Weighted boundary matching algorithm for error concealment in the MPEG-2 video bit stream

A novel error concealment procedure is presented for recovering the lost macroblock while decoding an erroneous MPEG-2 bitstream. The proposed weighted boundary matching algorithm (WBMA) refines the conventional boundary matching algorithm. Different from the conventional BMAs, the boundary pixels of a lost macroblock are compared with those of the previous picture located in the same position. The weighting coefficients are also adaptively adjusted to work robustly in either smooth or abruptly-changing regions. Experimental results show that the proposed algorithm outperforms the conventional algorithms, especially for the interlaced sequences having large motion or complicated textures.