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用于版权保护与内容认证的多功能音频水印算法

Keywords: 多功能音频水印,版权保护,内容认证,篡改定位,篡改恢复

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Abstract:

针对现有的多功能音频水印算法恢复篡改区域的能力较弱问题,提出了一种多功能双音频水印算法.首先对原始音频信号分帧,结合Mel频谱倒谱系数计算每帧的相似帧,并将其作为鲁棒水印嵌入经过Torus映射的帧的低频小波系数的绝对平均值中;然后将高频小波系数的平均值作为初始值,利用Logistic序列生成认证水印信息,并通过单个量化高频系数的方法将其嵌入到音频信号中.仿真结果表明:所提出的算法具备很强的抗攻击性;脆弱水印对篡改敏感,而且篡改定位精确.

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