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一种基于量化DCT域音频水印新算法
引用本文:周礼华,周治平. 一种基于量化DCT域音频水印新算法[J]. 计算机工程与应用, 2008, 44(19): 87-88. DOI: 10.3778/j.issn.1002-8331.2008.19.025
作者姓名:周礼华  周治平
作者单位:江南大学,通信与控制工程学院,江苏,无锡,214122;江南大学,通信与控制工程学院,江苏,无锡,214122
摘    要:提出一种新的基于量化DCT域的音频水印算法,根据DC分量和AC分量在水印的鲁棒性和不可听性中起着不同的影响来设计水印算法,使水印的鲁棒性和不可听性得到更好的权衡。首先,把音频数据分成含有8个数据的不重叠块,然后,对每个数据块进行DCT变换;通过对DCT系数中DC分量和第四AC分量进行轮流调制来完成水印嵌入,每个数据块嵌入1 bit信息。实验表明该水印算法对于叠加噪声,有损压缩,重量化等常见的数字信号处理具有较好的鲁棒性,同时,水印系统具有很好的不可听性。

关 键 词:音频水印  量化  离散余弦变换  鲁棒性
收稿时间:2007-09-25
修稿时间:2007-12-3 

Novel audio watermarking algorithm based on quantizing DCT domain
ZHOU Li-hua,ZHOU Zhi-ping. Novel audio watermarking algorithm based on quantizing DCT domain[J]. Computer Engineering and Applications, 2008, 44(19): 87-88. DOI: 10.3778/j.issn.1002-8331.2008.19.025
Authors:ZHOU Li-hua  ZHOU Zhi-ping
Affiliation:College of Communication and Control Engineering,Jiangnan University,Wuxi,Jiangsu 214122,China
Abstract:A novel algorithm for audio watermarking based on quantizing DCT domain is proposed,the authors design watermarking algorithm according to DC and AC DCT coefficients play different influence in robustness and inaudibility to tradeoff robustness and inaudibility better.Firstly,the authors decompose the audio into no overlapping blocks every block contain eight data,then,every block is performed the DCT transform.Watermark is embedded by modulating DC DCT coefficient or 4th AC DCT coefficient by turns,every block is embedded one bit message.Experimental results show the algorithm is robust to common operations on digital audio signal,such as add noise,lossy compression,re-quantify etc,and inaudibility is satisfaction.
Keywords:audio watermarking  quantization  DCT transform  robustness
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