一种应用心理声学模型的鲁棒音频水印算法

A robust audio watermarking algorithm using psychoacoustic model

数字水印技术作为一种版权保护的重要手段得到了广泛的研究和应用。文中提出了应用心理声学模型对音频进行逐帧分析、自适应地选择水印嵌入位置的算法框架,并在此基础上应用了一种音频频域子带能量量化的水印算法。这一框架对有效地控制听觉透明性和MP3鲁棒性有指导意义。实验证明在保证较高的听觉保真度的同时,算法对各种攻击手段具有满意的鲁棒性。

Digital watermarking techniques have been widely studied and applied as a main method for copyright protection. This paper proposes a framework that analyses each audio frame and selects positions for embedding adaptively using a psychoacoustic model. A new method for embedding digital watermarks into audio signals in the frequency domain based on the critical sub-band energy quantization is introduced. This framework can control the trade-off between the perceptual transparence and robustness against MP3 attacks more efficiently. Experimental results show that the algorithm is robust to the most popular attacks such as MP3 compression, etc.