標題: | Integrating Non-Repetitive LT Encoders With Modified Distribution to Achieve Unequal Erasure Protection |
作者: | Yen, Kuo-Kuang Liao, Yen-Chin Chen, Chih-Lung Zao, John K. Chang, Hsie-Chia 資訊工程學系 電子工程學系及電子研究所 Department of Computer Science Department of Electronics Engineering and Institute of Electronics |
關鍵字: | BP decoding;LT code;degree;non-repetitive encoding |
公開日期: | 1-十二月-2013 |
摘要: | The performance of LT code is highly related to the code length. A decoder is more likely to deplete degree-1 encoding symbols and terminate during early stage when the code length is short. In this work, we modify the robust Soliton distribution (RSD) and increase the degree-1 proportion. More degree-1 encoding symbols can be generated to relieve early decoding termination. The proportion of low degrees, except for degree-1, is also reduced. Therefore, receivers collect less encoding symbols carrying redundant information. In addition, Non-Repetitive (NR) encoding scheme is proposed to avoid producing repeated degree-1 encoding symbols. To improve video transmission quality, previous studies redesign LT codes to provide Unequal Error Protection (UEP) for different Scalable Video Coding (SVC) layers. Unlike those studies to modify the code structure, we integrate multiple NR encoders to achieve UEP ability. Experimental results show that our UEP scheme outperforms previous studies in terms of the PSNR. |
URI: | http://dx.doi.org/10.1109/TMM.2013.2269898 http://hdl.handle.net/11536/23232 |
ISSN: | 1520-9210 |
DOI: | 10.1109/TMM.2013.2269898 |
期刊: | IEEE TRANSACTIONS ON MULTIMEDIA |
Volume: | 15 |
Issue: | 8 |
起始頁: | 2162 |
結束頁: | 2175 |
顯示於類別: | 期刊論文 |