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

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Author(s): Lin Chia-Wen | Chang Yao-Jen | Wang Chih-Ming | Chen Yung-Chang | Sun Ming-Ting

Journal: EURASIP Journal on Advances in Signal Processing
ISSN 1687-6172

Volume: 2002;
Issue: 6;
Start page: 756942;
Date: 2002;
Original page

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

ABSTRACT
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.
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