OPPORTUNISTIC DECODING OF UNEQUAL ERASURE PROTECTED SCALABLE CODED SOURCE  

作　　者：Xu Jie Zhang Can Gao Shaoshuai Chen Deyuan 

机构地区：[1]School of Information Science and Engineering, Graduate University of Chinese Academy of Sciences, Beijing 100049, China [2]State Key Laboratory of Information Security, Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Journal of Electronics(China)》2010年第1期113-117,共5页电子科学学刊（英文版）

基　　金：Supported by the National Science Foundation of China (No.60773137,60972067);the National 863 Project (No.2007AA01Z297)

摘　　要：In this paper,we propose an opportunistic decoding method to enhance the reconstruction of unequal erasure protected scalable coded source.This method explores some non-channel-decodable symbols of the received packets by opportunistically utilizing the structure information of joint source-channel coding scheme.As a result,a longer prefix of source coded stream may be obtained to enhance the reconstruction of scalable coded source.Experiment results indicate that opportunistic decoding at the receiver can improve the quality of the reconstructed source when channel decoding fails to recover all the source symbols.In this paper, we propose an opportunistic decoding method to enhance the reconstruction of unequal erasure protected scalable coded source. This method explores some non-channel-decodable symbols of the received packets by opportunistically utilizing the structure information of joint source-channel coding scheme. As a result, a longer prefix of source coded stream may be obtained to enhance the reconstruction of scalable coded source. Experiment results indicate that opportunistic decoding at the receiver can improve the quality of the reconstructed source when channel decoding fails to recover all the source symbols.

关 键 词：Unequal erasure protection Opportunistic decoding Scalable coding 

分 类 号：TN919.8[电子电信—通信与信息系统]