| 一种基于回声隐藏的数字音频水印改进算法 |
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| 引用本文： | 雷鸣,王新房,刘侨,孙鑫.一种基于回声隐藏的数字音频水印改进算法[J].计算机系统应用,2013,22(7):81-84,94. |
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| 作者姓名： | 雷鸣 王新房 刘侨 孙鑫 |
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| 作者单位： | 西安理工大学 自动化与信息工程学院, 西安 710048;西安理工大学 自动化与信息工程学院, 西安 710048;西安理工大学 自动化与信息工程学院, 西安 710048;西安理工大学 自动化与信息工程学院, 西安 710048 |
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| 摘 要： | 在前后向双核回声隐藏思想的基础上, 提出了一种基于回声隐藏的改进算法. 根据设定的水印的嵌入率来确定音频段的能量阈值,选择短时能量高于此阈值的音频段嵌入水印信息, 并且引入功率倒谱检测法来检测水印信息. 仿真结果表明改进后的算法具有不可感知性更高, 隐藏效果好并且显著降低了水印信息检测的误码率.
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| 关 键 词： | 回声隐藏 短时能量 能量阈值 功率倒谱 |
| 收稿时间： | 2012/12/9 0:00:00 |
| 修稿时间： | 2013/1/21 0:00:00 |
Digital Audio Watermarking Adaptive Algorithm Based on Echo Hiding |
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| LEI Ming,WANG Xin-Fang,LIU Qiao and SUN Xin.Digital Audio Watermarking Adaptive Algorithm Based on Echo Hiding[J].Computer Systems& Applications,2013,22(7):81-84,94. |
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| Authors: | LEI Ming WANG Xin-Fang LIU Qiao and SUN Xin |
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| Affiliation: | Faculty of Automation and Information Engineering, Xi'an University of Technology, Xi'an 710048, China;Faculty of Automation and Information Engineering, Xi'an University of Technology, Xi'an 710048, China;Faculty of Automation and Information Engineering, Xi'an University of Technology, Xi'an 710048, China;Faculty of Automation and Information Engineering, Xi'an University of Technology, Xi'an 710048, China |
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| Abstract: | Based on the method of dual backward and forward delay kernels, an improved algorithm of echo hiding in which watermark codes embedded the audio signal is proposed in this paper. The energy of each segment into which the original audio is first divided was computed. The energy threshold of audio segments is set by the given rate of embedding watermark codes. Then the audio segments whose energy value above the energy threshold are embedded with the watermark codes and the secret information is detected with a power cepstrum computing method. The simulation results show that the improved algorithm has a significant improvement in imperceptibility and can remarkably decrease the bit error rate of detected watermark codes. |
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| Keywords: | echo hiding short-time energy energy threshold power cepstrum |
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