| CCSDS基于小波变换图像压缩标准的速率-失真模型 |
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| 引用本文： | 张佳岩,周廷显,沙学军.CCSDS基于小波变换图像压缩标准的速率-失真模型[J].科学技术与工程,2007,7(21):5570-5574. |
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| 作者姓名： | 张佳岩 周廷显 沙学军 |
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| 作者单位： | 哈尔滨工业大学通信技术研究所,哈尔滨,150080 |
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| 基金项目： | 新世纪优秀人才支持计划（NCET-04-0332）基金项目资助 |
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| 摘 要： | 为了能更好地利用有限地深空通信下行信道资源,更准确地分析图像有损压缩的失真大小,提出了一种适合于CCS-DS基于小波变换图像压缩标准的速率-失真模型。该模型基于Mallat关于变换编码中速率与失真的分析,通过测试不同图像算法的速率与失真关系,得到模型中需要的各种参数。仿真结果表明,该模型能很好地与图像压缩标准的速率-失真近似。
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| 关 键 词： | 深空通信 图像压缩 小波变换 速率-失真模型 |
| 文章编号： | 1671-1819（2007）21-5570-05 |
| 修稿时间： | 2007-07-09 |
Rate-distortion Model for CCSDS Image Compression Standards Based on Wavelet Transformation |
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| ZHANG Jia-yan,ZHOU Ting-xian,SHA Xue-jun.Rate-distortion Model for CCSDS Image Compression Standards Based on Wavelet Transformation[J].Science Technology and Engineering,2007,7(21):5570-5574. |
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| Authors: | ZHANG Jia-yan ZHOU Ting-xian SHA Xue-jun |
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| Institution: | Communication Research Center of Harbin Institute of Technology, Harbin 150080, P.R. China |
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| Abstract: | A rate-distortion model is presented in order to make use of the down channel of deep space effectively and analyzed the error of image loss compression exactly.It is fit for CCSDS image compression standards based on wavelet transform.According to mallat rate-distortion expression about transform coding algorithms,several coefficients of the model are obtained by the simulation of testing a lot of images.Simulation results show that the model is a precise approximation to the rate-distortion of image compression standards. |
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| Keywords: | ROI deep space communication image compression discrete wavelet transformation R-D model |
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