Towards multi-site collaboration in tele-immersive environments

Wanmin Wu, Zhenyu Yang, Klara Nahrstedt, Gregorij Kurillo, Ruzena Bajcsy

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Tele-immersion is emerging as a new medium that creates 3D photorealistic, immersive, and interactive experience between geographically dispersed users. However, most existing tele-immersive systems can only support two-way collaboration. In this paper we propose a multi-layer framework and a new data dissemination protocol to support multi-site collaboration. The problem context is unique as multiple remote sites participate in an interactive tele-immersive session, where each site has multiple correlated 3D video streams to send (later referred as multi-stream/multi-site environments). The key challenge is to disseminate such large number of 3D live video streams among these sites subject to the bandwidth and latency constraints while satisfying QoS guarantees in visual quality. Among our findings is that the simple randomized algorithm outperforms many other static algorithms in the unique context. Moreover, the streams generated from one site have high semantic correlation, because often cameras at one site are shooting the same scene, only from different angles. We exploit the stream correlation in the multicast protocol to minimize the level of loss.

Original languageEnglish (US)
Title of host publicationProceedings of the Fifteenth ACM International Conference on Multimedia, MM'07
Number of pages4
StatePublished - Dec 1 2007
Event15th ACM International Conference on Multimedia, MM'07 - Augsburg, Bavaria, Germany
Duration: Sep 24 2007Sep 29 2007

Publication series

NameProceedings of the ACM International Multimedia Conference and Exhibition


Other15th ACM International Conference on Multimedia, MM'07
CityAugsburg, Bavaria


  • Multicast
  • Overlay
  • Tele-immersion

ASJC Scopus subject areas

  • Computer Science(all)

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