THE PROJECTS

Current Projects

• Tcl-DP
  A distributed programming extension to Tcl/Tk. Adds TCP and IP connection management, RPC and distributed object support to Tcl/Tk.

• TEKI
  A generic installer tool for TCL/TK applications.

• Dali Virtual Machine
  A set of low-level high performance instructions that operations on image, video and audio.

• Rivl
  An extension to Tcl/Tk that treats images, video and audio as first class data types.

• Compressed Domain Transcoder
  Research into real-time MPEG to JPEG transcoding. A compressed-domain transcoder is publicly available.

• Lecture Browser
  This is a system to digitize and store lectures given in Philips 101. The lecture videos will be made available through a web site so that they can be replayed at the viewer's convenience.

• Video on the Net
  An experiment to gather as much data as possible on videos on the world wide web and draw some conclusions from the results.

• Video Access Analysis
  An analysis of how users access videos on the world wide web.

• MiddleMan: A Video Caching Web Proxy Server
  How caching of video can alleviate latency and bandwidth problems.

Previous Projects

• TOCX
  A OCX Extension to Tcl/tk.

• Canvas3D
  An extension to Tcl/Tk for interactive, platform-independent development of high-performance 3D graphics in multimedia and VR applications.

• Jacl
  Jacl, pronunced "Jackal", is a Tcl interpreter written in Java. You can use it for Java the same way Tcl is used for C -- a scripting language to glue together modules written in a low level language.

• Video Morphing
  We present a new technique for creating the visual effect of morphing two video sequences. Our approach relies on still image metamorphosis techniques and extends them to video by performing motion tracking on the objects. The additional information provided by sequences is used to limit the scope of the conventional metamorphosis algorithm, allowing more localized morphing effects.We compare our approach to conventional motion image morphing techniques in terms of the quality of the output image and the reduction in human input required to achieve it.

• ThinStreams
  Multicast is a common method for distributing audio and video over the Internet. Since receivers are heterogeneous in processing capability, network bandwidth, and requirements for video quality, a single multicast stream is usually insufficient. A common strategy is to use layered video coding with multiple multicast groups. In this scheme, a receiver adjusts its video quality by selecting the number of multicast groups, and thereby video layers, it receives. Implementing this scheme requires the receivers to decide when to join a new group or leave a subscribed group.

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