Sequence Watermarking Robust to Random Geometrical Attacks  

作　　者：ZHAO Yao 

机构地区：[1]Institute of Information Science, Beijing Jiaotong University, Beijing 100044, China

出　　处：《Chinese Journal of Electronics》2006年第4期634-637,共4页电子学报（英文版）

基　　金：This work is supported in part by the National Natural Science Foundation of China （No.90604032, No.60373028）, Specialized Research Fund for the Doctoral Program of Higher Education, Program for New Century Excellent Talents in University and Specialized Research Foundation of BJTU.

摘　　要：A novel video watermarking scheme is pro- posed in this paper. In the scheme, a new geometrical invariance---Average AC energy （AAE） and discrete Walsh transform are used to embed watermark signal and resist geometrical transforms. Each frame of the original video is first Walsh transformed, and then the AC energy of the frame is modified according to watermark signal. Considering both video quality and robustness against compression or any other spatial processing, only low and mid range frequency AC coefficients are modified. Experimental results show that the scheme can efficiently withdraw random geometrical attacks and MPEG1 low bit rate compression, meanwhile keep better visual quality compared with traditional methods.

关 键 词：WATERMARKING Geometrical transform attacks Discrete Walsh transform. 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]