提出了一种利用MPEG - 7段描述工具对视频层次化结构模型进行描述的方法，并给出了相应的DDL描述。
In this paper we first propose a method to describe the hierarchy structure model of video with the MPEG-7 segment description tools, and present the DDL description.
最后，结合以上新方法，提出了一种基于MPEG - 7视频语义内容的层次化描述方案。
Finally, according to the new method, we propose a hierarchical video content description scheme under the international standard MPEG-7.
可伸缩性视频转换编码算法是大型分层视频组播系统层次化代理自适应机制的核心技术。
Scalable video transcoding is the key technology of a adaptive mechanism for hierarchical agents in a large-scale layered video multicast.
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