.

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