CAJ | 학술논문

提出一个基于超混沌加密的半脆弱音频水印方案。该方案利用超混沌序列对图像水印进行加密，不仅能消除水印图像相邻像素的相关性，而且真正实现了水印图像加密，安全性更高。水印嵌入采用均值量化将加密图像行嵌入到载体音频段的小波包低频分解系数中，建立加密图像行和音频段间的对应关系；检测时通过篡改评估函数对篡改程度度量，实现了音频作品的内容完整性认证。实验结果表明，该方案对常规操作有很强的鲁棒性，对剪切、替换等恶意处理篡改定位精确。
제출일개기우초혼돈가밀적반취약음빈수인방안。해방안이용초혼돈서렬대도상수인진행가밀，불부능소제수인도상상린상소적상관성，이차진정실현료수인도상가밀，안전성경고。수인감입채용균치양화장가밀도상행감입도재체음빈단적소파포저빈분해계수중，건립가밀도상행화음빈단간적대응관계；검측시통과찬개평고함수대찬개정도도량，실현료음빈작품적내용완정성인증。실험결과표명，해방안대상규조작유흔강적로봉성，대전절、체환등악의처리찬개정위정학。
A semi-fragile audio watermarking scheme based on hyper-chaos encryption is proposed.This algorithm has following features:1) eliminates the pertinence of adjacent pixels to watermarking image and truly realises the watermarking image encryption with higher safety by using hyper-chaos sequence to encrypt image watermarks; 2 ) uses mean quantification in watermark embedding, that is to embed the encrypted image line into wavelet packet low frequency coefficients of carrier’s audio section to establish the relationship between them;3) measures the tamper degree in detection process with tampering assessment parameters, and accomplishes the authentication on content integrity of the audio works.Experimental results show, the algorithm has good robustness against conventional operation and accurate localisation on tamper and malicious attacks such as shearing and replacement attacks.