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  • Research Article
  • Open Access

A Standard-Compliant Virtual Meeting System with Active Video Object Tracking

  • 1Email author,
  • 2,
  • 2,
  • 2 and
  • 3
EURASIP Journal on Advances in Signal Processing20022002:756942

  • Received: 2 October 2001
  • Published:


This paper presents an H.323 standard compliant virtual video conferencing system. The proposed system not only serves as a multipoint control unit (MCU) for multipoint connection but also provides a gateway function between the H.323 LAN (local-area network) and the H.324 WAN (wide-area network) users. The proposed virtual video conferencing system provides user-friendly object compositing and manipulation features including 2D video object scaling, repositioning, rotation, and dynamic bit-allocation in a 3D virtual environment. A reliable, and accurate scheme based on background image mosaics is proposed for real-time extracting and tracking foreground video objects from the video captured with an active camera. Chroma-key insertion is used to facilitate video objects extraction and manipulation. We have implemented a prototype of the virtual conference system with an integrated graphical user interface to demonstrate the feasibility of the proposed methods.


  • video conference
  • virtual meeting
  • immersive video conference
  • networked multimedia
  • multipoint control unit
  • MCU
  • multimedia over IP
  • object segmentation
  • object tracking

Authors’ Affiliations

Department of Computer Science and Information Engineering, National Chung Cheng University, Chiayi, 621, Taiwan
Department of Electrical Engineering, National Tsing Hua University, Hsinchu, 300, Taiwan
Information Processing Laboratory, University of Washington, Seattle, WA 98195, USA


© Lin et al. 2002