Cheng Wei

School of Computing, National University of Singapore

Multimedia Information Lab 3, AS6 05-22

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Profile

Ph.D. student in School of Computing, National Univerisity of Singaore from July 2005. He obtained Bachelor degree from Tongji Univerisity, Shanghai, China and Master Degree from Fudan University, Shanghai, China. His research area is multimedia system, espacially in 3D streaming, and his supervisor is Ooi Wei Tsang.

Publication

• Wei Cheng, Wei Tsang Ooi, Sebastien Mondet, Romulus Grigoras, Geraldine Morin;
  Modeling Progressive Mesh Streaming: Does Data Dependency Matter? ;
  accepted by ACM Transactions on Multimedia Computing, Communications and Applications (ACM TOMCCAP).
  
• Wei Cheng, Dan Liu, Wei Tsang Ooi;
  Peer-Assisted View-Dependent Progressive Mesh Streaming;
  in proceeding of ACM Multimedia 2009, Beijing, China.
  [PDF], [Slides]
  
• Ransi De Silva, Wei Cheng, Dan Liu, Wei Tsang Ooi, Shengdong Zhao;
  Towards Characterizing User Interaction with Progressively Transmitted 3D Meshes;(short paper)
  in proceeding of ACM Multimedia 2009, Beijing, China.
  
• Sebastien Mondet, Wei Cheng, Geraldine Morin, Romulus Grigoras, Frederic Boudon, Wei Tsang Ooi;
  Compact and Progressive Plant Models for Streaming in Networked Virtual Environments ;
  ACM Transactions on Multimedia Computing, Communications and Applications (ACM TOMCCAP). Vol. 5, No. 3, 2009 p21:1-22
  
• Hang Yu, Ee-Chien Chang, Wei Tsang Ooi, Mun Choon Chan, and Wei Cheng;
  Integrated optimization of video server resource and streaming quality over best-effort network;
  IEEE Transactions on Circuits and Systems for Video Technology(IEEE TCSVT). Vol. 19, No. 3, 2009 p374-385
  
• Wei Cheng;
  Streaming of 3D Progressive Meshes (Doctoral Symposium Abstract);
  in Proceeding of ACM Multimedia 2008, Vancouver, BC, Canada.
  
• Sebastien Mondet, Wei Cheng, Geraldine Morin, Romulus Grigoras, Frederic Boudon, and Wei Tsang Ooi;
  Streaming of Plants in Distributed Virtual Environments;
  in Proceeding of ACM Multimedia 2008, Vancouver, BC, Canada. (Best Paper)
  
• Wei Cheng, Wei Tsang Ooi;
  ''Receiver-Driven View-Dependent Streaming of Progressive Mesh'';
  in proceeding of NOSSDAV 2008, Braunschweig, Germany, 2008.
  [Slides]
  
• Wei Cheng, Wei Tsang Ooi, Sebastien Mondet, Romulus Grigoras, and Geraldine Morin;
  ''An Analytical Model for Progressive Mesh Streaming'';
  in proceeding of ACM Multimedia 2007, Augsburg, Germany, 2007.
  [Slides].
  

Source Code

The source code of our receiver-driven view-dependent streaming system is available here.

Research

Our research lies in the area of 3D streaming, including the encoding, transmitting and decoding of the 3D data.

More and more 3D objects are digitized and transmitted over the Internet now. The transmission of 3D objects is used in many applications, such as digital museums and online games, but the limited bandwidth remains the bottleneck.

Progressive streaming of 3D objects can reduce the waiting time and provide a coarse preview. Although streaming of video and audio has been researched in depth, streaming of 3D objects remains a new and challenging area.

We try to begin the research about the integration of coding, packetization and transmission to find a comprehensive scheme of 3D streaming. We have already found the effect of dependency with an analytical model. Moreover, we have proposed a receive-driven protocol to support the view-dependent streaming of progressive meshes. Our protocol can significantly increase the scalability of the server. Currently, we are studing on how to apply this protocol on a P2P system to support large number of users simultanously view a progressive mesh without need to increase the number of servers. More Details in the project page

Teaching

Module Code	Module Name	Semester/Year	As	Feedback
CS2105	Introduction to Computer Networks	1, 2007/08	Tutor	link
CS2105	Introduction to Computer Networks	1, 2008/09	Tutor	link
CS5229	Advanced Computer Networks	1, 2009/10	TA (grading)

Others

Courses taken

Module Code	Module Name	Semester/Year Taken	Lecturer
CS5240	Theory and Practice of Multimedia	1,2005/06	Dr. Terence SIM
CS5248	Systems Support for Continuous Media	1,2005/06	A/P. Ooi Wei Tsang
CS5272	Embedded Software Design	1, 2005/06	A/P. Mitra, Tulika
CS5229	Advanced Computer Networks	2, 2005/06	Dr. Chan Mun Choon
CS5237	Computational Geometry and Applications	1, 2006/07	Dr. Cheng Holun, Alan
CS6281	The Art of Research	1, 2006/07	A/P. Hsu, David
CS5234	Combinational and Graph Algorithms	2,2006/07	A/P. Leong Hon Wai
CS6282	Analytic Modeling of System Performance	2,2006/07	Prof. Tay Yong Chiang

Contact

Email: chengwe2 AT comp DOT nus DOT edu DOT sg

Lab: Multimedia System Lab 3, AS6 05-22.