摘要
数字音频水印的鲁棒性是数字水印领域的研究热点之一。为进一步提高音频水印算法针对幅度缩放等攻击的鲁棒性,借用数字图像归一化的思想,提出了一种基于归一化的抗幅度缩放攻击的数字音频水印算法。该算法首先对音频数据进行自适应分段,然后在空域部分均值化音频数据,最后在三级小波变换的低频系数上以抖动调制的方式实现水印信息的嵌入。实验结果表明所提出的算法对缩放攻击具有很好的鲁棒性,并能够抵抗加噪、低通滤波、重采样、重量化等常见攻击。
The robustness of audio watermarking is one of the research hotspots in watermarking.To improve the robustness against amplitude variation,a wavelet-based adaptive audio watermarking algorithm which can resist amplitude variation is proposed referring to the theory of digital image normalization.In the proposed algorithm,the audio file is decomposed adaptively and smoothed in space domain,and the watermark information is embedded into the low frequency coefficients of three levels wavelet transform with dither quantization.Experimental results show that the proposed algorithm is robust to amplitude variation,and it can resist common watermarking attacks such as additive noise,low pass filter,rep-sampling,and re-quantification.
出处
《计算机工程与应用》
CSCD
北大核心
2010年第15期96-98,共3页
Computer Engineering and Applications
基金
国家自然科学基金No.60772155
北京市自然科学基金No.4082029
网络安全与密码技术福建省高校重点实验室开放课题(No.07A006)~~
关键词
音频水印
幅度缩放
小波变换
抖动量化
audio watermarking
amplitude variation
wavelet transform
dither quantification
