Advances in Multimedia Information Processing - PCM 2005: by Taeseok Kim, Hyokyung Bahn, Kern Koh (auth.), Yo-Sung Ho,

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 used to be held in Sydney, Australia, in 2000. considering then, it's been hosted effectively through Beijing, China, in 2001, Hsinchu, Taiwan, in 2002, Singapore in 2003, and Tokyo, Japan, in 2004, and eventually Jeju, probably the most attractive and significant islands in Korea. This yr, we accredited 181 papers out of 570 submissions together with general and designated consultation papers. The popularity expense of 32% exhibits our dedication to making sure a truly high quality convention. this is able to no longer be attainable with no the entire help of the wonderful Technical Committee and nameless reviewers that supplied well timed and insightful stories. we might for this reason prefer to thank this system Committee and all reviewers. this system of this yr displays the present pursuits of the PCM’s. The accredited papers conceal a number of themes, together with, all points of multimedia, either technical and inventive views and either theoretical and useful concerns. The PCM 2005 software covers instructional periods and plenary lectures in addition to normal displays in 3 tracks of oral periods and a poster consultation in one song. now we have attempted to extend the scope of PCM to the creative papers which don't need to to be strictly technical.

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In this work, we propose a dynamic caching algorithm that provides a solution close to the globally optimal solution with a relatively low computational complexity. Now, the beneficial value is defined by µj = ( γ Oj (i ) j j O j (i ) (18) , R γ Oj ( i ) = α ⋅ λ j ⋅ BW j ( O j (i − 1) ) − BW j ( O j (i) ) j ( ) ) + (1 − α ) ⋅ λ ⋅ B ( O j (i − 1) ) − B ( O j (i ) ) , j j j where, O j (i ) is the frame number of the ith cached frame in the jth video. Now, the pseudo code of the proposed dynamic caching algorithm is summarized in the followings.

Fig. 5. Performance comparison of PRIC and other caching schemes (cont’d) Efficient Cache Management for QoS Adaptive Multimedia Streaming Services 9 5 Performance Evaluation In this section, we present the performance results for various streaming conditions to assess the effectiveness of our scheme. We modeled a streaming server architecture with various parameters such as the cache size, the inter-arrival time, and the object size. We conducted extensive simulations to compare the performance of our scheme with those of IC (interval caching), LRU (Least Recently Used), and MRU (Most Recently Used).

From the implemented VOD server, the RS-BRM was designed with the advantage of RAID-4 in disk retrieving speed and the advantage of RAID-3 in effective memory usage. However, in the RS-BRM, it was found that the input network path of a recovery node was easily saturated with the video blocks transmitted from the survived MMS nodes. To address these issues, the RS-PCM based on the pipeline computing was proposed over the MMS nodes and a recovery node. In the RS-PCM, the recovery 22 D. Seo et al. node generated a rebuilt video block and sent it to the client just one time for each cycle.

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