一种基于离散小波变换的抗重录音鲁棒音频水印算法  

A Discrete Wavelet Transform-based Anti-replay Audio Watermarking Algorithm

作　　者：李艳丽 祁传达 LI Yanli;QI Chuanda(College of Computer and Information Technology,Xinyang Normal University,Xinyang 464000,China)

机构地区：[1]信阳师范大学计算机与信息技术学院,河南信阳464000

出　　处：《信阳师范学院学报（自然科学版）》2024年第4期449-453,共5页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(61902085);河南省本科高校教学改革研究与实践项目(2022SYJXLX061)。

摘　　要：为了解决音频内容被重录音后非法传播和使用的问题,提出了一种抗重录音攻击的鲁棒音频水印算法。在对音频信号进行离散小波变换基础上,定义了数字音频特征DWT-CLM(Discrete Wavelet Transform-Coefficient Logarithmic Mean),分析得出了该特征和音频信号DWT近似分量之间的关系,在此基础上提出了基于音频信号DWT-CLM特征的水印嵌入方法。实验分析结果表明,本算法具有较好的不可听性、抗信号处理的能力,尤其在对信号处理满足一定鲁棒性的同时,有一定的容忍重录音攻击的能力。In order to solve the problem of illegal transmission and use of audio content after rerecording,a robust audio watermarking algorithm was proposed.Based on discrete wavelet transform,Discrete Wavelet Transform-Coefficient Logarithmic Mean(DWT-CLM)was defined,the relationship between DWT-CLM and the approximate components of DWT was analyzed,and a watermark embedding method was proposed based on DWT-CLM.Experimental results showed that the proposed algorithm had the good inaudibility and anti-signal processing ability,especially in the signal processing to meet a certain robustness,and a certain tolerance for re-recording attacks.

关 键 词：离散小波变换 数字水印 版权保护 特征提取 重录音攻击 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]