中国科学技术大学学报 ›› 2011, Vol. 41 ›› Issue (7): 642-650.DOI: 10.3969/j.issn.0253-2778.2011.07.012

• 原创论文 • 上一篇    下一篇

面向空气信道传播的DCT域音频数字水印算法

张 霞   

  1. 1.江汉大学物理与信息工程学院,湖北武汉 430056; 2.武汉大学计算机学院,湖北武汉 430072; 3. 武汉大学国家多媒体软件工程技术研究中心,湖北武汉 430072
  • 收稿日期:2011-05-04 修回日期:2011-07-04 出版日期:2011-07-31 发布日期:2011-07-31
  • 通讯作者: 张霞
  • 作者简介:张霞(通讯作者),女,1964年生,副教授. 研究方向:数字水印,信息安全,信息隐写. E-mail: zx1964@163.com
  • 基金资助:
    国家科技重大专项(2010ZX03004-003-03),国家自然科学基金重点项目(60832002),湖北省自然科学基金(2009CDB222,2010CDB08602),湖北省教育厅科学技术研究计划指导性项目(B20114505),教育部博士点基金(20090141110054),中央高校基本科研业务费专项资金(6081012),武汉大学博士生自主科研项目(20082160101000050, 20102110101000099)资助.

An audio digital watermarking algorithm in DCT domain for air-channel transmitting

ZHANG Xia   

  1. 1.School of Physics & Information Engineering, Jianghan University, Wuhan 430056, China; 2.School of Computer, Wuhan University, Wuhan 430072, China; 3.National Engineering Research Center for Multimedia Software, Wuhan University, Wuhan 430072, China
  • Received:2011-05-04 Revised:2011-07-04 Online:2011-07-31 Published:2011-07-31

摘要: 提出了一种基于双DCT变换的音频数字水印算法,通过选取首次DCT变换后的DCT域低频系数,对其再次进行DCT变换,得到双DCT域系数.通过修改双DCT域系数,实现水印的嵌入,并且嵌入量较大.实验结果显示,该算法隐藏效果好,对30%的重采样攻击和MP3压缩攻击具有很好的鲁棒性.而且,该算法能够适用于面向空气信道传播的场景,误码率可控制在12%~65%之间.

关键词: 数字水印, AD/DA变换, DCT变换, 同步码

Abstract: An audio sonic watermarking algorithm was proposed based on double DCT transform. The low-frequency coefficients after the first DCT transform were chosen for the second DCT transform. Using the method of modifying the coefficients in the double DCT domain, watermarking was embedded and in large quantities. Experimental results indicate that the proposed algorithm has a good hidden effect, and it has very good robustness, especially to 30% resample and MP3 compression attacks. Moreover, it can be applied to transmitting situation via air channel, with bit error ranging from 12% to 65%.

Key words: digital watermarking, AD/DA conversion, DCT transform, synchronization signal