On the Design of Peer-assisted Video-on-demand Systems - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook On the Design of Peer-assisted Video-on-demand Systems write by Jiahua Wu. This book was released on 2009. On the Design of Peer-assisted Video-on-demand Systems available in PDF, EPUB and Kindle. Peer-assisted Video-on-Demand (VoD) systems have not only received substantial recent research attention, but also been implemented and deployed with success in large-scale real-world streaming systems. Despite the remarkable popularity in real-world systems, the design of such systems are not well understood. In this thesis, we seek to address two design problems in peer-assisted VoD systems. First, we focus on the design of cache replacement algorithms. We construct an analytical framework based on dynamic programming, to help us form an in-depth understanding of optimal strategies to design cache replacement algorithms. Second, we shift our attention to the surplus upload bandwidth allocation problem in multi-channel systems. Through theoretical analysis and realistic simulations, we conclude that surplus upload bandwidth from peers can be utilized more efficiently than conventional prefetching strategies when it is devoted to redistributing content to those channels in deficit state.
Large-Scale Peer-Assisted Online Hosting, Distribution and Video Streaming Systems
Large-Scale Peer-Assisted Online Hosting, Distribution and Video Streaming Systems - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Large-Scale Peer-Assisted Online Hosting, Distribution and Video Streaming Systems write by Fangming Liu. This book was released on 2019-04. Large-Scale Peer-Assisted Online Hosting, Distribution and Video Streaming Systems available in PDF, EPUB and Kindle.
Offering High-Definition Peer-Assisted Video On-Demand Systems
Offering High-Definition Peer-Assisted Video On-Demand Systems - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Offering High-Definition Peer-Assisted Video On-Demand Systems write by Le Chang. This book was released on 2013. Offering High-Definition Peer-Assisted Video On-Demand Systems available in PDF, EPUB and Kindle. The past decade has witnessed the fast development of peer-assisted video ondemand (PA-VoD) systems, which have attracted millions of online users. The efforts on improving the quality of video programs have never ceased since the beginning, and nowadays offering high-definition (HD) channels has become a common practice. However, compared with standard-definition (SD) channels, HD channels have to sustain a higher streaming rate to peers, which is a challenging task. In real systems, HD channels often suffer from poor streaming quality, or impose a heavy burden on the servers. This thesis conducts an in-depth study on peer cache and upload bandwidth management at the same time for multi-channel PA-VoD systems, where HD and SD channels coexist with different bandwidth and cache requirements. The objective is to minimize the server bandwidth consumption, and thus the maintenance cost of VoD service providers. The solution is cross-channel allocation (or view-upload decoupling), i.e., making SD channels help HD viewers with the surplus peer-contributed resources. The management of these resources includes bandwidth allocation and caching strategies. We first propose a generic modeling framework to capture the essential characteristics of PA-VoD systems: the demand and supply of bandwidth from peers. Our modeling framework can be customized or extended to model a variety of caching strategies, including FIFO, passive caching, and active caching with different user behaviors. We then apply the modeling framework to two representative scenarios: stationary scenarios, where the channels have fixed popularity; and non-stationary scenarios, in which a new movie is released, and peers enter the channel in a flash-crowd manner. We prove using our models that passive caching is efficient for stationary user behaviors, and derive the optimal caching solutions when the channels in the system demonstrate different popularity evolutions, i.e., with non-stationary behaviors. With the insights gained from our modeling work, we design effective centralized heuristic algorithms and practical distributed strategies for peer cache replacement and upload bandwidth allocation, with a near-optimal utilization of these resources. We propose centralized and distributed cross-channel allocation, and also extend the substreaming technique from live streaming to VoD systems, where it demonstrates its extreme feasibility. Our extensive simulation results verify the efficacy of these heuristic and practical strategies.
Intelligent Multimedia Communication: Techniques and Applications
Intelligent Multimedia Communication: Techniques and Applications - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Intelligent Multimedia Communication: Techniques and Applications write by Chang Wen Chen. This book was released on 2011-07-06. Intelligent Multimedia Communication: Techniques and Applications available in PDF, EPUB and Kindle. Multimedia data are used more and more widely in human being's life, e.g., videoconferencing, visual telephone, IPTV, etc. Nearly most of the applications need multimedia transmission techniques that send multimedia data from one side to another side and keep the properties of efficiency, robustness and security. Here, the efficiency denotes the time cost of transmission operations, the robustness denotes the ability to survive transmission errors or noises, and the security denotes the protection of the transmitted media content. Recently, various intelligent or innovative techniques are invented, which bring vast performance improvements to practical applications. For example, such content transmission techniques as p2p, sensor network and ad hoc network are constructed, which adaptively use the peers’ properties to improve the network’s resources. Multimedia adaptation techniques can adjust the multimedia data rate in order to compliant with the network’s bandwidth. Scalable encryption techniques can generate the data stream that can be correctly decrypted after bit rate conversion. Ubiquitous multimedia services make the user share any kind of content anywhere. The book includes fourteen chapters highlighting current concepts, issues and emerging technologies. Distinguished scholars from many prominent research institutions around the world contribute to the book. The book covers various aspects, including not only some fundamental knowledge and the latest key techniques, but also typical applications and open issues. For example, the covered topics include the present and future video coding standards, stereo and multiview coding techniques, free-viewpoint TV techniques, wireless broadcasting techniques, media streaming techniques, wireless media transmission techniques and systems, and User-Generated Content sharing.
Large-scale Peer-assisted Online Hosting, Distribution and Video Streaming Systems
Large-scale Peer-assisted Online Hosting, Distribution and Video Streaming Systems - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Large-scale Peer-assisted Online Hosting, Distribution and Video Streaming Systems write by Fangming Liu. This book was released on 2011. Large-scale Peer-assisted Online Hosting, Distribution and Video Streaming Systems available in PDF, EPUB and Kindle.
