Error concealment with parallelogram partitioning of the lost area

Abstract

In this paper, we proposed a video error concealment algorithm using Motion Vector (MV) recovery for parallelogram partitions in the lost area. Error concealment is inevitable when some video packets are lost during transmission and correction or retransmission is not feasible. In conventional methods, MVs are recovered for the square shaped blocks which are then used for motion compensated temporal replacement. But in our proposed method, by parallelogram partitioning of the lost area, the MVs are found for more general shaped blocks. The parallelograms with various sizes and angles are examined, and then the best combination (size and angle) is selected with the assist of a border matching algorithm and a blind quality assessment method. Experimental results show that our method outperforms the other error concealment algorithms, both subjectively and objectively.