Four field variable block size motion compensated adaptive de-interlacing

A four field variable block size motion compensated adaptive deinterlacing method is proposed to improve the accuracy of the motion vectors and lower the occlusions of motion compensated deinterlacing. The proposed de-interlacing method consists of variable block size motion estimation/compensation with four field SAD, interlaced block mode decision, and new block modes. The variable block size motion estimation/compensation improve the accuracy of the motion vectors, especially for spatially-periodic patterns. The new block modes and the interlaced block mode decision make block decisions more precisely, and special patterns that motion compensation cannot be compensated are correctly deinterlaced by these two methods. The subjective view shows the improvement of the accuracy of the motion vectors and the correctness of the mode decision.