| LDPC码在小波压缩图像传输中的应用 |
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| 引用本文： | 徐荧,单承赣,钟磊.LDPC码在小波压缩图像传输中的应用[J].计算机与现代化,2008(4):61-64. |
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| 作者姓名： | 徐荧 单承赣 钟磊 |
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| 作者单位： | 合肥工业大学计算机与信息学院,安徽,合肥,230009 |
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| 摘 要： | LDPC码是一种具有低复杂度，强纠错能力的信道编码结构，SPECK算法是嵌入式小波图像压缩编码中性能较好的一种。本文充分考虑SPECK算法和改进LDPC码的特性，提出了根据信源编码后数据在重建时的重要程度进行不等纠错保护的信源信道联合编码方案。实验表明，该方案有利于压缩图像在噪声信道上的可靠传输，提高系统整体纠错性能。
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| 关 键 词： | 低密度校验码 信源信道联合编码 SPECK算法 不等差错保护 |
| 文章编号： | 1006-2475(2008)04-0061-03 |
| 修稿时间： | 2007年4月17日 |
Image Transmission Based on Wavelet Transform Using LDPC |
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| XU Ying,SHAN Cheng-gan,ZHONG Lei.Image Transmission Based on Wavelet Transform Using LDPC[J].Computer and Modernization,2008(4):61-64. |
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| Authors: | XU Ying SHAN Cheng-gan ZHONG Lei |
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| Affiliation: | (School of Computer and Information, Hefei University of Technology, Hefei 230009, China) |
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| Abstract: | LDPC codes are a class of channel codes with low complexity and strong error control strength.SPECK is a good embedded image coding based on wavelet transform.This paper presents a joint source-channel coding scheme based on SPECK and improves LDPC codes according to the unequal error protection(UEP) for the compressed data.The experimental results show that this sheme gives excellent performance for compressed image transmission over noisy channels,improving the performance of the whole system. |
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| Keywords: | LDPC joint source channel coding SPECK unequal error protection(UEP) |
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