一种改进的面向MPEG的区域DCT数字水印方法

AN IMPROVED DCT-BASED DIGITAL WATERMARKING METHOD TOWARD MPEG

研究了一种改进的基于DCT的MPEG视频水印技术 ,利用MPEG标准的压缩方法及视频流的特点 ,主要讨论了基于帧内编码的水印嵌入方法 ,并详细给出了有关算法设计实现的过程及仿真结果。实验证明本方法嵌入的水印不仅能够很好的在MPEG压缩中生存 ,同时能够防御多种干扰和攻击 。

An improved DCT-based digital watermarking technique is proposed in this article. Through analysis of MPEG standard, different watermarking schemes are given for intra-frames and non-intra-frames respectively. The whole method and its implementation are presented in detail. Several experimental results have demonstrated that the proposed watermarking algorithm is robust against some typical attacks in terms of geometric clipping and linear interpolation. It is hoped the proposed method can be effectively applied to Web based video applications.