To eHicieiitly support continuous cUsplay for continuous media, many approaches based on the striping strategy that is implemented on a multi-disk drive liave been proposed. Ho\vever, the striping strategy can only support simultaneous display of continuous media wliicli are predetermined before t} iey are stored in tlie multi-disli drive. For an interactive display application, a system must support users to make any clioice of objects for display even when disp! ay has started. Altliougli Slialiabi 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 aH the possible cases according to the given the combination of objects and the branch points of choices; it\vill require a lot of additional overhead of space and time. To reduce the overhead, in this paper, we\vill propose a sliding window approach to supporting interactive display for continuous media, in\vhich we only record a little necessary Information ofretrieval of the following subobjects for display in a sliding window. For the\vay of interactive display described above, in which the combination of objects for display and the branch points for choices are predetermined,\ve 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 dgnamic sliding vjindoiu approach. In this dgnamic sliding uiindcnu approach, the size of the sliding window can be changed according to the future requirements of data for display.

1 Introduction bandwidth while a current typical magnetic disk drive has only an 80 Gbit capacity and approximately a 20 Some media (such as audio and video) are classified Mbps bandwidth. In general, conventionalfilesystems as continuous because they consist of separate media are unable to guarantee that clients can access contin-quanta (such as audio samples or video frames), which uous media in a way that permits delivery deadlines convey meaning only when presented in time. Sev-to be met under normal buffering conditions. Thereeral multimedia types, video, in particular require high fore, finding a way to support continuous retrieval bandwidths and large storage space. For example, one of multimedia data at the required bandwidth and a hour and a half of video based on HDTV (High Defini-way to store the multimedia data are challenging tasks tion Television) quahty images has approximately 36 [2, 5, 7, 13, 14, 21]. In this paper, for convenience, we Gbits of data and requires approximately a 100 Mbps use an object to denote an object of digital continuous