| 一种DWT与DCT相结合的音频数字水印技术 |
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| 引用本文： | 王兰勋,尹超.一种DWT与DCT相结合的音频数字水印技术[J].电声技术,2006(7):32-34,38. |
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| 作者姓名： | 王兰勋 尹超 |
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| 作者单位： | 河北大学,电子信息工程学院,河北,保定,071002 |
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| 摘 要： | 提出了一种将离散小波变化与离散余弦变换相结合的音频数字水印技术。利用离散小波变换的多分辨率特性和离散余弦变换的能量压缩能力,通过修改变换域的低中频系数,把降维后的二值图像嵌入到原始数字音频信号中。该算法可同时应用两种变换,而且嵌入和提取水印的方法简单。实验结果表明该算法水印不易破坏,对数字音频信号的低通滤波、叠加噪声等攻击均具有很好的隐蔽性和稳健性。
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| 关 键 词： | 数字水印 离散小波变换 离散余弦变换 |
| 文章编号： | 1002-8684（2006）07-0032-03 |
| 收稿时间： | 2006-03-30 |
| 修稿时间： | 2006-03-30 |
An Audio Digital Watermark Technology Based on DWT and DCT |
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| WANG Lan-xun,YIN Chao.An Audio Digital Watermark Technology Based on DWT and DCT[J].Audio Engineering,2006(7):32-34,38. |
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| Authors: | WANG Lan-xun YIN Chao |
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| Affiliation: | College of Electronic and Information Engineering, Hebei University, Baoding 071002, China |
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| Abstract: | An audio digital watermark algorithm based on DWT(Discrete Wavelet Transform) and DCT(Discrete Cosine Transform)is presented. The multi-resolution of DWT and the energy compression of DCT are used. The binary image is embedded in the original audio by modifying the coefficients of low frequency and intermediate frequency. The algorithm using two kinds of transforms is easy to embed and extract watermark. The experimental results show that the watermark can not be destroyed easily and the algorithm is robust and imperceptible. |
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| Keywords: | digital watermark DWT DCT |
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