| Project/Area Number |
12650401
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
情報通信工学
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| Research Institution | Waseda University |
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Principal Investigator |
YASUDA Yasuhiko School of Science and Engineering, Professor, 理工学部, 教授 (40013106)
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| Co-Investigator(Kenkyū-buntansha) |
KATTO Jiro School of Science and Engineering, Associate Professor, 理工学部, 助教授 (70318765)
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| Project Period (FY) |
2000 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2002: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2001: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2000: ¥1,800,000 (Direct Cost: ¥1,800,000)
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| Keywords | stream caching / distributed caching / hierarchical caching / web friendly / hierarchical coding / cache replacement / cache pre-fetching / content delivery network / Webキャッシュ / ストリーミング / 階層キャッシュ / Content Delivery Network / プリフェッチ / ルータ / TCP |
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| Research Abstract |
We investigated technologies on video streaming and related issues as follows:
(1) Distributed/hierarchical caching algorithms for video streaming
Classical web caching mechanisms cannot be directly applied to video streaming due to huge size of video data. To overcome this problem, several algorithms were investigated, such as splitting video data into small segments and by introduction of hierarchically located cache servers that cooperate in a distributed manner. Results were presented at international conferences and, with merged with the next topic, submitted to IEICE Transactions (accepted).
(2) Web-friendly streaming caching algorithms
Stream caching technologies should avoid performance degradation of current web caching methods that are widely deployed. We then proposed "web-friendly" stream caching algorithms that exploited statistical characteristics of web objects and streaming objects in a unified manner.
(3) Improvement of caching algorithms for hierarchical image format
Improved caching algorithms for hierarchically represented image data format were investigated. Development replacing/pre-fetching algorithm according to preference statistics and theoretical analysis of the web access model were carried out. Results were presented at international conferences, submitted to IEICE Transactions (accepted), and contributed to the above two topics on video stream caching.
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