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：US20200329253A1

公开(公告)日：2020-10-15

申请号：US16849354

申请日：2020-04-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yin Zhao ,  Haitao Yang ,  Jianle Chen

IPC: H04N19/51 ,  H04N19/176 ,  H04N19/184 ,  H04N19/124 ,  H04N19/61

Abstract: The present disclosure discloses a video decoding method, including: parsing a received bitstream to obtain prediction information of a CU; obtaining a target transform mode of a residual TU; parsing the received bitstream to obtain transform coefficients of the residual TU; applying an inverse quantization to the transform coefficients of the residual TU to obtain dequantized coefficients; applying, based on the target transform mode, an inverse transform to the dequantized coefficients to obtain a residual block of the residual TU; obtaining a prediction block of the CU based on the prediction information; and obtaining a video block based on the residual block and the prediction block; and outputting a video sequence, the video sequence including a video frame that includes the video block.

公开(公告)号：US20200092587A1

公开(公告)日：2020-03-19

申请号：US16689550

申请日：2019-11-20

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yin Zhao ,  Haitao Yang ,  Shan Gao

IPC: H04N19/96 ,  H04N19/182 ,  H04N19/70 ,  H04N19/147 ,  H04N19/157

Abstract: A video image decoding method for parsing split mode information of a coding tree node in a bitstream, obtaining a split mode of the coding tree node from a candidate split mode set of the coding tree node based on the split mode information, parsing the bitstream to obtain coding information of the coding tree node, and reconstructing a pixel value of the coding tree node based on the split mode information and the coding information of the coding tree node.

公开(公告)号：US20190166367A1

公开(公告)日：2019-05-30

申请号：US16263824

申请日：2019-01-31

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yin Zhao ,  Haitao Yang ,  Shan Gao

IPC: H04N19/119 ,  H04N19/96 ,  H04N19/46 ,  H04N19/176

Abstract: An encoding and decoding method, where the decoding method includes obtaining first information of a coding tree unit (CTU) in a to-be-decoded picture from a bitstream, where the first information indicates an allowed value range of a width-to-height ratio of a coding unit (CU) obtained by dividing the CTU, obtaining division information of the CTU from the bitstream, dividing the CTU into one or more CUs based on the first information and the division information, where a width-to-height ratio of the one or more CUs falls within the value range indicated by the first information, and the plurality of CUs do not overlap each other, and decoding the one or more CUs to obtain a reconstructed pixel of the one or more CUs.

公开(公告)号：US10257514B2

公开(公告)日：2019-04-09

申请号：US15408585

申请日：2017-01-18

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yin Zhao ,  Haitao Yang ,  Zhuoyi Lv

IPC: H04N19/30 ,  H04N19/124 ,  H04N19/176 ,  H04N19/60 ,  H04N19/126 ,  H04N19/136 ,  H04N19/18 ,  H04N19/182 ,  H04N19/184 ,  H04N19/186

Abstract: An adaptive dequantization method and apparatus in video coding includes, a statistical feature of a background area in which a current transform block is located is estimated using spatial neighborhood information, or temporal neighborhood information, or spatial neighborhood information and temporal neighborhood information of the transform block, a quantization adjustment factor for dequantization is adaptively derived, and dequantization processing is flexibly adjusted. Hence quantization adjustment information is transmitted in a bitstream, according to the method and the apparatus, and extra bit overheads are not required to transmit the quantization adjustment information, thereby further improving coding efficiency.

公开(公告)号：US20170127062A1

公开(公告)日：2017-05-04

申请号：US15408585

申请日：2017-01-18

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yin Zhao ,  Haitao Yang ,  Zhuoyi Lv

IPC: H04N19/124 ,  H04N19/30 ,  H04N19/60

CPC classification number: H04N19/124 ,  H04N19/126 ,  H04N19/136 ,  H04N19/176 ,  H04N19/18 ,  H04N19/182 ,  H04N19/184 ,  H04N19/186 ,  H04N19/30 ,  H04N19/60

Abstract: An adaptive dequantization method and apparatus in video coding includes, a statistical feature of a background area in which a current transform block is located is estimated using spatial neighborhood information, or temporal neighborhood information, or spatial neighborhood information and temporal neighborhood information of the transform block, a quantization adjustment factor for dequantization is adaptively derived, and dequantization processing is flexibly adjusted. Hence quantization adjustment information is transmitted in a bitstream, according to the method and the apparatus, and extra bit overheads are not required to transmit the quantization adjustment information, thereby further improving coding efficiency.

