基于遗传算法的自适应鲁棒音频水印算法  

Adaptive and Robust Audio Watermarking Algorithm Based on Genetic Algorithm

作　　者：吴秋玲 曲爱妍 黄丹丹[1] 满征辰 WU Qiu-ling;QU Ai-yan;HUANG Dan-dan;MAN Zheng-cheng(Jinling Institute of Technology,Nanjing 211169,China;Army Engineering University of PLA,Nanjing 210003,China)

机构地区：[1]金陵科技学院网络安全学院,江苏南京211169 [2]陆军工程大学指挥控制工程学院,江苏南京210003

出　　处：《金陵科技学院学报》2022年第4期1-9,共9页Journal of Jinling Institute of Technology

基　　金：国家自然科学基金青年项目(11601202);金陵科技学院高层次人才科研启动基金(jit-b-201918);江苏省科技副总项目(FZ20220114);教育部产学合作协同育人项目(202102089002);江苏省大学生创新创业训练计划项目(202213573082Y)。

摘　　要：针对音频水印技术在工程应用中存在鲁棒性弱且算法参数难以与性能需求相匹配的问题,提出了一种基于遗传算法的自适应鲁棒音频水印算法。算法以变换域系数的均值作为承载水印的特征量,通过调整相邻子频带的特征量之差来嵌入二进制水印。为了提高透明性,算法通过调整两个子频带特征量的相对大小来控制嵌入深度的极性。遗传算法的适应度函数根据透明性、隐藏容量和鲁棒性3个指标来设计,通过种群的不断进化来自适应地搜索算法的最佳参数。实验结果表明:算法能够自动搜索满足性能需求的最佳参数,具有盲提取能力、较大的隐藏容量和良好的透明性,在抵御多种攻击时表现出很强的鲁棒性。Aiming at the weak robustness of audio watermarking technology in engineering applications and the difficulty of matching algorithm parameters with performance requirements,an adaptive and robust audio watermarking algorithm based on genetic algorithm was proposed.In this algorithm,the mean value of the coefficients in the transform domain was used as the characteristic quantity of the watermark,and the binary watermark was embedded by adjusting the difference of the characteristic quantities of the adjacent subbands.In order to improve the transparency,the algorithm controlled the polarity of the embedding depth through adjusting the relative size of the two subband characteristic quantities.The fitness function of the genetic algorithm was designed according to the transparency,payload capacity and robustness.The best parameters which were adaptively searched to match the algorithm were derived from the continuous evolution of the population.The experimental results showed that the algorithm could automatically search the best parameters to meet the performance requirements,had blind extraction ability,large payload capacity and good transparency,and showed strong robustness against multiple attacks.

关 键 词：音频水印算法 鲁棒性 参数匹配 遗传算法 自适应 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]