Evolutionary architectures and techniques for video distribution on fiber

A number of proposed and/or demonstrated approaches to video distribution on fiber are highlighted. Each of the architectures described embodies a different combination of delivery mode, degree of fiber utilization, transmission format, and multiplexing technique. The various approaches typically rely on different classes of technologies and can result in different service capabilities. Since available technologies and service demands generally evolve with time, the architectures are presented in an evolutionary manner, beginning with those that appear technologically and economically feasible in the early 1990s, and ending with more sophisticated techniques targeted for the late 1990s and beyond. For each time frame, key technology and system issues are stressed, as well as limits and driving forces that may trigger evolution to later, more advanced architectures. The key design considerations that are common to all of these approaches and the factors that will ultimately govern the pace of evolution from one class of architectures to another are summarized.<>