摘要
为了提高数字音频水印算法的安全性和鲁棒性,提出一种基于非均匀离散傅立叶变换(Nonuniform Discrete Fourier Transform,NDFT)的幅度比较的音频水印算法。NDFT表示单位圆上的非均匀采样,嵌入水印时可以任意选取合适的频率点,由此提高了系统的安全性能。实验结果表明:提出的算法能有效抵抗多种攻击,如加噪、MP3压缩、重采样、重量化和低通滤波等,具有较高的鲁棒性和安全性。
To enhance security and robustness of digital audio watermarking algorithms,this paper proposes a magnitudes comparison method based on nonuniform discrete Fourier transform（NDFT）.NDFT could set up random sampling points in frequency domain as desired rather than fixed frequency points in DFT to improve the system＇s security when watermarking embedded.The simulation results show the scheme can resist many attacks,such as： MP3 compression,re-sample,re-quantization,low-pass filtering and so on,it also has high robust and security.
出处
《计算机安全》
2011年第9期17-20,共4页
Network & Computer Security
