一种心理声学模型的自同步音频数字水印  

Audio Watermarking with Self-Synchronization Based on Psychoacoustic Model

作　　者：陶智[1,2] 赵鹤鸣[1,2] 顾济华[1,2] 谈雪丹[1,2] 

机构地区：[1]苏州大学物理学院,江苏苏州215006 [2]苏州大学电子信息学院,江苏苏州215006

出　　处：《微电子学与计算机》2006年第4期27-30,共4页Microelectronics & Computer

基　　金：国家自然科学基金项目(60572076);江苏省高校自然科学计划项目(05JKB510113);苏州大学大学生课外学术科研基金项目

摘　　要：提出了一种基于心理声学模型的自同步音频水印算法。在掩藏水印信息的同时,嵌入一个同步信号,使水印具有自同步能力。根据人耳听觉系统的心理声学模型,将水印信号和同步信号嵌入到中低频子波系数中,嵌入强度由掩蔽阈值自适应控制。仿真实验证明了算法的不可觉察性和鲁棒性。This paper presents a blind audio watermarking algorithm with self-synchronization based on Psychoacoustic Model.Synchronization code is embedded into audio with the watermark,and the watermark thus has the ability of selfsynchronization.The masking threshold for each audio signal segment was calculated on the basic of psychoacoustic model.According to the psychoacoustic model,a watermark was embedded into the low-band and mld-band coefficients of digital wavelet .The embedding strength was adaptively controlled by the masking threshold. The simulated results demonstrate that the algorithm is reliable and robust.

关 键 词：音频水印 心理声学模型 同步 

分 类 号：TP391[自动化与计算机技术—计算机应用技术] TN911[自动化与计算机技术—计算机科学与技术]