Paper Review:
Quality Adaptation for Congestion Control Video Playback over the Internet

Reviewer: Robert Dugas


This paper addresses the problem of adapting streaming media protocols to become TCP friendly while preserving as much quality as possible.


The primary contribution is an algorithm for smoothly adjusting the video quality in order to compensate for congestion control-based rate changes.

Main Ideas


Although the idea of heirarchically storing media for adjustable transmission is not novel, this paper represents a comprehensive guide to effectively deploying such a mechanism. The buffering strategies and stability enhancements further extend the idea.
This paper is largely theoretical and often it is unclear where how the authors arrived at certain equations or heuristics. Towards the end, some experimental results are presented but the focus of the paper is primarily on explaining the transmission scheme.
The primary limitation of this scheme is that it is unclear why users would opt for clients that provided poorer overall quality media. Some effort should be made to explain how this technology could viably be deployed in today's streaming media market. Lessons:
This paper demonstrates that relatively stable streaming media can be compatible with current internet congestion control protocols.