Ngo et al. discuss issues surrounding bandwidth requirements for streamed online zoomable videos that are displayed at higher resolutions using zoom and pan facilities. They assert that the region of interest (ROI) can be determined using previous usage patterns, and that usage patterns can be used to formulate the tiles of a frame that will be clustered and transmitted. With this approach, the authors present an algorithm for adaptive tiling and streaming using an aggressive heuristic to limit motion-based dependency. As the paper indicates, this method allows for a 27 percent reduction in the file size and data rate required.

This paper includes 20 references, though not all of them are cited in the text. The authors tend to introduce new terms and acronyms without adequately defining them, making it necessary for readers to re-read sections. Overall, though, this paper is well constructed and does an excellent job of presenting the results.