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| 一种基于心理声学模型的小波包域音频数字水印算法 | |
| 引用本文： | 梁华庆,赵丽丽,钮心忻,杨义先.一种基于心理声学模型的小波包域音频数字水印算法[J].中国石油大学学报(自然科学版),2003,27(6). |
| 作者姓名： | 梁华庆 赵丽丽 钮心忻 杨义先 |
| 作者单位： | 1. 石油大学机电工程学院,北京,102249;北京邮电大学信息安全中心,北京,100876 2. 石油大学机电工程学院,北京,102249 3. 北京邮电大学信息安全中心,北京,100876 |
| 基金项目： | 国家自然科学基金资助项目 ( 60 0 73 0 49)，国家杰出青年基金资助项目 ( 6942 5 0 0 1)，国家“973”项目(G19990 3 5 80 4)，国家“863”项目 ( 2 0 0 2AA14 3 0 41) |
| 摘 要： | 首先根据心理声学模型 ,计算载体音频信号的掩蔽门限 ,并利用人耳听觉的临界频率与小波包子带间的相似特性 ,将DFT域掩蔽门限映射到小波包域 ;然后将水印信号嵌入到中低频小波包系数中 ,嵌入强度由掩蔽门限自适应控制。由于该方案是基于人类听觉系统的 ,在最大限度上挖掘了水印嵌入强度 ,使鲁棒性和不可感知性得到了很好的平衡。实验结果表明 ,利用这种水印算法 ,嵌入的水印信号是不可察觉的 ,并且对数据压缩、加噪、去噪、重采样 (D/A、A/D转换 )、低通滤波等常用音频信号处理技术具有很好的鲁棒性 |
| 关 键 词： | 音频信号 数字水印 心理声学模型 掩蔽门限 鲁棒性 小波包 |
An audio digital watermarking scheme based on wavelet packet and psycho-acoustic model |
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| LIANG Hua-qing,ZHAO Li-li,NIU Xin-xin,et al..An audio digital watermarking scheme based on wavelet packet and psycho-acoustic model[J].Journal of China University of Petroleum,2003,27(6). | |
| Authors: | LIANG Hua-qing ZHAO Li-li NIU Xin-xin |
| Institution: | LIANG Hua-qing,ZHAO Li-li,NIU Xin-xin,et al. College of Mechanical and Electronic Engineering in the University of Petroleum,China,Beijing 102249 |
| Abstract: | The masking threshold for each audio signal segment was calculated on the basis of psycho-acoustic model. According to the similarity between critical band of human auditory system and wavelet packet sub-band, a watermark was embedded into the low-band and mid-band coefficients of digital wavelet packet. The embedding strength was adaptively controlled by the masking threshold. This scheme gets a good balance between the inaudibility and robustness. The experiment results show that the embedded watermark signal is inaudible, and the watermarked audio signal has good robustness against many attacks such as compression, noise, re-sampling (D/A and A/D conversions), low-pass filtering. |
| Keywords: | audio signal digital watermarking psycho-acoustic model masking threshold robustness wavelet packet |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |