抗MP3编码的音频水印频域嵌入方案  

Frequency Domain Audio Watermark Embedding Capable of Resisting MP3 Encoding

作　　者：刘伟[1] 王朔中[1] 张新鹏[1] 

机构地区：[1]上海大学通信与信息工程学院,上海200072

出　　处：《应用科学学报》2005年第4期341-344,共4页Journal of Applied Sciences

基　　金：国家自然科学基金资助项目(60372090)

摘　　要：基于MP3编码中所应用的心理声学模型和感知熵(PE),对音频信号中PE值大于1800的帧进行数字水印嵌入.嵌入在频域中进行,通过叠加一个加权的随机复序列嵌入水印信息.在接收端,采用频域相关法能可靠提取嵌入数据,仅用到少量系统参数而不需要原始信号.实验表明该水印具有很好的隐蔽性,对于MP3编码表现出优良的稳健性.Based on the psychoacoustic model II and perceptual entropy (PE) used in MP3 encoding, watermark embedding is carried out by modifying the frames with PE above 1 800. By adding a random complex sequence to the spectral components in the medium and low bands in the frequency domain, a watermark is embedded. Extraction of the embedded data is achieved by using a frequency domain correlation approach without the original host signal. Experimental results show that the proposed scheme can achieve high imperceptibility and satisfactory robustness against MP3 encoding.

关 键 词：音频水印 MP3编码 心理声学模型 感知熵 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]