A Sliding-Window Approach to Supporting On-Line Interactive Display for Continuous Media

To e ciently support continuous display for continuous media many approaches based on the striping strategy that is implemented on a multi disk drive have been proposed However the striping strategy can only support simultaneous display of continuous media which are predetermined before they are stored in the multi disk drive For an interactive display application a system must support users to make any choice of objects for display even when display has started Although Shahabi et al have proposed the replication and prefetching strategies for interactive display of continuous media the combination of objects for display and the branch points for choices both have to be predetermined Based on their strategies they have to consider all the possible cases according to the given the combination of objects and the branch points of choices it will require a lot of additional overhead of space and time To reduce the overhead in this paper we will propose a sliding window approach to supporting interactive display for continuous media in which we only record a little necessary information of retrieval of the following subobjects for display in a sliding window For the way of interactive display described above in which the combination of objects for display and the branch points for choices are predetermined we call it off line interactive display As opposed to off line an on line interactive display is the one in which the combination of objects for display and the branch points for choices are dynamically determined To support on line interactive display we will extend the sliding window approach to the dynamic sliding window approach In this dynamic sliding window approach the size of the sliding window can be changed according to the future requirements of data for display