Efficient intra refreshment and synchronization algorithms for error resilient video coding for wireless applications

This paper proposes efficient intra refreshment and synchronization algorithms to enhance error resilience of video coding systems for wireless applications. We attack the two problems separately to alleviate the computational burden, instead of jointly optimizing them. We first enhance error resilience of intra/inter coding mode selection by introducing new cost functions for intercoding and intracoding modes, and then optimize the placement of synchronization markers by incorporating data partitioning and error concealment at the decoder in the rate-distortion optimization procedure. Experiments show that the proposed techniques in conjuction with the MPEG4 standard (Simple Profile) provide significant improvements in the error resilience performance. The proposed error resilient techniques can also be easily applied to the H.263+ standard.