| 高级音频编码(AAC)的一种信息隐藏方法 |
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| 引用本文： | 唐步天,郭立,刘振华.高级音频编码(AAC)的一种信息隐藏方法[J].声学技术,2008,27(4):533-538. |
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| 作者姓名： | 唐步天 郭立 刘振华 |
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| 作者单位： | 1. 中国科技大学电子科学与技术系,合肥,230026
2. 中国科学院研究生院信息安全国家重点实验室,北京,100039 |
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| 摘 要： | 信息隐藏是20世纪90年代逐步兴起的研究课题。针对高级音频编（Advanced Audio Coding，简称AAC），简要描述了其编解码过程，说明了AAC信息隐藏的主要的概念性方法，然后提出了一种利用频域量化值的统计特性与霍夫曼码书选择间的相关性的信息隐藏的概念性方法，并描述了信息隐藏和信息提取的过程。实验在约3s的AAC压缩音频中隐藏了526bit的信息，证明了该概念性方法的可行性。还分析了目前的信息隐藏的对抗技术——隐秘信息检测技术对其的适应能力。
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| 关 键 词： | 信息隐藏 高级音频编码(AAC) 霍夫曼码书选择 |
| 收稿时间： | 2007/5/1 0:00:00 |
| 修稿时间： | 2007/8/14 0:00:00 |
An information hiding method in advanced audio coding(AAC) |
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| TANG Bu-tian,GUO Li and LIU Zhen-hua.An information hiding method in advanced audio coding(AAC)[J].Technical Acoustics,2008,27(4):533-538. |
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| Authors: | TANG Bu-tian GUO Li and LIU Zhen-hua |
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| Affiliation: | TANG Bu-tian, GUO Li, LIU Zhen-hua (1. Department of Electronics Science and Technology, University of Science and Technology of China Hefei 230026, China; 2. Key State Lab of Information Security, Graduate University of Chinese Academy of Science, Beijing 100039, China) |
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| Abstract: | The problem of information hiding has been studied since 1990＇s. Based on describing the coding-decoding process of AAC and the general ideas of hiding in AAC, a hiding idea of using the relationship between Huffman codebook selection and statistic properties of quantified values in frequency domain is proposed, and the process of information hiding and extracting is also described. The availability of the idea is proved by an experiment of hiding 526 bits in an AAC compressed audio signal of 3 seconds. Some present hiding detection methods are limited to adapt this idea. |
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| Keywords: | information hiding Advanced Audio Coding（AAC） Huffman codebook selection |
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