基于时域同步及分块嵌入的音频水印算法  

Audio Watermarking Algorithm Based on Time Domain Synchronization and Block-embedded

作　　者：陈荔聪[1] 陈丽萍[1] 

机构地区：[1]福建师范大学数学与计算机科学学院,福建福州350007

出　　处：《现代电子技术》2008年第21期86-88,91,共4页Modern Electronics Technique

基　　金：福建省自然科学基金资助(A0510012);福建省教育厅项目(JB07048);福建师范大学优秀青年骨干教师培养基金(2008100207)

摘　　要：提出一种基于时域同步的音频水印算法,在音频信号的时间域上检索满足一定信号强度的区域作为同步区域,把水印图像分块,每个水印分块及其编号嵌入到一个同步区域,水印按照分块顺序循环嵌入到检索到的同步区域;水印比特嵌入在同步区域的小波变换域上,通过拼凑法修改低频系数的幅度值实现水印比特的嵌入。水印检测不需要原始音频信号,是一种盲检测水印算法。仿真实验证明了算法对一般的音频信号处理具有较好的鲁棒性和透明性,对同步攻击、抖动攻击具有较好的鲁棒性。Audio watermarking algorithm based on time domain synchronization is proposed in the paper. The algorithm takes the time domain of the audio signal which is satisfied a certain condition as the synchronous signal area, divides the watermark image into several blocks consequently embeds the small blocks and their corresponding serial number into the same synchronous signal area ordered by the divided serial number. In that case,each bit of the watermark is embedded by modifying the low coefficientrs value of synchronous signal area wavelet transformation. The watermark algorithm＇ is a blind watermark detection algorithm which doesn＇t need the original audio signal. The experiments prove the imperceptibility of the watermark and the robustness to the familiar the audio signal processing especially to the synchronous attacks and dithering attacks.

关 键 词：音频水印 时域同步 水印分块 同步攻击 小波变换 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]