Motion-compensated prediction using nodal-based deformable block matching

A nodal-displacement-based deformation model is proposed to compensate for the inability of the block matching algorithm (BMA) to handle nontranslational motion within a block. This model includes the translational model as a special case with a single node and can characterize increasingly more complex deformation by the use of more nodes. A deformable BMA (DBMA) is developed for the estimation of nodal displacements. A hybrid three-mode method is further proposed, which chooses among the BMA and DBMA.