Computer Engineering and Applications ›› 2008, Vol. 44 ›› Issue (3): 88-90.

• 学术探讨 • Previous Articles     Next Articles

Digital audio watermarking algorithm based on psychoacoustic model DCT

WANG Yong-qi1,YANG Yang2   

  1. 1.College of Electrical and Electronic Engineering,Shanghai University of Engineering Science,Shanghai 201620,China
    2.College of Advanced Vocational Technical,Shanghai University of Engineering Science,Shanghai 200437,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-01-21 Published:2008-01-21
  • Contact: WANG Yong-qi

基于听觉特性的DCT域数字音频水印算法

王永琦1,杨 洋2

  

  1. 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
  • 通讯作者: 王永琦

Abstract: 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.

Key words: digital audio watermarking, human auditory system, masking threshold, DCT transform, quantization

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。

关键词: 数字音频水印, 人类听觉特性, 掩蔽阈值, 离散余弦变换, 量化