公开(公告)号：US20250030842A1

公开(公告)日：2025-01-23

申请号：US18907838

申请日：2024-10-07

Applicant: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

Inventor： Junyan HUO ,  Yanzhuo MA ,  Fuzheng YANG ,  Danni WANG ,  Hongqing DU ,  Ming LI

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/176 ,  H04N19/186 ,  H04N19/42 ,  H04N19/50

Abstract: Disclosed are a coding method, a decoding method, and a decoding device. The decoding method includes: determining a reference sample value of a first color component of the current block; according to the reference sample value of the first color component of the current block, determining a weighting coefficient by means of a neural network model, wherein an input for the neural network model comprises the reference sample value of the first color component of the current block; according to the weighting coefficient and a reference sample value of a second color component of the current block, determining a predicted block of the second color component of the current block; and according to the predicted block, determining a reconstructed value of a sampling point of the second color component of the current block.

公开(公告)号：US20250024040A1

公开(公告)日：2025-01-16

申请号：US18903937

申请日：2024-10-01

Applicant: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

Inventor： Fuzheng YANG ,  Ming LI

IPC: H04N19/136 ,  H04N19/169

Abstract: Embodiments of the disclosure provide a method for index determination and a decoder. The method is applicable to a decoder and includes the following. A first index of a current node is determined based on occupied child nodes of a decoded neighbouring node of the current node on a k-th axis.

公开(公告)号：US20240223805A1

公开(公告)日：2024-07-04

申请号：US18608229

申请日：2024-03-18

Applicant: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

Inventor： Junyan HUO ,  Yanzhuo MA ,  Shuai WAN ,  Fuzheng YANG ,  Jinkun GUO

IPC: H04N19/593 ,  H04N19/11 ,  H04N19/136 ,  H04N19/176

CPC classification number: H04N19/593 ,  H04N19/11 ,  H04N19/136 ,  H04N19/176

Abstract: A method for intra prediction and a decoder are provided. The method includes the following operations. At least one neighbouring block of a current block is determined. A first intra prediction mode index of the at least one neighbouring block is determined. An intra prediction mode list is constructed based on the first intra prediction mode index of the at least one neighbouring block. A first intra prediction mode index of the current block is determined based on the intra prediction mode list. A width to height ratio of the current block is obtained, and the first intra prediction mode index is mapped to a second intra prediction mode index according to the width to height ratio. Prediction is performed for the current block based on a target intra prediction mode, and a prediction block is obtained.

公开(公告)号：US20230377207A1

公开(公告)日：2023-11-23

申请号：US18228066

申请日：2023-07-31

Applicant: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

Inventor： Shuai WAN ,  Zhang CHEN ,  Zhecheng WANG ,  Fuzheng YANG

IPC: G06T9/00

CPC classification number: G06T9/001 ,  G06T9/002

Abstract: A geometry reconstruction method performed by a decoder includes that a neighbouring node of a current node is determined based on location information of the current node; a factor of impact of the neighbouring node in direction along a preset axis on the current node is determined based on attribute information of the neighbouring node; a weight of the neighbouring node of the current node is determined; and coordinates of the current node after geometry reconstruction are determined based on the weight of the neighbouring node and the factor of impact of the neighbouring node in direction along the preset axis on the current node.

公开(公告)号：US20230239470A1

公开(公告)日：2023-07-27

申请号：US18127616

申请日：2023-03-28

Applicant: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

Inventor： Yanzhuo MA ,  Ruipeng QIU ,  Junyan HUO ,  Shuai WAN ,  Fuzheng YANG

IPC: H04N19/117 ,  H04N19/17 ,  H04N19/184 ,  G06V10/82

CPC classification number: H04N19/117 ,  H04N19/17 ,  H04N19/184 ,  G06V10/82

Abstract: A video encoding method is applicable to an encoder, and comprises: determining side information having a correlation with a current coding unit; filtering first relevant information to be coded of the current coding unit by using a preset network model and the side information, to obtain second relevant information to be coded; and inputting the second relevant information to be coded into a subsequent coding module for encoding, to obtain a bitstream.

公开(公告)号：US20230053024A1

公开(公告)日：2023-02-16

申请号：US17968883

申请日：2022-10-19

Applicant: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP.,LTD.

