基于混沌加密和DWT-DCT-SVD的音频隐藏算法研究.pdf

《基于混沌加密和DWT-DCT-SVD的音频隐藏算法研究.pdf》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、分类号TP000.0学号GS13042046UDC密级公开工程硕士学位论文基于混沌加密和DWT-DCT-SVD的音频隐藏算法研究硕士生姓名吴善崇工程领域电子与通信工程研究方向现代通信技术指导教师王剑教授国防科学技术大学研究生院二〇一七年五月ResearchofAudioHidingAlgorithmbasedonChaoticEncryptionandDWT-DCT-SVDCandidate：WuShanchongAdvisor：WangjianAthesisSubmittedinpartialfulfillmentoftherequ

2、irementsfortheprofessionaldegreeofMasterofEngineeringinInformationSystemandCommunicationEngineeringGraduateSchoolofNationalUniversityofDefenseTechnologyChangsha，Hunan，P.R.China（May，2017）国防科学技术大学研究生院工程硕士学位论文图目录图1.1信息隐藏基本模型.................................................

3、............................................2图1.2信息隐藏三种性能指标之间的关系.................................................................4图2.1频谱和频率掩蔽阈值.........................................................................................8图2.2不同纯色调区域的频谱掩蔽.....................

4、........................................................8图2.3时域掩蔽.............................................................................................................9图2.4一帧音频信号的功率谱.................................................................................

5、..11图2.5一帧音频信号临界频带的能量分布...............................................................11图2.6阈值随频率的变化...........................................................................................12图2.7音频信号的A/D转换处理.............................................................

6、.................12图2.8信息隐藏理论模型...........................................................................................13图2.9音频隐藏系统模型...........................................................................................14图2.10DCT隐藏嵌入过程...........................

7、.............................................................17图2.11DCT提取过程................................................................................................17图2.12DWT隐藏过程.....................................................................................

8、..........18图2.13DWT提取过程......................................................................................