【摘要】 本文设计了一种混沌序列加密的离散小波变换域数字音频水印算法。首先利用混沌序列对二值图像水印进行加密,然后对原始音频信号分帧并计算帧能量,选择能量较大的帧进行离散小波变换,采用自适应双极性量化的方法将水印嵌入到小波变换的低频系数中。该算法在满足不可感知性的前提下,对于噪声、重采样、滤波以及压缩具有一定的鲁棒性。更多还原

【Abstract】 This paper presents a digital audio watermarking scheme encrypted by chaos sequence based on discrete wavelet transform(DWT).First,encrypt the binary image watermark.Then,after framing the original audio signal and computing energy of every frame,frames with larger energy are selected for DWT.By using self-adaptive bipolar quantization,watermark is embedded in low frequency coefficients of DWT.Under the premise of inaudibility,this scheme is robust against noise,resampling,filtering and compressing.更多还原