Science Letters:A new asymmetric watermarking scheme based on a real fractional DCT-I transform  

作　　者：桂国富 蒋铃鸽 何晨 

机构地区：[1]Department of Electronic Engineering,Shanghai Jiao Tong University, Shanghai 200240, China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2006年第3期285-288,共4页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：Project (Nos. 60372076 and 60272082) supported by the National Natural Science Foundation of China

摘　　要：A new asymmetric watermarking scheme is proposed in this letter. In the proposed scheme, a secret real fractional DCT-I transform and a primitive watermark are employed to generate an asymmetric watermark. The secret watermark for em-bedding is derived from the primitive watermark, and is embedded in the large fractional DCT-I transformation coefficients of a cover signal. The asymmetric detection procedure is performed using a correlation test. Simulation results showed that the asymmetric detection is reliable, and that the scheme can provide minimum security.A new asymmetric watermarking scheme is proposed in this letter. In the proposed scheme, a secret real fractional DCT-I transform and a primitive watermark are employed to generate an asymmetric watermark. The secret watermark for embedding is derived from the primitive watermark, and is embedded in the large fractional DCT-I transformation coefficients of a cover signal. The asymmetric detection procedure is performed using a correlation test. Simulation results showed that the asymmetric detection is reliable, and that the scheme can provide minimum security.

关 键 词：Asymmetric watermarking DCT-I Fractional transforms 

分 类 号：TN911.7[电子电信—通信与信息系统]