Inventor： Junyan HUO ,  Shuai WAN ,  Yanzhuo MA ,  Haixin WANG ,  Fuzheng YANG

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

Abstract: A method for decoding a picture, a method for encoding a picture, an encoder, and a decoder are provided. The method for encoding a picture includes (i) determining a width and a height of a coding block in the picture; (ii) if the width and the height are equal to N, where N is a positive integer power of 2, determining a matrix-based intra prediction (MIP) size identifier indicating that an MIP prediction size equal to N; (iii) deriving a group of reference samples of the coding block; and (iv) deriving an MIP prediction of the coding block based on the group of reference samples and an MIP matrix corresponding to the MIP size identifier.

公开(公告)号：US20230045687A1

公开(公告)日：2023-02-09

申请号：US17955264

申请日：2022-09-28

Applicant: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

Inventor： Yanzhuo MA ,  Junyan HUO ,  Shuai WAN ,  Fuzheng YANG ,  Qihong RAN

IPC: H04N19/52 ,  H04N19/109 ,  H04N19/159 ,  H04N19/176 ,  H04N19/105 ,  H04N19/119 ,  H04N19/139 ,  H04N19/70 ,  H04N19/167 ,  H04N19/56

Abstract: Embodiments of the present application provide an inter prediction method, an encoder, a decoder, and a storage medium. The method comprises: determining a prediction mode parameter of a current block; when the prediction mode parameter indicates that the current block determines an inter prediction value by using a geometrical partition mode (GPM), constructing a merge candidate list of the current block; constructing a GPM motion information candidate list according to first motion information in the merge candidate list of the current block; and determining an inter prediction value of the current block according to the GPM motion information candidate list.

公开(公告)号：US20230007295A1

公开(公告)日：2023-01-05

申请号：US17945261

申请日：2022-09-15

Applicant: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

Inventor： Junyan HUO ,  Yanzhuo MA ,  Shuai WAN ,  Fuzheng YANG ,  Ze GUO

IPC: H04N19/517 ,  H04N19/137 ,  H04N19/176 ,  H04N19/182

Abstract: Processing methods for motion compensation, an encoder, and a decoder are provided. The method includes the following. Determine a search position constellation with a point pointed by an initial motion vector as a center point, where the search position constellation includes N directions, search for at least one search point by using at least one type of step lengths in the directions, where the at least one search point at least includes at least one search point in diagonal directions. Search for at least one search position from the search position constellation based on a preset range coverage rule, where the preset range coverage rule is to arrange search points in the directions for search. Obtain a new motion vector according to the at least one search position, and perform motion compensation based on the new motion vector to obtain a prediction value of a coding unit (CU).

公开(公告)号：US20230007279A1

公开(公告)日：2023-01-05

申请号：US17942679

申请日：2022-09-12

Applicant: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

Inventor： Shuai WAN ,  Yanzhuo MA ,  Junyan HUO ,  Haixin WANG ,  Fuzheng YANG

IPC: H04N19/186 ,  H04N19/105 ,  H04N19/132 ,  H04N19/147 ,  H04N19/176 ,  H04N19/593 ,  H04N19/70 ,  H04N19/80

Abstract: A method for colour component prediction, applied to an encoder and includes: determining a neighbouring reference sample set of a current block, wherein the neighbouring reference sample set comprises at least one reference sample; determining a preset parameter value corresponding to the current block, including: determining a bitdepth value corresponding to a to-be-predicted colour component of the current block; and performing a shift on 1 by the bitdepth value minus 1 to obtain the preset parameter value. The method further includes: determining an input sample matrix by means of a first preset calculation model based on the neighbouring reference sample set and the preset parameter value; and performing colour component prediction on the current block according to the input sample matrix to obtain a prediction block of the current block.

公开(公告)号：US20220141453A1

公开(公告)日：2022-05-05

申请号：US17579795

申请日：2022-01-20

Applicant: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

Inventor： Junyan HUO ,  Shuai WAN ,  Yanzhuo MA ,  Haixin WANG ,  Fuzheng YANG

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

Abstract: A method for decoding a picture, a method for encoding a picture, an encoder, and a decoder are provided. The method for encoding a picture includes (i) determining a width and a height of a coding block in the picture; (ii) if the width and the height are equal to N, where N is a positive integer power of 2, determining a matrix-based intra prediction (MIP) size identifier indicating that an MIP prediction size equal to N; (iii) deriving a group of reference samples of the coding block; and (iv) deriving an MIP prediction of the coding block based on the group of reference samples and an MIP matrix corresponding to the MIP size identifier.