多重水印嵌入的DWT-SVD音频公开水印算法

提出了一种基于离散小波变换（Discrete Wavelet Transform,DWT）域与奇异值分解（Singular Value Decomposition,SVD）的多重嵌入数字音频水印算法.算法在嵌入水印前采用混沌加密与图像置乱对水印进行双重加密,在选取音频载体的多段数据中,利用DWT的多分辨率特性与SVD值稳定特性的特点,先对各段数据进行多级DWT变换,然后在低频部分选取连续的若干个系数组成矩阵,并对矩阵进行SVD分解,再把加密后的每位水印信息采用量化方法嵌入到SVD值中,实现了水印的多重嵌入.实验表明,该水印方法效率高,透明性好,对常见的音频信号处理具有较强的鲁棒性.

An Audio Public Watermarking Algorithm Based on Multiple Watermarks Embedding in DWT-SVD Domain

A multiple embedding audio watermarking algorithm based on DWT domain and SVD decomposition is proposed. The algorithm proposes to use chaos encrypting and image scrambling as double encryption preprocessing during watermark embedding. In selected multiple segment data, it makes full use of the multi-resolution of DWT and value stable of SVD. The selected audio segments are carried on DWT firstly,then matrix is constructed using the selected some continuous coefficients of low frequency components. The matrix is decomposed by SVD. The encrypted watermark information is embedded in value of SVD by quantification method, and realizes multiple watermarks embedding. Experiments show that the algorithm is good at efficiency and imperceptibility, and has better robustness to common audio processing operation.