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基于离散余弦变换的自适应数字音频水印技术研究 被引量:20

Adaptive Digital Audio Watermarking Based on Discrete Cosine Transform
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摘要 提出了一种将灰度图像嵌入到音频信号的数字水印算法 .该算法以包含丰富信息的灰度图像作为数字水印 ,首先利用 DCT静态图像压缩技术 ,将二维数字水印 (灰度图像 )编码成一维二进制序列并进行随机置乱 ,再对数字音频信号进行分段处理并依据人类听觉系统 (HAS)择段做离散余弦变换 (DCT) ,最后在离散余弦变换域内通过修改中高频 DCT系数完成水印信息的自适应嵌入 .实验结果表明 :该自适应数字音频水印算法不仅具有较好的透明性 ,而且对诸如叠加噪声、有损压缩、低通滤波、重新采样。 Presented a new adaptive digital audio watermarking based on discrete cosine transform . By still image compression technique, discrete cosine transform, and human audio system (HAS), the 2 dimension digital watermark (gray image) can be embedded adaptively into the digital audio signals in our watermarking algorithm. Experimental results show that the proposed watermarking scheme is inaudible and robust against various signal processing such as noising adding, lossy compression, low pass filtering, re sampling, and re quantifying.
出处 《小型微型计算机系统》 CSCD 北大核心 2004年第10期1825-1827,共3页 Journal of Chinese Computer Systems
基金 辽宁省自然科学基金 ( 2 0 0 3 2 10 0 )资助 信息安全国家重点实验室开放基金资助
关键词 离散余弦变换 人类听觉系统(HAS) 数字音频 二维数字水印 discrete cosine transform human audio system (HAS) digital audio 2 D digital watermarking
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参考文献7

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