【作者】 王让定； 杜呈透；

【Author】 WANG RangDing DU ChengTou CKC Software Lab, NingboUniversity,Ningbo,Zhejiang, P.R.China, 315211

【机构】 宁波大学纵横智能软件研究所；

【摘要】 Garcia提出的基于HAS技术的扩谱音频数字水印盲检算法。该算法存在的问题是当嵌有水印的音频受到去同步的攻击时,嵌入的水印无法提取。在Garcia方法的基础上,提出了抵制去同步攻击的分段同步和预处理受损高频的音频水印检测改进方法,该算法可有效检测经随机裁剪、MP3压缩、替换攻击等去同步攻击的音频水印。大量的实验结果表明,所提方法大大改善了Garcia方法的性能。更多还原

【Abstract】 An improved audio digital watermarking algorithm based on Garcia is presented. In Garcia algorithm, the watermark with imperceptibility, security and some robustness is embedded in the audio signal by combining spread spectrum and human auditory system. However, it can not detect the watermark when a watermarked audio is attacked by de-synchronization. For this problem, an improved detecting method against de-synchronization dividing segmentation and pre-processing corrupted high frequency is proposed in this paper. The proposed algorithm can effectively detect watermark under de-synchronized attack, such as random cutting, MP3 compression, replacement and so on. Experimental results show that the proposed algorithm outperforms Garcia’s.更多还原