基于MPEG-4的视频水印技术的设计方法  

Design Method of Video Watermark Technology Based on MPEG-4

作　　者：邓华[1] 张继夫[2] 

机构地区：[1]空军航空大学计算机教研室,吉林长春130022 [2]空军航空大学军事仿真技术研究所,吉林长春130022

出　　处：《计算机与现代化》2010年第6期67-70,共4页Computer and Modernization

摘　　要：针对较大容量的版权信息以及MPEG-4压缩格式下的视频水印强鲁棒性的需求,提出一种基于DCT(Discrete Cosine Transform,离散余弦变换)域的MPEG-4视频水印技术的设计方法。该方法综合小波变换、混沌理论及扩频技术对灰度水印图像进行预处理,并根据图像纹理特征复杂情况选择水印的嵌入域,采用改进后的LSB算法将水印信息嵌入到部分解码的MPEG-4视频I-VOP的色度子块的DCT直流系数(DC)中。实验证明,该方法保证了在视频效果不失真的前提下,水印具有很强的鲁棒性。Aiming at the requirements of the copyright information required high capacity and the strong robustness based on MPEG-4,a method of video watermarking which is based on DCT domain in MPEG-4 is proposed. The algorithm synthesizes wavelet transforms,chaos theory and spread frequency technology to do the watermarking pretreatment,and chooses the watermarking embedded domain according to the texture characters of video images. The algorithm,which used for reference of the idea of LSB algorithm,embeds the watermark information into DC component in DCT domain of I-VOP. The experimental results show that the watermark has good invisibility and robustness.

关 键 词：视频水印 MPEG-4 DCT 版权信息 鲁棒性 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]