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

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.