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Dr. K. P. Subbalakshmi Personal Webpage Dr. K. P. Subbalakshmi Associate Professor School:   Schaefer School of Engineering & Science Department:   Electrical and Computer Engineering Program:   Electrical Engineering Research Center:   Center for Intelligent Networked Systems Location: 208 Burchard Phone: 201.216.8641 Fax: 201.216.8246 Email: ksubbala@stevens.edu Courses: EE 612 EE 610 CPE 591 CPE 612   Close EE 612:Principles of Multimedia Compression Brief introduction to Information Theory; entropy and rate; Kraft-McMillan inequality; entropy codes - Huffman and arithmetic codes; scalar quantization-quantizer design issues, the Lloyd quantizer and the Lloyd-Max quantizer; vector quantization - LBG algorithm, other quantizer design algorithms; structured VQs; entropy constrained quantization; bit allocation techniques: generalized BFOS algorithm; brief overview of linear algebra; transform coding: KLT, DCT, LOT; subband coding; wavelets; wavelet based compression algorithms (third generation image compression schemes)- EZW algorithm, the SPIHT algorithm and the EBCOT algorithm; video compression: motion estimation and compensation; image and video coding standards: JPEG/ JPEG 2000, MPEG, H.263, H.263+; Source coding and error resilience. Close EE 610:Error Control Coding for Networks Error-control mechanisms; Elements of algebra; Linear block codes; Linear cyclic codes; fundamentals of convolutional codes; Viterbi decoding codes in mobile communications; Trellis-coded modulation; concatenated coding systems and turbo codes; BCH codes; Reed-Solomon codes; implementation architectures and applications of RS codes; ARQ and interleaving techniques. Close CPE 591:Introduction to Multimedia Networking The objective of this course is to introduce current techniques in multimedia communications especially as applied to wireless networks. The course will introduce the basic issues in multimedia communications and networking. Topics covered include: multimedia information representation - text, images, audio, video; introduction to information theory - information of a source, average information of a discrete memoryless source, source coding for memoryless sources; multimedia compression - text, image, audio, video; standards for multimedia communications; transmissions and protocols; circuit switched networks; the Internet; broadband ATM networks; packet video in the network environment; transport protocols - TCP/IP; TCP; UDP; RTP and RTCP; wireless networks - models, characteristics; error resilience for wireless networks. Close CPE 612:Principles of Multimedia Compression Modeling of image signals; 2D prediction theory and application to DPCM/ADM coding of images; subband coding of images; filters for subband coding; transform coding of images; comparison of various transforms like KLT, DCT, LOT; vector quantizing theory, vector quantizing algorithms like the LBG algorithm; VQ for image coding. Research & Education Research Cognitive radio networks: security and design; Steganography, steganalysis and media forensics; Deception detection on the Internet and Wireless security Experience & Service General Information Dr. Subbalakshmi (Suba) is an Associate Professor at the Electrical and Computer Engineering, Stevens Institute of Technology, where she co-founded and co-directs the  Media Security, Networking and Communications (MSyNC) Laboratory. Her research interests lie in Information and Network Security, Cognitive Radio Networks and Wireless and Multimedia Networking and Coding. Suba is also a Co-founder and the Vice-President of InStream Media LLC.     Experience Visting Researcher, IRISA, INRIA, Rennes, France, October 2007. Co-Founder and Vice-President, InStrem Media, LLC, (December 2006) Assistant Professor, Dept of E.C.E, Stevens Institue of Technology, (Fall 2000 - August 31 2007) Technogenesis Service Member, Stevens Patent Commitee, August 2007 --   Achievements & Professional Societies Grants, Contracts & Funds RECENT GRANTS Security-Resource Trade-Offs in Wireless Networks, National Science Foundation, Cyber-Trust Program. Watermarking and Internet Forensics, with R. Chandramouli Compression Driven Routing, US Army Picatinny Arsenal, Acoustic and Network Sensors Program. Energy Efficient, Error Resilient Encryption for Wireless Security, US Army Picatinny Arsenal, iNETS, with R. Chandramouli. Sensor Data Correlation Modelling and Compression for Ocean Sensor Networks, ONR/Maritime Security Laboratory Security in the Distributed Environment, US Army Picatinny Arsenal/ WiNSec Perspectives on Information Hiding for Multimedia Security, National Science Foundation, with R. Chandramouli Improving Steganographic Capacity in the Presence of Attacks via Multiple Description and Joint Source-Channel Coding, Airforce Research Laboratory, Rome NY. Lightweight Error Resilient Cryptographic Systems for Wireless Network Security, US Army Picattiny Arsenal/WiNSec     Patents & Inventions Palak Amin and K.P. Subbalakshmi,  "A Robust Image Watermark Extraction Algorithm for Scaling Attacks", U.S Patent. Honors & Awards Stevens Technogenesis Award for Research and Technology Contributions, 2007. Stevens President’s Research Recognition Award, 2003. Professional Societies Senior Member IEEE, Secretary, Multimedia Communications Technical Committee (MMC-TC), IEEE COMSOC. Chair, Special Interest Group on Security,  IEEE MMC-TC, COMSOC. Selected Publications Journals Zituo Jin, S. Anand and K.P. Subbalakshmi. "Mitigating Primary User Emulation Attacks in Dynamic Spectrum Access Networks using Hypothesis Testing", Mobile Computing and Communications Review, Special Issue on Cognitive Radio Technologies and Systems, ACM.