Whole Frame Loss Recovery Algorithm for H.264 Decoders

In this paper, we develop a whole frame loss recovery method for H.264 by using block-based motion vector extrapolation in the decoder. Firstly,we propose a variable-size block motion vetor extrapolation algorithm to construct the motion vectors for the lost frame from available neighboring frame. Then, a more complete motion vector field is obtained by performing median filtering. At last, the blocks without motion vectors are concealed by using linear interpolation algorithm. Experimental results show that this method can alleviate the shortcomings of the fixed-size method effectively and provide better performance than other concealment methods.