Welcome to Wireless Video Research  of VTVT

Site Outline

Project Overview Reseach Members Publications Useful Links and Documents Info for Team Members Only!

 Project Overview:

The Wireless Video Research Project will implement a portable and robust wireless video system.  This system is targeted for use in situations where a portable, robust system is needed without a need for extremely high video quality.  Thus, the system will be designed with the following goals:
 

• Efficient algorithm of decoding/encoding video to enable usage of wireless communication with acceptable video quality
• Usage of low-power VLSI design techniques that will enable useful portable operation

 
The intended goals for the system will make it suitable for such uses as surveilance, conferencing and mobile patrols where the ability to operate on battery power without a constant base station connection.

The codec (encoder/decoder) for this project will be an adaptation of the ITU's H.263 standard for low bit-rate communication.  The prototype models will run at QCIF resolution (176x144) and are targeted for up to 30 frames per second.  These protoypes will run the codec algorithms on commercial DSP processor chips so that power and processing capabilities of the system can be investigated.  Then the codec will be implemented in ASICs for the inclusion of low-power techniques with the selected DSP algorithm.  Eventually the system will improve the wireless network of the model by including such enhancements as variable transmission power consumption (for varying channel conditions).

Additionally, this project is a collaborative activity that involves research work done at Korea University.  They are working on improving the H.263 algorithms that will be used to implement the compression of video.  The MC (Multimedia Compression) Team's web site at Korea University can be accessed here.

 Research Members:

There are five student researchers, three students from Virginia Tech and two students from Korea University, Korea, are collaborating on this project. Director of the MC team of Korea University is Prof. Myongsoon Park.

 

Name	Email	Level	Research Topic	University
Nate August	nateaugu@vt.edu	M.S.	H.263 Decoder	Virginia Tech
Hyunki Baik	gibson@cslab5.korea.ac.kr	Ph.D.	Codec	Korea Univ.
Hyung-Jin Lee		M.S.	Error Correction	Virginia Tech
Steve Richmond	srichmond@vt.edu	M.S.	H.263 Encoder	Virginia Tech
Sung-Chul Shil	scshin@cslab5.korea.ac.kr	M.S.	Codec	Korea Univ.

 Relevant Publications:

• S.-C. Shin, H. Baik, M.-S. Park and D.S. Ha, "A Center-Biased Hybrid Search (CBHS) Method by Using Plus Search for Block Motion Estimation," International Conference on Circuits and Systems, 2000, Switzerland, May 2000.
• S.-C. Shin, H. Baik, M.-S. Park, and D.S. Ha,  "A Center-Biased Hybrid Search (CBHS) Method for Block Motion Estimation", Proceedings of the Fifth International Conference on Computer Science and Informatics, March 2000.
• H. Baik, D.S. Ha, H.-G. Yook, S.-C. Shin and M.-S. Park, "Selective Application of Burrows-Wheeler Transformation for Enhancement of JPEG Entropy Coding", Proceedings of International Conference on  Information, Communications & Signal Processing, PN.230, December 1999, (4 pages).
• S. Ranpara and D.S. Ha, "A Low Power Viterbi Decoder Design for Wireless Communications Applications," Proceedings of 12th International ASIC/SOC Conference, pp. 377-381, September 1999.
• H.K. Baik, H.G. Yook, S.C. Shin, M.S. Park, and D.S. Ha, "A New Method to Improve the Performance of JPEG Entropy Encoding Using Burrows-Wheeler Transformation," Proceedings of International Symposium on Computer and Information Sciences, pp. 502-509, October 1999.

Note that the above papers are copyrighted by the publishers.

 Useful Links and Documents:

The following links and documents might be helpful to those trying to get a handle on the H.263 compression standard.  Also included are some helpful books on video compression and other references on video.

• The H.263 Standard
• Simple overview of H.263
• Another H.263 introduction page
• Page highlighting H.263 and H.263+ differences
• Paper detailing the differences between H.263 and H.263+ with introductory material (PDF file)
• In-depth introduction to H.263, including bitstream information
• Internation Telecommuncation Union Home Page
• Video Demystified (Book) Home Page: Good material for various video issues (YUV, NTSC std, etc.)
• Univ. British Columbia Image Processing Team: Has Telenor public domain H.263 software

Project Overview  Research Members  Publications Useful Links and Documents

VTVT Home Page

Dr. Ha's Home Page

VISC Home Page

Comments to: Steve Richmond (srichmond@vt.edu )
Last Updated: July 31, 2000
http://www.ee.vt.edu/~ha/research/video