ViVoNets Lab

Welcome to the Video and Voice over Networks (ViVoNets) Group at UCSB

People

Faculty
Jerry D. Gibson Chair of Electrical & Computer Engineering, Professor of Electrical & Computer Engineering and Media Arts & Technology, UCSB

L-R: Prof. Jerry D. Gibson, Megha Manohara, Javier Villegas, Stephen Mangiat

L-R: Archana Gopalan, Pravin Ramadas, Marco Zoffoli, Malavika Bhaskaranand, Yiting Liao

Master's Students
Pravin Ramadas

Doctoral Students
Malavika Bhaskaranand :: Yiting Liao :: Javier Villegas :: Stephen Mangiat

Visitors
Marco Zoffoli (University of Bologna, Italy)

Recent Graduates
Megha Manohara, Master, Thesis title: Power Control and Error Correction Scheme for Reliable Transmission of Uncompressed HD Video over Wireless.
Archana Gopalan, Master, Winter 2009.
Jagadeesh Balam, Ph. D., December 2007, Dissertation title: Multiple Descriptions Coding for Voice Communications over Mobile Ad Hoc Networks.
Sayantan Choudhury, Ph. D., December 2007, Dissertation title: Link Adaptation and Cross Layer Design for Multimedia Communications.
Jing Hu, Ph. D., December 2007, Dissertation title: Fundamental Limits in Video Compression and Video Communications.
Niranjan Shetty, Ph. D., December 2007, Dissertation title: Tandeming in Multi-hop Voice Communications.

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Research

Research in the ViVoNets Lab is concerned with all aspects of the transmission of voice, audio, still images, and video over mulithop, wireless, heterogeneous networks, with a particular emphasis on handheld devices and highly mobile broadband networks. On-going research in the Lab includes the design of lossy compression methods for narrowband and wideband voice, multichannel audio, and high dynamic range and 3-D video, the development of new functionalities for existing compression methods, joint source/channel coding, packet loss concealment and robust encoder design, PHY/MAC/Application cross layer designs, adaptive modulation and coding, source and channel diversity methods, and end-to-end performance optimization for the human user. We are also interested in preprocessing and postprocessing methods, such as video stabilization, scene relighting, and color equalization, particularly for multiple cameras. The overarching goals of the work are to advance the understanding of fundamental limits on system performance and to contribute to the state-of-the-art in digital signal processing, perceptually based performance measures, source coding, channel coding, and modulation.

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Seminars

Recent

May 28, 2009, 12:45 pm: Distributions of the 3D DCT coefficients of video by Malavika Bhaskaranand at Room 4164, Harold Frank Hall.

May 19, 2009, 11 am: Threads, Strokes, and Other Numbers: Engineering Painting Image Analysis by Prof. Rick Johnson from the Department of Electrical and Computer Engineering, Cornell University at Room 1605, Elings Hall.

April 27, 2009, 11 am: Error Correcting Codes for Lossy Compression by Ankit Gupta from the Department of Electrical Engineering, Princeton University at Room 4164, Harold Frank Hall.

March 7, 2008, 11 am: Species Signatures and their Application by Prof. Khalid Sayood from the Department of Electrical Engineering, University of Nebraska-Lincoln at Room 4164, Harold Frank Hall.

Feb 8, 2008, 2 pm: Upcoming Video Coding Standards by Dr. Madhukar Budagavi from Texas Instruments, at Buchanan 1940. [abstract]

Jan 22, 2008, 2 pm: IPTV Challenges and Opportunities by Dov Zimring from Strategic Technology and Solutions, Occam Networks at 1802 Psychology Building.

May 25, 2007, 2 pm: An Overview of Digital Cinema by Prof. Michael W. Marcellin from the Department of Electrical and Computer Engineering, University of Arizona, Tucson, at Room 4164, Harold Frank Hall.

