【作者】 姜伟伟；

【导师】 郭继昌；

【作者基本信息】 天津大学 ， 电路与系统， 2009， 硕士

【摘要】 随着人们生活水平的提高,人们对视频享受的要求也一直在不断的提高,从黑白电视到彩色电视,从模拟电视到高清数字电视。现在,人们对视频的观看已经不仅停留在平面视频的水平上,而是过渡到了立体视频的时期。随着立体显示技术的发展,有关三维(3D)视觉的研究逐渐升温。作为表征3D视频信号的重要方式,多视点视频的研究已成为目前图像视频领域的重要研究方向。多视点立体视频本身合成困难、数据量大且难于传输,这些问题一直是制约多视点立体视频技术产业化和实用化的主要瓶颈,因此,必须对原始视频进行有效的压缩处理,以适应立体视频技术发展的要求。联合视频专家组正在积极研究开发的H.264的扩展集中包括多视点视频编码MVC(Multi-view Video Coding)。MVC继承了H.264的优异性能:高质量的编码效率,自由的编码结构,良好的网络兼容性,同时MVC还增加了时间的可分级性,视点可分级性,光照补偿,视点间预测等编码工具,非常适用于立体视频的压缩编码。本文首先介绍了立体视频的发展历史和研究情况,然后从人类视觉系统特性开始,介绍了立体视觉和立体显示的各种理论。接着,介绍了H.264编码标准,提出了基于H.264的多视点视频编码方案,并研究了联合多视点视频编码方案,对联合多视点视频模型的各个参数进行了总结,并对其中的运动估计做了详细分析,此模型可以实现高分辨率的视频编码,最后用实验验证了联合多视点视频编码方案的编码效率和压缩率等内容。更多还原

【Abstract】 With the improvement of people’s living standards, the requirements of video quality have been becoming more and more demanding, for example, from analog TV to HDTV. Nowadays, people watch multi-view three-dimensional TV instead of complanate video. Studies on three-dimensional (3D) vision draw more and more of people’s attention due to advancements in the 3D display technologies. As a critical component of 3D display technology, multi-view stereo video has become one of the important research orientations recently. Multi-view stereo video itself is difficult to be composite and has a large amount of data, which make it hard to be transmitted. The above problem has become the bottleneck that prevents the multi-view stereo video from industrialization and application. Therefore, effective compression of original data is needed to accommodate the demands from stereo video technology.Joint Video Team is researching on the development of the H.264 extension, including Multi-view Video Coding (MVC), which inherits the merits of H.264. These are high-quality coding efficiency, free coding structure and good network compatibility. Besides, several new coding tools such as temporal scalable structure, viewpoint scalability and illumination compensation, which suits very well for stereo video compression, are added to MVC structure.First of all, the history and research status of stereo video are introduced. In addition, several theories on stereo video and stereo display are presented. In the following chapters, H.264 coding standard is given, Multi-view stereo video coding scheme based on H.264 is proposed, Joint Multi-view Video Model (JMVM) coding scheme is researched, Joint Multi-view Video Model parameters are summarized, and Motion Estimation is analyzed in detail. The Multi-view Joint Video Model can realize high-resolution video encoding. Finally its coding efficiency and compression ratio are verified in experiments.更多还原