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
出处
《计算机研究与发展》
EI
CSCD
北大核心
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
