The convergence of next-generation Networks and the emergence of new media systems have made media-rich digital libraries popular in application and research. The discovery of media content objects’ usage patterns, w...The convergence of next-generation Networks and the emergence of new media systems have made media-rich digital libraries popular in application and research. The discovery of media content objects’ usage patterns, where QPop Increment is the characteristic feature under study, is the basis of intelligent data migration scheduling, the very key issue for these systems to manage effectively the massive storage facilities in their backbones. In this paper, a clustering algorithm is established, on the basis of temporal segmentation of QPop Increment, so as to improve the mining performance. We employed the standard C-Means algorithm as the clustering kernel, and carried out the experimental mining process with segmented QPop Increases obtained in actual applications. The results indicated that the improved algorithm is more advantageous than the basic one in important indices such as the clustering cohesion. The experimental study in this paper is based on a Media Assets Library prototype developed for the use of the advertainment movie production project for Olympics 2008, under the support of both the Humanistic Olympics Study Center in Beijing, and China State Administration of Radio, Film and TV.展开更多
随着元宇宙概念的兴起,以6自由度(six degree of freedom,6DoF)视频为代表的新一代交互式媒体技术得到产业界和学术界的广泛关注。6DoF视频隶属于多媒体通信领域,通过计算重构的方式向用户提供包括视角、光照、焦距和视场范围等多个维...随着元宇宙概念的兴起,以6自由度(six degree of freedom,6DoF)视频为代表的新一代交互式媒体技术得到产业界和学术界的广泛关注。6DoF视频隶属于多媒体通信领域,通过计算重构的方式向用户提供包括视角、光照、焦距和视场范围等多个维度的媒体交互与内容变化,能使千里之外的用户有身临其境、千人千面之感,与元宇宙具有的感知、计算、重构、协同和交互等技术特征具有高度重合性。因此,6DoF视频涵盖的技术体系可作为实现元宇宙的替代技术框架。本文提出了6DoF视频10个方面的40个问题,并将6DoF视频端到端技术链条归纳为生成、分发和呈现3个宏观阶段,随后围绕这3个技术阶段分别从内容采集与预处理、编码压缩与传输优化以及交互与呈现等方面阐述国内外研究进展。其中,在内容采集与预处理阶段,阐述了多视点联合采集、多视点与深度联合采集、深度图与点云预处理;在视频压缩与传输阶段,阐述了多视点视频编码、多视点+深度视频编码、光场图像压缩、焦栈图像压缩、点云编码压缩、6DoF视频传输优化;在交互与显示阶段,阐述了解码后滤波增强和虚拟视点合成。最后,本文围绕该领域当下的挑战,对未来趋势进行了讨论。展开更多
文摘The convergence of next-generation Networks and the emergence of new media systems have made media-rich digital libraries popular in application and research. The discovery of media content objects’ usage patterns, where QPop Increment is the characteristic feature under study, is the basis of intelligent data migration scheduling, the very key issue for these systems to manage effectively the massive storage facilities in their backbones. In this paper, a clustering algorithm is established, on the basis of temporal segmentation of QPop Increment, so as to improve the mining performance. We employed the standard C-Means algorithm as the clustering kernel, and carried out the experimental mining process with segmented QPop Increases obtained in actual applications. The results indicated that the improved algorithm is more advantageous than the basic one in important indices such as the clustering cohesion. The experimental study in this paper is based on a Media Assets Library prototype developed for the use of the advertainment movie production project for Olympics 2008, under the support of both the Humanistic Olympics Study Center in Beijing, and China State Administration of Radio, Film and TV.
文摘随着元宇宙概念的兴起,以6自由度(six degree of freedom,6DoF)视频为代表的新一代交互式媒体技术得到产业界和学术界的广泛关注。6DoF视频隶属于多媒体通信领域,通过计算重构的方式向用户提供包括视角、光照、焦距和视场范围等多个维度的媒体交互与内容变化,能使千里之外的用户有身临其境、千人千面之感,与元宇宙具有的感知、计算、重构、协同和交互等技术特征具有高度重合性。因此,6DoF视频涵盖的技术体系可作为实现元宇宙的替代技术框架。本文提出了6DoF视频10个方面的40个问题,并将6DoF视频端到端技术链条归纳为生成、分发和呈现3个宏观阶段,随后围绕这3个技术阶段分别从内容采集与预处理、编码压缩与传输优化以及交互与呈现等方面阐述国内外研究进展。其中,在内容采集与预处理阶段,阐述了多视点联合采集、多视点与深度联合采集、深度图与点云预处理;在视频压缩与传输阶段,阐述了多视点视频编码、多视点+深度视频编码、光场图像压缩、焦栈图像压缩、点云编码压缩、6DoF视频传输优化;在交互与显示阶段,阐述了解码后滤波增强和虚拟视点合成。最后,本文围绕该领域当下的挑战,对未来趋势进行了讨论。
