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Research and Implement on the Streaming Mediaadaptive Transmission Strategy Based on HTTP Streaming

Author: WangXin
Tutor: LiuFeng
School: Nanjing University of Posts and Telecommunications
Course: Signal and Information Processing
Keywords: Triple play Streaming HTTP fluidized Adaptive algorithm
CLC: TN919.8
Type: Master's thesis
Year: 2012
Downloads: 86
Quote: 0
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Abstract


TCP / IP technology, digital technology, optical communication technology and software technology, the rapid development of the network convergence has become an inevitable trend, the industry put forward the concept of the \\As a triple play in one of the core technology of the video business applications, streaming media technology based on HTTP streaming has attracted more and more attention. The fluidization of HTTP-based adaptive streaming transmission key technologies in-depth study, specific work is as follows: First, the article briefly describes the knowledge of streaming media technology, and application of streaming media in the triple play video business The main characteristics of the transmission, summed up the HTTP-based adaptive streaming flow transfer key technologies. Compared to traditional streaming media technology, transmission technology for adaptive HTTP streaming streaming media source multi-rate adaptive algorithm has been the differentiated technical requirements and increase such as streaming media file sliced The new technical contents. Secondly, in the HTTP-based streaming flow adaptive based on the transfer of key technology research, combined with a three-screen integration technology research project requirements, design based HTTP streaming and supports a variety of streaming media file container adaptive transmission format presentation systems. The server side of the system was designed and implemented three functional modules, the number of such intermediate forms of media-based container format conversion method and server-side driven HTTP streaming adaptive algorithm based on HTTP streaming streaming application processing technology. The system's client file container format for streaming using different player strategies. Which, through the further development of the Silverlight platform, rich media ISMV container format file playback interface and HTTP streaming client-driven adaptive algorithm; choose Jw Player Player support streaming FLV container format file play. The test results show that the success of the system to achieve a variety of container format streaming video stabilization, continuous, smooth playback, and adaptive stream switching can be effective under different network conditions. Finally, the article based on the adaptive algorithm in the field of HTTP streaming research, on the basis of analysis of the RA algorithm proposed an improvement of the RA algorithm. This algorithm combines the the mainstream Microsoft Smooth Streaming adaptive strategy, drawing on the advantages of the two algorithms SFT-RA and SD-RA, an accurate estimate of the current available bandwidth. The simulation results show that, compared with the two algorithms SFT-RA and SD-RA, the RA algorithm to better adapt to the current network bandwidth, can enhance the user experience.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Image communication, multimedia communication
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