Distributed Video Coding Based on Coding Mode-aided Motion Compensation and Robust Mdeia Hashing

To meet the requirement of distributed video coding (DVC) in resource-limited sensor networks, Wyner-Ziv theorem-based source coding with side information only available at the decoder states that an intraframe encoder with interframe decoder system can achieve comparable coding efficiency of a conventional interframe encoder and interframe decoder system. In this paper, firstly, a block discrete cosine transform (DCT)-based Wyner-Ziv video codec with coding mode-aided motion compensation at the decoder is proposed, denoted by " ProposedDVC1. " The major characteristic is that for motion compensation at the decoder, side information generation and error correcting code (ECC) decoding are jointly performed to find the final side information. Similar to most existing Wyner-Ziv video coding systems, " ProposedDVC1 " is with light encoder and heavy decoder. However, in some video communication scenarios, low complexity in both the encoder and decoder is required. In this study, another Wyner-Ziv video codec based on robust media hashing without needing to perform motion estimation at both the encoder and decoder is proposed, denoted by " ProposedDVC2. " The particular contribution of ProposedDVC2 is its low complexity in both the encoder and decoder. Simulation results demonstrate the achievable coding efficiency of ProposedDVC2 is comparable with that of ProposedDVC1 while the complexity of ProposedDVC2 is much lower than that of ProposedDVC1. In addition, both ProposedDVC1 and ProposedDVC2 need no feedback channel.