水印通信模型及信息恢复

Communication Model and Information Retrieval in Digital Watermarking

数字水印是一种将版权信息隐蔽地嵌入到原始数据中的技术,在过去的几年中得到了广泛的研究和应用。每个水印系统都包含两个主要组成部分:水印嵌入和水印提取/检测。近年来对水印的理论分析表明,数字水印与通信系统有着直接的联系。这种联系在设计高效优化的水印检测器时显得尤为重要。着重讨论在通信理论的基础上怎样设计优良的水印检测器。

The concept of digital watermarking consists of inserting information into the original signal under the condition that the modifications are not perceptible. The technique has gained a large interest in both research and industry in the past few years. Every watermarking system has two main parts： watermark embedding and watermark extraction/detection. Recent developments in the theoretical analysis of digital watermarking schemes have shown that there is a direct link between digital watermarking and communication theory. The link is extremely helpful when it comes to the designing of efficient and optimal watermark detectors. In this article we will focus on how to design a good watermark with the basics of comunication theory.