公开(公告)号：US11606571B2

公开(公告)日：2023-03-14

申请号：US16848555

申请日：2020-04-14

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yin Zhao ,  Haitao Yang ,  Shan Liu

IPC: H04N19/196 ,  H04N19/119 ,  H04N19/176 ,  H04N19/61 ,  H04N19/70

Abstract: A video decoding device receives a bitstream including a prediction block and a residual block with coefficients transformed by a Spatial Varying Transform (SVT). The video decoding device determines a type of SVT employed to transform the coefficients in the residual block and determines a position of the SVT relative to the residual block by determining a candidate position step size and a position index for the SVT. The video decoding device applies an inverse transform to the coefficients based on the SVT type and position to create a reconstructed residual block. The video decoding device applies the reconstructed residual block to the prediction block to reconstruct a video block and reconstructs a video sequence for display, the video sequence including a video frame that includes the reconstructed video block.

公开(公告)号：US20220021901A9

公开(公告)日：2022-01-20

申请号：US16712698

申请日：2019-12-12

Applicant: Huawei Technologies Co.., Ltd.

Inventor： Shan Liu ,  Wei Wang

IPC: H04N19/56 ,  H04N19/176 ,  H04N19/52 ,  H04N19/523

Abstract: A decoder including a receiver and a processor is disclosed. The receiver is configured to receive an encoded bitstream containing a motion vector (MV) candidate index for a current block. The processor is coupled to the receiver, and configured to obtain precisions of candidate motion vectors (MVs) corresponding to neighboring blocks of the current block, perform first rounding of the precisions based on a rounding scheme, perform second rounding of the candidate MVs based on the first rounding, perform pruning of the candidate MVs, generate a candidate list based on the second rounding and the pruning, and select one of the candidate MVs from the candidate list for decoding the current block based on the MV candidate index.

公开(公告)号：US11109060B2

公开(公告)日：2021-08-31

申请号：US16815914

申请日：2020-03-11

Applicant: Huawei Technologies Co., Ltd.

Inventor： Shan Gao ,  Huanbang Chen ,  Haitao Yang ,  Jiantong Zhou ,  Shan Liu ,  Sriram Sethuraman ,  Jay Shingala ,  Jeeva Raj A ,  Sagar Kotecha

IPC: H04N19/176 ,  H04N19/523 ,  H04N19/56

Abstract: An image prediction method and apparatus includes obtaining predicted motion information of an image block; determining an initial predicted block of the image block according to the predicted motion information and a reference image of the image block; performing, according to the predicted motion information, L iterative searches in the reference image using an integer pixel step size to obtain an intermediate predicted block of the image block; performing a single search in the reference image using a fractional pixel step size to obtain M predicted blocks of the image block; determining a target predicted block of the image block according to the M predicted blocks and the intermediate predicted block; and obtaining a predicted value of a pixel value of the image block according to a pixel value of the target predicted block.

公开(公告)号：US10992964B2

公开(公告)日：2021-04-27

申请号：US16817885

申请日：2020-03-13

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yin Zhao ,  Haitao Yang ,  Shan Liu

IPC: H04N19/96 ,  H04N19/14 ,  H04N19/169

Abstract: This application provides a method for determining a coding tree node split mode and a coding device. The method includes the step of determining a non-split based coding cost for coding a current image area corresponding to the current node and determining a binary tree split based coding cost for coding the current image area. The method further includes determining, based on the non-split based coding cost and the binary tree split based coding cost, whether a triple tree split based coding cost for coding the current image area needs to be obtained. If the triple tree split based coding cost needs to be obtained, a triple tree split is performed on the current node. The method then determines a split mode of the current node that corresponds to a minimum coding cost.

公开(公告)号：US20220217370A9

公开(公告)日：2022-07-07

申请号：US16848555

申请日：2020-04-14

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yin Zhao ,  Haitao Yang ,  Shan Liu

IPC: H04N19/196 ,  H04N19/61 ,  H04N19/119 ,  H04N19/70 ,  H04N19/176

Abstract: A video decoding device receives a bitstream including a prediction block and a residual block with coefficients transformed by a Spatial Varying Transform (SVT). The video decoding device determines a type of SVT employed to transform the coefficients in the residual block and determines a position of the SVT relative to the residual block by determining a candidate position step size and a position index for the SVT. The video decoding device applies an inverse transform to the coefficients based on the SVT type and position to create a reconstructed residual block. The video decoding device applies the reconstructed residual block to the prediction block to reconstruct a video block and reconstructs a video sequence for display, the video sequence including a video frame that includes the reconstructed video block.

