OSTN Distribution
OSTN utilizes a non-traditional method of content and signal distribution, the Internet2 high speed academic network. Whereas a traditional television network sends its programming to affiliates via satellite feeds, OSTN uses a high bandwidth connection via the Internet2 network to directly feed affiliates via standard LAN/WAN connections. Rather than require student television affiliates to purchase and maintain costly microwave, satellite, or dedicated fibre-optic transmission equipment, OSTN allows student stations and member institutions to receive the OSTN channel via existing high-speed IP-based network equipment.
The OSTN stream was initially a 1.6 megabit Windows Media stream, available live 24/7 over Internet2 to all member institutions. Windows Media encoding permitted a true NTSC quality stream of video to be transmitted at a relatively low bitrate. However, the WMV version of OSTN suffered from reliability issues, and was replaced in the fall of 2007 by a highly robust, scalable, and enterprise-grade IPTV distribution system. The current iteration of OSTN is a 2.0-4.0 MPEG-2 program stream, available via the Internet2 network. OSTN's new distribution system will allow the network to eventually offer itself as a 1.5-2.0 megabit H.264 program stream, and will be scalable to future implementations of an OSTN HD offering.
OSTN is delivered to consumers via two methods: over IP to the desktop computer via a web port and via traditional "legacy" CATV systems. When injected onto a legacy CATV system or onto a student television channel, OSTN utilizes a set top box converter device outputting analog NTSC or component video, which is then either mixed with local student TV programming (a network-affiliate model, such as Buckeye TV) or directly inserted onto the CATV line-up as its own separate channel.
Read more about this topic: Open Student Television Network
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