【摘要】 多媒体信息系统首先需要对多媒体数据的内容给出尽量全面、详尽的表述,而目前存在的多媒体文档描述接口MPEG-7标准在信息描述能力上存在不足。针对这一问题,论文根据多媒体文档内容的抽象层次分类,提出了一个合理的层次化信息描述方法,并讨论了多媒体文档描述层次间的映射关系。更多还原

【Abstract】 The most important thing of multimedia information system is to provide overall and detailed description of the content of multimedia data.But currently,the description interface of multimedia document ,MPEG-7,has some short-age in providing the description of this information in different layers and granularities.In this paper,we locate the con-tent information of the multimedia documents into three proper layers and define MDU(Multimedia Document basic U-nit)to collect this information in different granularities.And then,we also discuss the relationships among MDUs.Combin-ing the definitions above,we can formalize the presentation of the multimedia documents.An example is provided to ex-plain how to use this presentation method,and we also compare this method with related works.更多还原