change carriers and information service providers upon a bona fide request. 2. Carpenter, Brian. Internet Architecture Board (IAB) Architectural Principles of the Internet. Internet Engineering Task Force (IETF) Request For Comments (RFC), 1968. hhftp://isi.edu/in-notes/rfc1958.xt 3. http://www.lsi.usp.br/rbianchi/clarke/ACC.ETRelaysFull.html Note: This is only one of many sites resulting from an Internet search: "Arthur C. Clark" + "Wireless World 1945." Typically, the result is a scanned copy of the original article from the publication 4. Clarke, Arthur C. Exploration of Space. New York: Pocket Books, 1979. This page intentionally left blank CONTENT TRANSPORT NETWORK DEFINED Before going into the details of content transport networks, it is important to not lose sight of what we are trying to accomplish in terms of the end-to-end service required to support the program content food chain cycle. Figure 3-1 is representative of a framework for the current and foreseeable future. This framework is intended to apply to digital radio and other forms of content carried by the Internet and listened to or displayed on desktop machines and handheld devices with wired or wireless connectivity. The notion behind this sketch is to add details about how the content moves within and between production and trans- mission facilities and is finally delivered to the user or viewer. This chapter is a high-level description of functions, capabilities, and limitations of networks capable of carrying program content. It in- cludes a high-level architecture concept and shows how standard- ized communications equipment, facilities, and services can be used to fashion content transport networks. Practical IP and Telecom for Broadcast Engineering and Operations Copyright © 2004 by Fred Huffman. All rights of reproduction in any form reserved. Content Creation Content Delivery Archive Content Distribution Program Production Data/Video/Audio Satellite Television Enterprise Screen Asset Management ATSC-DTV 19.4Mbs DTV Transmission SD, HD,