公开(公告)号：US11323707B2

公开(公告)日：2022-05-03

申请号：US17107318

申请日：2020-11-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Han Gao ,  Zhijie Zhao ,  Semih Esenlik ,  Anand Meher Kotra ,  Jianle Chen

IPC: H04N19/119 ,  H04N19/176 ,  H04N19/184 ,  H04N19/96

Abstract: The present disclosure provides apparatuses and methods for splitting an image into coding units. An image is divided into coding tree units (CTUs) which are hierarchically partitioned. Hierarchical partitioning includes multi-type partitioning such as binary tree or quad tree splitting. For CTUs completely within the image and CTUs on the boundary, respective multi-type partition depths are chosen. The present disclosure provides for multi-type partitioning flexibility in a boundary portion of the image.

公开(公告)号：US11303902B2

公开(公告)日：2022-04-12

申请号：US17074635

申请日：2020-10-20

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Semih Esenlik ,  Anand Meher Kotra ,  Zhijie Zhao ,  Jianle Chen

IPC: H04N19/139 ,  H04N19/132 ,  H04N19/152 ,  H04N19/167 ,  H04N19/176 ,  H04N19/96

Abstract: The present disclosure relates to apparatuses and methods for determination of motion parameters (e.g. motion vectors) for motion prediction of a coding block, and is applicable to video encoding and/or decoding. The motion parameter is selected from motion parameters, which include motion parameters associated with a set of respective image samples not included in the coding tree unit, where the set of image samples are located at a predetermined position relative to an extended boundary of the coding tree unit. The apparatuses and methods of the present disclosure may facilitate reducing on-chip buffer requirements for motion prediction.

公开(公告)号：US20220078442A1

公开(公告)日：2022-03-10

申请号：US17478697

申请日：2021-09-17

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Huanbang Chen ,  Haitao Yang ,  Jianle Chen

IPC: H04N19/139 ,  H04N19/176 ,  H04N19/174 ,  H04N19/172 ,  H04N19/119 ,  H04N19/52

Abstract: The present disclosure relates to an apparatus, an encoder, a decoder and corresponding methods for prediction refinement with optical flow (PROF) for an affine coded block, in which when a plurality of optical flow decision conditions are fulfilled for the affine coded block, performing a PROF process for a current sub-block of the affine coded block to obtain refined prediction sample values of the current sub-block of the affine coded block. After the sub-block based affine motion compensation is performed, a prediction sample value of the current sample of the current sub-block is refined by adding a delta prediction value. Thus, it allows for a better trade-off between coding complexity and prediction accuracy.

公开(公告)号：US20220014732A1

公开(公告)日：2022-01-13

申请号：US17478243

申请日：2021-09-17

Applicant: Huawei Technologies Co., Ltd.

Inventor： Alexey Konstantinovich Filippov ,  Vasily Alexeevich Rufitskiy ,  Jianle Chen ,  Semih Esenlik ,  Biao Wang ,  Elena Alexandrovna Alshina

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  G06F17/16 ,  G06F5/01

Abstract: A method of intra prediction of a block, comprising obtaining two lines of reconstructed neighboring samples; deriving a set of reference samples based on the two lines of reconstructed neighboring samples; obtaining a set of MIP coefficients based on a intra prediction mode obtained from a bitstream, wherein a MIP coefficient CMIP of the set of MIP coefficients is obtained based on CMIP=vsgn·(q

公开(公告)号：US20210409702A1

公开(公告)日：2021-12-30

申请号：US17470376

申请日：2021-09-09

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ye-Kui Wang ,  Jianle Chen ,  FNU Hendry

IPC: H04N19/117 ,  H04N19/176 ,  H04N19/159 ,  H04N19/52 ,  H04N19/132 ,  H04N19/186

Abstract: A video coding mechanism is disclosed. The mechanism includes receiving a bitstream comprising a current picture including a sub-picture coded according to inter-prediction. A motion vector for a block of the sub-picture is determined. A clipping function is applied to sample locations in a reference block to support application of an interpolation filter when the motion vector points outside of the sub-picture and when a flag is set to indicate the sub-picture is treated as a picture. The interpolation filter is applied to results of the clipping function to obtain a predicted sample value. The block is decoded based on the predicted sample value. The block is forwarded for display as part of a decoded video sequence.

