基于DWT的同步数字音频盲水印算法研究

An Algorithm of Synchronous Digital Audio Watermarking Based on DWT

文中提出了一种基于离散小波变换的同步数字音频盲水印算法。嵌入的水印为视觉上可辨的二值图像。算法中引入了嵌入同步信号的思想,利用同步信号定位水印的嵌入位置,为了提高信号的鲁棒性,把同步信号与水印隐藏在DWT域的低频系数中;同时,检测水印时不需要原始音频。仿真实验表明:所提出的方法具有较强的鲁棒性和不可感知性,并能有效抵御各种常见攻击。

An algorithm of blind synchronous digital audio watermarking based on Discrete Wavelet Transform （DWT） is proposed. The watermark embedded in this algorithm is a significant binary image. The idea of embedded synchronic signal introduced in the algorithm is proposed, which uses the synchronic signal for locating the watermark location. In order to enhance robustness, synchronic signal and watermark are embedded in the lowest frequency of DWT. Detection of the watermarking can be conducted without original audio frequency, Simulation results show that the algorithm is of good imperceptibility and robustness, and can resist various signal processing manipulations.