公开(公告)号：US20250157239A1

公开(公告)日：2025-05-15

申请号：US19019863

申请日：2025-01-14

Applicant: Huawei Technologies Co., Ltd.

Inventor： Huanbang Chen ,  Chen Zhu ,  Yin Zhao ,  Li Song

IPC: G06V30/148 ,  G06V10/26 ,  G06V10/764 ,  G06V30/146 ,  G06V30/19 ,  G06V30/28

Abstract: In a word-including picture encoding method, a word area in a first picture is obtained, where a word area includes at least one character. The word area is filled to obtain a word-filled area, where a height or a width of the word-filled area is n times a preset size, and where n≥1. A second picture is obtained based on the word-filled area and the second picture and word alignment side information including the height or width of the word-filled area is encoded to obtain a first bitstream.

公开(公告)号：US12289455B2

公开(公告)日：2025-04-29

申请号：US18581610

申请日：2024-02-20

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Xiang Ma ,  Fan Mu ,  Yin Zhao ,  Haitao Yang

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

Abstract: This application provides a chroma block prediction method and apparatus. The method includes: obtaining chroma values of chroma samples; obtaining, luma values of luma samples corresponding to the chroma samples; obtaining, from the luma values, a first luma set and a second luma set; grouping the chroma values into a first chroma set and a second chroma set; determining a scaling coefficient in a linear model based on an average value of luma values in the first luma set, an average value of luma values in the second luma set, an average value of chroma values in the first chroma set, and an average value of chroma values in the second chroma set; determining, based on the scaling coefficient, an offset factor in the linear model; and determining prediction information of the chroma block based on the scaling coefficient and the offset factor.

公开(公告)号：US20240422364A1

公开(公告)日：2024-12-19

申请号：US18820059

申请日：2024-08-29

Applicant: Huawei Technologies Co., Ltd.

Inventor： Jianle Chen ,  Yin Zhao

IPC: H04N19/96 ,  H04N19/122 ,  H04N19/14 ,  H04N19/184 ,  H04N19/70

Abstract: A method of decoding includes partitioning a rectangular transform tree node (TTN) using either a vertical binary tree split or a horizontal binary tree split to generate square child TTNs when a maximum transform unit (TU) size for the TTN is smaller than either dimension of the TTN. The method further includes partitioning the child TTNs using a quadtree split to generate transform units (TUs) when the first child TTN dimension and the second child TTN dimension are larger than the maximum TU size, determining that the child TTNs are TUs when the first child TTN dimension and the second child TTN dimension are less than or equal to the maximum TU size, applying the TUs to transform coefficients to generate residuals, and generating a reconstructed block based on the residuals.

公开(公告)号：US12108040B2

公开(公告)日：2024-10-01

申请号：US17670622

申请日：2022-02-14

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yin Zhao ,  Haitao Yang

IPC: H04N19/124 ,  H04N17/00 ,  H04N19/103 ,  H04N19/167 ,  H04N19/186 ,  H04N19/50

CPC classification number: H04N19/124 ,  H04N19/103 ,  H04N19/167 ,  H04N19/186 ,  H04N19/50

Abstract: This application discloses a quantization parameter (QP) setting method includes: determining that a current coding unit (CU) is a chroma CU; and separately performing the following processing on at least one luma CU: when the at least one luma CU has no residual, and both a previous luma CU and a luma-chroma CU that have been encoded before the at least one luma CU in the current quantization group (QG) have no residual, modifying a basic QP of the at least one luma CU to a predictive QP; setting a basic QP of the current CU to the basic QP of the at least one luma CU corresponding to the preset position of the current CU; and performing encoding processing on the current CU based on the basic QP of the current CU.