Computer Graphics & A Real-Time Disk Prefetch Scheme for Continuous Media Playback 


Vol. 11,  No. 7, pp. 547-554, Dec.  2004
10.3745/KIPSTA.2004.11.7.547


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  Abstract

To play back CM(Continuous Media) in online mode, the multimedia system is required to have a real-time disk scheduling scheme that can efficiently fulfill the strict temporal constraints of servied CM streams to prevent hiccups. In general, such disk scheduling is performed based on the concept of periodic prefetching since a CM stream has a rather long playback time. In this paper, we also propose a periodic perfetching scheme that runs by using real-time disk channels, called on-time delivery channels. Since the channels are genereted from the bulk-SCAN algorithm and they can be allocated in a very flexible manner based on the EDF (earliest-deadline-first) algorithm, the proposed scheme provides a better performance in terms of I/O throughput and the aterage response time, as well as hiccup-free playback of concurrent CM streams. To show that the proposed scheme outperforms other methods, we give some simulation results.

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[IEEE Style]

S. C. Lim, "Computer Graphics & A Real-Time Disk Prefetch Scheme for Continuous Media Playback," The KIPS Transactions:PartA, vol. 11, no. 7, pp. 547-554, 2004. DOI: 10.3745/KIPSTA.2004.11.7.547.

[ACM Style]

Sung Chae Lim. 2004. Computer Graphics & A Real-Time Disk Prefetch Scheme for Continuous Media Playback. The KIPS Transactions:PartA, 11, 7, (2004), 547-554. DOI: 10.3745/KIPSTA.2004.11.7.547.

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