March 12, 2007, 11 am: Off-line foveated video: Effects on compression and perception by Marcus Nyström from the Department of Information Technology, Lund University, and currently a visiting PhD student at ViVoNets, at Building 406 - Rm 216. [abstract] [slides]

March 02, 2007, 2 pm: Experiential Signal Processing (ESP) and Experiential Telecommunications (ET): Sense Everything, Transmit Everything You Sense, Present Everything You Receive by Prof. Jerry D. Gibson at Buchanan 1930. [abstract] [slides]

Jan 22, 2007, 10am: Digital Audio Broadcasting and 4G Cellular Convergence by Carl-Erik W. Sundberg from SundComm at Room 4164, Harold Frank Hall. [abstract]

Dec 7, 2006, 2:15pm : Introduction to Mobile WiMAX Radio Access Technology: PHY and MAC Architecture by Sassan Ahmadi from Intel Corporation at Room 4164, Harold Frank Hall. [abstract] [slides]

Nov 9, 2006, 3pm: The Brave New Media: A Plenoptic Journey by Dan Lelescu from Micron Technology at Room 4164, Harold Frank Hall. [abstract] [slides]

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Publications

2009 |2008 | 2007 | 2006 | 2005 | 2004 | 2003

2009

P. Ramadas and J. D. Gibson, Multimode Tree Coding of Wideband Speech with a G.722 Code Generator, submitted to IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP'10), 2010

K. Malasani, P. Ramadas and J. D. Gibson, Phonetic Mode selection and Tree Coding of Wideband Speech with an Adaptive RLS Lattice Code Generator, submitted to IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP'10), 2010

J. D. Gibson, J. Hu and P. Ramadas, New Rate Distortion Bounds for Speech Coding based on Composite Source Models, submitted to IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP'10), 2010

P. Ramadas and J. D. Gibson, Phonetically Switched Tree coding of speech with a G.727 code Generator, accepted by the 43rd Annual Asilomar Conference on Signals, Systems, and Computers. [pdf]

J. Hu and J. D. Gibson, A Practical Rate Distortion Bound For Inter-Frame Video Coding, accepted by the 43rd Annual Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, November 1-4, 2009.

J. Hu, S. Choudhury and J. D. Gibson, PSNR_{r,f}-MOS_r: An Easy-To-Compute Multiuser Perceptual Video Quality Measure, QoMEX 2009, First International Workshop on Quality of Multimedia Experience.[pdf]

S. Mangiat and J. D. Gibson, Automatic Scene Relighting for Video Conferencing, accepted by IEEE ICIP 2009.

J. Hu and J. D. Gibson, New Rate Distortion Bounds for Natural Videos Based on a Texture Dependent Correlation Model, IEEE Transactions on Circuits and Systems for Video Technology, Volume 19, Issue 8, Aug. 2009 Page(s):1081 - 1094. [pdf]

M. Manohara, R. Mudumbai, J. D. Gibson and U. Madhow, Error Correction Scheme for Uncompressed HD Video over Wireless, International Conference on Multimedia & Expo (ICME), June 2009. [pdf]

Y. Liao and J. D. Gibson, Rate-distortion Based Mode Selection for Video Coding over Wireless Networks with Burst Losses, Packet Video Workshop, Seattle, WA, May 2009. [pdf]

M. Bhaskaranand and J. D. Gibson, Distributions of 3D DCT Coefficients for Video, IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP'09), Taipei, April 2009 [pdf]

Y. Liao and J. D. Gibson, Enhanced Error Resilience of Video Communications for Burst Losses Using an Extended ROPE Algorithm, IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP'09), Taipei, April 2009 [pdf]

J. Hu and J. D. Gibson, Rate distortion bounds for blocking and intra-frame prediction in videos, Information Theory and Applications Workshop, University of California, San Diego, La Jolla, CA, Feb. 2009. [pdf]

2008

J. Hu, S. Choudhury and J. D. Gibson, Video Capacity of WLANs with a Multiuser Perceptual Quality Constraint, IEEE Trans. on Multimedia, vol. 10, no. 8, pp. 1465-1478, 2008. [pdf]

M. Zoffoli, J. D. Gibson, and M. Chiani, On Strategies for Source Information Transmission over MIMO Systems, Global Telecommunications Conference 2008 (GLOBECOM '08), November 30 - December 4, 2008. [pdf]

Y. Liao and J. D. Gibson, Refined Error Concealment for Multiple State Video Coding over Ad Hoc Networks, the 42st Annual Asilomar Conference on Signals, Systems, and Computers, October 26-29, 2008. [pdf]

P. Ramadas and J. D. Gibson, A Phonetically Switched ADPCM speech coder, the 42st Annual Asilomar Conference on Signals, Systems, and Computers, October 26-29, 2008. [pdf]

J. Hu and J. D. Gibson, New rate distortion bounds for natural videos based on a texture dependent correlation model in the spatial-temporal domain, Forty-Sixth Annual Allerton Conference on Communication, Control, and Computing, Sep. 2008. [pdf]

