关键词: 运动补偿, 非规则宏块分割, 位移矢量, 邻边长度

Abstract:

To improve the accuracy of predicting the motion vector for irregularly-shaped motion compensation partition, a novel motion vector prediction method based on the adjacent length of neighbor motion compensation partition (MVPAL) is proposed with the consideration of the spatial correlation between the motion information. Firstly, according to the conclusion that the correlation between the motion information strengthens the adjacent length, the proposed method predicts the motion vector with the motion information on the neighboring motion compensation partition with the largest adjacent length. Then, the current coding motion information is stored in the 4×4 block manner for predicting the motion vectors of motion compensation partitions in the remaining macroblocks. Experimental results demonstrate that MVPAL outperforms the existing algorithm for motion vector prediction with different resolution sequences. The average coding efficiency has been improved up to 1.47% compared with the original motion vector prediction algorithm in H.264/AVC.

Key words: motion compensation, irregularly-shaped macroblock partition, motion vector, adjacent length