Robust Transmission of 3D Geometry over Lossy Networks Dept. of Electrical Engineering and Computer Science Vanderbilt University Nashville, TN 37235 zhihua.chen@vanderbilt.edu Zhihua Chen Dept. of Electrical Engineering and Computer Science Vanderbilt University Nashville, TN 37235 bobbyb@vuse.vanderbilt.edu Bobby Bodenheimer Dept. of Electrical Engineering and Computer Science Vanderbilt University Nashville, TN 37235 J.Fritz.Barnes@vanderbilt.edu J. Fritz Barnes ABSTRACT This paper describes a robust mechanism for transmitting 3D meshes over the Internet. TCP/IP is an excellent means for reliable transport over the Internet. However, multi-user, real-time graphics applications may nd TCP transmission disadvantageous when reception of a mesh is time-critical. To improve speed one could use an unreliable transmission protocol. Yet typical mesh compression schemes increase the fragility of the mesh to lossy transmission. In this paper, we develop a hybrid method of transmitting meshes over the Internet, built upon progressive mesh [17] technology. The hybrid method transmits important visual detail in a lossless manner, but trades off loss of visually less important detail for transmission speed. Tests of the method in a lossy network environment show that the method improves the transmission time of the mesh with little degradation in quality. 1. INTRODUCTION As the Internet expands, demand is growing for
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