Tencent Technology (Shenzhen) Company Limited

Guichun Li

Xiang Li

Shan Liu

Hongbin Zhang

A video encoding method is provided. The method includes decoding intra-frame prediction mode information corresponding to a current decoding unit, decoding first identification information corresponding to the current decoding unit when the intra-frame prediction mode information indicates that a block differential pulse code modulation (BDPCM) mode is applied to the current decoding unit, determining, when the first identification information indicates that a transform block (TB) corresponding to the current decoding unit does not include any non-zero transform coefficients, that a residual block corresponding to the current decoding unit is an all-zero residual block, and reconstructing the current decoding unit according to the residual block and a prediction block corresponding to the current decoding unit. The technical solutions provided in embodiments of this application improve the encoding and decoding efficiency of the decoding unit using the BDPCM mode. Apparatus and non-transitory computer-readable storage medium counterpart embodiments are also provided.

Video encoding and decoding methods and apparatuses, device, and storage medium

A video encoding method and apparatus is provided. The method includes determining a chroma format of a video frame, determining, for a currently decoded first quantization matrix (QM), a size of the first QM according to the determined chroma format and a size of a luma transform block (TB) when the first QM is a chroma QM, and decoding the first QM when the size of the first QM is greater than zero. Thus, a size of a chroma QM is flexibly determined according to a chroma format and a size of a luma TB, rather than a fixed size predefined according to an identifier of the QM, thereby improving flexibility during encoding and decoding of the chroma QM. Apparatus and non-transitory computer-readable storage medium counterpart embodiments are also provided.

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Guangdong, China

Guichun Li