摘要
提出了一种基于扩频序列的音频水印新算法。利用随机序列将水印序列扩展,通过小波变换将水印信号嵌入到二层小波变换的中频系数中,因为嵌入时,利用的是小波系数多者之间的联系,所以在接收端,利用盲检测就可以将水印信号提取出来。实验结果表明该算法对原音频信号的影响极小,并且对于各种音频操作和人为攻击具有较好的鲁棒性。
A watermarking algorithm for digital audio based on spread spectrum is proposed. Using random sequence, the watermarking can be expanded. Through the transform of wavelet, watermarking can be embedded in the second layer of wavelet coefficients. Because of using the relation among the coefficients of wavelet when it is embedded, the watermarking signal can be extracted by blind detection at the receiving end. Experimental results show that the degradation caused by this algorithm is very slight, and the watermarking scheme is robust to various audio processing and malicious attacks.
出处
《重庆邮电学院学报（自然科学版）》
2006年第5期601-604,共4页
Journal of Chongqing University of Posts and Telecommunications(Natural Sciences Edition)
关键词
数字水印
扩频序列
小波变换
watermarking
spread spectrum sequences
wavelet transform
