【作者】 丁元玉；

【导师】 郑晓势；

【作者基本信息】 山东轻工业学院 ， 计算机应用技术， 2011， 硕士

【摘要】 随着网络普及与发展,数字产品的共享变得越来越容易和频繁,多媒体作品的版权保护问题已经迫在眉睫,数字水印技术作为数字产品版权保护的主要手段,对其进行研究的必要性也越来越明显。水印信息隐藏在数字作品中,并伴随着数字作品的传播而传播,因此水印技术很容易受到各种各样有意或无意的攻击。为了确保视频水印的鲁棒性,对视频水印常见攻击的防范方法的研究是一项至关重要的工作。本文的主要内容包括两部分:第一部分是在分析课题研究背景、研究现状、研究内容的基础上,描述了视频水印的基本原理、典型算法、常见攻击类型及研究难点,然后详细阐述了视频水印常见攻击中的一种——拷贝攻击的实施方法和影响后果,最终提出了一种全新的视频水印生成方法,使用该算法嵌入水印的视频水印系统能有效抵抗拷贝攻击。第二部分介绍了“基于随机理论的视频水印系统”中“水印提取部分”的开发过程,水印的提取方法依赖于水印的嵌入方法。该系统的功能特点是实现同一视频可同时选择多种不同的水印算法嵌入和提取水印,同时每种算法可以实现嵌入比例可调。“水印提取”时,不仅可以识别水印信息,而且可以识别所使用的水印嵌入算法。本篇论文的目标是提出一种全新的视频水印算法,这种算法可以有效抵抗拷贝攻击,这不仅增强了视频水印系统的鲁棒性,而且为水印的研究方法提供了一种新的思路。“基于随机理论的视频水印系统”为视频水印的随机理论研究提供了必要的工具,同时也丰富了实践项目经验。更多还原

【Abstract】 With the popularization and development of the network, the sharing of digital products becomes more easily and frequently. The copyright protection of multimedia works is imminent. Digital watermarking technology is the primary means to protect digital copyright. So the necessary of study is evident. Digital watermark information hidden in the digital works, along with the spread of digital works, thus the watermark is vulnerable to a variety of intentional or unintentional attacks. To ensure the robustness of video watermarking, study on video watermarking against common method of attack is a critical task.The main content consists of two parts: the first is based on the analysis of the research background, current status, study content; describes the basic principles of video watermarking, the typical algorithm of common attack types and difficulty, and then elaborates on one of the watermarking against common attacks - copy attack and the impact of the implementation methods, ultimately proposes a new video watermarking generation method, using the algorithm embedded watermark video watermarking system can resist copy attack. The second part introduces the development process of "watermark extraction part" in the "random theory based video watermarking system ", features of the system is to achieve that the same video can choose different watermark embedding and extracting watermarking algorithm, and also each algorithm embedded proportion can be adjusted. While "Watermark extraction", the system can not only identify watermark information, but also identify the watermarking algorithm used.Goal of this thesis is to propose a new video watermarking algorithm, which can effectively resist copy attack, which not only enhances the robustness of video watermarking system, but also provides a new way of thinking for the watermark. "Random theory based video watermarking system" provides the necessary tool for the random theory research of video watermarking, and services as a wealth of practical project experience.更多还原