铁道学报
鐵道學報
철도학보
2015年
2期
64-69
,共6页
双功能水印%混合域%版权保护%内容认证
雙功能水印%混閤域%版權保護%內容認證
쌍공능수인%혼합역%판권보호%내용인증
dual function of watermarking%hybrid domain%copyright protection%content authentication
本文提出一种基于混合域的双功能水印算法，能同时实现对数字音频的版权保护与内容认证。该算法根据水印的大小将原数字音频分段，对每一段进行多级DW T变换，并选取低频分量嵌入鲁棒水印，高频分量嵌入脆弱水印，检测时两种水印独立盲提取。仿真实验表明，此算法中的鲁棒水印信号在常见的音频信号处理中具有强鲁棒性，可用于音频版权保护；而脆弱水印信号不仅对常见的信号处理操作敏感，而且能对篡改区域进行较准确的定位。
本文提齣一種基于混閤域的雙功能水印算法，能同時實現對數字音頻的版權保護與內容認證。該算法根據水印的大小將原數字音頻分段，對每一段進行多級DW T變換，併選取低頻分量嵌入魯棒水印，高頻分量嵌入脆弱水印，檢測時兩種水印獨立盲提取。倣真實驗錶明，此算法中的魯棒水印信號在常見的音頻信號處理中具有彊魯棒性，可用于音頻版權保護；而脆弱水印信號不僅對常見的信號處理操作敏感，而且能對篡改區域進行較準確的定位。
본문제출일충기우혼합역적쌍공능수인산법，능동시실현대수자음빈적판권보호여내용인증。해산법근거수인적대소장원수자음빈분단，대매일단진행다급DW T변환，병선취저빈분량감입로봉수인，고빈분량감입취약수인，검측시량충수인독립맹제취。방진실험표명，차산법중적로봉수인신호재상견적음빈신호처리중구유강로봉성，가용우음빈판권보호；이취약수인신호불부대상견적신호처리조작민감，이차능대찬개구역진행교준학적정위。
A dual function of watermark scheme in hybrid domain is proposed ,which can realize both the digital audio copyright protection and content authentication . Firstly , the original digital audio is decomposed into many segments according to the size of the watermark . Secondly , the DWT is performed on each audio seg‐ment .Finally ,robust watermark is embedded in the low‐frequency component while the fragile watermark is embedded in the high frequency component .Independent blind detection was achieved for both robust and frag‐ile watermarks .Simulation experiments show that the robust watermark can be used for audio copyright pro‐tection ,because the signal has strong robustness in common audio signal processing ;while the fragile water‐mark is sensitive to common signal processing operations , and may have accurate location for tampered area .
