| 高斯噪声信道数字水印的容量分析 |
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| 引用本文： | 王晓鹏,刘玉. 高斯噪声信道数字水印的容量分析[J]. 华中科技大学学报(自然科学版), 2004, 32(6): 10-12 |
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| 作者姓名： | 王晓鹏 刘玉 |
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| 作者单位： | 华中科技大学,电子与信息工程系,湖北,武汉,430074;华中科技大学,电子与信息工程系,湖北,武汉,430074 |
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| 摘 要： | 从信息论的角度，就基于高斯噪声信道的数字水印容量进行了探索，针对高斯信源分布具有最大的不确定性，能够在所有的二阶随机分布中提供最大信息熵的特点，分析了高斯分布情况下的整个水印信道通信过程，给出并简化了基于高斯的水印信道容量的最大通信速率，同时利用Matlab绘出了非高斯信源水印容量与受限失真度的二维和三维关系仿真曲线，最后给出了结果分析。
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| 关 键 词： | 数字水印 信道容量 信息论 高斯噪声信道 |
| 文章编号： | 1671-4512(2004)06-0010-03 |
| 修稿时间： | 2003-06-15 |
Digital watermarking capacity and its optimization in Gaussian noise channels |
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| Wang Xiaopeng Liu YuWang Xiaopeng Bachelor, Dept. of Electronics , Information Eng.,Huazhong Univ. of Sci. , Tech.,Wuhan ,China.. Digital watermarking capacity and its optimization in Gaussian noise channels[J]. JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE, 2004, 32(6): 10-12 |
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| Authors: | Wang Xiaopeng Liu YuWang Xiaopeng Bachelor Dept. of Electronics & Information Eng. Huazhong Univ. of Sci. & Tech. Wuhan China. |
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| Affiliation: | Wang Xiaopeng Liu YuWang Xiaopeng Bachelor, Dept. of Electronics & Information Eng.,Huazhong Univ. of Sci. & Tech.,Wuhan 430074,China. |
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| Abstract: | A rudimental research for the Gaussian Watermarking Capacity in an information-theoretic view was given. first, the paper briefly introduces the modeling of image watermarking system and explains the channel formation. Then, considering that the Gaussian distribution has the most uncertainty and could provide the maximum entropy among all given second order distributions, the paper focuses on the watermarking communication process provided that watermark channel was a given Gaussian. The formula of maximum transmission rate for Gaussian Watermarking channels is given and simplified, and the 2-D and 3-D curves for the relationship between the distortion and channel capacity by Matlab illustrated. Finally, it analyses the results at different distortions in two different usages of water marking. |
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| Keywords: | digital watermarking channels capacity information theory Gaussian noise channel |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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