Strategies for Deploying IPTV
Time 10/09/07 01:15PM-02:30PM
Delivering IPTV streams to large numbers of viewers is a bandwidth intensive undertaking. Each kilobit of bandwidth used to transmit video occupies a valuable resource, particularly when there is a long list of other potential services and limits to the capacity of the delivery networks. IPTV providers often spend a great deal of time and money to obtain the highest compression ratios with advanced video encoders.
Curiously, in many of these systems the impact of video contribution quality is largely overlooked, even though the end-of-line quality of the signal delivered to viewers is affected by the quality of both the contribution (collection) and the distribution networks. In particular, many IPTV system head ends are fed with highly compressed HD and SD content from satellite feeds; these signals can fare poorly through the re-compression process required to prepare the video for IPTV distribution at low bit rates. This paper clearly shows how improving the quality of contribution networks through the use of advanced IP video transport technology can deliver better quality video to the viewer at lower bit rates, enabling a variety of other valuable services to be delivered over IPTV distribution networks.
Update and report out on the range of IPTV activities on national, regional, and campus levels/In a metro optical network node, aggregating multiple Gigabit Ethernet traffic into a 10G pipe can be carried out by using multi-port Ethernet switches and a DWDM line cards. The 10G pipe is then sent to a network operating center, in which a router connecting to multiple DWDM line cards is used to sort out the Gigabit Ethernet traffic. In this presentation, we show that by building a thin layer-2 functionality into DWDM line cards, Gigabit Ethernet aggregation into a 10G pipe can be achieved without using any Ethernet switches. Furthermore, the fiber management in the network operating center can be simplified by ten folds due to the fact that the router only needs to handle 10GbE interfaces. As a result, this newly developed DWDM equipment not only simplifies Gigabit Ethernet aggregation, saves capital expenses, but also significantly reduces manual patch-cord connections.
The University of Sao Paulo (USP), as the most important university of Brazil, launched its Experimental IPTV last August intending to improve the academic and scientific information dissemination to not only the university community but also the society. Nowadays, there is a huge amount of video that has been produced and is stored in different USP's units without public access by the community as a whole. The implementation of the USP Experimental IPTV has been done in two main phases. In the first phase, the IPTV programs have been generated by live streaming transmission from real time events such as conferences, art exhibitions, sport competition and video on demand transmission from the current university video archive stored in three distributed servers connected by the USPNet backbone network. Such IPTV programs can be accessed through personal computers. In the second phase, planned to occur in 2008, the IPTV content will be accessed not only through personal computers but also through TV equipment using a set-up box. The video servers network will be extended to all university campi spread in 6 different cities. The final system will offer on demand, live and scheduled video services that can be for public or private distribution. The delivery mechanism is optimized using multicast overlay platform that allows the management of the services and network performance. At the end we expect that the dissemination of this scientific, educational, cultural, and technological content can benefit not only USP's students, professors and employees but also people remotely located from the University. This project has been supported by RNP and CTI/USP.
Speaker Wes Simpson Media Links, Inc.
Speaker Jonathan Tyman Internet2
Speaker Walt Magnussen Texas A&M University
Speaker Regina Melo Silviera LARC - University of Sao Paulo
Speaker Gil da Costa Marques University of Sao Paulo
Speaker Tereza Cristina Carvalho ANSP, LARC - University of Sao Paulo
Speaker Christian Todorov Internet2
Secondary tracks What's Next for the Net