J. Balam and J. D. Gibson, A Transcoding-Free Multiple Description Coder for Voice over Mobile Ad-hoc Networks, IEEE Wireless Communications and Networking Conference (WCNC), March-April 2008. [pdf]

N. Shetty, J. D. Gibson., Perceptually weighted distortion measures and the tandem connection of speech codecs, IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), April 2008. [pdf]

M. Zoffoli, J. D. Gibson, and M. Chiani, Source coding diversity and multiplexing strategies for a 2x2 MIMO system, Information Theory and Applications Workshop, University of California, San Diego, La Jolla, CA, Jan. 27 - Feb. 1, 2008. [pdf]

S. Choudhury and J. D. Gibson, Throughput Optimization for Wireless LANs in the Presence of Packet Error Rate Constraints, IEEE Communication Letters, January 2008. [pdf]

2007

J. Balam and J. D. Gibson, Two-Hop Two-Path Voice Communications over a Mobile Ad-hoc Network, IEEE Global Commmunications Conference, November 26-30, 2007. [pdf]

S. Choudhury and J. D. Gibson, Information transmission over Fading Channels, IEEE Global Communications Conference, November 26-30, 2007. [pdf]

M. Nyström, J. D. Gibson, and J. B. Anderson, Multiple Description Image Coding Using Regions of Interest, the 41st Annual Asilomar Conference on Signals, Systems, and Computers, November 4-7, 2007. [pdf]

N. Shetty and J. D. Gibson, Perceptual Pre-weighting and Post-inverse weighting for Speech Coding, the 41st Annual Asilomar Conference on Signals, Systems, and Computers, November 4-7, 2007. [pdf]

J. Hu, S. Choudhury and J. D. Gibson, Perceptual quality constrained video user capacity of 802.11a WLANs, the International Wireless Communications and Mobile Computing Conference, August 12-16, 2007.

J. Balam and J. D. Gibson, Multiple Descriptions and Path Diversity for Voice Communications over Mobile Ad-hoc Networks, IEEE Transactions on Multimedia. [pdf]

J. Hu, S. Choudhury and J. D. Gibson, H.264 Video over 802.11a WLANs with Multipath Fading: Parameter Interplay and Delivered Quality, International Conference on Multimedia & Expo (ICME), July 2007.

N. Shetty and J. D. Gibson, Packet Loss Concealment for G.722 using Side Information with application to Voice over WLANs, Journal of Multimedia, Vol. 2, No. 3, pp 66-76, June 2007. [pdf]

J. Hu and J. D. Gibson, New rate distortion bounds for natural videos based on a texture dependent correlation model, IEEE International Symposium on Information Theory, Jun 2007.

S. Choudhury and J. D. Gibson, Payload Length and Rate Adaptation for Multimedia Communications in Wireless LANs, IEEE Journal on Selected Areas in Communications (special issue on Cross-Layer Optimized Wireless Multimedia Communications), May 2007. [pdf]

S. Choudhury and J. D. Gibson, Ergodic capacity, outage capacity, and information transmission over Rayleigh fading channels, Information Theory and Applications Workshop, University of California, San Diego, La Jolla, CA, January 29-February 2, 2007. [pdf]

2006

J. D. Gibson, B. Wei and S. Choudhury, Voice Communications over Tandem Wireline IP and WLAN Connections, Proceedings of the Fortieth Annual Asilomar Conference on Signals, Systems, and Computers, October 29 - November 1, 2006. [pdf]

J. Hu and J. D. Gibson, New Block-Based Local-Texture-Dependent Correlation Model of Digitized Natural Video, Proceedings of the Fortieth Annual Asilomar Conference on Signals, Systems, and Computers, October 29 - November 1, 2006. [pdf]

S. Choudhury, N. Shetty and J. D. Gibson, MOSx and Voice Outage Rate in Wireless Communications, Proceedings of the Fortieth Annual Asilomar Conference on Signals, Systems, and Computers, October 29 - November 1, 2006. [pdf]

J. W. Jung and J. D. Gibson, The Interpretation of Spectral Entropy Based Upon Rate Distortion Functions, 2006 IEEE International Symposium on Information Theory, Seattle, Wash., July 9-14, 2006. [pdf]

N. Shetty, S. Choudhury, and J. D. Gibson. Voice Capacity under Quality Constraints for IEEE 802.11a based WLANs, ACM International Wireless Communication and Mobile Computing Conference (IWCMC), Vancouver, Canada, July 3-6, 2006. [pdf]

