A Frame Converting Strategy Based on Compensatory Region-based Data Placement Scheme for Interactive Video Servers

Abstract

Of late, zoning technique has been applied on disks to increase their capacities. An effect of disk-zoning is that a disk has higher throughput (bandwidth) in outer zones than in inner zones. To efficiently utilize various band-widths from zones, we propose a compensatory retrieval method based on region-based data placement scheme. Due to the same retrieving of a data block, we can read more data in the outer zones to compensate for the deficit read in the inner zones, which can significantly enhance the disk throughput. From the simulation results and the performance testing of the prototype, it can be seen that our proposed method can improve disk throughput by 25%-35% compared to the original region-based data placement. In addition, we design a frame converting strategy to reconstruct the MPEG data. With the frame converting technique, the compensatory retrieval method can facilitate the interactive operations of video playout for a video server.