Towards Practical Distributed Video Coding for Energy-Constrained Networks  

作　　者：CAO Yue GAO Shaoshuai ZHANG Can QIU Gengfeng 

机构地区：[1]School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences

出　　处：《Chinese Journal of Electronics》2016年第1期121-130,共10页电子学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.61072045,No.61032006,No.61271282,No.61571416);"Science100 Program"of the Chinese Academy of Sciences(No.Y12901HEA2)

摘　　要：Most of current distributed video codecs are developed based on the structure of Stanford scheme that employs channel coding like LDPC and Turbo codes.However, they need many times of iteration and feedback,which bring high decoding complexity and latency that make them less practical in energy-constrained networks.In this paper, a new distributed video codec based on modulo operation in the pixel domain is proposed, which only needs one feedback request and has a much lower decoding complexity. Mathematical proof of the equivalence between modulo operation and coset partition in the M-ary field is given, which means that the modulo operation in the M-ary field is a good substitute for channel codes in the distributed video coding systems. A system is built based on the proposed scheme. Simulation results show that the proposed scheme outperforms the state-of-the-art distributed video codecs with the decoding complexity as low as 1% to 10% of them.Most of current distributed video codecs are developed based on the structure of Stanford scheme that employs channel coding like LDPC and Turbo codes.However, they need many times of iteration and feedback,which bring high decoding complexity and latency that make them less practical in energy-constrained networks.In this paper, a new distributed video codec based on modulo operation in the pixel domain is proposed, which only needs one feedback request and has a much lower decoding complexity. Mathematical proof of the equivalence between modulo operation and coset partition in the M-ary field is given, which means that the modulo operation in the M-ary field is a good substitute for channel codes in the distributed video coding systems. A system is built based on the proposed scheme. Simulation results show that the proposed scheme outperforms the state-of-the-art distributed video codecs with the decoding complexity as low as 1% to 10% of them.

关 键 词：Distributed video coding Modulo oper-ation Coset codes Side information. 

分 类 号：TN919.81[电子电信—通信与信息系统]