一种基于LDGM码的有损信息压缩方法 |
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引用本文: | 管武,梁利平.一种基于LDGM码的有损信息压缩方法[J].黑龙江电子技术,2014(12):40-43. |
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作者姓名: | 管武 梁利平 |
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作者单位: | 中国科学院微电子研究所,北京100029 |
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基金项目: | 国家科技重大专项项目(2013ZX03003015); 自然科学基金项目(61102073) |
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摘 要: | 利用多边缘二分图代替传统的三分图,实现对低密度生成矩阵码(Low density generator matrix codes,LDGM码)的描述。基于多边缘二分图,提出多边缘置信度传播算法和滤波衰减消解方法,实现基于LDGM码的二进制信息压缩编码。仿真结果表明,该算法具有近香农限的压缩性能,并具有较低的复杂度。
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关 键 词: | 低密度生成矩阵码(LDGM码) 多边缘 置信度传播 消解 |
A lossy source compression approach based on LDGM codes |
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Authors: | GUAN Wu LIANG Li-ping |
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Institution: | (Institute of Mieroelectronics of Chinese Academy of Sciences,Beijing 100029,China) |
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Abstract: | A low complexity approach for binary quantization over low density generator matrix(LDGM) codes is proposed. In contrast to former algorithms, this approach deals with a multi-edge type bipartite graph instead of single type tripartite graph to demonstrate the LDGM code. A multi-edge type belief propagation(METBP) algorithm with a filter-damping decimation is developed for the source compression. The simulation results show that the scheme achieves close to state-of-the-art performance with reduced complexity. |
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Keywords: | low density generator matrix ( LDGM ) codes multi-edge belief propagation (BP) decimation |
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