A Two-Dimensional Audio Scaling Enhancement to an Internet Videoconferencing System *
Peter Nee, Kevin Jeffay, Michele Clark, Gunner Danneels · 1997
: Without widely deployed mechanisms for resource reservation, adaptive, best-effort techniques are the only methods of congestion control available to interactive, real-time applications. Here we discuss media scaling techniques for the audio component of videoconferencing systems and describe an experimental version of the ProShare system that incorporates two of these techniques. We also report the results of experiments using these techniques to adapt to daytime Internet traffic conditions. 1. INTRODUCTION This paper presents the results of experiments comparing two schemes for best-effort, adaptive congestion control for videoconferencing. In particular, these two techniques used two different approaches to the adaptation of the audio component of a videconferencing system. The first of these two schemes used conventional bit-rate scaling to adapt the audio stream. The second scheme employed a two-dimensional scaling scheme to adjust the audio packet-rate as well as the audio bi...