Deblocking of subblock boundaries for affine motion compensated coding

A method of decoding video data, the method comprising:

• determining whether a coding mode for a first block of the video data is an affine mode;
• determining whether pattern refined optical flow (PROF) is enabled in a sequence parameter set (SPS) for the first block;
• determining whether the first block is bi-predicted;
• based at least in part on the coding mode for the first block being the affine mode, the first block being bi-predicted, and PROF being enabled in the SPS for the first block, disabling a deblocking filter for subblock boundaries of the first block;
• and
• decoding the first block with the deblocking filter disabled for the subblock boundaries of the first block.

A device for encoding video data, the device comprising:

• memory configured to store the video data;
• and
• one or more processors implemented in circuitry and communicatively coupled to the memory, the one or more processors being configured to:
• determine whether a coding mode for a first block of the video data is an affine mode;
• signal that pattern refined optical flow (PROF) is enabled in a sequence parameter set (SPS) for the first block;
• determine whether the first block is bi-predicted;
• based at least in part on the coding mode for the first block being the affine mode, the first block being bi-predicted, and PROF being enabled for the first block, disable a deblocking filter for subblock boundaries of the first block;
• and
• encode the first block with the deblocking filter disabled for the subblock boundaries of the first block.

A non-transitory computer-readable storage medium storing instructions that, when executed, cause one or more processors to:

• determine whether a coding mode for a first block of video data is an affine mode;
• determine whether pattern refined optical flow (PROF) is enabled in a sequence parameter set (SPS) for the first block;
• determine whether the first block is bi-predicted;
• based at least in part on the coding mode for the first block being the affine mode, the first block being bi-predicted, and PROF being enabled in the SPS for the first block, disable a deblocking filter for subblock boundaries of the first block;
• and
• decode first block with the deblocking filter disabled for the subblock boundaries of the first block.