基于听觉特性的DCT域数字音频水印算法  

Digital audio watermarking algorithm based on psychoacoustic model DCT

作　　者：王永琦[1] 杨洋[2] 

机构地区：[1]上海工程技术大学电子电气学院,上海201620 [2]上海工程技术大学高职学院,上海200437

出　　处：《计算机工程与应用》2008年第3期88-90,共3页Computer Engineering and Applications

基　　金：上海高校选拔培养优秀青年教师科研专项基金( No.05XPYQ50)

摘　　要：提出一种基于听觉掩蔽效应和量化的DCT域音频水印嵌入方案,根据人耳的生理听觉特性,计算音频信号的掩蔽阈值对获取的中低频系数量化后嵌入数字水印图像,量化步长由掩蔽阈值自适应控制,并且水印的提出和检测都不需要原始数字音频信号的参与。实验结果表明,该算法具有较好的不可感知性,并且对压缩、滤波等操作具有较强的鲁棒性。This paper presents a digital audio watermarking algorithm based on psychoacoustic model and quantizing DCT coefficients.The masking threshold for each audio signal segment is calculated on the basic psychoacoustic model,watermarking is embedded by quantizing DCT low-band and mid-band frequency coefficients of digital audio signal.The embedding strength is adaptively controlled by the masking threshold.The experimental results demonstrate that the algorithm does well in transparency and is robust to most popular digital signal processing attacks such as compressionand filtering.

关 键 词：数字音频水印 人类听觉特性 掩蔽闽值 离散余弦变换 量化 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]