Video encoding method and apparatus, video decoding method and apparatus, devices, system, and storage medium

A video encoding method, comprising:

• determining a reference region of a current block and an interpolation filter of the current block, and determining a prediction block of the current block based on the reference region and the interpolation filter;
• determining an intra prediction mode corresponding to the prediction block, and determining a transform kernel corresponding to the current block based on the intra prediction mode corresponding to the prediction block;
• and
• transforming a residual block of the current block based on the transform kernel corresponding to the current block to obtain transform coefficients of the current block, and performing encoding based on the transform coefficients of the current block to obtain a bitstream.

A non-transitory computer-readable storage medium, having a computer program and a bitstream stored thereon, wherein

• the computer program, when executed by a processor, causes the processor to perform following steps to generate the bitstream:
• determining a reference region of a current block and an interpolation filter of the current block, and determining a prediction block of the current block based on the reference region and the interpolation filter;
• determining an intra prediction mode corresponding to the prediction block, and determining a transform kernel corresponding to the current block based on the intra prediction mode corresponding to the prediction block;
• and
• transforming a residual block of the current block based on the transform kernel corresponding to the current block to obtain transform coefficients of the current block, and performing encoding based on the transform coefficients of the current block to obtain a bitstream.