3D Mesh Streaming

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3D triangular mesh is becoming an increasingly important data type for networked applications such as digital museums, online games, and virtual worlds. A high quality 3D mesh can consists of billions of polygons, giving a total data size in the order of gigabytes, even after lossless compression. Disseminating such 3D meshes over a resource-constraint network for on-demand viewing and rendering presents many technical challenges. We are investigating how to efficiently and effectively support streaming of large 3D meshes to large number of clients over the Internet. This project is partially supported by MOE ARF Grant 232-000-306-112. (September 2007 - September 2009).

People: Wei Cheng, Wei Tsang Ooi.

Interactive Digital Violin Tutor

Interactive Digital Violin Tutor (iDVT) enables students to have reflective practice when human teachers are not available. It combines violin audio transcription with visualization. Our transcription method is designed for violin audio recorded in home environments. The visualization is designed to be useful to people with different level of music knowledge. The different visualization modalities-video, 2D fingerboard animation, 3D avatar animation-help learners to practice and learn more effectively. The entire system has been implemented with off-the-shelf hardware and shown to be practical in home environments. This project is supported by MOE ARF Grant R-252-000-187-112 and R-252-000-267-112.

People: Binjun Zhang, Jia Zhu, Ye Wang, Wee Kheng Leow, David Hsu

Wireless Ad Hoc Media Streaming

With the widespread availability of handheld devices that are both media-capable and wirelessly networked, streaming audio or video content between such units is feasible. Many recent mobile devices can operate via wireless 802.11 networks, which provide broadband-level bandwidth (usually free of charge) and a communication range of hundreds of meters. This allows a user to move freely when she is streaming multimedia content from others within her communication radius. One challenge in streaming multimedia content among mobile ad hoc peers is to deliver the content over a wireless link whose quality is constantly changing. Our research in this area focuses on link availability prediction to improve the quality of peer streaming.

People: Roger Zimmermann