| 一种RaptorQ码的模式选择解码算法 |
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| 引用本文： | 李 越,张立军,李明齐,朱秋煜.一种RaptorQ码的模式选择解码算法[J].电视技术,2016,40(12):120-124. |
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| 作者姓名： | 李 越 张立军 李明齐 朱秋煜 |
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| 作者单位： | 1. 上海大学,上海200444;中国科学院上海高等研究院,上海201210;2. 中国科学院上海高等研究院,上海,201210;3. 上海大学,上海,200444 |
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| 基金项目： | 中科院战略性先导专项子课题(XDA06010301)，国家基金委青年科学基金项目(61401440)，上海市国际科技合作基金项目(14510722300) |
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| 摘 要： | 针对RaptorQ码解码复杂度高的问题,提出了一种模式选择解码(MSD)算法.该方法结合优化失活解码高斯消元(OIDGE)算法与快速降维解码(DRFD)算法的优点,综合考虑了信道的实际丢包情况与不同解码算法的效率,根据计算所得丢包率,选择合适的解码算法.在嵌入式系统上进行了实验,结果表明,该算法在不同丢包率情况下可以自适应地选择合适的解码算法,提高了RaptorQ码的解码效率.
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| 关 键 词： | 应用层FEC 喷泉码 RaptorQ码 高斯消元解码 |
| 收稿时间： | 2016/4/27 0:00:00 |
| 修稿时间： | 6/2/2016 12:00:00 AM |
A Mode Selection Algorithm for the RaptorQ Code Decoding |
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| Li Yue,Zhang Lijun,Li Mingqi and Zhu Qiuyu.A Mode Selection Algorithm for the RaptorQ Code Decoding[J].Tv Engineering,2016,40(12):120-124. |
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| Authors: | Li Yue Zhang Lijun Li Mingqi and Zhu Qiuyu |
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| Affiliation: | Shanghai University;Shanghai Advanced Research Institute, Chinese Academy of Sciences,Shanghai Advanced Research Institute, Chinese Academy of Sciences,Shanghai Advanced Research Institute, Chinese Academy of Sciences,Shanghai University |
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| Abstract: | Aiming at the problem of high complexity of decoding RaptorQ codes, a Mode Selective Decoding algorithm for RaptorQ code is proposed in this paper. Combined with the advantages of Optimized Inactivation Decoding Gaussian Elimination(OIDGE) algorithm and Dimensionality Reduced Fast Decoding (DRFD) algorithm, we take the actual situation and the efficiency of the channel decoding algorithm into account, and then decide to adopt the corresponding decoding mode according to current packet loss rate. We carry out experiments on embedded system, and the results show that the decoder can select the appropriate algorithm adaptive to the packet loss rate. This improves the decoding efficiency of RaptorQ codes in a certain extent. |
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| Keywords: | application layer FEC fountain code RaptorQ code Gauss decoding |
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