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Proceedings Paper

Experiments in best-effort multimedia networking for a distributed virtual environment
Author(s): Thomas C. Hudson; Michele Clark Weigle; Kevin Jeffay; Russell M. Taylor
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Paper Abstract

Until there is greater consensus on proposals for realizing better-than-best-effort services on the Internet, developers of multimedia and distributed virtual environment applications must rely on best-effort media adaptations to ameliorate the effects of network congestion. We present the results of a study on the use of adaptations originally developed for audio and video applications for the data-flows generated by the UNC nanoManipulator. The nanoManipulator is a virtual environment interface to a scanned-probe microscope that has been used by scientists as a tool for basic research in the material and biological sciences. We are building a distributed version of the system for operation over the Internet and are investigating media adaptations for realizing application performance requirements. The results of early experiments with audio and video-centric media adaptations applied to the flows generated by a microscope and a haptic force feedback device are promising. A simple forward error correction scheme provides good recovery from packet loss and an elastic display-queue management scheme limits the impact of delay- jitter and results in more continuous playout of media samples. These preliminary results provide evidence that a sophisticated virtual environment interface can operate over modest distances over the Internet to control a remote microscope in real-time.

Paper Details

Date Published: 22 December 2000
PDF: 11 pages
Proc. SPIE 4312, Multimedia Computing and Networking 2001, (22 December 2000); doi: 10.1117/12.410916
Show Author Affiliations
Thomas C. Hudson, Univ. of North Carolina/Chapel Hill (United States)
Michele Clark Weigle, Univ. of North Carolina/Chapel Hill (United States)
Kevin Jeffay, Univ. of North Carolina/Chapel Hill (United States)
Russell M. Taylor, Univ. of North Carolina/Chapel Hill (United States)


Published in SPIE Proceedings Vol. 4312:
Multimedia Computing and Networking 2001
Wu-chi Feng; Martin G. Kienzle, Editor(s)

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