| 基于LT码的无损数据压缩算法 |
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| 引用本文： | 高宏峰,师春灵.基于LT码的无损数据压缩算法[J].洛阳师范学院学报,2012,31(5):58-61. |
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| 作者姓名： | 高宏峰 师春灵 |
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| 作者单位： | 河南科技大学电信学院,河南洛阳,471003 |
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| 摘 要： | 针对传统无损数据压缩缺少对传输错误的容错能力的问题,提出了一种基于LT码的无损数据压缩算法,将LT码编码器作为数据压缩器,BP译码器作为解压缩器,并通过二分法搜索递增或递减冗余数据长度.该算法不仅加快了收敛速度,而且提高了压缩效率.仿真结果表明,与已有的同类压缩算法相比,该算法具有较好的压缩性能和较强的噪声鲁棒性.
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| 关 键 词： | LT码 删余 二分法 冗余 |
Data Lossless Compression Algorithm with LT Codes |
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| GAO Hong-feng;SHI Chun-ling.Data Lossless Compression Algorithm with LT Codes[J].Journal of Luoyang Teachers College,2012,31(5):58-61. |
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| Authors: | GAO Hong-feng;SHI Chun-ling |
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| Institution: | GAO Hong-feng;SHI Chun-ling(Electronic Information Engineering College,Henan University of Science and Technology,Luoyang 471003,China) |
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| Abstract: | Traditional lossless data compression algorithms have the drawbacks of lacking tolerating transmission error ability.This paper presents a new algorithm to lossless compression based on LT code.Encoder and BP decoder of LT code is used as compressor and decompressor respectively.Redundancy data is added or punctured to compressor through binary search algorithm.The algorithm not only speeds up the convergence but also improves compressor’s efficiency.Simulation shows that the proposed algorithm has higher compression rate and stronger noise robustness ability than that of the similar compression algorithm. |
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| Keywords: | LT code puncture binary search redundancy |
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