摘要
根据MPEG-4压缩视频的原理,提出了一种基于DCT域的MPEG-4视频水印技术的设计方法,并详细给出了有关算法设计实现的过程及仿真试验结果.该方法将水印信息经Arnold置乱后嵌入到视频I帧的色度DCT直流系数(DC)中,水印嵌入和提取时不需要完全解码,大大减少了运算的复杂度,提高了实时性.另外由于嵌入到色度DCT的直流系数中,所以可在保证视频效果不失真的前提下,使水印具有很强的健壮性.
A design method of MPEG-4 video watermark technology based on DCT domain was developed according to the MPEG-4 compressed video principle. The design and realization processes of the corresponding algorithm, as well as simulation results were given. After Arnold scrambling, the watermark is directly embedded into direct current coefficient in DCT domain of I-VOP. With embedding and extracting the watermark, it is unnecessary to decode completely. Therefore, the complexity of the operation is greatly decreased, and the real-time gets enhanced. Experimental results show that the watermark embedded through the proposed algorithm is invisible and robust.
出处
《沈阳工业大学学报》
EI
CAS
2007年第2期188-191,共4页
Journal of Shenyang University of Technology
