Robust video transmission over correlated mobile fading channels

In this paper, we develop a unique set of techniques to support reliable an d efficient video transmission over bandwidth-limited mobile networks, The video coder is based on the H.263 coding standard, while its transmission s ystem design is based on a joint study of combined source and channel codin g, diversity reception, and pre/postprocessing techniques, In particular, a finite-state Markov model for representing a correlated fading channel wit h diversity is developed. Based on this model, a recursive algorithm is fur ther devised for an efficient estimation of block-code performance. By doin g so, an important means for finding proper diversity and channel coding sc hemes for correlated video data in correlated fading channels is obtained, In addition, robust decoding together with a combined spatial-temporal conc ealment is employed to mitigate the effects of decoding mismatch caused by residual errors. Simulation results confirm that the proposed system can si gnificantly reduce the bursty error effects on the H.263 coded video data w hile maintaining high transmission efficiency.