查询结果:   朱光,张军亮.基于提升小波变换和SVD的音频水印算法[J].计算机应用与软件,2014,31(2):149 - 152,156.
中文标题
基于提升小波变换和SVD的音频水印算法
发表栏目
多媒体技术应用
摘要点击数
797
英文标题
AUDIO WATERMARKING ALGORITHM BASED ON LIFTING WAVELET TRANSFORM and SVD
作 者
朱光 张军亮 Zhu Guang Zhang Junliang
作者单位
南京信息工程大学经济与管理学院 江苏 南京 210044 新乡医学院管理学院 河南 新乡 453003    
英文单位
School of Economics and Management, Nanjing University of Information Science and Technology, Nanjing 210044, Jiangsu, China School of Management, Xinxiang Medical University, Xinxiang 453003, Henan, China    
关键词
音频水印 提升小波 SVD 实时性
Keywords
Audio watermark Lifting wavelet transform Singular value decomposition (SVD) Real-time property
基金项目
江苏高校优势学科建设工程资助项目;河南省教育厅科学技术研究重点项目(12B510001)
作者资料
朱光,博士生,主研领域:多媒体信息处理与检索。张军亮,讲师。 。
文章摘要
为达到对数字音频版权保护的目的,利用提升小波变换算法复杂度低、计算速度快的优点,提出一种基于提升小波变换和SVD的音频水印算法。首先对原始音频信号进行分段,为确定水印信息的嵌入位置,选取巴克码为同步信号,并在时域内嵌入子音频段的前端部分;再对子音频段后端部分进行提升小波变换,通过量化调制的方法将水印信息嵌入至信号低频系数的奇异值中。实验结果表明,该算法具有良好的透明性和实时性,对噪声、重采样、裁剪、低通滤波等常见信号攻击表现出较强的鲁棒性。
Abstract
In order to protect the digital audio copyright, in this paper we propose an audio watermarking algorithm which is based on lifting wavelet transform (LWT) and SVD by making use of the advantages of LWT algorithm in its low complexity and fast calculation. First, the origin audio signal is segmented, in order to determine the embedded position of the watermark information, the Barker code is selected as the synchronous signal and is embedded into the front end of sub-audio segment in time domain. Then the lifting wavelet transform is performed on rear-end of sub-audio segment, by the quantised modulation means, the watermark is embedded into the singular value of signal’s low frequency component. Experimental results show that the proposed algorithm has good transparency and real-time property, it also performs stronger robustness against the common signal attacks such as noise, resampling, cutting and low-pass filtering.
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