Motion vector list constructing method and system for video coding

A system for constructing a motion vector list for video coding, the system comprises:

• a processor;
• and
• non-transitory computer readable medium storing instructions for execution by the processor that, when executed, configures the processor to perform the following method:
• obtaining a motion information candidate list for a current block that is based on a spatially neighboring block and a time-domain corresponding block;
• and
• obtaining submotion information candidates from motion information of multiple sub-blocks of the current prediction block based on corresponding inter-view blocks of the multiple sub-blocks;
• always selecting one of the sub-motion information candidates for updating the motion information candidate list without first determining whether motion information of the selected sub-motion information candidate is already in the motion information candidate list;
• and
• updating the motion information candidate list with the selected sub-motion information candidate by
• a) inserting the sub-motion information candidate in front of a first candidate in the motion information candidate list when a texture image is processed;
• or
• b) inserting the sub motion information candidate into a location, other than a location in front of a first candidate, in the motion information candidate list when a depth image is processed.

A non-transitory, computer readable medium containing instructions for execution by a processor, where the processor is configured to provide the following acts when executing the instructions:

• obtaining a motion information candidate list for a current prediction block that is based on a spatially neighboring block and a time-domain corresponding block;
• obtaining sub-motion information candidates from motion information of multiple sub blocks of the current prediction block based on corresponding inter-view blocks of the multiple sub-blocks;
• always selecting one of the sub-motion information candidates for updating the motion information candidate list without first determining whether motion information of the selected sub-motion information candidate is already in the motion information candidate list;
• and
• updating the motion information candidate list with the selected sub-motion information candidate by
• a) inserting the sub-motion information candidate in front of a first candidate in the motion information candidate list when a texture image is processed;
• or
• b) inserting the sub motion information candidate into a location, other than a location in front of a first candidate, in the motion information candidate list when a depth image is processed.