公开(公告)号：US20240364883A1

公开(公告)日：2024-10-31

申请号：US18767880

申请日：2024-07-09

Applicant: Hangzhou Hikvision Digital Technology Co., Ltd.

Inventor： Xiaoqiang Cao ,  Fangdong Chen ,  Li Wang

IPC: H04N19/12 ,  H04N19/13 ,  H04N19/176 ,  H04N19/46 ,  H04N19/625

CPC classification number: H04N19/12 ,  H04N19/13 ,  H04N19/176 ,  H04N19/46 ,  H04N19/625

Abstract: Provided is a decoding method, including: acquiring coded data of a current block; determining that a height and a width of the current block are both less than or equal to a preset threshold and the current block is a luma block; acquiring a transform pair index corresponding to the current block from the coded data, and determining the transform pair corresponding to the current block based on the transform pair index, wherein the transform pair comprises a horizontal transform kernel and a vertical transform kernel.

公开(公告)号：US12081750B2

公开(公告)日：2024-09-03

申请号：US18264036

申请日：2022-02-22

Applicant: HANGZHOU HIKVISION DIGITAL TECHNOLOGY CO., LTD.

Inventor： Fangdong Chen ,  Xiaoqiang Cao ,  Yucheng Sun

IPC: H04N19/86 ,  H04N19/117 ,  H04N19/157 ,  H04N19/182 ,  H04N19/186 ,  H04N19/70

CPC classification number: H04N19/117 ,  H04N19/157 ,  H04N19/182 ,  H04N19/186 ,  H04N19/70 ,  H04N19/86

Abstract: Method, apparatus, and devices for encoding and decoding are provided. In one aspect, a method includes: if a current pixel point in a current block satisfies an enable condition of an enhanced refinement mode, determining a gradient value of the current pixel point based on an original pixel value of the current pixel point and an original pixel value of a surrounding pixel point of the current pixel point; based on the gradient value of the current pixel point and the original pixel value of the current pixel point, determining a refined pixel value of the current pixel point.

公开(公告)号：US12063386B2

公开(公告)日：2024-08-13

申请号：US18548785

申请日：2022-03-14

Applicant: HANGZHOU HIKVISION DIGITAL TECHNOLOGY CO., LTD.

Inventor： Xiaoqiang Cao ,  Yucheng Sun ,  Fangdong Chen

IPC: H04N11/02 ,  H04N19/109 ,  H04N19/13 ,  H04N19/139 ,  H04N19/147 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/52 ,  H04N19/70

CPC classification number: H04N19/52 ,  H04N19/109 ,  H04N19/13 ,  H04N19/139 ,  H04N19/147 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/70

Abstract: Methods, apparatuses, devices and storage media for decoding and encoding are provided. In one aspect, a decoding method includes: obtaining a value of an Enhanced Temporal Motion Vector Prediction (ETMVP) mode flag and an ETMVP mode index value for a current coding unit (CU); when the value of the ETMVP mode flag is a first value, determining coordinate information of an initial matching CU of the current CU according to coordinate information of the current CU; constructing an enhanced temporal candidate list based on the coordinate information of the initial matching CU; determining coordinate information of a target matching CU according to the ETMVP mode index value; and determining motion information of a subblock at a corresponding position in the current CU according to the motion information of the target matching CU.

公开(公告)号：US11825082B2

公开(公告)日：2023-11-21

申请号：US17437391

申请日：2020-03-09

Applicant: HANGZHOU HIKVISION DIGITAL TECHNOLOGY CO., LTD.

Inventor： Xiaoqiang Cao ,  Liying Xu ,  Fangdong Chen

IPC: H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/60

CPC classification number: H04N19/119 ,  H04N19/159 ,  H04N19/176 ,  H04N19/60

Abstract: Provided is a decoding method, including: acquiring coded data of a current block; determining size information of subblocks based on subblock partition information of the current block in response to the current block satisfying a subblock partition condition and determining, based on the coded data of the current block, that the current block activates intra subblock partition; determining, based on the size information of each subblock, a transform pair corresponding to the subblock; and performing an inverse transform on inversely quantized data of the subblocks based on the transform pairs corresponding to the subblocks.

公开(公告)号：US12192444B2

公开(公告)日：2025-01-07

申请号：US18009949

申请日：2021-06-24

Applicant: HANGZHOU HIKVISION DIGITAL TECHNOLOGY CO., LTD.

Inventor： Yucheng Sun ,  Xiaoqiang Cao ,  Fangdong Chen ,  Li Wang

IPC: H04N19/00 ,  H04N19/105 ,  H04N19/137 ,  H04N19/159 ,  H04N19/176

Abstract: Embodiments of the present disclosure provide an encoding and decoding method, apparatus and device. The method includes: obtaining a weight prediction angle and weight configuration parameters; configuring reference weight values for surrounding positions outside the current block; determining a surrounding matching position to which the pixel position points; determining a target weight value of the pixel position based on a reference weight value associated with the surrounding matching position, and determining an associated weight value of the pixel position based on the target weight value of the pixel position; determining a first prediction value of the pixel position and a second prediction value; determining a weighted prediction value of the pixel position based on the first prediction value, target weight value, second prediction value and associated weight value; determining weighted prediction values of the current block based on the weighted prediction value of each pixel position of the current block.