Conditions for updating LUTS

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:

• maintain one or multiple tables, wherein each table includes one or more motion candidates derived from one or more video blocks that have been coded, and arrangement of the motion candidates in the each table is based on a sequence of addition of the motion candidates into the table;
• constructing a motion candidate list for a current video block;
• determine motion information of the current video block using the motion candidate list;
• and
• code the current video block based on the determined motion information;
• wherein whether the determined motion information is used to update a table of the one or multiple tables is based on coded information of the current video block, wherein the table, after updating, is used to construct a motion candidate list of a subsequent video block, and
• wherein using the table to construct the motion candidate list comprises checking at least one motion candidate of the table to determine whether to add the checked motion candidate from the table to the motion candidate list of the subsequent video block, and the coded information comprises a coding mode of the current video block.

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

• maintain one or multiple tables, wherein each table includes one or more motion candidates derived from one or more video blocks that have been coded, and arrangement of the motion candidates in the each table is based on a sequence of addition of the motion candidates into the table;
• construct a motion candidate list for a current video block;
• determine motion information of the current video block using the motion candidate list;
• and
• code the current video block based on the determined motion information;
• wherein whether the determined motion information is used to update a table of the one or multiple tables is based on coded information of the current video block, wherein the table, after updating, is used to construct a motion candidate list of a subsequent video block, and
• wherein using the table to construct the motion candidate list comprises checking at least one motion candidate of the table to determine whether to add the checked motion candidate from the table to the motion candidate list of the subsequent video block, and the coded information comprises a coding mode of the current video 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:

• maintaining one or multiple tables, wherein each table includes one or more motion candidates derived from one or more video blocks that have been coded, and arrangement of the motion candidates in the each table is based on a sequence of addition of the motion candidates into the table;
• constructing a motion candidate list for a current video block;
• determining motion information of the current video block using the motion candidate list;
• and
• encoding the current video block based on the determined motion information,
• wherein whether the determined motion information is used to update a table of the one or multiple tables is based on coded information of the current video block, wherein the table, after updating, is used to construct a motion candidate list of a subsequent video block, and
• wherein using the table to construct the motion candidate list comprises checking at least one motion candidate of the table to determine whether to add the checked motion candidate from the table to the motion candidate list of the subsequent video block, and the coded information comprises a coding mode of the current video block.