Motion estimation method and related apparatus for determining target motion vector according to motion of neighboring image blocks

A motion estimation apparatus for determining a target motion vector, comprising:

• a calculating unit, for calculating a plurality of block matching differences associated with a plurality of candidate motion vectors;
• a decision unit, coupled to the calculating unit, for determining a plurality of candidate block matching differences according to the block matching differences and motion of a plurality of neighboring image blocks associated with a target image block;
• and
• a selecting unit, coupled to the decision unit, for selecting a vector corresponding to a minimum block matching difference among the candidate block matching differences as the target motion vector.