Multiple description coding for scalable video coding with redundant slice
Scalable video coding(SVC) is designed to provide adaptable capability for heterogeneous network structures with its scalabilities. Due to the introducing of inter-layer prediction, SVC coded bitstream is much vulnerable to the channel error. To solve this problem, a lot of schemes are proposed. However, they are either not compatible with the standard or just focus on one of scalabilities in SVC. In this paper, we propose a multiple description scheme that is compatible with SVC standard and supports all the scalabilities. The proposed scheme is based on the redundant slice in the SVC standard, in which each layer is composed of primary slice and redundant slice by interleaving. To deal with the mismatch error and propagated error, the quantization step of redundant slice and the mode of each macroblock is tuned by considering the prediction path in the same layer and between different layers, as well as the channel packet loss rate. The experimental results show that the proposed scheme is efficient for the packet loss channel.