Sigmastar Technology Ltd.

Qun Wang

Chengwei Zheng

Shao Bo Zhang

Shaobo Zhang

Jianqiang Du

Zhen Bao Huang

Zhenbao Huang

A video coding method includes the following steps: performing a first optimization operation on a sub-coding block to select original pixels or reconstructed pixels of an adjacent block of the sub-coding block according to a base prediction mode to generate an intermediate prediction mode of the sub-coding block; performing a second optimization operation on the sub-coding block to determine a prediction mode according to the intermediate prediction mode, the original pixels of the sub-coding block, and the reconstructed pixels of the adjacent block; generating prediction information of the sub-coding block according to the original pixels of the sub-coding block, the reconstructed pixels of the adjacent block, and the prediction mode; generating encoding coefficients and reconstructed pixels of the sub-coding block according to the prediction information of the sub-coding block; and generating a bit stream according to the encoding coefficients and the prediction information.

Video encoder and video encoding method

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.

Determination method for chroma intra prediction mode and image encoding device

Growing community of inventors

Shanghai, China

Qun Wang