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Below is a general description of the research projects on-going at DISCOVER Lab. Some of them are projects we are planning for the coming academic
year. As the year progresses, we may add more details regarding each topic. |
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Research and development of our video conferencing algorithm, CU30, has been the central focus of DISCOVER Lab. Traditionally, development of our video conferencing software has been on the MS Windows platform, under the name of CU30. In 1999, initiated by Aron Rosenberg, Andy Dodd and Ben Luk, the CU30 code was successfully ported to the Linux platform. Then with the creation of a project on Sourceforge.net (no longer maintained), our CU30 project also became a part of the open source software community. Being one of the very few video conferencing applications that support the commonly used USB netcams (or webcams), CU30 quickly became quite popular among Linux users. |
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Currently, we have on-going projects that enhance CU30 in these areas:
Open loop rate Control
Enhancements to audio support and compression
Enhancements to the quantizer
Browser plugin support for qVIX
Feedback in data stream and two-way control messaging
Encryption in the data stream
High frame rate qVIX |
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Initiated by
Aron Rosenberg, DISCOVER Lab is very happy to receive Applied Data Systems´ support and donation for a joint development of a Linux-based 802.11b enabled handheld
device that runs CU30. ADS is a embedded computer system manufacturer in Maryland that specializes in ARM-based single board computers (SBC). As part of the joint program, ADS has loaned us one Graphics Master, a
development system on their SBC line, and will be donating us two Bitsy device, smaller battery-opearated SBC clients. |
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Our research was greatly benefited with Symbol Technologies´ donation of WLAN equipment, as their equipment gives us a testbed for our software and also allows us to verify and compare results generated through simulations with actual experiments. Back to top
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Our speech recognition group was established in 1998. Since then, the group has been involved in various interesting areas, with contribution from
Ph.D. student research, M.Eng. projects and undergraduate projects. The two major projects are: (1) Speaker verification: Speaker verification is one of the techniques in biometrics. As "voiceprint", speech
can be used to verify a person's claimed identity by the use of a machine automatically. Speaker verification can be classified into text-independent and text-dependent verification. Both systems have been developed in our group
based on Hidden Markov Model (HMM) and Gaussian Mixture Model (GMM). This technique can be used in many access-control applications, such as bank security, telephone transaction, and computer login, etc. (2) Keyword spotting:
Keyword spotting is trying to detect the words that we are interested in from spontaneous conversational speech. It is much more computationally efficient than a large vocabulary speech recognition system. The corresponding
response can be made based on the decision. A demo system was developed for this technique. Keyword spotting can be used for automatic information retrieval from large amount of recorded audio data. Our work also includes
some other projects, such as voice conversion and speech synthesis. Some joint work has been done with the researchers in IBM T.J. Watson research center. Multiple papers have been published in ICASSP and ICSLP during recent years.
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BREW, or Binary Runtime Environment for Wireless, is a development platform for 3G cellular networks released by Qualcomm Inc. With BREW, developers can create
applications for any Qualcomm CDMA2000 handsets without requring the developer to have the chip system´s source code or relationship for a manufacturer. This means once an application is
developed, there is no need to redevelop for or port to a specific platform. We are currently working on such an applet call BREW Video which is a video conferencing application designed for 3G mobile networks.
Our bandwidth efficient video encoding and compression algorithms should be very advantageous for mobile phone operations. |
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©Copyright 2001-2003 DISCOVER Lab |
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