A temporal error concealment algorithm for H.264 using Lagrange interpolation

In this paper, we propose an efficient temporal error concealment algorithm for the new coding standard H.264, which makes use of the Lagrange interpolation formula. In H.264, a 16/spl times/16 inter macroblock can be divided into different block shapes for motion estimation, and each block has its own motion vector. For nature video, the motion vectors within a small area are correlative. Since the motion vector in H.264 covers a smaller area than previous coding standards, the correlation between neighboring motion vectors increases. We can use the Lagrange interpolation formula to constitute a polynomial that describes the motion tendency of motion vectors, which are next to the lost motion vector, and use this polynomial to recover the lost motion vector. The simulation result shows that our algorithm can efficiently improve the visual quality of corrupted videos.