射频水印系统中的同步算法  

Watermarking synchronization in RF watermarking system

作　　者：赵军[1] 余松[1] 葛云露[1] 王先义[1] 

机构地区：[1]中国电波传播研究所青岛研发中心,山东青岛266107

出　　处：《电波科学学报》2012年第3期465-469,共5页Chinese Journal of Radio Science

摘　　要：射频水印系统中的水印同步是一个技术难点,当前的水印同步算法因为缺乏帧同步位识别能力而效率较低。提出了一种利用水印图像清晰度评价技术识别帧同步位的方法。该方法通过水印图像清晰度评价函数最大值与帧同步位的对应关系,建立了独立的帧同步过程,解决了原水印同步算法需要逐位搜索的难题,能够有效缩短水印同步时间。通过仿真实验验证了这一结论。Watermarking synchronization in radio frequency（RF） watermarking system is a technical difficulty.Lacking the ability of frame synchronization recognition,present watermarking synchronization algorithms is inefficiency.In this paper,a method of frame-sync recognition using the technology of watermarking image definition evaluation is proposed.This method uses the corresponding relation between the max value of watermarking image definition evaluation function and frame-sync,establishes independent frame-sync process to slove the problem which needs searching bit by bit in the old watermarking synchronization algorithms,and shortens the time of watermarking synchronization efficiently.The simulation experiments proves the conclusion.

关 键 词：射频水印 水印同步 

分 类 号：TN011.72[电子电信—物理电子学]