公开(公告)号：US20210409691A1

公开(公告)日：2021-12-30

申请号：US17470798

申请日：2021-09-09

Applicant: Huawei Technologies Co., Ltd.

Inventor： FNU Hendry ,  Ye-Kui Wang ,  Jianle Chen

IPC: H04N19/107 ,  H04N19/46 ,  H04N19/172 ,  H04N19/162

Abstract: A method of decoding a coded video bitstream implemented by a video decoder is provided. The method includes the video decoder determining whether a value for a first flag is provided by an external input; setting a first flag equal to the value provided by the external input and a second flag equal to the value of the first flag to prevent a gradual decoding refresh (GDR) picture from being output when the value for the first flag is provided by the external input; decoding the GDR picture; and storing the GDR picture in a decoded picture buffer (DPB).

公开(公告)号：US11196991B2

公开(公告)日：2021-12-07

申请号：US16899313

申请日：2020-06-11

Applicant: Huawei Technologies Co., Ltd.

Inventor： Anand Meher Kotra ,  Jianle Chen ,  Semih Esenlik ,  Zhijie Zhao ,  Han Gao ,  Biao Wang ,  Ivan Krasnov

IPC: H04N19/11 ,  H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176

Abstract: A method of coding implemented by a coding apparatus. The method includes selecting an intra prediction mode for a current block, and encoding the selected intra prediction mode using truncated binary coding when the selected intra prediction mode is a remaining mode.

公开(公告)号：US20210344920A1

公开(公告)日：2021-11-04

申请号：US17370805

申请日：2021-07-08

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Han Gao ,  Jianle Chen ,  Semih Esenlik ,  Anand Meher Kotra ,  Biao Wang

IPC: H04N19/122 ,  H04N19/61 ,  H04N19/625 ,  H04N19/196 ,  H04N19/159 ,  H04N19/176

Abstract: A method of video coding a block of a picture includes: obtaining a residual signal resulting from inter- or intra-picture prediction; inferring use of a DCT2 transform core for a sequence of the residual signal; processing the transformation of the block using the inferred transform core.

公开(公告)号：US20210344917A1

公开(公告)日：2021-11-04

申请号：US17318071

申请日：2021-05-12

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jianle Chen ,  Yin Zhao ,  Semih Esenlik

IPC: H04N19/119 ,  H04N19/96 ,  H04N19/132 ,  H04N19/159 ,  H04N19/46 ,  H04N19/169 ,  H04N19/176

Abstract: A method of decoding a coded video bitstream implemented by a video decoder. The method includes determining a split mode for a coding tree unit (CTU) in an encoded bitstream, where the split mode is one of triple tree (TT), vertical binary tree (BT), and horizontal BT; marking a coding unit (CU) from the CTU as not to be predicted by intra prediction when one of three conditions is met; parsing the encoded bitstream to obtain a prediction unit and residual information for the CU from the CTU; and reconstructing the CU based on the prediction unit and the residual information when the CU has been marked.

公开(公告)号：US20210337237A1

公开(公告)日：2021-10-28

申请号：US17369408

申请日：2021-07-07

Applicant: Huawei Technologies Co., Ltd.

Inventor： Vladyslav Zakharchenko ,  Dejun Zhang ,  Kangying Cai ,  Jianle Chen

IPC: H04N19/70 ,  H04N19/597 ,  H04N19/85 ,  H04N19/17

Abstract: A method of point cloud coding (PCC) implemented by a decoder is provided. The method includes receiving, by a receiver of the decoder, a bitstream containing a patch rotation enabled flag and atlas information for a two dimensional (2D) patch; determining, by a processor of the decoder, that the 2D patch is capable of being rotated based on the patch rotation enabled flag; rotating, by the processor, the 2D patch; and reconstructing, by the processor, a three dimensional (3D) image using the atlas information and the 2D patch as rotated.