机构地区: 浙江大学信息与电子工程学系
出 处: 《浙江大学学报(理学版)》 2003年第1期41-45,共5页
摘 要: 随着计算机和网络技术的快速发展.数字水印技术正成为一种数字媒体知识产权保护的有效方法.本文提出一种视频自适应水印新算法,它直接对压缩后的视频数据流进行操作,将水印信息嵌入到运动矢量上.根据待嵌入的水印信息和运动矢量的特征矢量,新算法自动调整嵌入方案,使得嵌入水印后的图像质量损失达到最小.水印的提取算法具有盲检功能.并且新算法与视频压缩标准有很好的兼容性.实验结果表明.算法简单有效. With the fast development of computer and network techniques, digital watermarking is becoming an efficient method for protecting the intellectual property rights of digital products. In this paper, a new adaptive watermarking algorithm is proposed for video image coding. Operating the compressed video data-stream directly, watermark information is embedded into motion vectors. According to watermark information and the feature of motion vector, the new algorithm can adaptively select embedding schemes to get good quality of watermarked-im-age. Moreover, watermark is blindly extracted in the algorithm. Experimental results show that the proposed algorithm is very simple and efficient and has a good compatibility with compression standard.
关 键 词: 视频图像 视频水印 特征矢量 压缩域 自适应水印算法 数字水印 版权保护
领 域: [自动化与计算机技术] [自动化与计算机技术]