| 基于码分多址的大容量鲁棒数字水印方案 |
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| 引用本文： | 许文丽,王命宇,王育民. 基于码分多址的大容量鲁棒数字水印方案[J]. 吉林大学学报(工学版), 2011, 41(2): 547-552 |
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| 作者姓名： | 许文丽 王命宇 王育民 |
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| 作者单位： | 1. 西安财经学院,信息学院,西安,710100
2. 西安电子科技大学ISN国家重点实验室,西安,710071 |
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| 基金项目： | 中央高校基本科研业务费专项基金项目(JY10000901021) |
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| 摘 要： | 提出了基于CDMA的大容量鲁棒数字水印方案。该方案解决了基于CDMA的大容量水印所面临的几方面问题,应用排序后构造分组矩阵的方法,解决了CDMA数字水印系统中嵌入较大水印图像所出现的同址分组干扰严重的问题;通过对合路器合成后的水印序列进行自适应调节,可以有效解决PSNR值下降较大的问题;通过应用线性最小均方误差估计进行水印检测,在不加剧噪声影响的情况下解决了CDMA水印中存在的多址干扰问题。实验结果表明,本文提出的方案和方法实现了水印容量大、宿主图像失真小、水印信息的安全隐蔽性好、抗干扰噪声以及其他常见图像处理攻击的鲁棒性强等优点。
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| 关 键 词： | 通信技术 数字水印 码分多址 Turbo码 线性最小均方误差估计 |
High capacity and robust digital watermarking scheme based on CDMA |
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| XU Wen-li,WANG Ming-yu,WANG Yu-min. High capacity and robust digital watermarking scheme based on CDMA[J]. Journal of Jilin University:Eng and Technol Ed, 2011, 41(2): 547-552 |
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| Authors: | XU Wen-li WANG Ming-yu WANG Yu-min |
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| Affiliation: | XU Wen-li1,WANG Ming-yu1,WANG Yu-min2(1.School of Information,Xi'an University of Finance and Economics,Xi'an 710100,China,2.National Key Laboratory of ISN,Xidian University,Xi'an 710071,China) |
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| Abstract: | A high capacity and robust digital watermarking scheme based on Code Division Multiple Access(CDMA) is proposed.This scheme can solve several watermarking problems.The interference among the groups with the same access is decreased by the construction of a group matrix with the sorted sequence.The problem that the Peak Signal to Noise Ratio(PSNR) value of the original image will decease greatly if a large image watermarking image is embedded in can be solved by adaptively adjusting the final encoded waterma... |
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| Keywords: | communication digital watermarking code division multiple access(CDMA) Turbo code linear minimum mean square error estimation |
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