Table maintenance for HMVP candidate storage

An apparatus for coding video data comprising a processor and a non-transitory memory with instructions thereon, wherein the instructions upon execution by the processor, cause the processor to:

• determine, during a conversion between a first block of visual media data and a corresponding bitstream of the visual media data, the first block which is a coding unit being coded with a geometric partitioning mode which is a prediction mode for the coding unit;
• construct, based on a table storing one or multiple motion candidates which are associated with motion information based on previously coded blocks, a motion candidate list which corresponds to a merge candidate list, wherein the table includes a history based motion vector prediction (HMVP) table;
• determine a geometric partitioning mode merge index for geometric partitions of the first block being included in the corresponding bitstream, wherein the geometric partitioning mode merge index and the motion candidate list are related to motion information of the first block;
• and
• perform the conversion of the first block using the motion information of the first block.

A non-transitory computer-readable storage medium storing instructions that cause a processor to:

• determine, during a conversion between a first block of visual media data and a corresponding bitstream of the visual media data, the first block which is a coding unit being coded with a geometric partitioning mode which is a prediction mode for the coding unit;
• construct, based on a table storing one or multiple motion candidates which are associated with motion information based on previously coded blocks, a motion candidate list which corresponds to a merge candidate list, wherein the table includes a history based motion vector prediction (HMVP) table;
• determine a geometric partitioning mode merge index for geometric partitions of the first block being included in the corresponding bitstream, wherein the geometric partitioning mode merge index and the motion candidate list are related to motion information of the first block;
• and
• perform the conversion of the first block using the motion information of the first block.

A non-transitory computer-readable recording medium storing a bitstream which is generated by a method performed by a video processing apparatus, wherein the method comprises:

• determining, during generating a corresponding bitstream of visual media data from a first block of the visual media data, the first block which is a coding unit being coded with a geometric partitioning mode which is a prediction mode for the coding unit;
• constructing, based on a table storing one or multiple motion candidates which are associated with motion information based on previously coded blocks, a motion candidate list which corresponds to a merge candidate list, wherein the table includes a history based motion vector prediction (HMVP) table;
• determining a geometric partitioning mode merge index for geometric partitions of the first block being included in the corresponding bitstream, wherein the geometric partitioning mode merge index and the motion candidate list are related to motion information of the first block;
• and
• generating the corresponding bitstream from the first block using the motion information of the first block.