公开(公告)号：US20250071270A1

公开(公告)日：2025-02-27

申请号：US18791861

申请日：2024-08-01

Applicant: SigmaStar Technology Ltd.

Inventor： Shaobo ZHANG ,  Jianqiang DU ,  Chengwei ZHENG ,  Qun WANG ,  Zhenbao HUANG

IPC: H04N19/11 ,  H04N19/136 ,  H04N19/147 ,  H04N19/176 ,  H04N19/182 ,  H04N19/186 ,  H04N19/593

Abstract: A determination method for a chroma intra prediction mode includes: performing a simple RDO calculation on a luminance value of each pixel of an image block to obtain multiple luminance candidate modes; determining multiple chroma candidate modes according to one of the luminance candidate modes and a chroma simple RDO result calculated by performing a simple RDO calculation on a chroma value of each pixel of the image block; performing a full RDO calculation of the multiple luminance candidate modes on the luminance value of each pixel in the image block to select a luminance target mode; performing a full RDO calculation of the multiple chroma candidate modes on the chroma value of each pixel of the image block to a obtain chroma full RDO result; and determining a chroma target mode according to the luminance target mode and the chroma full RDO result.