Multimedia Synchronization Research Of Multimedia Database

~tASTER S THESIS IAbstractl With the development of the hardware and software technology of the computer, multimedia, the new generation technology, has come forth in the need of more friendly user-interface and multiple information processing ability. For the characters of digital, interactivity and integration , multimedia has got wide and deep use in CAL, publishing and printing, computer emulation ect. With more and more applications of multimedia, the demand of using advanced database technology to store, manage and synthesize multimedia data fasten the emergence and development of multimedia database management system. In the contrast to traditional relational database, multimedia database has many new technological characters such as large data amount, isochronism and synchronization , non- structural, special user operation and retrieval based on content ect . Nowadays the main research areas of multimedia database are multimedia data modeling, multimedia presentation and synchronization modeling , the architecture of multimedia database, retrieval and query based on content and new user interface ect. First , in this paper some popular multimedia synchronization modeling methods such as timeline model, reference point model and hierarchy model are analyzed and compared .The merit and shortcoming of theirs are discovered. Then the request analysis of multimedia synchronization model of multimedia database are discussed . Because inheritance, capsulation and polymorphism of object- oriented theory are fit for the character of multimedia, the object-oriented model are used as conceptual model to modeling multimedia data . But the character of 昳ntegration and reference is not enough to describe the synchronization relationship of multimedia objects . So except the 00-conceptual model , based on TSPN, we put forward a new multimedia synchronization model . In multimedia synchronization request analysis of CAL software , we can find that a good synchronization model should sustain unifonn logical , inter-stream and intra- stream synchronization modeling. The LIETSPN has reached the demand. Because HETSPN is based on TSPN and apply TSPN describe the synchronization relationship in logical , composite and atomic layer , it can model the multimedia application in a uniform way ; typed place sustain not only hyper-media structure but also hierarchy modeling ,which makes the scale of synchronization easy controlled ; user participation on scenario level remedy the shortcoming of TSPN; scenario expression and semantic changing in transaction offset the weakness of many synchronization models . Finally we give the application example of HETSPN and its computer simulation ,which indicates that this model provide the good ability of modeling hypermedia architecture , temporal and spatial synchronization and user participation on scenario level.