数字水印的关键技术

The Key Technique of Digital Watermark

随着因特网的日益普及,多媒体信息交流达到前所未有的深度和广度,但作品侵权也随之更加容易,篡改也更加方便,因此如何保护作品版权已受到人们的高度重视。数字水印是信息隐藏技术的一个重要分支,是一种全新的数字产品保护技术,它是将特定的数字信息内嵌到图像、音频、视频或软件等各种数字产品中,以达到信息安全和版权保护等目的。着重阐述了数字水印的选择、嵌入技术、提取技术、验证技术、数字水印的重要参数和变量等关键技术,提出了数字水印今后的研究方向,使人们对该技术有一个比较全面的了解。

The digital media has become a main way for information communication along with the popularization of intemet and the development of multimedia techniques, people can get almost information through the intemet. But this gives rise to serious problems including wide spread copyright violation ,illegal copying,easy forging etc. How to provide copyright protection and implement covert communication has drawn extensive attention in recent years. Digital watermarking is an important branch of information hiding and a new technology to protect digital products, which is a process of embedding a watermarking into various digital works, such as images ,audio, video or software and so on,to acquire information security and copyright protection. Focus on the choice of digital watermarking, embeded technology, extraction technology, verification technology, digital watermarking important parameters and variables, in addition, some possible new directions of digital watermarking research are also put forward. Aimed to provide people with a full understanding of it.