公开(公告)号：US11109024B2

公开(公告)日：2021-08-31

申请号：US16735285

申请日：2020-01-06

Applicant: Huawei Technologies Co., Ltd.

Inventor： Anand Meher Kotra ,  Shan Liu ,  Zhijie Zhao ,  Semih Esenlik ,  Han Gao

IPC: H04N19/117 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/182 ,  H04N19/96

Abstract: The present disclosure relates to image coding/decoding applying deblocking filtering and decoder-based intra-mode determination. In order to efficiently use software and/or hardware resources, the size of the template for the decoder-based intra-mode determination is smaller than the number of lines used by the deblocking filtering.

公开(公告)号：US11064197B2

公开(公告)日：2021-07-13

申请号：US16735285

申请日：2020-01-06

Applicant: Huawei Technologies Co., Ltd.

Inventor： Anand Meher Kotra ,  Shan Liu ,  Zhijie Zhao ,  Semih Esenlik ,  Han Gao

IPC: H04N19/117 ,  H04N19/105 ,  H04N19/159 ,  H04N19/176 ,  H04N19/182 ,  H04N19/96

Abstract: The present disclosure relates to image coding/decoding applying deblocking filtering and decoder-based intra-mode determination. In order to efficiently use software and/or hardware resources, the size of the template for the decoder-based intra-mode determination is smaller than the number of lines used by the deblocking filtering.

公开(公告)号：US11843800B2

公开(公告)日：2023-12-12

申请号：US17549545

申请日：2021-12-13

Applicant: Huawei Technologies Co., Ltd.

Inventor： Shan Liu ,  Wei Wang

IPC: H04N19/56 ,  H04N19/176 ,  H04N19/52 ,  H04N19/523

CPC classification number: H04N19/56 ,  H04N19/176 ,  H04N19/52 ,  H04N19/523

Abstract: An encoder comprising a processor configured to obtain candidate motion vectors (MVs) corresponding to neighboring blocks of a current block, the neighboring blocks neighboring the current block; obtain precisions of the candidate MVs; round the precisions to a target precision based on a rounding scheme; round the candidate MVs based on the target precision; perform pruning of the candidate MVs; generate a candidate list based on the rounding of the candidate MVs and the pruning; select one of the candidate MVs from the candidate list for encoding the current block; and encode an MV candidate index corresponding to the one of the candidate MVs that was selected in a bitstream.

公开(公告)号：US20220103861A1

公开(公告)日：2022-03-31

申请号：US17549545

申请日：2021-12-13

Applicant: Huawei Technologies Co., Ltd.

Inventor： Shan Liu ,  Wei Wang

IPC: H04N19/56 ,  H04N19/176 ,  H04N19/52 ,  H04N19/523

Abstract: An encoder comprising a processor configured to obtain candidate motion vectors (MVs) corresponding to neighboring blocks of a current block, the neighboring blocks neighboring the current block; obtain precisions of the candidate MVs; round the precisions to a target precision based on a rounding scheme; round the candidate MVs based on the target precision; perform pruning of the candidate MVs; generate a candidate list based on the rounding of the candidate MVs and the pruning; select one of the candidate MVs from the candidate list for encoding the current block; and encode an MV candidate index corresponding to the one of the candidate MVs that was selected in a bitstream.

公开(公告)号：US11277648B2

公开(公告)日：2022-03-15

申请号：US16949362

申请日：2020-10-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yin Zhao ,  Haitao Yang ,  Shan Liu

IPC: H04N19/96 ,  H04N19/172 ,  H04N19/184

Abstract: Embodiments of this application disclose a decoding method includes: obtaining a bitstream including picture data; parsing the bitstream to obtain node split mode information of a first-level coding tree and node split mode information of a second-level coding tree, if the split mode corresponding to the first node is no further splitting, parsing the bitstream to obtain encoding information of the first node; and decoding and reconstructing, based on the encoding information of the first node, a coding unit corresponding to the first node, to obtain a picture corresponding to the picture data.