Reduction of MPEG2 Video Decoding Computations

V.G. Moshnyaga, N. Migita, and K. Wakisaka (Japan)


Complexity reduction, decoding, MPEG2, video processing


A new approach to reduce computations and memory accesses in MPEG video decoder is proposed. The approach is based on observation that existing decoders spend many redundant computations and memory accesses on processing macroblocks of bidirectionally predicted frames whose content is not changing between 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 visible impact on picture quality.

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