CAJ | 학술논문

针对传统最低有效位水印算法鲁棒性差的特点，提出一种改进的新算法。用一维Logistic变换对秘密水印信息进行置乱预处理，使水印信息变成乱码；对公开的载体语音进行离散小波变换；采用一种新颖的LSB嵌入方案，以不同的分辨率将秘密信息嵌入到选定的小波系数中。提取水印信息时不需要原始音频，是一种盲提取算法。实验结果表明该算法的容量较大，并且在受到重采样、裁剪等攻击时具有良好的鲁棒性。
침대전통최저유효위수인산법로봉성차적특점，제출일충개진적신산법。용일유Logistic변환대비밀수인신식진행치란예처리，사수인신식변성란마；대공개적재체어음진행리산소파변환；채용일충신영적LSB감입방안，이불동적분변솔장비밀신식감입도선정적소파계수중。제취수인신식시불수요원시음빈，시일충맹제취산법。실험결과표명해산법적용량교대，병차재수도중채양、재전등공격시구유량호적로봉성。
In view of the low robustness of least significant bits ( LSB) algorithm, a new algorithm for enhancing its robustness to illegal attacks is proposed.The algorithm performs scrambling pre-treatment using Logistic chaotic on the secret watermarking information to make watermarking bits garbled .The public audio signal is transformed by DWT , so that the secret information is embedded into the selected wavelet coefficients with multi-resolution.The original carrier is not required in wa-termarking recovery, i.e.is a blind extracted algorithm.Experimental results show that the capacity of the algorithm is high , and its robustness and resitance to illegal attacks , such as resample and cropping , is also superior .