公开(公告)号：US20240364881A1

公开(公告)日：2024-10-31

申请号：US18765937

申请日：2024-07-08

Applicant: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

Inventor： Hyeong Moon JANG ,  Sangheon LEE

IPC: H04N19/117 ,  H04N19/132 ,  H04N19/186 ,  H04N19/46 ,  H04N19/80

CPC classification number: H04N19/117 ,  H04N19/132 ,  H04N19/186 ,  H04N19/46 ,  H04N19/80

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure may comprise obtaining a reconstructed picture, determining a target boundary of deblocking filtering in the reconstructed picture, determining a boundary strength for the target boundary, and applying deblocking filtering to the target boundary based on the boundary strength. Based on the target boundary being a transform block boundary and a color component of the reconstructed picture being a chroma component, the boundary strength may be determined based on whether joint CbCr residual coding is performed on at least one of two blocks adjacent to the target boundary, and the joint CbCr residual coding may correspond to encoding residual samples for a chroma Cb component and a chroma Cr component as a single transform block.

公开(公告)号：US20250055980A1

公开(公告)日：2025-02-13

申请号：US18930635

申请日：2024-10-29

Applicant: GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.

Inventor： Hyeong Moon JANG

IPC: H04N19/105 ,  H04N19/132 ,  H04N19/159 ,  H04N19/176 ,  H04N19/46

Abstract: An image decoding method performed by an image decoding apparatus includes: determining that bi-directional optical flow (BDOF) or prediction refinement with optical flow (PROF) is applied to a current block; generating a prediction sample of the current block from a reference picture of the current block based on motion information of the current block; and deriving a refined prediction sample for the current block, by applying BDOF or PROF to the generated prediction sample of the current block, where the generating the prediction sample of the current block is performed based on whether a current subpicture including the current block is treated as a picture, where the generating the prediction sample of the current block comprises obtaining a reference sample specified by a position inside the reference picture and left-shifting a value of the reference sample, where the position inside the reference picture is clipped in a predetermined range.