Multiple description coding of scalable video stream based on unequal loss protection and optimal rate allocation

Forward error correction (fec) codes may be used to protect a video code stream against packeterasures or errors when passing through an error-prone network. to have maximum possible fidelity atthe decoder side, an unequal loss protection (ulp) approach should be used to packetize the scalablevideo code stream, so that the different parts of the scalable video stream are protected according totheir importance. unequal loss-protected packetization leads to segmentation of the scalable code stream,such that the source can be reconstructed with the maximum possible fidelity at the decoder side. inardestani et al. (2009) [1] we have found an analytical relation between the optimal sizes of any twoconsecutive segments. this idea yields an efficient (as efficient as the local search algorithm in stankovicet al. (2002) [2]) low-complexity progressive solution for the segmentation problem. in this paper, we usea progressive approach for ulp packetization of a scalable video stream generated from a tc2d encoder.in addition, an optimal rate allocation is used for optimal rate budget division between successive groupsof pictures (gops) of the video sequence. the experimental results demonstrate that the optimal ratebudget allocation outperforms the conventional strategy of equal rate budget distribution up to 0.65 db.