| 一种基于MPEG-2 AAC编码的音频水印方法 |
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| 引用本文： | 王敬,杨扬,肖蓉. 一种基于MPEG-2 AAC编码的音频水印方法[J]. 北京科技大学学报, 2009, 31(4) |
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| 作者姓名： | 王敬 杨扬 肖蓉 |
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| 作者单位： | 1. 北京科技大学网络中心,北京,100083
2. 北京科技大学信息工程学院,北京,100083 |
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| 摘 要： | 提出了一种针对MPEG-2 AAC压缩音频的脆弱水印算法.该算法利用了AAC中MDCT量化系数大于15的Huffman编码特性来嵌入水印,并依据水印的频率分布和音频信号感知熵PE的大小对嵌入算法进行了分析和改进.实验表明,该算法具有较高隐藏率和良好的不可感知性,并且水印的嵌入和提取过程十分方便快速,适合进行实时分析.
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| 关 键 词： | 音频水印 AAC 压缩域 Huffman编码 |
Audio watermarking based on MPEG-2 AAC |
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| WANG Jing,YANG Yang,XIAO Rong. Audio watermarking based on MPEG-2 AAC[J]. Journal of University of Science and Technology Beijing, 2009, 31(4) |
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| Authors: | WANG Jing YANG Yang XIAO Rong |
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| Abstract: | A fragile audio watermarking method for MPEG-2 AAC bitstreams was proposed.The algorithm of watermark embedding was carried out by modifying the LSBs(least significant bits) of quantized MDCT coefficient's magnitude that is greater than 15,and was improved by considering the watermark's distribution in frequency and the perceptual entropy of host audio.Experimental result shows the proposed watermarking scheme is not appreciable,and it is possible to insert high hide rate additive data effectively into enco... |
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| Keywords: | bitstream watermark AAC compression Huffman coding |
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