Efficient Protection Scheme for SVC Content Based on Network Coding

Abstract

How to protect the video streaming for reasonable usage is a necessary technology in multimedia services over network. However, most the previous schemes are too complicated and time-consuming to apply in real multimedia content protection system. Network Coding (NC) is a new technology which codes the input information at intermediate nodes and can make the network information flow achieve the upper bound of max-flow min-cut theory. Random Linear Network Coding (RLNC) is a practical approach of NC with advantage of decentralized operation. In this paper, we proposed a novel scalable video streaming protection algorithm with an efficient packetization scheme and a distribution scheme according to authority levels of different users based on RLNC approach. The algorithm classified the packetized packets into different levels and employed three kinds of permission matrix (PM) to control the distribution of video streaming. The implementation of the proposed algorithm was described in detail to show the efficiency and low complexity of the method.