基于卷积码的盲音频水印算法研究  

A blind audio watermarking algorithm based on convolutional codes

作　　者：徐达文[1] 王让定[2] 

机构地区：[1]宁波工程学院电子与信息工程学院,浙江宁波315016 [2]宁波大学纵横智能软件研究所,浙江宁波315211

出　　处：《计算机应用》2006年第7期1649-1651,共3页journal of Computer Applications

基　　金：浙江省自然科学基金资助项目(Y104144)

摘　　要：提出了一种基于提升小波和卷积码的盲音频水印算法。原始音频信号经过提升小波变换后,选取中低频小波系数进行自适应水印嵌入。水印在嵌入前经过卷积编码和交织预处理,以提高水印系统的抗干扰能力。为了增强算法的鲁棒性,水印提取时采用了软判决V iterbi译码。实验结果表明,该水印算法具有较好的性能。A blind audio watermarking algorithm based on convolutional codes was proposed. The watermark was embedded in the low-middle frequency coefficients in lifting wavelet domain adaptively. In order to improve the ability to resist the disturbance, the watermark was processed by convolutional encoding and interleaving before embedding. In order to enhance the robustness, the watermarking detection algorithm which used Viterbi soft-decision decoding was presented. The experiment results show that the performance of the proposed algorithm is good.

关 键 词：盲音频水印 提升小波 卷积码 VITERBI译码 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]