文章基本信息

标题：Unequal Error Protection in Image Transmission Based on LDPC Codes
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作者：Yuling Zhang ; Xia Li ; Hongyong Yang 等
期刊名称：International Journal of Signal Processing, Image Processing and Pattern Recognition
印刷版ISSN：2005-4254
出版年度：2016
卷号：9
期号：3
页码：1-10
DOI：10.14257/ijsip.2016.9.3.01
出版社：SERSC
摘要：This paper investigates the performance of image transmission with unequal error protection (UEP) schemes based on irregular Low-Density Parity-Check (LDPC) codes. Firstly, the UEP is achieved by mapping different bits of the image bytes to different positions of LDPC codes, i.e. the more important bits in the image are mapped to the variable node with higher degrees in irregular LDPC codes, after the channel coding, we map the information bits into a power efficient QAM constellation and map the parity check bits into a spectral efficiency 16QAM constellation. Simulation results show that the UEP scheme is effective.
关键词：unequal error protection (UEP); image transmission; LDPC codes