Synchronization validation mechanism in multimedia document presentation

Synchronization is the major processing task during multimedia presentation, which defines the time relation between multimedia objects. There are many synchronization specification methods, and each has different advantages and disadvantages. Those methods work well for the simple and specific synchronization case, but when considering large complex multimedia presentation, there lacks an effective method to deal with the complex time relation. In this paper, a synchronization point based specification method (SPM) is proposed, and based on it, a static and dynamic validation mechanism for the synchronization relation is given. In SPM, the synchronization relation is defined in synchronization points (SP). Multimedia presentation control is based on SP´s status during presentation. According to the order of SPs, SPM gives the static and dynamic validation algorithm, which can avoid the conflict relation between SPs. SPM gives a way to define the nondetermined synchronization relation between multimedia objects, and proposes static and dynamic validation mechanisms for complex synchronization control. This synchronization point based mechanism can extend the capability of synchronization definition and control in a multimedia system