Reducing computations in MPEG2 video decoder

This paper presents a new approach to reduce computations and memory accesses in MPEG video decoder. The approach is based on observation that existing decoders spent many redundant computations and memory accesses on processing macroblocks of bidirectionally predicted frames whose content remains actually same to adjacent reference frames. Experiments show that omitting such macroblocks from decoding can reduce the amount of computations and memory accesses required by the B-type frames almost by 43% on average without any impact on picture quality.