Video decoding method and apparatus, readable medium, electronic device, and program product

A video decoding apparatus, comprising:

• processing circuitry configured to:
• acquire a coding block of a video image frame and a derived tree adopted by the coding block;
• decode, according to a target division mode corresponding to the derived tree, a plurality of sub-blocks in the coding block to obtain a plurality of sub-coefficient blocks, the target division mode being one of a plurality of additional division modes corresponding to the derived tree, the plurality of additional division modes being configured to divide a designated prediction block in the coding block with a side length that is not an integer power of 2 into sub-blocks with side lengths that are integer powers of 2;
• and
• generate reconstructed images according to the derived tree adopted by the coding block and the plurality of sub-coefficient blocks.

A non-transitory computer-readable storage medium, storing instructions which when executed by a processor cause the processor to perform:

• acquiring a coding block of a video image frame and a derived tree adopted by the coding block;
• decoding, according to a target division mode corresponding to the derived tree, a plurality of sub-blocks in the coding block to obtain a plurality of sub-coefficient blocks, the target division mode being one of a plurality of additional division modes corresponding to the derived tree, the plurality of additional division modes being configured to divide a designated prediction block in the coding block with a side length that is not an integer power of 2 into sub-blocks with side lengths that are integer powers of 2;
• and
• generating reconstructed images according to the derived tree adopted by the coding block and the plurality of sub-coefficient blocks.