Localization Models Navigation & Access Summaries Views Variations Basic Tools User Interaction User Preferences User History

(MDS) description tools [1]. The MPEG-7 MDSs provide the description mechanisms of representing structural and semantic information embedded in multimedia contents. The structural and semantic information of multimedia contents can be described based on the content description such as Structure DS and Semantic DS, respectively. The information regarding the creation and production, media, usage of the multimedia contents are described using the Creation&Production description tools, Media description tools and Usage description tools. Audiovisual abstraction summary can be obtained by the Summary DS and content navigation and access can also be made possible via MPEG-7 description (metadata) by the View description and Variation description tools On the other hands, the video descriptors and audio descriptors allow for describing the characteristics of audiovisual contents characterized as low-level features such as color, texture, shapes motion, tempo, rhythm etc. Figure 2 represents the overview of MPEG-7 Visual Descriptors