Intra Refreshment Algorithm for ROI over Packet Loss Networks

The subjective quality requirement of ROI is not the same as non-ROI There are very many researches on ROI, but they are little research which jointed the overall RDO theory, the rate control, intra macroblock refreshment and ROI. So the paper proposes the RDO intra refreshment algorithm based ROI, and it uses the end-to-end overall distortion theory to analysis and compute the distortion of ROI and non-ROI, and it makes the marcoblock in ROI obtain more intra refreshment chances. As the bit rate is constrained, so the bit rate of the ROI and non-ROI must be reallocated. At last, the algorithm is implemented in reference software JM12.2 of JVT. The simulation results show that the proposed intra refreshment algorithm based ROI obtained a better subjective quality of the reconstructed video than the traditional algorithm in ROI at the decoder.