计算机科学 ›› 2021, Vol. 48 ›› Issue (9): 298-305.doi: 10.11896/jsjkx.200800199
马宾1, 侯金程1, 王春鹏1, 李健1, 施云庆2
MA Bin1, HOU Jin-cheng1, WANG Chun-peng1, LI Jian1, SHI Yun-qing2
摘要: 针对音频文件可逆信息隐藏算法嵌入容量小、安全性不高的问题,文中提出了一种基于码分复用(Code Division Multiplexing,CDM)的音频文件大容量可逆信息隐藏(Reversible Data Hiding,RDH)算法。所提算法采用正交扩展序列将秘密信息可逆地嵌入音频文件中,不但可以保障所嵌入信息的无损提取,而且能够完全恢复原始音频信号;同时,基于嵌入向量的正交特性,将机密信息叠加嵌入到原始载体图像中,在嵌入过程中,不同嵌入向量中的大部分元素相互抵消,使得所提算法在大容量信息嵌入的情况下可取得更高的音频保真能力。而且,接收方只有采用相同的嵌入向量才能实现嵌入信息的正确提取与原始音频信息的无损恢复,有效提升了算法的安全性能。实验结果表明,与其他音频可逆信息隐藏算法相比,基于码分复用(CDM)的音频文件可逆信息隐藏(RDH)算法在相同文件失真情况下具有更大的可逆信息嵌入容量。
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