Error resilient framework using one-pass explicit flexible macroblock ordering map generation and error concealment for H.264/AVC wireless video communication

摘要

H.264/AVC is the newest standard for digital video com-npression developed jointly by ITU-T’s Video Coding Experts Groupnand ISO/IEC’s Moving Picture Experts Group. One feature of the newnstandard is the adoption of a robust error resilience tool at the en-ncoder known as flexible macroblock ordering (FMO). In this paper,nwe present an algorithm to generate a one-pass FMO map based onnspatial and temporal information at the encoder, and an error con-ncealment method at the decoder for wireless video transmission. Thenerror concealment method at the decoder is applied according to thenresidual information derived from the distortion information obtainednat the encoder while the one-pass FMO map is being generated. Ournsimulation results performed under slow and fast fading channelsnconfirm that the proposed technique can reduce the number of unde-ncodable macroblocks up to 66.79% and 80.54%, respectively, whenncompared with no FMO. The peak signal-to-noise ratio improvementsnare up to 2.67 and 1.05 dB, respectively when compared to prede-nfined FMO (Type 1)