The Research Of Reliability Streaming Media On Multicast Environment

Henan IPTV startup is based on rural party members and cadres in modern distance education as an opportunity, it's the application pattern of VCOM's IPTV technology, also is a classic case of exploration. Henan Netcom as a total integrator, through the company's successful operation, culminating in the IP multi-service model-Henan mode. Use only three month, we finished nine cities,54 counties,11,000 administrative villages of platform and terminal construction tasks.With the company's development and increases size of user led to obvious bottleneck of Live Streaming Media Service. The traditional Live Streaming Services providers point to point services, but this approach consumes a large amount of network bandwidth and server resources.Multicast technology is an ideal state in the best way to solve this problem, but it can not guarantee data integrity. Network "jitter" will generate packet loss, resulting in a mosaic screen, invalid image, sound loss, noise, and event lead to crash player and set-top-box and other serious conditions.In order to solve the multicast problem of incomplete data transmission, Company research team conoducted extensive research and experimentation. Author as the project manager involved throughout the development.In the paper, the authors first introduced the concept of multicast technology, and the RTP protocol and QOS quality of service concept, leads to the design of reliable multicast system encountered technical difficulties, and gives the corresponding solution to the problem, and provide overall solution. Also shows the main functional part of the code, the system test process and test results, the final summary of the system, indicating that the use of the system.In practice and research process, the author's main work is needs analysis, system design, development tracking, unit testing process tracking system to track the testing process until the project end item.This paper is divided into seven chapters.Chapter 1:Introduce the research background, the authors work and obtains the research achievementsChapter 2:Research related technology used in the processChapter 3:Reliable multicast system introducationChapter 4:Reliable multicast system design and basic principlesChapter 5:Reliable multicast system main modules introduce and showcase some of the codeChapter 6:Reliable multicast system testing and validationChapter 7:Summary...