An Energy-Aware Cooperative Distributed Video Coding Scheme for Ad Hoc Video Sensor Network  

作　　者：SUN Lifeng LIANG Ke OUYANG Juntao ZHONG Yuzhuo 

机构地区：[1]Department of Computer Science, Tsinghua University, Beijing 100084, China [2]School of Software, Tsinghua University, Beijing 100084, China

出　　处：《Chinese Journal of Electronics》2007年第3期379-384,共6页电子学报（英文版）

基　　金：This work is supported by 973 Program （No.2006CB303103） and the Natural Science Foundation of Beijing （No.4063037）. We would like to thank Dr. Xiang Yong for providing 0DMRP extensions for NS-2 simulation.

摘　　要：Video coding and streaming in ad hoc video sensor network for applications such as emergencies requires low complexity and low power consumption both at the encoder and the decoder with desirable video quality. Distributed video coding （DVC） scheme provides a lightweight encoder but a heavy decoder. Motion compensation interpolation （MCI）, which is a power-consuming task at the decoder, can enhance the DVC decoding quality. However it is unnecessary and inefficient to perform MCI at all the terminals. In this paper we proposed a cooperative Adaptive distributed video codec （ADVC） for ad hoc video sensor network based on multilevel coset codes. To obtain high coding efficiency, unlike other proposals that adopt a powerful proxy, we seek to share this power-consuming task over some powerful mobile terminals in a collaborative way, which we called cooperative power-aware MCI-load schedule strategy. The simulation results showed the proposed cooperative ADVC scheme has a better rate-distortion performance than non-adaptive Distributed video codec （DVC） and the proposed strategy prolongs the network lifetime and leverages the power consumption of terminals.

关 键 词：Distributed video coding Motion compensation Video sensor network Ad hoc 

分 类 号：TN919.81[电子电信—通信与信息系统]