| 音频水印符号检测器的研究 |
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| 引用本文： | 邵亚楠,潘燕,段法兵.音频水印符号检测器的研究[J].青岛大学学报(工程技术版),2011,26(2):32-37. |
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| 作者姓名： | 邵亚楠 潘燕 段法兵 |
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| 作者单位： | 青岛大学复杂性科学研究所,山东青岛,266071 |
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| 基金项目： | 山东省自然科学基金资助项目(ZR2010FM006) |
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| 摘 要： | 提出了一种用于提取音频水印的符号检测器并研究了其鲁棒性能。首先,对于宿主音频的离散余弦变换系数进行绝对值排序,将水印所加的中频系数段分布假设为对称高斯混合分布模型,并依据这种模型设计了一种局部最优检测器,即符号水印检测器。其次,对于这种符号检测器的检测性能进行了详细理论分析和实验证明。数值实验表明,这种检测器对于高斯噪声、重采样、重量化、MPEG压缩、低通滤波等攻击表现出较好的抗攻击性能,同时与符号检测器性能的理论分析相符。
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| 关 键 词： | 音频水印 对称双高斯混合模型 符号检测器 攻击 |
Study of a Sign Detector for Audio Watermark |
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| SHAO Ya-nan,PAN Yan,DUAN Fa-bing.Study of a Sign Detector for Audio Watermark[J].Journal of Qingdao University(Engineering & Technology Edition),2011,26(2):32-37. |
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| Authors: | SHAO Ya-nan PAN Yan DUAN Fa-bing |
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| Affiliation: | SHAO Ya-nan,PAN Yan,DUAN Fa-bing(Institute of Complexity Science,Qingdao University,Qingdao 266071,China) |
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| Abstract: | A sign detector for extracting the audio watermark is proposed and its robustness is studied in this paper.Firstly,the discrete cosine transform(DCT) coefficients of audio signal are sorted by their absolute values.Then,we assume the median frequency domain of the DCT coefficients to be embedded by the watermark as a symmetrical Gaussian mixture distribution model.Based on this distribution model,a locally optimum detector,i.e.,a sign detector,is deduced,and its detection characteristics are analyzed theore... |
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| Keywords: | audio watermark symmetrical Gaussian mixture distribution sign detector attacks |
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