S. Choudhury, I. Sheriff, J. D. Gibson, E. Belding-Royer, Effect of Payload Length Variation and Retransmissions on Multimedia in WLANs, ACM International Wireless Communication and Mobile Computing Conference (IWCMC), Vancouver, Canada, July 3-6, 2006. [pdf]

J. Balam and J. D. Gibson, Multiple Descriptions and Path Diversity Using the AMR-WB Speech Codec for Voice Communications over MANETs, ACM International Wireless Communication and Mobile Computing Conference (IWCMC), Vancouver, Canada, July 3-6, 2006. [pdf]

J. Hu, S. Choudhury and J. D. Gibson, PSNR_{r,f} : Assessment of Delivered AVC/H.264 Video Quality over 802.11a WLANs with Multipath Fading, MultiComm 2006, Istanbul, Turkey, June 2006. [pdf]

B. L. Sturm and J. D. Gibson, Matching Pursuit Decompositions of Non-noisy Speech Signals Using Several Dictionaries, IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Toulouse, France, May 14-19, 2006. [pdf]

N. Shetty and J. D. Gibson, Improving the Robustness of the G.722 Wideband Speech Codec to Packet Losses for Voice over WLANs, IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Toulouse, France, May 14-19, 2006. [pdf]

S. Choudhury and J. D. Gibson, Payload Length and Rate Adaptation for Throughput Optimization in Wireless LANs, IEEE Vehicular Technology Conference (VTC), Melbourne, Australia, May 7-10, 2006. [pdf]

H. Dong and J. D. Gibson Structures for SNR Scalable Speech Coding, IEEE Transactions on Speech and Audio Processing, May 2006.

S. Choudhury and J. D. Gibson, Joint PHY/MAC Based Link Adaptation for Wireless LANs with Multipath Fading, Wireless Communication and Networking Conference (WCNC) Las Vegas, NV, April 3-6, 2006. [pdf]

J. Balam and J. D. Gibson, Path Diversity and Multiple Descriptions with Rate Dependent Packet Losses, Information Theory and Applications Workshop, University of California, San Diego, La Jolla, CA, February 6-10, 2006. [pdf]

J. D. Gibson, B. Wei, and H. Dong, Speech Signal Processing: Coding, Transmission, and Storage, in Chap. 15.1, The Electrical Engineering Handbook, 3rd Ed., Circuits, Signals, and Speech and Image Processing, R. C. Dorf, Editor, CRC Press, Boca Raton, FL, pp. 15-1--15-12, 2006.

2005

J. D. Gibson Speech Coding Methods, Standards, and Applications, IEEE Circuits and Systems Magazine, Vol. 5, No. 4, Fourth Quarter 2005, pp. 3049. [pdf]

J. Balam and J. D. Gibson Multiple Description Coding and Path Diversity for Voice Communication over MANETs, Proceedings of the Asilomar Conference on Signals, Systems, and Computers, October 30 - November 2, 2005. [pdf]

J. Hu and J. D. Gibson Intra-mode Indexed Nonuniform Quantization Parameter Matrices in AVC/H.264, Proceedings of the Asilomar Conference on Signals, Systems, and Computers, October 30 - November 2, 2005. [pdf]

I. Chakeres, H. Dong, E. Belding-Royer, A. Gersho, and J. D. Gibson Allowing Bit Errors in Speech over Wireless LANs, Elsevier Computer Communications Journal, 28, pp. 1643-1657, March 2005. [pdf]

W. Yang, J. D. Gibson, and T. He Coefficient Rate and Lossy Source Coding, IEEE Trans. on Information Theory, Vol. 51, No. 1, pp.381-386, Jan. 2005. [pdf]

B. L. Sturm and J. D. Gibson Signals and Systems Using MATLAB: An Integrated Suite of Applications for Exploring and Teaching Media Signal Processing, 35th ASEE/IEEE Frontiers in Education (FIE) Conf., Oct 2005. [pdf]

2004

B. Wei, H. Dong and J. D. Gibson Application of NB/WB AMR Speech Codecs in the 30kHz TDMA System, IEEE Trans. on Wireless Communications, Vol. 3, No.6, pp. 1890-1896, Nov. 2004.

