Method for performing localized multihypothesis prediction during video coding of a coding unit, and associated apparatus

An apparatus for performing localized multihypothesis prediction during video coding of a coding unit, the apparatus comprising:

• a processing circuit arranged to perform video coding on the coding unit, wherein the processing circuit comprises:
• a preprocessing module arranged to divide the coding unit into a plurality of sub-coding units and to process each of the sub-coding units, wherein the preprocessing module obtains motion information of a first set of coded units for multihypothesis motion compensation of a specific sub-coding unit of the sub-coding units, and performs multihypothesis motion compensation on the specific sub-coding unit according to the motion information, and the preprocessing module utilizes a linear combination of a plurality of pixel values derived from the motion information of the first set of coded units as a predicted pixel value of the specific sub-coding unit;
• and
• at least one coding module arranged to perform video coding on the coding unit based upon the multihypothesis motion compensation performed by the preprocessing module;
• wherein the preprocessing module derives a predicted pixel value of another sub-coding unit in the coding unit by utilizing motion information of a second set of coded units comprising at least one coded unit that is not in the first set of coded units.

A method for performing localized multihypothesis prediction during video coding of a coding unit, the method comprising:

• dividing the coding unit into a plurality of sub-coding units;
• and
• processing each of the sub-coding units, wherein the step of processing each of the sub-coding units further comprises:
• obtaining motion information of a plurality of coded units for multihypothesis motion compensation of a specific sub-coding unit of the sub-coding units;
• utilizing a weighted summation of a plurality of pixel values derived from the motion information of the coded units as a predicted pixel value of the specific sub-coding unit;
• and
• deriving a predicted pixel value of another sub-coding unit in the coding unit by utilizing a different weighted summation of the pixel values derived from the motion information of the coded units.