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 ma croblock while decoding an erroneous MPEG-2 bitstream. The proposed weighte d boundary matching algorithm (WBMA) refines the conventional boundary matc hing algorithm. Different from the conventional BMAs, the boundary pixels o f a lost macroblock are compared with those of the previous picture located in the same position. The weighting coefficients are also adaptively adjus ted to work robustly in either smooth or abruptly-changing regions. Experim ental results show that the proposed algorithm outperforms the conventional algorithms, especially for the interlaced sequences having large motion or complicated textures. (C) 1999 Published by Elsevier Science B.V. All righ ts reserved.