J.D. Gibson and B. Wei Tandem Voice Communications: Digital Cellular, VoIP and Voice over Wi-Fi, Global Telecommunications Conference 2004 (GLOBECOM '04), Vol. 2, pp 617-621. [pdf]

J.D. Gibson, A.Servetti, H. Dong, A. Gersho, T. Lookabaugh, J.C. De Martin Selective Encryption and Scalable Coding for Voice Communications over Multi-hop Wireless Links, Proceedings of IEEE Military Communications Conference (MILCOM), Monterey, California, USA, November 2004. [pdf]

Hui Dong, Ian D. Chakeres, Allen Gersho, Elizabeth M. Belding-Royer and J. D. Gibson Selective Bit-error Checking at the MAC layer for Voice Over Mobile Ad hoc Networks with IEEE 802.11. , Proceedings of the IEEE Wireless Communications and Networking Conference (WCNC), Atlanta, Georgia, March 2004. [pdf]

J. Balam and J.D. Gibson Adaptive Event Coverage using High Power Mobiles over a Sensor Field, IEEE Vehicular Technology Conference (VTC), Fall 2004. [pdf]

H. Dong, A. Gersho, J. Gibson and V. Cuperman A Multiple Description Speech Coder Based on AMR-WB for mobile Ad Hoc Networks, IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), May 17-21, 2004. [pdf]

2003

Hui Dong, Ian D. Chakeres, C.-H. Lin, Allen Gersho, Elizabeth Belding-Royer, U. Madhow and Jerry Gibson Speech Coding for Mobile Ad hoc Networks, Proceedings of the Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, November 2003. [pdf]

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Posters & Presentations

J. D. Gibson, Information Transmission over Single and 2X2 MIMO Channels, SMU, Dallas, TX, March 26, 2008

J. D. Gibson, Voice and Video over Wireless Networks, Engineering Science Lecture Series, Sonoma State University, Feb. 21, 2008.

J. D. Gibson, Voice and Video over Wireless Networks, Wireless Networking and Communications Seminar Series, Dept. of Electrical and Computer Engineering, University of Texas, Austin, TX, Sept. 20, 2007.

J. D. Gibson, Voice and Video over Wireless Networks, IEEE Communications Society Distinguished Lecture, National Instruments, Austin, TX, Sept. 20, 2007.

J. D. Gibson, Voice and Video over Wireless Networks, IEEE Communications Society Distinguished Lecture, Clear Lake-NASA, Sept. 19, 2007.

J. D. Gibson, Tandem Voice Communications, IEEE Communications Society Distinguished Lecture, Richardson, TX, Sept. 18, 2007.

J. D. Gibson, Voice and Video over Wireless Networks, seminar at the University of Texas at Dallas, Mar 28, 2007. [abstract]

J. D. Gibson Wide Open Spaces or Mostly Wireless Most of the Time, plenary talk at the 62nd IEEE Vehicular Technology Conference (VTC), Sep 28, 2005. [pdf]

S. Choudhury and J. D. Gibson Link Adaptation and Cross Layer Design for Multimedia Communications presented at the ECE Departmental Research Review, Oct 28, 2005. [pdf]

J. Hu and J. D. Gibson Intra-mode Indexed Nonuniform Quantization Parameter Matrices in AVC/H.264 presented at the ECE Departmental Research Review, Oct 28, 2005. [pdf]

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Alumni

Megha Manohara : Master Student : 2007-09 :
Archana Gopalan : Master Student : 2007-09 : Currently at Intel Coorporation
Jagadeesh Balam : Doctoral Student : 2004-07 : Currently at Ditech Networks
Sayantan Choudhury : Doctoral Student : 2004-07 : Currently at Sharp Laboratories of America, Inc.
Jing Hu : Doctoral Student : 2004-07 : Currently at Cisco Systems, Inc.
Niranjan Shetty : Doctoral Student : 2004-07 : Currently at Fair Isaac Corporation
Hui Dong : Post-doctoral Researcher : 2003-04 : Currently at U4EA Technologies
Jaewoo Jung : Doctoral Student : 2002-06 : Currently at Samsung Advanced Insititute of Technology
Marcus Nyström : Visiting Researcher : 2007 : Lund University
Antonio Servetti : Visiting Researcher : 2003-04 : Politecnico di Torino

L-R: Jing Hu, Jagadeesh Balam, Jessica McAllister, Bob Sturm, Sayantan Choudhury, Dr. Jerry D. Gibson, Lisseth Villareal, Niranjan Shetty
In Absentia: Jaewoo Jung