Considerations on a model for video data

Video data are rich of implicit information that cannot be efficiently managed by a computer when they are stored as unstructured linear streams. To allow a computer to efficiently deal with this kind of information is necessary to add some further information that offers a high level representation of what is contained in video data. This paper addresses the issues of defining a video data model. First a brief survey of the current approaches is presented then there is a proposal of a video model. The proposed model distinguishes between video data and video presentations. It allows to retrieve and browse video data and video presentations. and to build presentations.