查询结果:   彭维,高健,孙瑞鹏,舒其暐,左雷.基于DCT系数比较的音频水印算法[J].计算机应用与软件,2014,31(11):158 - 160,164.
中文标题
基于DCT系数比较的音频水印算法
发表栏目
多媒体技术应用
摘要点击数
1434
英文标题
AN AUDIO WATERMARKING ALGORITHM BASED ON DCTCOEFFICIENTS COMPARISON
作 者
彭维 高健 孙瑞鹏 舒其暐 左雷 Peng Wei Gao Jian Sun Ruipeng Shu Qiwei Zuo Lei
作者单位
上海大学机电工程与自动化学院 上海 200072     
英文单位
School of Mechatronic Engineering and Automation,Shanghai University,Shanghai 200072,China     
关键词
音频水印 DCT变换 平均值 比较
Keywords
Audio watermarking Discrete cosine transform (DCT) Mean Comparison
基金项目
作者资料
彭维,硕士生,主研领域:音频水印。高健,副教授。孙瑞鹏,硕士生。舒其暐,硕士生。左雷,硕士生。 。
文章摘要
提出一种新的基于DCT系数比较的音频盲水印算法。该算法依据平均值具有很好的鲁棒性特点,将音频信号按水印长度分为若干个不重叠数据段,对每个数据段取绝对值的平均值,n个数据段绝对值的平均值一组进行DCT变换,然后以DCT系数中的次小值作?握眨薷腄CT系数中的最小值实现水印信息的嵌入。实验表明,该算法不仅具有较好的不可感知性,对压缩类攻击也具有很强的鲁棒性。
Abstract
In this paper we present a new blind audio watermarking algorithm,which is based on DCT coefficients comparison.Based on the characteristic of mean which has very good robustness,the algorithm divides the audio signal into several non-overlapping data segments according to the length of the watermark,and calculates the mean of absolute value for each data segment,and takes the means of absolute values of n data segments as a group to apply DCT transform.Then it modifies the minimum value of DCT coefficients by taking the second smallest value in DCT coefficient as the reference to implement the embedment of watermarking information.Experiments show that the method has good imperceptibility as well as strong robustness to the compression attacks.
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