快速重同步的有意义音频水印盲检测算法  

Meaningful Watermarking for Audio with Fast Resynchronization

作　　者：王泳[1] 黄继武[1] Yun Q.Shi 

机构地区：[1]中山大学电子与通信工程系,广州510275 [2]新泽西理工学院电机工程系

出　　处：《计算机研究与发展》2003年第2期215-220,共6页Journal of Computer Research and Development

基　　金：国家自然科学重点项目基金 (60 13 3 0 2 0 );国家自然科学基金 (69975 0 1160 172 0 67);国家"八六三"高技术研究发展计划基金(2 0 0 2AA14 40 60 );教育部跨世纪优秀人才基金 ;广东省自然科学重点项目基金 (0 13 164 );教育部博士点基金 (2 0 0 2 0 5

摘　　要：同步是音频水印需要解决的关键问题之一 目前的音频水印算法缺乏有效的同步技术 应用通信网同步方法 ,提出了一种快速重同步音频有意义水印盲检测算法 算法的特点如下 :①利用时域水印技术嵌入同步信息以对抗音频在时间轴上可能受到的攻击 ,如裁剪、网络传输中的丢包等 ;②基于数字通信中的帧同步技术 ,实现了音频信号的快速重同步 ;③在保证不可感知性和稳健性的良好平衡下实现了水印的盲检测 ;④应用BCH编码来降低水印的检测错误率 实验结果表明 ,隐藏的水印在对抗噪声、MP3编码和剪裁的稳健性上都达到了较好的性能 。Synchronization is one of the key issues of audio watermarking The current audio watermarking algorithms lack effective techniques for synchronization In this paper the synchronization scheme in communications network is adopted and a fast resynchronized meaningful blind detection audio watermarking algorithm is proposed The features of this algorithm are: ① with the technology of spatial watermarking, synchronization signal is embedded into the audio signal in order to resist some possible attack along the time axis such as cropping, frame losing during network transport, etc , ② fast resynchronization of the audio signal is achieved based on the frame synchronization technology of digital communications, ③ blind detection is realized with the good balance between inaudibility and robustness, and ④ BCH coding is applied in order to lower the error rate of detection The experimental results show that the hidden watermark has good robustness against noises, MP3 coding and cropping, as well as a small computation of the algorithm

关 键 词：快速重同步 音频水印盲检测算法 数字水印 DCT 稳健性 图像水印算法 语音信号处理 音频信号 

分 类 号：TN912.3[电子电信—通信与信息系统]