Joint Source-Channel Rate-Distortion Optimization for H.264 Video Coding Over Error-Prone Networks
IEEE Transactions on Multimedia
Optimal mode selection and synchronization for robust video communications over error-prone networks
IEEE Journal on Selected Areas in Communications
Video coding with optimal inter/intra-mode switching for packet loss resilience
IEEE Journal on Selected Areas in Communications
A Stochastic Framework for Rate-Distortion Optimized Video Coding Over Error-Prone Networks
IEEE Transactions on Image Processing
Adaptive intra block update for robust transmission of H.263
IEEE Transactions on Circuits and Systems for Video Technology
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Conventional rate-distortion (RD) optimized video coding is formulated for an error-free environment. Special considerations have to be made when transmitting video in lossy networks. In this paper we demonstrate a novel method of weighting the distortion used for mode decisions and motion estimation in H.264. By determining an appropriate weighting factor, motion vectors are biased towards macroblocks (MB) that have less influence on the motion propagation path and mode decisions are made considering a MB's future impact. We therefore propose tracking the influence that each macroblock has along the motion propagation path to determine the weights. Considerable performance improvements are unveiled in comparison with state of the art robust video schemes.