摘要
利用混沌动力力学系统中的Logistic映射对水印图像进行置乱处理,并对其采用纠错编码技术,同时引入嵌入同步信号的思想,利用同步信号定位水印的嵌入位置,根据人耳的听觉特性,采用自适应量化调制策略将水印信息嵌入到DCT域系数中。实验结果表明:该算法不仅具有较好的不可感知性,而且对诸如低通滤波、有损压缩、重采样和剪裁等攻击均具有较好的顽健性。
The image watermark is encrypted by the logistic-map sequences in chaotic ing technology is adopted.The idea of embedded synchronic signal introduced in the dynamical systems.And error correct- algorithm is proposed, which uses the synchronic signal for locating the watermark location.The watermark and synchronic signal are embedded into the DCT low frequency components by quantization.The embedding strength is adaptively controlled by the masking threshold.Experiment results show that the proposed watermarking scheme is inaudible and robust against various signal processing such as low- pass filtering,noise adding,re-sampling and cutting.
出处
《计算机工程与应用》
CSCD
北大核心
2010年第22期133-135,156,共4页
Computer Engineering and Applications
基金
上海工程技术大学博士专项启动基金(No.A-2400-08-20)
上海市工程技术大学校青年基金(No.2009xy04)
关键词
数字音频水印
人类听觉特性
离散余弦变换
同步信号
盲水印
digital audio watermarking
human auditory system
discrete cosine transform
synchronic signal
blind watermarking
