By Taeseok Kim, Hyokyung Bahn, Kern Koh (auth.), Yo-Sung Ho, Hyoung-Joong Kim (eds.)
We are overjoyed to welcome readers to the complaints of the sixth Pacific-Rim convention on Multimedia (PCM). the 1st PCM was once held in Sydney, Australia, in 2000. on account that then, it's been hosted effectively by way of Beijing, China, in 2001, Hsinchu, Taiwan, in 2002, Singapore in 2003, and Tokyo, Japan, in 2004, and at last Jeju, the most attractive and significant islands in Korea. This 12 months, we accredited 181 papers out of 570 submissions together with typical and detailed consultation papers. The popularity fee of 32% shows our dedication to making sure a really fine quality convention. this might now not be attainable with out the whole aid of the superb Technical Committee and nameless reviewers that supplied well timed and insightful stories. we might consequently wish to thank this system Committee and all reviewers. this system of this yr displays the present pursuits of the PCM’s. The accredited papers hide a number issues, together with, all points of multimedia, either technical and creative views and either theoretical and functional concerns. The PCM 2005 software covers educational periods and plenary lectures in addition to ordinary shows in 3 tracks of oral classes and a poster consultation in one tune. we now have attempted to extend the scope of PCM to the inventive papers which needn't to be strictly technical.
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Extra resources for Advances in Multimedia Information Processing - PCM 2005: 6th Pacific Rim Conference on Multimedia, Jeju Island, Korea, November 13-16, 2005, Proceedings, Part II
201–207, 2000 8. Jung-Min Choi, Seung-Won Lee, Ki-Dong Chung: A Muticast Delivery Scheme for VCR Operations in a Large VOD System. 555–561, June 2001 An Eﬀective Failure Recovery Mechanism with Pipeline Computing 23 9. org/ 10. T. Chang, S. Shim, and D. Du: The Designs of RAID with XOR Engines on Disks for Mass Storage Systems. 181–186, March 1998 11. Prashant J. Shenoy, Harrick M. Vin: Failure recovery algorithms for multimedia servers. 1–19, 2000 12. Leana Golubchik, Richard R. Muntz, Cheng-Fu Chou, Steven Berson: Design of Fault-Tolerant Large-Scale VOD Servers: With Emphasis on High-Performance and Low-Cost.
To rebuild the video blocks stored in the failure MMS node, sequential several exclusive OR stages are necessary. For each stage, the two blocks are needed to compute exclusive OR operation at a time. Based on this characteristic, the stages are distributed into MMS nodes so that the network saturation in the recovery node is solved. In addition, the CPU computing power of MMS nodes can be utilized without impairing the QoS streams. Fig. 2 shows the architecture of RS-PCM and the ﬂow of video blocks in the VODCA server.
Figure 4 shows the performances comparison among re-caching algorithm, Greed algorithm, and the proposed replacing algorithm when the request rate is changed. Now, the normalized cost is defined by the total reduction cost/the total cached size. The re-caching means that the proxy server executes the proposed caching algorithm with the new request rate after removing all cached data. As shown in Figure 4, both the re-caching and the proposed replacing algorithm can provide almost same efficiency, but the performance of Greed algorithm seriously deteriorates.