| 基于DCT系数符号的音频零水印算法 |
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| 引用本文： | 孙瑞鹏,徐海涛.基于DCT系数符号的音频零水印算法[J].计算机技术与发展,2014(5):146-149. |
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| 作者姓名： | 孙瑞鹏 徐海涛 |
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| 作者单位： | [1]上海大学机电工程与自动化学院,上海200072 [2]我友网络科技有限公司,上海201800 |
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| 基金项目： | 基金项目：文化部全国文化市场技术监管系统建设项目（ZTXY-2012-F00110） |
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| 摘 要： | 为了解决现有音频水印算法透明性与鲁棒性之间的矛盾，提出了一种基于DCT系数符号的音频零水印算法。算法按水印尺寸对时域音频数据做等长分帧，求取每帧数据的绝对值平均值，依次按时序做离散余弦变换（ DCT）。算法选取数值最大的DCT系数，利用水印属性与最大DCT系数符号做异或运算，得到水印密钥，实现了零水印的嵌入。实验结果表明该算法可以很好地抵抗各类常规的信号处理破坏，水印鲁棒性较强。
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| 关 键 词： | 音频水印 零水印 离散余弦变换 鲁棒性 系数符号 |
An Audio Zero-watermarking Algorithm Based on DCT Coefficients Symbol |
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| SUN Rui-peng,XU Hai-tao.An Audio Zero-watermarking Algorithm Based on DCT Coefficients Symbol[J].Computer Technology and Development,2014(5):146-149. |
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| Authors: | SUN Rui-peng XU Hai-tao |
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| Affiliation: | 1. School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200072, China; 2. Shanghai Woyou Network Technology Co. , Ltd. , Shanghai 201800, China) |
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| Abstract: | In order to solve the contradiction between the transparency and the robustness in the existing audio watermark algorithm,a zero-watermark algorithm based on DCT coefficients processing is proposed. The audio is split into equal frames based on size of watermark, and then calculate the average of the absolute value of each frame and using the average do DCT. The algorithm selects the maximum val-ue of the DCT coefficient,applying the watermark characteristic and maximum value of DCT coefficient for XOR operation to get water-mark key,accomplishing the zero-watermarking embedded. The experimental results show that the algorithm is a strong watermark ro-bustness which can be very good resistance to various types of conventional signal processing. |
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| Keywords: | audio watermark zero-watermark discrete cosine transform robustness coefficients symbol |
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