CAJ | 학술논문

针对传统音频水印算法不能实现盲提取和水印的安全性、鲁棒性不强，提出一种改进算法。采用Logistic混沌序列对降维后的水印信号作进行调制，再结合离散小波变换的多层分辨能力和离散余弦变换的能量汇聚特性，通过修改双变换域的中低频系数，在载体音频中嵌入水印信息。仿真实验表明改进算法具有更好的安全性和鲁棒性。
침대전통음빈수인산법불능실현맹제취화수인적안전성、로봉성불강，제출일충개진산법。채용Logistic혼돈서렬대강유후적수인신호작진행조제，재결합리산소파변환적다층분변능력화리산여현변환적능량회취특성，통과수개쌍변환역적중저빈계수，재재체음빈중감입수인신식。방진실험표명개진산법구유경호적안전성화로봉성。
An improved algorithm is proposed directing against the non-blind extraction of the traditional audio watermarking and watermark’s weak security and robustness. Using Logistic chaotic sequence to modulate the watermark signal after reducing the dimensionality,Combining with the multi-resolution capabilities of discrete wavelet transform and the energy-gathered fea-tures of discrete cosine transform, watermark information is embedded in the audio carrier by modifying the intermediate or low frequency coefficient in dual-transform-domain. The simulation results show that improved algorithm owns better safety and ro-bustness performance.