通过公共事件感知元数据模型验证MPEG-7和MPEG-21语义
Reconciling MPEG-7 and MPEG-21 Semantics through a Common Event-Aware Metadata Model
摘要：
在开发用于描述和管理多媒体内容的元数据模型时，“事件”概念反复出现。在多媒体内容的典型生存周期期间，事件发生在许多不同的级别-从在内容创建期间发生的事件（导演，表演，摄像机平移和变焦）发生在物理形式上的事件（胶片或视频的获取、重新定位、损坏）到数字转换、重新格式化、编辑和重新包装事件，到实际内容中描述的事件（政治、新闻、体育）到使用、所有权和版权协议事件以及甚至元数据归属事件。MPEG-7和MPEG-21都需要支持对所有这些事件类型的清晰和明确的描述，这些事件类型可能发生在不同的嵌套和粒度级别上。在本文中，我们首先描述了一个事件感知模型（ABC模型），它能够建模，但清楚地区分所有这些，往往是递归和重叠的事件。然后，我们说明了这个模型可以用来作为基础，以促进MPEG-7和MPEG-21之间的语义互操作性。通过在RDF Schema中表达MPEG-7和MPEG-21元数据术语的语义，（和一些DAML+OIL扩展）并将MPEG-7和MPEG-21类和属性层次结构附加到ABC模型的适当顶层类和属性，我们基本上能够定义单个分布式机器可理解本体，这将使得能够在整个多媒体内容传递链上实现数据和服务的互操作性。
英文摘要：
The "event" concept appears repeatedly when developing metadata models for the description and management of multimedia content. During the typical life cycle of multimedia content, events occur at many different levels - from the events which happen during content creation (directing, acting, camera panning and zooming) to the events which happen to the physical form (acquisition, relocation, damage of film or video) to the digital conversion, reformatting, editing and repackaging events, to the events which are depicted in the actual content (political, news, sporting) to the usage, ownership and copyright agreement events and even the metadata attribution events. Support is required within both MPEG-7 and MPEG-21 for the clear and unambiguous description of all of these event types which may occur at widely different levels of nesting and granularity. In this paper we first describe an event-aware model (the ABC model) which is capable of modeling and yet clearly differentiating between all of these, often recursive and overlapping events. We then illustrate how this model can be used as the foundation to facilitate semantic interoperability between MPEG-7 and MPEG-21. By expressing the semantics of both MPEG-7 and MPEG-21 metadata terms in RDF Schema (and some DAML+OIL extensions) and attaching the MPEG-7 and MPEG-21 class and property hierarchies to the appropriate top-level classes and properties of the ABC model, we are essentially able to define a single distributed machine-understandable ontology, which will enable interoperability of data and services across the entire multimedia content delivery chain.
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